upgrade to HSR?
#101
Supreme Member
iTrader: (20)
Re: upgrade to HSR?
You really need to moove that temp sensor off of the plenum entirely. When I had a HSR and was datalogging I never recieved the true air temp because the sensor was heat soaked. Get a intake set up from a v-6 or maf car,delete the replace the maf with a pvc pipe and put the air temp sensor in the location that is by the air filters. The closest temp I could get when I had the sensor in the plenum was 20* off.
I think i got the same problem with my single plane now. I have the 89 MAF system IAT sensor in the runner of the manifold and it reads the same temp just about, no matter what happens... I think it is picking up the surrounding radiant heat
#102
Senior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2003
Location: St. Louis, Missouri
Posts: 988
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: upgrade to HSR?
Does anyone have a pic of the IAT relocated?
I did some searching and it seems that relocating causes the computer to read the air temp more accurately thus allowing for about a 2mpg increase in fuel economy.
Not sure if it does anything for performance (HP/TQ)?
I did some searching and it seems that relocating causes the computer to read the air temp more accurately thus allowing for about a 2mpg increase in fuel economy.
Not sure if it does anything for performance (HP/TQ)?
Last edited by formula_novice; 12-17-2009 at 01:24 PM.
#103
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
The IAT is mostly responsible for the EGR working, and if you don't have one, then it won't matter. If you have a MAF sensor, it also reads the temp, along with airflow, and is mostly responsible for Advancing the timing. My car runs great, and I have my IAT in the bottom center hole of the plenum. But Next time I take off my HSR, which will be soon, to go back to the other head gaskets; On the bottom of the HSR, there are 4-bosses from the casting. I'm going to drill, and tap them for 1/4-20" bolts, and put a piece of sheet metal on the bottom of the intake, this way it will stop the oil from splashing up on the bottom of the intake runners, it shouldn't be that much splash, but thats mostly why the intake is getting heat soaked. So when I do it, I'll definitelly post that also. I just didn't feel like doing it when I put the intake on.
#105
Senior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2003
Location: St. Louis, Missouri
Posts: 988
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: upgrade to HSR?
Thanks!
#106
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
wrong post
#107
Supreme Member
iTrader: (15)
Re: upgrade to HSR?
I'm going to drill, and tap them for 1/4-20" bolts, and put a piece of sheet metal on the bottom of the intake, this way it will stop the oil from splashing up on the bottom of the intake runners, it shouldn't be that much splash, but thats mostly why the intake is getting heat soaked. So when I do it, I'll definitelly post that also. I just didn't feel like doing it when I put the intake on.
#108
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
Well its funny man that u say that. Because compared to my old Ported TPI intake, it was practically outside ambient air temperature after driving for a while regardless of outside temp. If you just sit and idle, then of course the intake gets even hotter, but if you drive, it stays nice and cool. I even have a hood with a scoop in it, so it cools it off even more, but I took out the scoop for now, so people can see the aftermarket HSR intake setup; I mean its basically a fuel injected dual quad intake.
I have better than stock heads, world sportsman II's, an 51% underdrive crank pulley along with a Edelbrock water pump, so it cools better than it does from the factory, I also have an aluminum radiator, and I hardly ever even use the fans on the radiator, unless I'm in backed up traffic.
The whole point of this metal on the bottom of the intake, is to shield it from the hot oil, because oil can aprroach 275 F* in the motor. I don't use the stock ghetto oil cooler anymore either, because I needed the room for my long tube headers, so yes the shield will help. But the hot coolant, in my engine stays right around 160 F* so thats not an issue, its only in the very front of the intake, theres some room in between the runners and the coolant passage way, so it isn't an issue.
I'm probably going back to the Felpro 501-sd head gaskets this spring, because these GM gaskets I used that are .028 instead of the 501's .041, missing two lower cylinder head holes in the gaskets, the motor runs hotter, and it does heat soak the intake, so they have to go. I just wasted money on these gaskets, that were supposed to be great. But when you want higher compression, you have more heat to deal with anyway, so I guess I'm just being picky. But every 10 F* cooler, is one more horsepower in the intake tract, as the air is more denser, so more power!
I have better than stock heads, world sportsman II's, an 51% underdrive crank pulley along with a Edelbrock water pump, so it cools better than it does from the factory, I also have an aluminum radiator, and I hardly ever even use the fans on the radiator, unless I'm in backed up traffic.
The whole point of this metal on the bottom of the intake, is to shield it from the hot oil, because oil can aprroach 275 F* in the motor. I don't use the stock ghetto oil cooler anymore either, because I needed the room for my long tube headers, so yes the shield will help. But the hot coolant, in my engine stays right around 160 F* so thats not an issue, its only in the very front of the intake, theres some room in between the runners and the coolant passage way, so it isn't an issue.
I'm probably going back to the Felpro 501-sd head gaskets this spring, because these GM gaskets I used that are .028 instead of the 501's .041, missing two lower cylinder head holes in the gaskets, the motor runs hotter, and it does heat soak the intake, so they have to go. I just wasted money on these gaskets, that were supposed to be great. But when you want higher compression, you have more heat to deal with anyway, so I guess I'm just being picky. But every 10 F* cooler, is one more horsepower in the intake tract, as the air is more denser, so more power!
#109
Senior Member
Join Date: Sep 2002
Location: Nebraska
Posts: 835
Likes: 0
Received 9 Likes
on
9 Posts
Car: '89 Formula
Engine: 355
Transmission: 700R4
Axle/Gears: 9 bolt
Re: upgrade to HSR?
Did you try any of the suggestions? Do you have a finished photo?
#110
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
I'm pulling my trans out for now, putting a 3000 stall with a anti-balloon plate, installing my 91 GTA aluminum driveshaft next week. Then pulling the heads, putting the new 501SD's back on, because they are better. Cools better and barely any difference in compression. Then putting that plate on the bottom my HSR! Then if money permits, I'll do the cam swap, but if not, I'll retard the cam 4* from straight up to make more power up top to help the HSR.
#113
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
You really have to tune the motor, because where the HSR makes peak HP, the stock tune delivers a lot less fuel, so when it seems like its pretty good in the seat of the pants, its not as good as it could be, get a Fast Chip tune!
#114
Member
Join Date: Jan 2008
Posts: 249
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 310 HSR, TFS heads, zz4 cam
Transmission: T5
Axle/Gears: 9 bolt 3:70
Re: upgrade to HSR?
do you think the hsr will make a big difference with a 305 .030 over, zz4 cam, headers, 3" y-pipe and all the way out, no cats and spiral flow muffler?
#115
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
The stock TPI intake was built and designed for a 305. Using a HSR on a 305 would kill most of its torque, but with the right cam, it would probably work pretty good, but you'd have to stay with some 1-5/8" headers to help keep its torque down low and you'd want to run at least a 3000 stall.
I wouldn't switch the intakes, just do some work to the stock TPI setup, like better runners, maybe some bowl blending of the heads, along with some port matching/port work and a healthy cam, headers and exhaust, and of course a tune, thats really all you need to do to see a huge difference in a 305.
I wouldn't switch the intakes, just do some work to the stock TPI setup, like better runners, maybe some bowl blending of the heads, along with some port matching/port work and a healthy cam, headers and exhaust, and of course a tune, thats really all you need to do to see a huge difference in a 305.
#116
Member
Join Date: Jan 2008
Posts: 249
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 310 HSR, TFS heads, zz4 cam
Transmission: T5
Axle/Gears: 9 bolt 3:70
Re: upgrade to HSR?
i already bought the HSR and have tuning equipment plus i have a T5 and 3:70 gears.. im thinking this should be optimal for the quarter?
#117
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
that should work good, but the HSR is more geared towards use on a bigger cubic inch motor, so the 305 will have to scream. The biggest reason the 305 doesn't make that great of power, is the 3.75" bore, which hurts the airflow. Thats why the old chevy 302's kicked so much ***, it had a shorter stroke, but the same 4.00" bore, so it breathed great. Forced induction is really needed to wake a 305 up even more.
#118
Senior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2003
Location: St. Louis, Missouri
Posts: 988
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: upgrade to HSR?
Well guys, I've decided to go back to a LTR TPI setup.
I figured with my combo, I would still have plenty of torque to spin the tires and have fun.
But since installing the HSR, my car just isn't fun to drive around town anymore. The lack of bottom-end/mid torque has made driving the car really boring.
I sent TPIS a data log and they say the chip is ok. I've also played with the timing and fuel pressure hoping to "wake her up" but no luck.
Unfortunately my budget has been pretty depleted so I might have to run the stock runners for a little while until I can afford another set of LTR's.
Thanks again for all the help during my project!
I figured with my combo, I would still have plenty of torque to spin the tires and have fun.
But since installing the HSR, my car just isn't fun to drive around town anymore. The lack of bottom-end/mid torque has made driving the car really boring.
I sent TPIS a data log and they say the chip is ok. I've also played with the timing and fuel pressure hoping to "wake her up" but no luck.
Unfortunately my budget has been pretty depleted so I might have to run the stock runners for a little while until I can afford another set of LTR's.
Thanks again for all the help during my project!
#119
Senior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2003
Location: St. Louis, Missouri
Posts: 988
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: upgrade to HSR?
In a last moment effort, I bumped the timing up to 14* and the car responded a little better down low. Not TPI torque but better.
However when I was manually shifting up the gears, around 5000rpm the tach seemed to stagger and the car felt like it cut-out. Any ideas what would cause this?
Thanks guys!
However when I was manually shifting up the gears, around 5000rpm the tach seemed to stagger and the car felt like it cut-out. Any ideas what would cause this?
Thanks guys!
#120
Member
Join Date: Jan 2008
Posts: 249
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 310 HSR, TFS heads, zz4 cam
Transmission: T5
Axle/Gears: 9 bolt 3:70
Re: upgrade to HSR?
fuel pressure problem possibly.. read through this..
http://www.gmhightechperformance.com...roc/index.html
http://www.gmhightechperformance.com...roc/index.html
Last edited by Nater36; 05-20-2010 at 10:54 AM.
#121
Supreme Member
iTrader: (7)
Join Date: Jul 2000
Location: Prince George, BC, Canada
Posts: 2,047
Likes: 0
Received 2 Likes
on
2 Posts
Car: 89 GTA
Engine: 5.7L Supercharged
Transmission: T-56
Axle/Gears: Moser 9" 3.70
Re: upgrade to HSR?
Probably your knock sensor setting off causing your car to retard timming, think 14* might be little much.
#122
Senior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2003
Location: St. Louis, Missouri
Posts: 988
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: upgrade to HSR?
Hi Guys,
I finally got the car out and running around 5k to do a data log (attached as a txt file - rename to .csv and open in excel). I bumped the timing down to 12*. It looks like it is running just a little lean around 5k but nothing too bad. Any ideas?
Also, I had the tranny in 1st when I did this run. When i got to around 5200rpm-ish, the tranny seemed to shift gears to 2nd even though i didn't manually upshift?
ANY info would be greatly appreciated.
Thanks!
I finally got the car out and running around 5k to do a data log (attached as a txt file - rename to .csv and open in excel). I bumped the timing down to 12*. It looks like it is running just a little lean around 5k but nothing too bad. Any ideas?
Also, I had the tranny in 1st when I did this run. When i got to around 5200rpm-ish, the tranny seemed to shift gears to 2nd even though i didn't manually upshift?
ANY info would be greatly appreciated.
Thanks!
#125
Senior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2003
Location: St. Louis, Missouri
Posts: 988
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: upgrade to HSR?
Guys, I finally stuck the FP gauge on the hood and took the car for a spin. The car was showing between 40-42psi of fuel (it was normally around 42 but would sometimes be a little lower).
I stepped on the gas in first gear all the way to about 5200rpm. The gauge was steady at 42psi at 5200. I'm assuming this means my fuel pump is ok?
I decided to take the vacuum line off the FP regulator and it showed, at idle, about 48psi. I bumped it up to 50psi but haven't taken it out yet to see if this helps. I also plan to bump the timing down a little more to 10*.
Do these readings sound ok? Any thoughts?
Thanks!
I stepped on the gas in first gear all the way to about 5200rpm. The gauge was steady at 42psi at 5200. I'm assuming this means my fuel pump is ok?
I decided to take the vacuum line off the FP regulator and it showed, at idle, about 48psi. I bumped it up to 50psi but haven't taken it out yet to see if this helps. I also plan to bump the timing down a little more to 10*.
Do these readings sound ok? Any thoughts?
Thanks!
#126
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
I sent my regulator back to holley and had it replaced, so I have a new one. I'm putting it in tomorrow, and I'm going to try and get my new BBK/Walbro 255 lph fuel pump in, then I can go ahead and get my fyrbird back on the road! The car shows/cruise nights have already started. So along with my driveshaft loop, new trans mount, 3000 stall, holds to 2400 on the foot break, aluminum '91 GTA aluminum driveshaft, this cars ready to rock. All I need soon is 5point seat harness's and a 8 point cage and some nitrous!
As for your question, what fuel injectors are you running?
As for your question, what fuel injectors are you running?
Last edited by cronsformula350; 05-28-2010 at 01:27 AM. Reason: fuel presssure comment
#127
Member
Join Date: Jan 2008
Posts: 249
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 310 HSR, TFS heads, zz4 cam
Transmission: T5
Axle/Gears: 9 bolt 3:70
Re: upgrade to HSR?
have you tried it yet? any differences? too much timing and not enough fuel could give your symptoms..
#128
Member
Join Date: May 2010
Location: Houston Area
Posts: 463
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-Z
Engine: 355, 6.0 (LQ4) soon
Transmission: 700R4
Axle/Gears: Borg Warner 2.77 for now
Re: upgrade to HSR?
The trottle linkage does hit the cross over tube, easy fix tho, slightly bend linkage so it clears without the chance of getting stuck open. I finally put enough miles on my engine to let loose on the throttle and all I have to say is, whatever you lose down low is nothing when compared to the gain up top. It pulled very hard all the way to 6k. If its just a weekend car and you dont race it, leave it alone. To truly enjoy a hsr you have to drive it daily. You only go to 4k so the tpi will be more than enough to handle your needs
#130
Member
Join Date: May 2010
Location: Houston Area
Posts: 463
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-Z
Engine: 355, 6.0 (LQ4) soon
Transmission: 700R4
Axle/Gears: Borg Warner 2.77 for now
Re: upgrade to HSR?
My timings set at 8* and the fuel pressures @ 46psi. Swap out your ignition control module and see I theres a difference there, those things only work when they want to. Try running a bigger spark gap or step up to hotter plugs. We have similar set-ups and I have tons of torque and pulls cleanly all the way to 6k so yours shouldnt be falling on its face. My computer hasnt been tuned and its working out pretty nice, cant wait to get a custom chip and hammer it
#131
Senior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2003
Location: St. Louis, Missouri
Posts: 988
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: upgrade to HSR?
Thanks for the advice Stealthroc89! So yours is running great with just the factory chip? I thought about putting my factory chip back in and trying it but figured it would make things worse?
#132
Member
Join Date: May 2010
Location: Houston Area
Posts: 463
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-Z
Engine: 355, 6.0 (LQ4) soon
Transmission: 700R4
Axle/Gears: Borg Warner 2.77 for now
Re: upgrade to HSR?
You can also try getting your chip burnt to fit the needs of the HSR, if you havent already. Yep, runs great with the stock chip, the only thing I dont like is it takes 5 seconds of cranking to get it started.
#133
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
umm...wow, you guys don't run enough base timing, I run 16-17* of timing, or almost just enough advance, before it detonates, you almost always feel a seat of the pants difference with a v8, however with 6 bangers or 5 cylinders, it may cost you some midrange power.
Try advancing the timing, 2-3* at a time, or until you start feeling no difference in the seat of the pants. Also your fuel pressure usually always makes more power, until you run too much fuel off the line, that it bogs. However, with a TPI stock intake, the bog off the line helps with traction problems, then cleans up enough to not be a problem when your in the gas. Also some injectors flow well with certain pressure, the best thing to do, is contact the manufacturer on what PSI usually has the best spray pattern, but it can be turned to high, and run pig rich.
Try advancing the timing, 2-3* at a time, or until you start feeling no difference in the seat of the pants. Also your fuel pressure usually always makes more power, until you run too much fuel off the line, that it bogs. However, with a TPI stock intake, the bog off the line helps with traction problems, then cleans up enough to not be a problem when your in the gas. Also some injectors flow well with certain pressure, the best thing to do, is contact the manufacturer on what PSI usually has the best spray pattern, but it can be turned to high, and run pig rich.
#134
Member
Join Date: May 2010
Location: Houston Area
Posts: 463
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-Z
Engine: 355, 6.0 (LQ4) soon
Transmission: 700R4
Axle/Gears: Borg Warner 2.77 for now
Re: upgrade to HSR?
I have the timing low for a bit more torque, on the weekends a advance it for better power up high, but it runs great either way, it may be @ 10* I'm not sure what I set it at last
#135
Supreme Member
iTrader: (20)
Re: upgrade to HSR?
The car seemed to pull better to about 5500rpm but then maxed out
umm...wow, you guys don't run enough base timing, I run 16-17* of timing, or almost just enough advance, before it detonates, you almost always feel a seat of the pants difference with a v8, however with 6 bangers or 5 cylinders, it may cost you some midrange power.
8-10 works fine on these cars. Any more than that will bump your WOT timing up too high and you will see knock retard.
#136
Member
Join Date: May 2010
Location: Houston Area
Posts: 463
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-Z
Engine: 355, 6.0 (LQ4) soon
Transmission: 700R4
Axle/Gears: Borg Warner 2.77 for now
Re: upgrade to HSR?
Ya everyone tells me to kust twist the sucker, but even when it was stock I wouldnt mess with the timing much. For some reason 10* is workin pretty good for me and my stock chip. Any suggestions for a good place to get my chip tuned?
#137
Banned
Join Date: Sep 2003
Location: illinois, home of liberals, D'oh!
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula L98 power
Engine: '96 subaru, opposed 4banger
Transmission: TH700R4, subaru 4WD
Axle/Gears: 3.27, just works
Re: upgrade to HSR?
Stock cam and HSR will peak in the 5000-5200 rpm range and fall off after 5500. So shift by 5500.
Are you checking this with EST disconnected? If so, thats way too much timing on stock chip with no adjustments made to the tables. that is over 10 deg advanced over stock which will put your WOT timing at over 44 deg which will CERTAINLY detonate and cause all kinds of problems.
8-10 works fine on these cars. Any more than that will bump your WOT timing up too high and you will see knock retard.
Are you checking this with EST disconnected? If so, thats way too much timing on stock chip with no adjustments made to the tables. that is over 10 deg advanced over stock which will put your WOT timing at over 44 deg which will CERTAINLY detonate and cause all kinds of problems.
8-10 works fine on these cars. Any more than that will bump your WOT timing up too high and you will see knock retard.
I ran 16* with my stock cam, with my other goodies and the HSR. Now that I have another cam, making my L98 a heads/cam combo, I have to change my fuel pump then play with it some more. It hasn't moved for two months! I've just had too much to do.
Generally theres a lot to be gained from advancing the timing to a point, with certain combos, you may lose a little torque in some places, but you pick up on top; however, theres so many engines out that you can play with timing on, you just have to try it out. If not at the track, seeing mph and Times, you just have to go by the seat of the pants. Thats hard to feel sometimes, it has to be more than 10hp. Just my two cents
Oh yeah, ED wright from Fastchip, does great work. Go to www.fastchip.com
Thread
Thread Starter
Forum
Replies
Last Post