--- LS1 SWAP Question and Answer ---
01-26-2003, 11:49 AM
#1
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Costal Alabama
Posts: 2,136
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Iroc-Z
Engine: 350, ZZ4 equivalent
Transmission: Pro-Built Road Race 700R4
Axle/Gears: 3.23 Dana 44
--- LS1 SWAP Question and Answer ---
Many people including myself want more information on the LS1 swap so I have compiled this information from many posts and hours of reading. Please help me out and add any info you can think of. Also if anything is incorrect feel free to correct me.
LS1 Advantages & features:
- All aluminum block, oil pan, and plastic intake manifold saves roughly 100-150 lb off the front end of the car.
- Sequential Fuel injection (good for gas mileage)
- DIS, 1 coil per cylinder
- Camaro\Firebird LS1’s are rated stock 305-335(depending on the year and model) Rear wheel HP!
- 6 bolt main
- 15 degree cylinder heads
Q: Will the LS1 fit under the stock hood?
A: Yes
Q: Are there any clearance issues with the LS1 engine?
A: Here are a few that may arise:
1) You may need to cut away at a frame cross brace bracket for clearance of the A/C compressor, as see here, or here.
2) The stock LS1 coils may hit the heater box. You can get around this by modifying the coil bracket or using the truck 6.0 LS1 coils.
3) You will have to notch the cross member if you would like to use the A/C that comes on the 98-2002 F-Body LS1’s (more info below)
Q: Are any parts interchangeable between the LS1 (Gen III SBC) and the Gen I and II (LT1) SBC?
A: No, the LS1 is a completely new engine design.
Q: Do you need special motor mounts?
A: Yes, You can buy the motor mounts, transmission cross member, and other LS1 swap products from the dealers links at the bottom of this post.
Q: Can you use the stock transmission cross member?
A: No, not without modifying it. Yes, You can buy the motor mounts, transmission cross member, and other LS1 swap products from the dealers links at the bottom of this post.
Q: Can you use your stock driveshaft with the LS1 manual T56 or 4L60E auto transmission?
A: Yes
Q: Can you use the stock driveshaft off a 98-2002 F-body LS1 manual T56 or 4L60E auto transmission car?
A: Yes
Q: Can you use your stock gauges?
A:
Speedometer:
- Electronically driven speedometer (90+ Camaro, 87+ Firebird)
Electronically driven speedometer can be reused on the LS1 swap. You will need to reprogram the LS1 computer so it will output the proper signal to the stock gauge cluster. Another option is to purchase a signal conversion box like the ones from the dealers links below to convert the signal outputted by the VSS (vehicle speed sensor) into the proper signal for the stock speedometer.
- Cable drive speedometer (pre 90 Camaro, pre 87 Firebird)
If you have a cable driven speedometer you can hook up a cable drive unit More info here OR you can buy a modified tail housing for your transmission from http://www.jagsthatrun.com/. This tail housing will give you the ability to use your stock cable drive speedometer.
Tach:
You can use the stock tach but it will be off slightly you will need to use a calibration box to make it fully accurate.
Temp gauge:
You can use the LS1 stock sender on the LS1 block.
You can also use the stock thirdgen temperature gauge sending sensor. This sender can be mounted on the driver or passenger side head on the LS1. You will need to drill and tap the hole to fit the stock bigger sending unit, as seen here.
http://www.montecarloss.com/ls1monte...s/TempInst.jpg
Fuel gauge:
This won’t be a problem; this is tied to your fuel sending unit.
Battery Volts gauge:
Also not a problem, tie up to the batter and has nothing to do with engine.
Oil pressure gauge:
anyone????
Q: Will I have to make my own fuel lines?
A: Yes, this can be done with AN hose and AN fittings. To convert your stock fuel line fitting (Fuel line from the fuel tank) to AN fittings you will need Earl's 9894DBH and 9894DBJ fuel fittings.
Also you will need a fuel pressure regulator which will give you the return line that the 98-2002 F-Body LS1 fuel rail does not have. Here is one that will work: Aeromotive A1000-6 P/N 13109
To connect this all to the LS1 fuel rail you will need to weld or braze an AN fitting on the fuel inlet on the LS1 fuel rail. Or you can buy the fittings from http://www.hotrodlane.cc/ to convert the stock LS1 fuel rail fitting to an AN fitting.
Another option is to use a fuel rail out of a 97 corvette. These rails have a return line on them, you will still need to modify the rail to accept AN fittings (or buy the conversion fittings as mentioned above).
Q: Will I need a new fuel pump?
A: You can use your stock TPI fuel pump but I don’t think it will last very long running at the stock LS1 58 PSI, I recommend a aftermarket high pressure pump. If you have a TBI or carbureted car you will have to buy a new high pressure pump. A good pump to get is the WALBRO GSS340M. You can get this pump with hot wire kit from http://www.racetronix.com/.
Q: What about the wiring harness?
A: You can use a stock LS1 wiring harness. Or you can buy one from painless wiring.
Q: Is there any chip programming software or hardware for the LS1?
A:
You can use LS1 Edit to reprogram the computer, http://www.carputing.com
Q: Can I use the stock LS1 computer?
A: Yes but you will have to get it reprogrammed or reprogram it yourself to disable things like VATS, fuel tank pressure sensor, rear O2 sensors.
Q: Can I use my stock thirdgen harness or computer?
A: No
Q: What to do about VATS?
A: You can disable VATS by reprogramming the computer. Also most aftermarket wire harnesses come with a VATS bypass box.
Q: Won’t the computer trough a code without the LS1 gas tank pressure sensor?
A: Yes, but you can disable this sensor by reprogramming the ECM using software like LS1Edit.
Q: Where do you mount the ECM?
A: Is the ECM watertight??? If so then it could be mounted under the hood. Does anyone know if it will fit in the factory position?
Q: Will the stock SBC Gen I or II headers bolt up to a LS1?
A: No, SBC Gen I and II has exhaust ports like this:
O OO O
And LS1 look like this:
O O O O
Q: Will the stock exhaust system bolt up?
A: No, you will need to fabricate your own exhaust system. The stock cast iron LS1 headers will fit but you will need to fabricate the piping from the headers to the muffler. Also you will have to create 4 O2 bungs in the exhaust to mount the 4 oxygen sensors the computer needs. You can reprogram the computer to eliminate the 2 after cat oxygen sensors or you can buy oxygen sensor simulators for the back to oxygen sensors.
Hawks Third Gen now sells custom long tube headers for LSx swaps also.
Q: What is the difference from a ls1 and ls6?
A: The LS6 has different heads and Cam (the 97-2000 LS1 has a different intake). 2001+ LS1 blocks use the LS6 intake.
Q: Has the LS1 block had any revisions?
A: Yes, GM have released a few new castings over the years. I believe the most recent casting is the 2000+ block. They have improved the oiling system in the newest casting.
Q: Can I use a LS1 out of a C5 corvette (Y-Body)?
A: Yes, you will need to do some more fabrication and time to make it work. First the corvette oil pan will not work; you will need to switch it with a 98-2002 F-Body pan. Also the corvette has drive-by-wire which means there is no throttle cable. You will have to rig up the throttle position sensor the corvettes use directly to the gas pedal.
Q: What car should I get my LS1 from for a swap?
A: Most people on this site use LS1 from a 98-2002 F-body so you will find the most information on this swap on this site. If you do decide to get a LS1 from an F-body the best years to look for is a 2001-2002 block. These blocks have the LS6 intake and a revised block design.
Q: Can you still have A/C with an LS1?
A: Yes, there are a few options.
1) I feel this is the easiest and lest time consuming option. You can buy the conversion brackets from the parts dealers listed at the bottom of this post. This will allow you mount your stock AC compressor to the LS1 pulley setup.
2) If you want to use the stock LS1 A/C compressor you need to cut away at the engine cross member and notch it as shown here Click here.
You will also need to you will have to fabricate your own AC Lines. Anyone know what type of pipe or hose you would use for this?
The corvette accessories may resolve this problem. As seen in the pictures in the post below you can see that the A/C compressor is in a higher location on the corvette accessories. It may work but I can’t say for sure since I have no way of knowing if it will work.
Q: Will the Lightweight LS1 raise the front end of my car?
A: Yes it will. The general number I tend to hear is about an inch.
Helpful links:
Gen III & IV small block information
http://en.wikipedia.org/wiki/GM_LS_engine
http://www.novak-adapt.com/knowledge...ion_III_v8.htm
http://www.trifive.com/forums/showthread.php?t=26648
Gen III\IV truck motors
Forums:
http://www.ls1tech.com/
http://www.ls1info.com
http://www.ls1.com/
Swaps:
http://www.montecarloss.com/ls1montecarloss/
http://www.team3rdgen.com/modules.php?name=3rdGenLS1
Parts Dealers:
http://www.hotrodlane.cc/ (really busy website)
http://www.hawksthirdgenparts.com/ls...sionparts.aspx
http://www.spohn.net/shop/1982-1992-...SX-Swap-Parts/
http://www.youngsfbody.com/ls1_conversion
ECM/ECU/PCM Tuning software:
http://www.hptuners.com/
http://www.efilive.com/
http://www.tunercat.com/
http://www.carputing.com/
Last updated: 7/20/2005
LS1 Advantages & features:
- All aluminum block, oil pan, and plastic intake manifold saves roughly 100-150 lb off the front end of the car.
- Sequential Fuel injection (good for gas mileage)
- DIS, 1 coil per cylinder
- Camaro\Firebird LS1’s are rated stock 305-335(depending on the year and model) Rear wheel HP!
- 6 bolt main
- 15 degree cylinder heads
Q: Will the LS1 fit under the stock hood?
A: Yes
Q: Are there any clearance issues with the LS1 engine?
A: Here are a few that may arise:
1) You may need to cut away at a frame cross brace bracket for clearance of the A/C compressor, as see here, or here.
2) The stock LS1 coils may hit the heater box. You can get around this by modifying the coil bracket or using the truck 6.0 LS1 coils.
3) You will have to notch the cross member if you would like to use the A/C that comes on the 98-2002 F-Body LS1’s (more info below)
Q: Are any parts interchangeable between the LS1 (Gen III SBC) and the Gen I and II (LT1) SBC?
A: No, the LS1 is a completely new engine design.
Q: Do you need special motor mounts?
A: Yes, You can buy the motor mounts, transmission cross member, and other LS1 swap products from the dealers links at the bottom of this post.
Q: Can you use the stock transmission cross member?
A: No, not without modifying it. Yes, You can buy the motor mounts, transmission cross member, and other LS1 swap products from the dealers links at the bottom of this post.
Q: Can you use your stock driveshaft with the LS1 manual T56 or 4L60E auto transmission?
A: Yes
Q: Can you use the stock driveshaft off a 98-2002 F-body LS1 manual T56 or 4L60E auto transmission car?
A: Yes
Q: Can you use your stock gauges?
A:
Speedometer:
- Electronically driven speedometer (90+ Camaro, 87+ Firebird)
Electronically driven speedometer can be reused on the LS1 swap. You will need to reprogram the LS1 computer so it will output the proper signal to the stock gauge cluster. Another option is to purchase a signal conversion box like the ones from the dealers links below to convert the signal outputted by the VSS (vehicle speed sensor) into the proper signal for the stock speedometer.
- Cable drive speedometer (pre 90 Camaro, pre 87 Firebird)
If you have a cable driven speedometer you can hook up a cable drive unit More info here OR you can buy a modified tail housing for your transmission from http://www.jagsthatrun.com/. This tail housing will give you the ability to use your stock cable drive speedometer.
Tach:
You can use the stock tach but it will be off slightly you will need to use a calibration box to make it fully accurate.
Temp gauge:
You can use the LS1 stock sender on the LS1 block.
You can also use the stock thirdgen temperature gauge sending sensor. This sender can be mounted on the driver or passenger side head on the LS1. You will need to drill and tap the hole to fit the stock bigger sending unit, as seen here.
http://www.montecarloss.com/ls1monte...s/TempInst.jpg
Fuel gauge:
This won’t be a problem; this is tied to your fuel sending unit.
Battery Volts gauge:
Also not a problem, tie up to the batter and has nothing to do with engine.
Oil pressure gauge:
anyone????
Q: Will I have to make my own fuel lines?
A: Yes, this can be done with AN hose and AN fittings. To convert your stock fuel line fitting (Fuel line from the fuel tank) to AN fittings you will need Earl's 9894DBH and 9894DBJ fuel fittings.
Also you will need a fuel pressure regulator which will give you the return line that the 98-2002 F-Body LS1 fuel rail does not have. Here is one that will work: Aeromotive A1000-6 P/N 13109
To connect this all to the LS1 fuel rail you will need to weld or braze an AN fitting on the fuel inlet on the LS1 fuel rail. Or you can buy the fittings from http://www.hotrodlane.cc/ to convert the stock LS1 fuel rail fitting to an AN fitting.
Another option is to use a fuel rail out of a 97 corvette. These rails have a return line on them, you will still need to modify the rail to accept AN fittings (or buy the conversion fittings as mentioned above).
Q: Will I need a new fuel pump?
A: You can use your stock TPI fuel pump but I don’t think it will last very long running at the stock LS1 58 PSI, I recommend a aftermarket high pressure pump. If you have a TBI or carbureted car you will have to buy a new high pressure pump. A good pump to get is the WALBRO GSS340M. You can get this pump with hot wire kit from http://www.racetronix.com/.
Q: What about the wiring harness?
A: You can use a stock LS1 wiring harness. Or you can buy one from painless wiring.
Q: Is there any chip programming software or hardware for the LS1?
A:
You can use LS1 Edit to reprogram the computer, http://www.carputing.com
Q: Can I use the stock LS1 computer?
A: Yes but you will have to get it reprogrammed or reprogram it yourself to disable things like VATS, fuel tank pressure sensor, rear O2 sensors.
Q: Can I use my stock thirdgen harness or computer?
A: No
Q: What to do about VATS?
A: You can disable VATS by reprogramming the computer. Also most aftermarket wire harnesses come with a VATS bypass box.
Q: Won’t the computer trough a code without the LS1 gas tank pressure sensor?
A: Yes, but you can disable this sensor by reprogramming the ECM using software like LS1Edit.
Q: Where do you mount the ECM?
A: Is the ECM watertight??? If so then it could be mounted under the hood. Does anyone know if it will fit in the factory position?
Q: Will the stock SBC Gen I or II headers bolt up to a LS1?
A: No, SBC Gen I and II has exhaust ports like this:
O OO O
And LS1 look like this:
O O O O
Q: Will the stock exhaust system bolt up?
A: No, you will need to fabricate your own exhaust system. The stock cast iron LS1 headers will fit but you will need to fabricate the piping from the headers to the muffler. Also you will have to create 4 O2 bungs in the exhaust to mount the 4 oxygen sensors the computer needs. You can reprogram the computer to eliminate the 2 after cat oxygen sensors or you can buy oxygen sensor simulators for the back to oxygen sensors.
Hawks Third Gen now sells custom long tube headers for LSx swaps also.
Q: What is the difference from a ls1 and ls6?
A: The LS6 has different heads and Cam (the 97-2000 LS1 has a different intake). 2001+ LS1 blocks use the LS6 intake.
Q: Has the LS1 block had any revisions?
A: Yes, GM have released a few new castings over the years. I believe the most recent casting is the 2000+ block. They have improved the oiling system in the newest casting.
Q: Can I use a LS1 out of a C5 corvette (Y-Body)?
A: Yes, you will need to do some more fabrication and time to make it work. First the corvette oil pan will not work; you will need to switch it with a 98-2002 F-Body pan. Also the corvette has drive-by-wire which means there is no throttle cable. You will have to rig up the throttle position sensor the corvettes use directly to the gas pedal.
Q: What car should I get my LS1 from for a swap?
A: Most people on this site use LS1 from a 98-2002 F-body so you will find the most information on this swap on this site. If you do decide to get a LS1 from an F-body the best years to look for is a 2001-2002 block. These blocks have the LS6 intake and a revised block design.
Q: Can you still have A/C with an LS1?
A: Yes, there are a few options.
1) I feel this is the easiest and lest time consuming option. You can buy the conversion brackets from the parts dealers listed at the bottom of this post. This will allow you mount your stock AC compressor to the LS1 pulley setup.
2) If you want to use the stock LS1 A/C compressor you need to cut away at the engine cross member and notch it as shown here Click here.
You will also need to you will have to fabricate your own AC Lines. Anyone know what type of pipe or hose you would use for this?
The corvette accessories may resolve this problem. As seen in the pictures in the post below you can see that the A/C compressor is in a higher location on the corvette accessories. It may work but I can’t say for sure since I have no way of knowing if it will work.
Q: Will the Lightweight LS1 raise the front end of my car?
A: Yes it will. The general number I tend to hear is about an inch.
Helpful links:
Gen III & IV small block information
http://en.wikipedia.org/wiki/GM_LS_engine
http://www.novak-adapt.com/knowledge...ion_III_v8.htm
http://www.trifive.com/forums/showthread.php?t=26648
Gen III\IV truck motors
Forums:
http://www.ls1tech.com/
http://www.ls1info.com
http://www.ls1.com/
Swaps:
http://www.montecarloss.com/ls1montecarloss/
http://www.team3rdgen.com/modules.php?name=3rdGenLS1
Parts Dealers:
http://www.hotrodlane.cc/ (really busy website)
http://www.hawksthirdgenparts.com/ls...sionparts.aspx
http://www.spohn.net/shop/1982-1992-...SX-Swap-Parts/
http://www.youngsfbody.com/ls1_conversion
ECM/ECU/PCM Tuning software:
http://www.hptuners.com/
http://www.efilive.com/
http://www.tunercat.com/
http://www.carputing.com/
Last updated: 7/20/2005
Last edited by 89 Iroc Z; 07-03-2009 at 10:32 PM.
01-26-2003, 11:50 AM
#2
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Costal Alabama
Posts: 2,136
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Iroc-Z
Engine: 350, ZZ4 equivalent
Transmission: Pro-Built Road Race 700R4
Axle/Gears: 3.23 Dana 44
More Info...
LS1 Engine Specifications (obtained from LS1 Engine Kit Installation guide PN 88959384):
GENERAL:
Displacement: 5.7 liters (5665cc, 346ci)
Horsepower: 310 @ 5200 rpm
Torque: 340 lb-ft @ 4000 rpm
Compression Ratio: 10.1:1
Bore x Stroke: 3.90” x 3.62”
Firing Order: 1-8-7-2-6-5-4-3
Redline: 6200 RPM (PCM limited)
CYLINDER BLOCK:
Material: 319-T5 aluminum
Description: 90 degree V, deep skirt with cast-in iron sleeves
Bore Spacing: 4.40”
Deck Height: 9.24”
Main Bearings: 5
Thrust Bearing: Center Bulkhead
Bearing Caps: 4 vertical bolts, 2 cross bolts
CYLINDER HEADS:
Material: 356-T6 aluminum
Description: Cross flow, wedge combustion chamber
Ports: Symmetrical, intake and exhaust
Chamber Volume: 67.3 cc
Head Gasket: 0.052” compressed
CRANKSHAFT:
Material: Cast nodular iron
Features: Undercut and rolled fillets
Crank Pin Diameter: 2.10”
Main Bearing Diameter: 2.56”
PISTONS:
Material: Cast aluminum
Description: Strutless, flat top
Compression Height: 1.34”
Weight: 15.5 oz
INDUCTION SYSTEM:
Manifold: One-piece plastic composite
Throttle Body: 75.0 mm bore diameter
Some other info I found searching:
A/C related (talked about in 1’st post):
ALL PIC’s BELOW taken from http://www.hotrodlane.cc/
Pictures Attached below
98-2002 LS1 F-Body (Camaro / Firebird) accessories setup (right)
Camaro balancer is 3/4” longer than the corvette.
97+ LS1 Y-body corvette accessories setup (left)
As you can see from the raised position of the A/C compressor on the corvette accessories it may be possible that this would eliminate the need to notch the frame cross member to use a LS1 A/C compressor.
Last updated: 9/22/2004
GENERAL:
Displacement: 5.7 liters (5665cc, 346ci)
Horsepower: 310 @ 5200 rpm
Torque: 340 lb-ft @ 4000 rpm
Compression Ratio: 10.1:1
Bore x Stroke: 3.90” x 3.62”
Firing Order: 1-8-7-2-6-5-4-3
Redline: 6200 RPM (PCM limited)
CYLINDER BLOCK:
Material: 319-T5 aluminum
Description: 90 degree V, deep skirt with cast-in iron sleeves
Bore Spacing: 4.40”
Deck Height: 9.24”
Main Bearings: 5
Thrust Bearing: Center Bulkhead
Bearing Caps: 4 vertical bolts, 2 cross bolts
CYLINDER HEADS:
Material: 356-T6 aluminum
Description: Cross flow, wedge combustion chamber
Ports: Symmetrical, intake and exhaust
Chamber Volume: 67.3 cc
Head Gasket: 0.052” compressed
CRANKSHAFT:
Material: Cast nodular iron
Features: Undercut and rolled fillets
Crank Pin Diameter: 2.10”
Main Bearing Diameter: 2.56”
PISTONS:
Material: Cast aluminum
Description: Strutless, flat top
Compression Height: 1.34”
Weight: 15.5 oz
INDUCTION SYSTEM:
Manifold: One-piece plastic composite
Throttle Body: 75.0 mm bore diameter
Some other info I found searching:
Originally posted by wm_sorg
Some firebirds came with the LS6 block in 01 and 02. There was a surplus of LS6 castings that GM let go into the late f-bodies. I was fortunate to get one.
I still had to pay a premium for this, but it was not as bad as the LS6 tax. With the money leftover I did cam, springs, and a few other things to get it up to LS6 specs.
In 2001 all LS1 engines inherited the LS6 intake. About 25% of f-bodies got the LS6 block.
The casting number is the only way to tell.
12561168 LS6 block. In this version, the only difference between the LS6 engine is the heads, cam and windage tray under the plenum.
12559378 LS1 block. Uses a different block, heads, and cam, windage tray, etc.
Overall the LS6 block is stronger and has about 80% better internal windage than the original LS1 casting. As of 03 all LS1 engines use the LS6 block.
Some firebirds came with the LS6 block in 01 and 02. There was a surplus of LS6 castings that GM let go into the late f-bodies. I was fortunate to get one.
I still had to pay a premium for this, but it was not as bad as the LS6 tax. With the money leftover I did cam, springs, and a few other things to get it up to LS6 specs.
In 2001 all LS1 engines inherited the LS6 intake. About 25% of f-bodies got the LS6 block.
The casting number is the only way to tell.
12561168 LS6 block. In this version, the only difference between the LS6 engine is the heads, cam and windage tray under the plenum.
12559378 LS1 block. Uses a different block, heads, and cam, windage tray, etc.
Overall the LS6 block is stronger and has about 80% better internal windage than the original LS1 casting. As of 03 all LS1 engines use the LS6 block.
Originally posted by Parrydise7
There are a couple of publications that you may want to check out. GM has a booklet entitled, "LS1 Engine Kit Installation Guide." Yes, GM does sell an LS1 kit (p/n 25534322).The p/n on my booklet is 88959384. At 36 pages, with a list price of $50.00 I have a hard time recommending it, but it is helpful.
GM was apparently thinking swap when it designed the LS1. The LS1 engine block has multiple bosses that can be used for custom engine mounts (it looks like GM did its homework and anticipated that this engine would go into a wide variety of vehicles). The booklet even has a template, with dimensions, to fabricate motor mount brackets.
The other publication is an article in the May 2002 issue of Chevy High Performance entitled, "Interchangeable LS1." While this article is limited in its coverage, it recommends that you get the GM publication. BTW, the January, 2002 issue of Hot Rod magazine has an article on how to add 59 horsepower to an LS1 (using an SLP cam kit, a high-flow LS6 intake manifold and some basic head work).
Good luck.
There are a couple of publications that you may want to check out. GM has a booklet entitled, "LS1 Engine Kit Installation Guide." Yes, GM does sell an LS1 kit (p/n 25534322).The p/n on my booklet is 88959384. At 36 pages, with a list price of $50.00 I have a hard time recommending it, but it is helpful.
GM was apparently thinking swap when it designed the LS1. The LS1 engine block has multiple bosses that can be used for custom engine mounts (it looks like GM did its homework and anticipated that this engine would go into a wide variety of vehicles). The booklet even has a template, with dimensions, to fabricate motor mount brackets.
The other publication is an article in the May 2002 issue of Chevy High Performance entitled, "Interchangeable LS1." While this article is limited in its coverage, it recommends that you get the GM publication. BTW, the January, 2002 issue of Hot Rod magazine has an article on how to add 59 horsepower to an LS1 (using an SLP cam kit, a high-flow LS6 intake manifold and some basic head work).
Good luck.
A/C related (talked about in 1’st post):
ALL PIC’s BELOW taken from http://www.hotrodlane.cc/
Pictures Attached below
98-2002 LS1 F-Body (Camaro / Firebird) accessories setup (right)
Camaro balancer is 3/4” longer than the corvette.
97+ LS1 Y-body corvette accessories setup (left)
As you can see from the raised position of the A/C compressor on the corvette accessories it may be possible that this would eliminate the need to notch the frame cross member to use a LS1 A/C compressor.
Last updated: 9/22/2004
Last edited by 89 Iroc Z; 07-03-2009 at 06:21 PM.
01-26-2003, 12:49 PM
#4
Senior Member
Join Date: Apr 2001
Location: Diamondhead, MS
Posts: 940
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 20th Ann. TA
Engine: Turbo 3.8 V6
Transmission: 200 4R
Axle/Gears: 3.27
LS1 Edit will let you reprogram the computer any way you want it.
http://www.carputing.com
http://www.carputing.com
01-29-2003, 02:10 PM
#5
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Great post. According to my measurements John B. AC bracket will not clear the right side of the engine compartment. Your best bet is to notch the frame. This is the approach I am going with.
I measured the stock height of the car before the original engine was removed. I have yet to take measurements because the new engine is not installed. I am expecting the hight to increase by 3/4" I plan on getting lowering springs in the front to get the car back to stock height.
Alternative source for mounts wriring and brackets: www.hotrodlane.cc
The real problem I am going to be facing is the exhaust. I need to run cats because of emmissions testing and want to maintain ground clearence. All while maintaing maximum flow. Thanks to the tree huggers, I expect I will be spending 1000.00 for a custom fabricated exhaust.
I measured the stock height of the car before the original engine was removed. I have yet to take measurements because the new engine is not installed. I am expecting the hight to increase by 3/4" I plan on getting lowering springs in the front to get the car back to stock height.
Alternative source for mounts wriring and brackets: www.hotrodlane.cc
The real problem I am going to be facing is the exhaust. I need to run cats because of emmissions testing and want to maintain ground clearence. All while maintaing maximum flow. Thanks to the tree huggers, I expect I will be spending 1000.00 for a custom fabricated exhaust.
01-31-2003, 04:31 AM
#6
Member
Join Date: Jul 2002
Posts: 135
Likes: 0
Received 0 Likes
on
0 Posts
i wish i could steal the info on this site but check this out...
02-07-2003, 09:48 AM
#7
Senior Member
Join Date: Aug 2001
Location: garfield, nj
Posts: 838
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 Z28
Engine: 355 carbed
Transmission: t-5
The ls1 will fit under the stock hood.
Yes you do need to either fad new motor mounts or get in touch with 3rd gen resources.
YOu will either need to modify your existing cross member or purchase a new one since neither trans will bolt up to it.
Driveshaft i believe you can use the same one.
Guages will work. all of them
If your car came with a tpi engine you will not need to do much modification to your fuel system. a new fuel pump is probably a good idea to feed more fuel to the engine.
YOu will need a custom wiring harnes and a new computer from an ls1.
Since the engine is a lil bigger then the 3rd gen you will have to use the stock manifolds or fab your own headers somehow. the rest will fit since no changes are being made under the car.
The LS6 has a differnet cam setting and a couple different internals also the intake if its a 97-00 (97 being a vette)
Yes you can still use a/c but will need to be from the ls1.
I do not beleive the ls1 will raise your front end at all.
If you have any more questions just ask. im still in the process of saving the 10 g's for the engine and install from John at spreatech.com
he is verry helpful and sell the wiring harness you will need with the computer. Give him an e-mail and if hes not busy he will reply. thats where i got all my info from.
Chuck
Yes you do need to either fad new motor mounts or get in touch with 3rd gen resources.
YOu will either need to modify your existing cross member or purchase a new one since neither trans will bolt up to it.
Driveshaft i believe you can use the same one.
Guages will work. all of them
If your car came with a tpi engine you will not need to do much modification to your fuel system. a new fuel pump is probably a good idea to feed more fuel to the engine.
YOu will need a custom wiring harnes and a new computer from an ls1.
Since the engine is a lil bigger then the 3rd gen you will have to use the stock manifolds or fab your own headers somehow. the rest will fit since no changes are being made under the car.
The LS6 has a differnet cam setting and a couple different internals also the intake if its a 97-00 (97 being a vette)
Yes you can still use a/c but will need to be from the ls1.
I do not beleive the ls1 will raise your front end at all.
If you have any more questions just ask. im still in the process of saving the 10 g's for the engine and install from John at spreatech.com
he is verry helpful and sell the wiring harness you will need with the computer. Give him an e-mail and if hes not busy he will reply. thats where i got all my info from.
Chuck
Trending Topics
02-07-2003, 10:22 AM
#8
Junior Member
Join Date: Feb 2001
Location: Kiel, Wi
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 IROC-Z
Engine: 2002 LS6
Transmission: 6 speed
Axle/Gears: 4-11
Re: LS1 Question and answer
Originally posted by 89 Iroc Z
Q: Will the LS1 fit under the stock hood?
A: Yes, you will need to cut away at a support bracket for clearance of the alternator, see here: http://www.speartech.com/coproj-1991ls1.html
When I set up my motor, I arranged it so that I would not have to cut away the bracket.
Q: Do you need special motor mounts?
A: Yes, you can make your own or they may be for sale, check out this post: https://www.thirdgen.org/techbb2/sho...hreadid=143711
My website ( see link below) explains how to make your own brackets and has a pic of the brackets installed.
Q: What about the transmission cross member?
A: You will need a custom cross member for the Auto 4L60E or Manual T56 transmission. You can modify your stock cross member like this See Here if you are using the auto transmission.
If you are going with the T56 transmission you may be able to modify the cross member like above. Anyone know??? Or you can use aftermarket cross members like Steve Spohns.
I made my own cross member, but I would recommend using a factory one and modifying it to fit, I believe that Steve Spohns would work also
Q: Can you use your stock driveshaft with the LS1 T56 or auto transmission?
A: Yes
Stock will work, But I would recommend upgrading due to more torque, and HP.
Temp gauge:
The stock temperature gauge sending sensor can be mounted on the driver side head on the LS1.
http://www.montecarloss.com/ls1monte...s/TempInst.jpg
There is a spot on the passenger side cylinder head that you can put a sensor too.
At the time I did my swap the LS1 was too new, no gauge manufacturer made gauges that would work specifically with the LS1 computer. I decided to get a gauge cluster from a junkyard and put it in my dash ( some cutting to fit involved) and hook it up from there. the only problem I have is the fuel level gauge isn’t compatible this way. ( I installed my old fuel gauge above the cigarette lighter until I make a custom gauge cluster for my car.)
Q: Will I have to make my own fuel lines?
A: Yes, can be done with AN hose and AN fittings. Anyone know the AN fitting size of the LS1 fuel rail? Also you will need a Paxton fuel pressure regulator (model #???) which will give you the return line that the Camaro LS1 does not have. Or you may be able to use a fuel rail from a 97-98 corvette which has a fuel return line.
I just had a AN fitting welded to my fuel rail to make the install cleaner. I will have pics on my website soon. It is a -6 fuel line fitting.
Q: Will I need a new fuel pump?
A: You can use your stock fuel pump but I don’t think it will last very long running at the stock LS1 58 PSI. You are better off getting a high pressure fuel pump like the WALBRO GSS340M. You can get this pump with hot wire kit from http://www.racetronix.com/ for $170.
I have been using my stock 1987 fuel pump for 3 years now... no problems. I have almost 40,000 miles on my LS1 swap, everything has been great. I am going to be installing a new fuel pump soon, only because I am doing a heads and cam swap, and I don’t think the stock pump will be able to handle that kind of HP.
Q: What about the wiring harness?
A: You will need a LS1 wiring harness. Or you can buy one from painless http://www.painlesswiring.com/harness4.htm
I purchased a LS1 harness kit from this site http://www.wire-works.com/
Q: Won’t the computer trough a code without the LS1 gas tank pressure sensor?
A: Yes, correct me if I am wrong but you may be able to hook this sensor up by putting a “T” to the pressure relief valve pipe on your current gas tank.
I had the computer reprogrammed to delete this and some other
sensors (O2). ( LS1 Edit did not exist when I needed it)
Q: Will the stock exhaust system bolt up?
A: No, you will need to fabricate your own exhaust system. Also you will have to create 4 O2 bungs in the exhaust to mount the 4 oxygen sensors the computer needs. There may be a way to only use 2. Anyone shed some light on this?
O2 sims, or reprogram the computer to eliminate the back 2 o2s
Q: Is there any chip programming software or hardware for the LS1?
A:
TTA 1387: LS1 Edit will let you reprogram the computer any way you want it. http://www.carputing.com
- This option costs $550+
Or about $ 120 as an add on to someone else who already has it.
Q: Where do you mount the ECM?
A: Is the ECM watertight? If so then it could be mounted under the hood.
mine is mounted behind the driver’s seat, but eventually I am going to move it under the hood and rewire the whole thing.
Q: Can you still have A/C with an LS1?
A: Yes, you need to cut away at the engine cross member as shown here Click here. If you have good fabricating skills you could make a bracket like what was done here photo or Click here for info here. Which would allow you to mount the A/C compressor in the stock location. You will also need to you will have to fabricate your own AC Lines. Anyone know what type of pipe or hose you would use for this?
I did not install AC for weight reduction reasons. Once and a while I wish I had AC tho.
Q: Will the Lightweight LS1 raise the front end of my car a lot?
A: I believe so anyone have this problem?
I installed Eibach Pro lowering springs at the same time as the engine, I did notice that the front was a little higher than I thought it should be at first..... after a year or so I think it settled a little.
Helpful links:
http://www.montecarloss.com/ls1montecarloss/
http://www.speartech.com/coproj-1991ls1.html
http://www.fbody.com/members/LS1IROCZ1/
http://www.geocities.com/MotorCity/Downs/8158/iroc.html
http://www.ls1tech.com/
http://www.ls1info.com [/B]
Q: Will the LS1 fit under the stock hood?
A: Yes, you will need to cut away at a support bracket for clearance of the alternator, see here: http://www.speartech.com/coproj-1991ls1.html
When I set up my motor, I arranged it so that I would not have to cut away the bracket.
Q: Do you need special motor mounts?
A: Yes, you can make your own or they may be for sale, check out this post: https://www.thirdgen.org/techbb2/sho...hreadid=143711
My website ( see link below) explains how to make your own brackets and has a pic of the brackets installed.
Q: What about the transmission cross member?
A: You will need a custom cross member for the Auto 4L60E or Manual T56 transmission. You can modify your stock cross member like this See Here if you are using the auto transmission.
If you are going with the T56 transmission you may be able to modify the cross member like above. Anyone know??? Or you can use aftermarket cross members like Steve Spohns.
I made my own cross member, but I would recommend using a factory one and modifying it to fit, I believe that Steve Spohns would work also
Q: Can you use your stock driveshaft with the LS1 T56 or auto transmission?
A: Yes
Stock will work, But I would recommend upgrading due to more torque, and HP.
Temp gauge:
The stock temperature gauge sending sensor can be mounted on the driver side head on the LS1.
http://www.montecarloss.com/ls1monte...s/TempInst.jpg
There is a spot on the passenger side cylinder head that you can put a sensor too.
At the time I did my swap the LS1 was too new, no gauge manufacturer made gauges that would work specifically with the LS1 computer. I decided to get a gauge cluster from a junkyard and put it in my dash ( some cutting to fit involved) and hook it up from there. the only problem I have is the fuel level gauge isn’t compatible this way. ( I installed my old fuel gauge above the cigarette lighter until I make a custom gauge cluster for my car.)
Q: Will I have to make my own fuel lines?
A: Yes, can be done with AN hose and AN fittings. Anyone know the AN fitting size of the LS1 fuel rail? Also you will need a Paxton fuel pressure regulator (model #???) which will give you the return line that the Camaro LS1 does not have. Or you may be able to use a fuel rail from a 97-98 corvette which has a fuel return line.
I just had a AN fitting welded to my fuel rail to make the install cleaner. I will have pics on my website soon. It is a -6 fuel line fitting.
Q: Will I need a new fuel pump?
A: You can use your stock fuel pump but I don’t think it will last very long running at the stock LS1 58 PSI. You are better off getting a high pressure fuel pump like the WALBRO GSS340M. You can get this pump with hot wire kit from http://www.racetronix.com/ for $170.
I have been using my stock 1987 fuel pump for 3 years now... no problems. I have almost 40,000 miles on my LS1 swap, everything has been great. I am going to be installing a new fuel pump soon, only because I am doing a heads and cam swap, and I don’t think the stock pump will be able to handle that kind of HP.
Q: What about the wiring harness?
A: You will need a LS1 wiring harness. Or you can buy one from painless http://www.painlesswiring.com/harness4.htm
I purchased a LS1 harness kit from this site http://www.wire-works.com/
Q: Won’t the computer trough a code without the LS1 gas tank pressure sensor?
A: Yes, correct me if I am wrong but you may be able to hook this sensor up by putting a “T” to the pressure relief valve pipe on your current gas tank.
I had the computer reprogrammed to delete this and some other
sensors (O2). ( LS1 Edit did not exist when I needed it)
Q: Will the stock exhaust system bolt up?
A: No, you will need to fabricate your own exhaust system. Also you will have to create 4 O2 bungs in the exhaust to mount the 4 oxygen sensors the computer needs. There may be a way to only use 2. Anyone shed some light on this?
O2 sims, or reprogram the computer to eliminate the back 2 o2s
Q: Is there any chip programming software or hardware for the LS1?
A:
TTA 1387: LS1 Edit will let you reprogram the computer any way you want it. http://www.carputing.com
- This option costs $550+
Or about $ 120 as an add on to someone else who already has it.
Q: Where do you mount the ECM?
A: Is the ECM watertight? If so then it could be mounted under the hood.
mine is mounted behind the driver’s seat, but eventually I am going to move it under the hood and rewire the whole thing.
Q: Can you still have A/C with an LS1?
A: Yes, you need to cut away at the engine cross member as shown here Click here. If you have good fabricating skills you could make a bracket like what was done here photo or Click here for info here. Which would allow you to mount the A/C compressor in the stock location. You will also need to you will have to fabricate your own AC Lines. Anyone know what type of pipe or hose you would use for this?
I did not install AC for weight reduction reasons. Once and a while I wish I had AC tho.
Q: Will the Lightweight LS1 raise the front end of my car a lot?
A: I believe so anyone have this problem?
I installed Eibach Pro lowering springs at the same time as the engine, I did notice that the front was a little higher than I thought it should be at first..... after a year or so I think it settled a little.
Helpful links:
http://www.montecarloss.com/ls1montecarloss/
http://www.speartech.com/coproj-1991ls1.html
http://www.fbody.com/members/LS1IROCZ1/
http://www.geocities.com/MotorCity/Downs/8158/iroc.html
http://www.ls1tech.com/
http://www.ls1info.com [/B]
Last edited by LS1 IROCZ; 02-08-2003 at 12:00 PM.
02-08-2003, 10:06 AM
#9
Member
Join Date: Jun 2000
Location: All over Virginia
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
Re: Re: LS1 Question and answer
Originally posted by twiztidz28
Guages will work. all of them
I do not beleive the ls1 will raise your front end at all.
Guages will work. all of them
I do not beleive the ls1 will raise your front end at all.
Most cars that do the swap it raises the front. Taking 110lbs of the springs should let them sit a little easier. On G-body's it raises the front an inch to an inch and a quarter.
Lets try to keep the redundant post to a minimum.
LS1 IROCZ
Great post, hard to tell where you added info at first
Last edited by UVA3rdGen; 02-08-2003 at 10:55 AM.
02-08-2003, 11:18 AM
#10
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
LS1 IROC What Eibach lowering springs did you use? Is you car riding at the stock height?
BILL
BILL
Last edited by wm_sorg; 02-08-2003 at 11:20 AM.
02-08-2003, 11:58 AM
#11
Junior Member
Join Date: Feb 2001
Location: Kiel, Wi
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 IROC-Z
Engine: 2002 LS6
Transmission: 6 speed
Axle/Gears: 4-11
I cleaned up my post, made it easier to read, and added a few other items to it.
Bill: I installed the eibach pro kit 1" drop all around
weld the mounts....??? to the engine crossmember?
mine are bolted in....
if you want to weld them, bolt them in first, make sure everything is straight , then weld it.
I am not sure if this is what you were looking for or not.
Bill: I installed the eibach pro kit 1" drop all around
Originally posted by UVA3rdGen
Q. If you weld on the mounts, how do you ensure that the motor and tranny are on straight and true?
Q. If you weld on the mounts, how do you ensure that the motor and tranny are on straight and true?
mine are bolted in....
if you want to weld them, bolt them in first, make sure everything is straight , then weld it.
I am not sure if this is what you were looking for or not.
Last edited by LS1 IROCZ; 02-08-2003 at 12:20 PM.
02-08-2003, 10:02 PM
#12
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Thanks. Does the car sit level? I am worried that if I drop all around it will sit higher in the front. I am expecting the front to rise about an inch because of the lighter engine.
BILL
BILL
02-09-2003, 10:54 PM
#13
Member
Join Date: Jun 2000
Location: All over Virginia
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
LS1 IROCZ, i like how you fab'd the mounts. The other method I have seen is welding on a U-shaped mount onto a bolted in plate to accept the LS1 motor mounts. Same principle applies though, how did you know it was straight? Just line up the tranny mount in the crossmember and place the motor at an equal distant of each side of the engine cradle/front crossmember? That was what I was thinking, but would love any insight you used on proper motor placement.
02-13-2003, 12:36 AM
#14
02-14-2003, 04:57 PM
#15
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
03-09-2003, 12:53 AM
#16
Junior Member
Join Date: Jan 2003
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
I have read through much of the information that is listed here. I see that people that have done this swap are using stock exhaust manifolds. Does anyone know if there are headers that will work for this swap?
Andrew
Andrew
03-09-2003, 05:18 PM
#17
Junior Member
Join Date: Feb 2001
Location: Kiel, Wi
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 IROC-Z
Engine: 2002 LS6
Transmission: 6 speed
Axle/Gears: 4-11
My website has the phone number of SPS engines where I got my LS1 from. As far as I know they do not have a website.
Billy Grahms is also another salvage yard. when I find the link I'll post it here.
As far as headers.... my web site shows pics of mine...... hooker shorties. unless you go with custom made headers.Billy Grahms salvage
Billy Grahms is also another salvage yard. when I find the link I'll post it here.
As far as headers.... my web site shows pics of mine...... hooker shorties. unless you go with custom made headers.Billy Grahms salvage
Last edited by LS1 IROCZ; 03-16-2003 at 08:01 PM.
03-09-2003, 11:53 PM
#18
Junior Member
Join Date: Jan 2003
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
LS1 IROCZ,
Are you registered for the Road America Speed Seekers event? I will have my GTO there. Should be a great time.
So what your telling me is that Hooker short LS1 headers will work with this swap?
Andrew
Are you registered for the Road America Speed Seekers event? I will have my GTO there. Should be a great time.
So what your telling me is that Hooker short LS1 headers will work with this swap?
Andrew
03-10-2003, 08:20 PM
#19
I am seriously considering this swap for my 92 GTA. I would like to get the harness from http://www.speartech.com so that it will be plug-n-play with all of the existing stuff like their swap on the 91 Z28.
I also want to keep A/C. I would need to modify the K-Member as already shown and I would use the LS1 compressor corrcect?
My main concern is will I be able to use my 4L60? I just had it rebuilt (2 weeks ago!) and it was a performance rebuild so I can't just toss it, even selling it I would never get my money out of it. I had it build with all of the HD parts so it will handle 400 flywheel HP no problem, when I had it built I was planning a 406.
Is there anyone that makes a bracket for using a TV cable on an LS1 throttle body? I would of course swap in a 6-spd but not until my current trans goes out.
Also is there anyplace out there that makes pre-fabbed exhaust systems for LS1 thirdgen swaps? That would really make it ALLOT easier for a guy like me doing it in his garage who does not have welding equipment or even know how to weld...
Lastly and most importantly this would be CA smog legal as long as I keep everything correct right? I assume it is since it's a newer motor and I'll be keeping everything smog correct since I want it to look as factory as possible under the hood.
Oh, sorry 1 more thing, the LS1 will fit under my STB right?
I also want to keep A/C. I would need to modify the K-Member as already shown and I would use the LS1 compressor corrcect?
My main concern is will I be able to use my 4L60? I just had it rebuilt (2 weeks ago!) and it was a performance rebuild so I can't just toss it, even selling it I would never get my money out of it. I had it build with all of the HD parts so it will handle 400 flywheel HP no problem, when I had it built I was planning a 406.
Is there anyone that makes a bracket for using a TV cable on an LS1 throttle body? I would of course swap in a 6-spd but not until my current trans goes out.
Also is there anyplace out there that makes pre-fabbed exhaust systems for LS1 thirdgen swaps? That would really make it ALLOT easier for a guy like me doing it in his garage who does not have welding equipment or even know how to weld...
Lastly and most importantly this would be CA smog legal as long as I keep everything correct right? I assume it is since it's a newer motor and I'll be keeping everything smog correct since I want it to look as factory as possible under the hood.
Oh, sorry 1 more thing, the LS1 will fit under my STB right?
Last edited by 92GTA; 03-10-2003 at 08:34 PM.
03-10-2003, 09:26 PM
#20
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Nice firehawk!
Yes you will have to noch and fill the frame to use the LS1 compressor.
Unfortunately, there is no prefabbed exhaust for the LS1 thirdgen swap. The necessity for cats and ground clearence makes it that much more difficult and expensive.
I think it will be easier to convert your 4L60 to electronic rather than messing around with TV cables and PCM reprogramming.
I am not sure about STB clearence. I do not think it will present much of a problem for you.
BILL
Yes you will have to noch and fill the frame to use the LS1 compressor.
Unfortunately, there is no prefabbed exhaust for the LS1 thirdgen swap. The necessity for cats and ground clearence makes it that much more difficult and expensive.
I think it will be easier to convert your 4L60 to electronic rather than messing around with TV cables and PCM reprogramming.
I am not sure about STB clearence. I do not think it will present much of a problem for you.
BILL
03-10-2003, 09:39 PM
#22
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Let me know if you have any luck finding an exhaust solution. So it looks like I will spend a considerable amount on the exhaust.
03-10-2003, 09:44 PM
#23
Well I have worked with a guy I know how owns an exhaust shop (a one man operation), the guy is *** gift to people who need custom exhaust work! He does FANTASTIC work and what he charges is DIRT CHEAP! Problem for me is he's an hour away from me so I'd have to tow the car. I have no doubt he would be able to do and entire custom exhaust system including cats but it would be ALLOT easier if there was a pre-fab one I could buy...
03-10-2003, 10:02 PM
#24
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
When I lived in OH I knew a guy like that. It was unbelievable to watch him bend pipe. No I am in VA and have not been able to locate a good fab guy. Too bad you are not further along we could have had him fab to at the same time.
03-14-2003, 06:48 PM
#26
TGO Supporter
Join Date: Nov 2002
Location: Puerto Rico
Posts: 316
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 IROC Convertible
Engine: 305 TPI
Transmission: Auto
ls1 swap headers
I just saw this on the thirdgenresource web site. They claim JBA ls1 heades work with their swap kit.
03-14-2003, 07:08 PM
#27
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Yeah. I saw those yesterday. I also found out they are making prefabricated motor and tail mounts for LS1 swaps. When I brought mine from them they were raw plates of steel and straps that needed to be welded after test fitting. Go figure!
I am going to stay away from headers for a while. I plan on making up the flow on the back end. If I recall they were asking almost $700 for them. Not really worth it in my opinion.
I am going to stay away from headers for a while. I plan on making up the flow on the back end. If I recall they were asking almost $700 for them. Not really worth it in my opinion.
03-14-2003, 07:58 PM
#28
TGO Supporter
Join Date: Nov 2002
Location: Puerto Rico
Posts: 316
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 IROC Convertible
Engine: 305 TPI
Transmission: Auto
ls1 headers
I agree, very expensive. But that's one of the downfalls of the ls1. Parts are usually expensive. Any way, if you're really interested, I think I saw a set on eBay for about $450. They may be a different material though.
03-14-2003, 08:10 PM
#29
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Thanks. I hear hooker shotries will work too. Right now I am trying to decide whether to with Hotchkiss or Ebiach springs. Know anywhere I can get information on spring rates?
03-14-2003, 08:18 PM
#30
TGO Supporter
Join Date: Nov 2002
Location: Puerto Rico
Posts: 316
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 IROC Convertible
Engine: 305 TPI
Transmission: Auto
spring rates
I don't know for certain but I would bet that the manufacturer's web sites would have those specs.
03-14-2003, 08:40 PM
#31
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
I need to go back to those sites and check again. All I saw was drop specs.
Here is my third attempt at posting a picture
Here is my third attempt at posting a picture
03-15-2003, 05:33 AM
#32
TGO Supporter
Join Date: Nov 2002
Location: Puerto Rico
Posts: 316
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 IROC Convertible
Engine: 305 TPI
Transmission: Auto
Spring rates
The picture worked. Maybe you answered this before but from what I see you have a ton of room on the passenger side. This you have clearance problems with the coil packs like the Speartech people did?
About the springs, go here http://www.eibach.com/index1.htm Then go to Technical Support, then FAQ. They may not have the exact info you're looking for but there's some info and they have phone numbers you could call.
For Hotchkis go here https://www.hotchkis.net/secure_index.html Then Why Buy Hotchkis? Then FAQ and Tech questions, the have the rates listed. Here they are.
4) What are the spring rates for the Hotchkis Performance spring sets? (truck rates not listed)
_
PART # YEAR/BODY RATE F/R
#1900 ‘64-’67 A Body 520/135
#1901 ’68-’72 A Body 520/135
#1902 ‘78-’88 A/G Body 600/135
#1903 ‘82-’92 F Body 600/100-140
#1904 (V8)_ ‘93-’99 F Body(progressive) F 285-525
R 100-140
#1905 (V6)_ ‘93-’99 F Body(progressive) F 285-525
R 100-140
#1907 (front only)_ ‘67-’69 F Body F 600
‘68-’74 X Body
About the springs, go here http://www.eibach.com/index1.htm Then go to Technical Support, then FAQ. They may not have the exact info you're looking for but there's some info and they have phone numbers you could call.
For Hotchkis go here https://www.hotchkis.net/secure_index.html Then Why Buy Hotchkis? Then FAQ and Tech questions, the have the rates listed. Here they are.
4) What are the spring rates for the Hotchkis Performance spring sets? (truck rates not listed)
_
PART # YEAR/BODY RATE F/R
#1900 ‘64-’67 A Body 520/135
#1901 ’68-’72 A Body 520/135
#1902 ‘78-’88 A/G Body 600/135
#1903 ‘82-’92 F Body 600/100-140
#1904 (V8)_ ‘93-’99 F Body(progressive) F 285-525
R 100-140
#1905 (V6)_ ‘93-’99 F Body(progressive) F 285-525
R 100-140
#1907 (front only)_ ‘67-’69 F Body F 600
‘68-’74 X Body
03-16-2003, 05:21 PM
#33
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Thanks for the help. Funny you mention speartech. Thats where the car is right now.
Although there is a fair amount of room, the coil packs only need an extra 1/4 or so to clear the a/c ficture. Rather than cutting ahd hacking the relocation bracked from the truck engine is a better solution.
Some of the 4th gen guys are relocatong their coil packs near the firewall by using some kit. I do not know what the advantage is, but this could be another option for 3rd gen LS1 swappers.
Although there is a fair amount of room, the coil packs only need an extra 1/4 or so to clear the a/c ficture. Rather than cutting ahd hacking the relocation bracked from the truck engine is a better solution.
Some of the 4th gen guys are relocatong their coil packs near the firewall by using some kit. I do not know what the advantage is, but this could be another option for 3rd gen LS1 swappers.
04-05-2003, 06:47 PM
#34
Junior Member
Join Date: Apr 2003
Location: Englewood, OH
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
exhaust
Ok, I know it's a long way off, but a friend of mine is custom making a true dual exhaust for when I put the LS1/6 in the camaro I'm building (that is, if I'm so lucky to get one 
). I'll definately be sure to keep all of our specs and have him weld a few extra to sell on ebay or something, since he loves to weld. 
). I'll definately be sure to keep all of our specs and have him weld a few extra to sell on ebay or something, since he loves to weld. 
04-17-2003, 04:51 PM
#37
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
You have several options. If I were you I would buy the mounts. They are now available from thridgenresource and street and performance.
I had the raw meterials from thirdgenresource because they were not producing them finished at the time. The engine had to be test fitted and the u-straps were tack welded once the engine was trued up. Of course they were available a few weeks all this.
If you are going to run A/C you are better off with the thirdgenresource mounts. Street and performance offers a relocation bracket that lets you use the stock mounts. However, I am not sure the will let the compressor clear if you keep it in the stock location.
I had the raw meterials from thirdgenresource because they were not producing them finished at the time. The engine had to be test fitted and the u-straps were tack welded once the engine was trued up. Of course they were available a few weeks all this.
If you are going to run A/C you are better off with the thirdgenresource mounts. Street and performance offers a relocation bracket that lets you use the stock mounts. However, I am not sure the will let the compressor clear if you keep it in the stock location.
04-21-2003, 12:54 AM
#38
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Costal Alabama
Posts: 2,136
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Iroc-Z
Engine: 350, ZZ4 equivalent
Transmission: Pro-Built Road Race 700R4
Axle/Gears: 3.23 Dana 44
Originally posted by wm_sorg
Street and performance offers a relocation bracket that lets you use the stock mounts. However, I am not sure the will let the compressor clear if you keep it in the stock location.
Street and performance offers a relocation bracket that lets you use the stock mounts. However, I am not sure the will let the compressor clear if you keep it in the stock location.
04-21-2003, 07:48 AM
#39
Junior Member
Join Date: Jan 2003
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
04-21-2003, 07:32 PM
#40
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Costal Alabama
Posts: 2,136
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Iroc-Z
Engine: 350, ZZ4 equivalent
Transmission: Pro-Built Road Race 700R4
Axle/Gears: 3.23 Dana 44
Street and Performance
I wasn’t able to find on the site where they sell motor mounts made for 3rd gens. I went through their online catalog too.
EVERYWHRE on the site they refer to the 98-02 LS1 F-body as the "IROC\TA". They don't seem to realize that the new Camaro’s are not IROCs.
EVERYWHRE on the site they refer to the 98-02 LS1 F-body as the "IROC\TA". They don't seem to realize that the new Camaro’s are not IROCs.
Last edited by 89 Iroc Z; 04-21-2003 at 07:41 PM.
04-21-2003, 08:30 PM
#41
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
The site is a little funky. You can not link straight to the page. In the online catalouge the mounts are on page 64. Under LS1/6 motor mount plates. They also have a page dedicated to the installing an LS1 into a 69 camaro. It shows the plates there.
04-28-2003, 11:50 AM
#42
Junior Member
Join Date: Feb 2001
Location: Kiel, Wi
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 IROC-Z
Engine: 2002 LS6
Transmission: 6 speed
Axle/Gears: 4-11
I have a new Y-pipe in place on my car. all mandrel bends, oval tube, more ground clearance, and no CATS :lala:
I had to up grade my fuel system under the hood. The factory fuel rails could not support the horsepower any more. So, aftermarket fuel rails and redo everything fuel related under the hood.
these are links to the f-body site, so you have to copy and paste the address on your browser.
http://www.fbody.com/members/LS1IROCZ1/045newfuelrails1.jpg
http://www.fbody.com/members/LS1IROCZ1/046newfuelrails2.jpg
here are the long awaited pics of the y pipe. (sorry It took so long to get them online)
Better ground clearance:
http://www.fbody.com/members/LS1IROCZ1/DSC01892.jpg
view from front:
http://www.fbody.com/members/LS1IROCZ1/DSC01885.jpg
view from drivers side:
http://www.fbody.com/members/LS1IROCZ1/DSC01886.jpg
drivers side:
http://www.fbody.com/members/LS1IROCZ1/DSC01888.jpg
passengers side:
http://www.fbody.com/members/LS1IROCZ1/DSC01887.jpg
the "Y":
http://www.fbody.com/members/LS1IROCZ1/DSC01889.jpg
I had to up grade my fuel system under the hood. The factory fuel rails could not support the horsepower any more. So, aftermarket fuel rails and redo everything fuel related under the hood.
these are links to the f-body site, so you have to copy and paste the address on your browser.
http://www.fbody.com/members/LS1IROCZ1/045newfuelrails1.jpg
http://www.fbody.com/members/LS1IROCZ1/046newfuelrails2.jpg
here are the long awaited pics of the y pipe. (sorry It took so long to get them online)
Better ground clearance:
http://www.fbody.com/members/LS1IROCZ1/DSC01892.jpg
view from front:
http://www.fbody.com/members/LS1IROCZ1/DSC01885.jpg
view from drivers side:
http://www.fbody.com/members/LS1IROCZ1/DSC01886.jpg
drivers side:
http://www.fbody.com/members/LS1IROCZ1/DSC01888.jpg
passengers side:
http://www.fbody.com/members/LS1IROCZ1/DSC01887.jpg
the "Y":
http://www.fbody.com/members/LS1IROCZ1/DSC01889.jpg
Last edited by LS1 IROCZ; 06-14-2003 at 09:21 AM.
04-29-2003, 09:49 AM
#43
Senior Member
Join Date: Dec 1999
Location: Annandale, VA
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
That would be great. I would love to see the new y-pipe. I am getting ready to have mine done soon.
05-29-2003, 08:24 AM
#44
Junior Member
Join Date: May 2003
Posts: 41
Likes: 0
Received 0 Likes
on
0 Posts
Speedo Problem
Just a quick note, to recalibrate your electronic speedo, go to this website <http://www.atrol.com> and check out the "ERA" (electronic ratio adaptor) I bought one for my T/A ($145.00) after a gear change, but have not installed it yet. I will keep you posted
06-10-2003, 07:41 PM
#45
TGO Supporter
Join Date: Jan 2001
Location: Mesa, AZ
Posts: 957
Likes: 0
Received 0 Likes
on
0 Posts
Ok, I have a few questions for you guys. I don't plan on driving my car for quite some time as its down for a complete do-over. I just completed my harness from the 165maf to the 749(sy/ty) ecm but now I'm really considering this swap.
I was planning on swapping in a 4th gen dash into the car in the future also. If I was to buy a wrecked ls1 TA or formula would it be safe to say that I could swap in the engine/tranny/ecm along with the dash/guages and fuse block and basically just transfer everything over without 'too' much trouble. I know it would take some work but are there a lot of little things I'm not thinking about that wouldn't make swapping out the dash,wiring,etc pretty much straight forward? Also couldn't you swap in the gas tank (if possible) and use it since it has the better fuel pump. Since you would be using the ls1 wiring/guages it should also pretty much a straight forward thing also?
I'm not expecting this to be some 'easy' task, just wanna make sure my line of thinking is straight. Even if its harder than I'm thinking I might tackle this anyways.
Also anyone know the differences between the t56's? I already have a lt1 t56 in the car, so I have all the stuff there already. I know the bolt pattern is different. Do they use the same clutches, shifters, etc? Also if the hydraulic clutch setup the same? Any help will be greatly appreciated. Thanks in advance guys.
I was planning on swapping in a 4th gen dash into the car in the future also. If I was to buy a wrecked ls1 TA or formula would it be safe to say that I could swap in the engine/tranny/ecm along with the dash/guages and fuse block and basically just transfer everything over without 'too' much trouble. I know it would take some work but are there a lot of little things I'm not thinking about that wouldn't make swapping out the dash,wiring,etc pretty much straight forward? Also couldn't you swap in the gas tank (if possible) and use it since it has the better fuel pump. Since you would be using the ls1 wiring/guages it should also pretty much a straight forward thing also?
I'm not expecting this to be some 'easy' task, just wanna make sure my line of thinking is straight. Even if its harder than I'm thinking I might tackle this anyways.
Also anyone know the differences between the t56's? I already have a lt1 t56 in the car, so I have all the stuff there already. I know the bolt pattern is different. Do they use the same clutches, shifters, etc? Also if the hydraulic clutch setup the same? Any help will be greatly appreciated. Thanks in advance guys.
06-14-2003, 09:31 AM
#46
Junior Member
Join Date: Feb 2001
Location: Kiel, Wi
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 IROC-Z
Engine: 2002 LS6
Transmission: 6 speed
Axle/Gears: 4-11
as far as wiring a 4th gen dash in a 3rd gen, it would be very easy. I have a 4th gen gauge cluster in my 3rd gen dash(temporary).
I don't know how well a 4th gen dash would fit in the car, but it does sound interesting.
The t56: I think that the LT1 has different hydraluics, therefore it needs a different clutch also. ( can anyone back me up on this?)
The external housing is very similar, except for the bolt pattern of the bell housing.
I don't know how well a 4th gen dash would fit in the car, but it does sound interesting.
The t56: I think that the LT1 has different hydraluics, therefore it needs a different clutch also. ( can anyone back me up on this?)
The external housing is very similar, except for the bolt pattern of the bell housing.
06-15-2003, 07:59 PM
#47
TGO Supporter
Join Date: Jan 2001
Location: Mesa, AZ
Posts: 957
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the reply. Concering the dash swap it has been done several times. Here are some links with pics if you want to check it out.
https://www.thirdgen.org/techbb2/sho...light=4th+dash
http://www.cardomain.com/member_page...=283851&page=6
https://www.thirdgen.org/techbb2/sho...light=4th+dash
https://www.thirdgen.org/techbb2/sho...hreadid=170176
I just wasn't sure if I could transfer all the wiring over completely and have everything just work or if I would have to mess with a lot of little things. I imagine if you swapped all the wiring over though most everything would be a plug and play. Although there would be some splicing to do here and there with accessories and stuff.
Concering the T56 I wasn't sure if I could keep the same clutch and hydraulic setup or if I should just go ahead and sell if with the T56 if thats what I decide to do.
Brandon
https://www.thirdgen.org/techbb2/sho...light=4th+dash
http://www.cardomain.com/member_page...=283851&page=6
https://www.thirdgen.org/techbb2/sho...light=4th+dash
https://www.thirdgen.org/techbb2/sho...hreadid=170176
I just wasn't sure if I could transfer all the wiring over completely and have everything just work or if I would have to mess with a lot of little things. I imagine if you swapped all the wiring over though most everything would be a plug and play. Although there would be some splicing to do here and there with accessories and stuff.
Concering the T56 I wasn't sure if I could keep the same clutch and hydraulic setup or if I should just go ahead and sell if with the T56 if thats what I decide to do.
Brandon
08-08-2003, 04:48 PM
#49
Supreme Member
Join Date: Jan 2001
Location: www.thirdgentech.com
Posts: 1,609
Likes: 0
Received 0 Likes
on
0 Posts
Car: 2004 GTO
Engine: LS1
Transmission: T-56
Will SLP longtubes fit in a 3rdgen LS1 swap?
I have a 1984 Trans Am that will be getting the swap over the winter. I also have SLP longtubes in stock that might just work.
Has anyone tried them?
I have a 1984 Trans Am that will be getting the swap over the winter. I also have SLP longtubes in stock that might just work.
Has anyone tried them?
08-09-2003, 01:15 AM
#50
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Costal Alabama
Posts: 2,136
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Iroc-Z
Engine: 350, ZZ4 equivalent
Transmission: Pro-Built Road Race 700R4
Axle/Gears: 3.23 Dana 44
I was wondering the same thing; I never found an answer though, like many of my questions about the swap. Ideally I would like to do long tubes and notch the frame as seem here: https://www.thirdgen.org/techbb2/sho...hreadid=177167