What will it run curiosity
#1
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
What will it run curiosity
Im currently in the rebuilding process of my 1987 Trans Am and all though it may never see a track, Im just curious of what you all think it could do in the 1/8 and 1/4.
1987 Trans Am
1996 350 Vortec (fresh rebuild on block) stock bore, pistons, manifolds
XE264HR
Edelbrock Performer Intake
Stock CC Quadrajet
Single in dual out Flowmaster Exhaust
2.73 gears
Automatic
I know it isnt much but it is a long term project between my dad, fiancee, and myself. So all the bad such as gears and exhaust will all be changed one day. Just got some curiosity built up. Thanks to everyone who gives me their opinion!
1987 Trans Am
1996 350 Vortec (fresh rebuild on block) stock bore, pistons, manifolds
XE264HR
Edelbrock Performer Intake
Stock CC Quadrajet
Single in dual out Flowmaster Exhaust
2.73 gears
Automatic
I know it isnt much but it is a long term project between my dad, fiancee, and myself. So all the bad such as gears and exhaust will all be changed one day. Just got some curiosity built up. Thanks to everyone who gives me their opinion!
Last edited by 85T/A350; 04-19-2011 at 02:28 AM.
#3
Senior Member
Joined: May 2004
Posts: 608
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From: Oshkosh wi
Car: 77 Firebird
Engine: 454
Transmission: th350
Axle/Gears: 4.10
Re: What will it run curiosity
I agree with mw66nova. Somewhere in the mid to lower 14s' depending on the usual factors like traction and how bad your exhaust is holding you back.
#4
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Joined: Jul 1999
Posts: 17,171
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: What will it run curiosity
Exhaust holding it back? What about those 2.73 highway gears. I doubt it will be in high gear when it crosses the finish line.
I remember having 3.27 gears. I was shifting at 7000 rpm and got into high gear about half way between the 1/8 and 1/4. By the time I hit the finish line, the engine was finally getting into it's powerband.
I remember having 3.27 gears. I was shifting at 7000 rpm and got into high gear about half way between the 1/8 and 1/4. By the time I hit the finish line, the engine was finally getting into it's powerband.
#5
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: What will it run curiosity
3600-3800 stall and 3.73 gears with some 26x10 stiff side wall ET drags or similar and it would be rocking a lot quicker.
#6
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Member
Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
It wont ever have a stall that big lol. It will primarily be a weekend street cruiser with very very limited track time. LIke I said, Im just curios lol. I am going to be switching to 3.42s and shorty headers hopefully soon. What about then?
#7
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
that big? i DD'd a 4000 rpm stall speed 10" ati unit when i still had a regular sbc in the car with a 700r4...got 22mpg on the highway on average, and would run bottom 12's consistently. i'm looking at a 5500 8" now to replace what i have, lol! 3600 is mild street car stuff!
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#8
Thread Starter
Member
Joined: Jul 2006
Posts: 304
Likes: 0
Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
that big? i DD'd a 4000 rpm stall speed 10" ati unit when i still had a regular sbc in the car with a 700r4...got 22mpg on the highway on average, and would run bottom 12's consistently. i'm looking at a 5500 8" now to replace what i have, lol! 3600 is mild street car stuff!
What if I go with this combo:
3.42 gears
XR270HR (http://www.compcams.com/Company/CC/c...?csid=187&sb=2)
Shorty Headers
3in single exhaust
The tires are quite a bit wider than stock but im at college and dont know the exact specs. The most racing this car will see is roll racing but Ive always wanted to go to the track.
#9
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: What will it run curiosity
Converter technology has come a LONG way since the 70s. I had a 10" tci super street fighter that stalled 3800 out of the gate but would take 1800 rpm to pull away slowly from a stoplight, nothing crazy about it at all. You're planning an even bigger cam but have too little stall right now, you need a matched combo.
#10
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Joined: Feb 2010
Posts: 1,446
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From: Orlando
Car: 1991 Camaro Z28
Engine: 357, Canfield heads, solid roller,
Transmission: Upgraded 03 Cobra T56
Axle/Gears: 9" 3.50 gears and Detroit Locker
Re: What will it run curiosity
Converter technology has come a LONG way since the 70s. I had a 10" tci super street fighter that stalled 3800 out of the gate but would take 1800 rpm to pull away slowly from a stoplight, nothing crazy about it at all. You're planning an even bigger cam but have too little stall right now, you need a matched combo.
#11
Thread Starter
Member
Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
Converter technology has come a LONG way since the 70s. I had a 10" tci super street fighter that stalled 3800 out of the gate but would take 1800 rpm to pull away slowly from a stoplight, nothing crazy about it at all. You're planning an even bigger cam but have too little stall right now, you need a matched combo.
#12
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
probably something in the 3200-3500 range
Last edited by mw66nova; 04-20-2011 at 12:14 PM.
#13
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Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
What kind of horsepower will this combo give? At flywheel
350 Vortec Fresh Rebuilt Stock bore and pistons
Edelbrock Performer Intake
Holly 750 4160 Carb
XR270HR
Shorty Headers 1.5in primaries, 2.5in collectors
350 Vortec Fresh Rebuilt Stock bore and pistons
Edelbrock Performer Intake
Holly 750 4160 Carb
XR270HR
Shorty Headers 1.5in primaries, 2.5in collectors
#14
Supreme Member
iTrader: (5)
Joined: Jan 2002
Posts: 13,622
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: What will it run curiosity
performer rpm will be a 10 hp at least improvement, the 4160 will be holding you back also compared to a 4150 carb, those headers are far too small also.
#15
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Member
Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
They are what Ill have to use for the time being. Its a very long term project that Im sure will see many different combos. But as of now thats probably what it will start with. So what do you think it would be anyway?
Last edited by 85T/A350; 04-25-2011 at 01:02 AM.
#16
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
given the limitations, if it makes over 260fwhp, i'd be very pleased.
#17
Re: What will it run curiosity
It'll run upper 30's if you take your time.
But probably a mid 14.
And instead of recommending a higher stall torque converter, different cam, etc, I'll do a one up to end all one ups.
Sonny Leonard 903 C.I. 2,700+ HP pro mod engine. It'll run you over $90,000 complete. I believe just the heads are worth over $15,000. It'd be a challenge to run a 14 then! Tap that gas pedal a little bit too much and there's an instant 10.
But probably a mid 14.
And instead of recommending a higher stall torque converter, different cam, etc, I'll do a one up to end all one ups.
Sonny Leonard 903 C.I. 2,700+ HP pro mod engine. It'll run you over $90,000 complete. I believe just the heads are worth over $15,000. It'd be a challenge to run a 14 then! Tap that gas pedal a little bit too much and there's an instant 10.
#19
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Member
Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
Would that combo not be better for 5 ore horsepower than the stock vortec has? The headers may be small but surely they're better than manifolds? Would that intake and carb be less than the factory tbi? I know its not optimal stuff but that doesnt sound right. I could be wrong though.
#20
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
the performer intake runners are nearly identical to the factory intakes of the 1970's, and is commonly referred to as a stock replacement. for the vortec heads, they just moved the mounting holes around, the runners are the same old design. it's not ideal. a performer rpm air gap would be a much better option.
the carb is also not ideal, a 4150 style carb (even vacuum secondary) would be better with the rear metering block, and all the adjustability to be had there. mechanical secondary is always ideal in my opinion, though will show your lack of converter in a big way...
the headers suck...about the same as stock manifolds...if you're stuck with stock exhaust routing, atleast try to pick up some hedman shorties. they're 1 5/8"x3". if you have the fab skills, or the money to pay someone with fab skills, or are willing to learn some fab skills, then put some cheapy hedman longtubes on it, build a nice y-pipe and a quality catback, or run duals.
the carb is also not ideal, a 4150 style carb (even vacuum secondary) would be better with the rear metering block, and all the adjustability to be had there. mechanical secondary is always ideal in my opinion, though will show your lack of converter in a big way...
the headers suck...about the same as stock manifolds...if you're stuck with stock exhaust routing, atleast try to pick up some hedman shorties. they're 1 5/8"x3". if you have the fab skills, or the money to pay someone with fab skills, or are willing to learn some fab skills, then put some cheapy hedman longtubes on it, build a nice y-pipe and a quality catback, or run duals.
#21
Re: What will it run curiosity
Truth. I have a mechnical secondary Edelbrock, stock converter, and it wasn't exactly a perfect daily driver. I unbolted it, and set it on the floor of my garage, as a testament to wanting a turbo 383 with a CSU blow through carb.
#22
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Joined: Jan 2002
Posts: 13,622
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: What will it run curiosity
edelbrock carbs are not mechanical secondary, they work off an air flow flap something errrr other. Either way they're not a "performance" carb and work great on 4x4s and motorhomes or car show cruisers.
#23
Re: What will it run curiosity
That is news to me then. I was told that's what my carb was, and never looked into it, since I didn't really care. Considered it a junk carb to begin with.
I'd rather have a Holley due to the good things I've heard about their street manners.
I'd rather have a Holley due to the good things I've heard about their street manners.
#24
Re: What will it run curiosity
Originally Posted by xpndbl3
edelbrock carbs are not mechanical secondary, they work off an air flow flap something errrr other....
#25
Thread Starter
Member
Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
Looks like im going with Hedman 68460 Long Tubes with duals. Would 3in duals be to big for my application? Should I step it down to 2.5in?
#29
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Member
Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
The car is about finished and with a few changes from what I had planned. I figured I would ask again what you all think it might do in the 1/4 as well as the 1/8.
96 Vortec 350
Comp XE270HR
Stock Stall(will be 2800-3000 in a month or so)
3.42 rear end
Hedman Long Tubes
Dual 2.5in exhaust
Jet Stage 2 Quadrajet
Performer Intake
96 Vortec 350
Comp XE270HR
Stock Stall(will be 2800-3000 in a month or so)
3.42 rear end
Hedman Long Tubes
Dual 2.5in exhaust
Jet Stage 2 Quadrajet
Performer Intake
#30
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
i say not much better still till you get a better converter and better intake. maybe some 13.3's or so.
#31
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Joined: Jul 2006
Posts: 304
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Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
The intake change may happen somewhat soon. The converter Im still struggling with. I've had several people here tell me 2800 or so would be perfect and any higher will be to much. But a few of you in this thread tell me I need to be higher into the 3000s?
#32
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
3200+ or don't waste your time. it's a lockup style converter so it'll drive like stock once locked up in OD anyway (assuming you've taken the proper steps to ensure it locks up). it'll be a little soft in the first three gears around town, but highway driving will be unchanged. give Fast_383 a shout at Transmission Specialties, he gives a hookup price to tgo members.
that coupled with a performer rpm air gap and jump into the 12's with both feet. get ready to start picking up 10 bolt pieces off the racetrack!
that coupled with a performer rpm air gap and jump into the 12's with both feet. get ready to start picking up 10 bolt pieces off the racetrack!
#33
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Member
Joined: Jul 2006
Posts: 304
Likes: 0
Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
3200+ or don't waste your time. it's a lockup style converter so it'll drive like stock once locked up in OD anyway (assuming you've taken the proper steps to ensure it locks up). it'll be a little soft in the first three gears around town, but highway driving will be unchanged. give Fast_383 a shout at Transmission Specialties, he gives a hookup price to tgo members.
that coupled with a performer rpm air gap and jump into the 12's with both feet. get ready to start picking up 10 bolt pieces off the racetrack!
that coupled with a performer rpm air gap and jump into the 12's with both feet. get ready to start picking up 10 bolt pieces off the racetrack!
#34
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
absolutelty. you won't be taking advantage of what makes the 700r4 such a great street/strip transmission if you don't. if you don't lockup the converter, it'll just free spin below stall speed, which will do nothing but put heat in the transmission, and quickly decrease the life of the trans/converter.
tci makes a very nice universal lockup kit. it's about 100 dollars, and works like a charm.
with traction and proper tuning, i see no reason why that thing won't go 106+ mph, which will be good for 12.7x's or better.
tci makes a very nice universal lockup kit. it's about 100 dollars, and works like a charm.
with traction and proper tuning, i see no reason why that thing won't go 106+ mph, which will be good for 12.7x's or better.
#35
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iTrader: (5)
Joined: Jan 2002
Posts: 13,622
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: What will it run curiosity
3600 converter, performer rpm air gap, 750dp and 3.73 rear gear.....good for 12s like I wrote months ago
#36
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Member
Joined: Jul 2006
Posts: 304
Likes: 0
Car: 1987 Pontiac Trans Am
Engine: 350 Vortec
Transmission: 700R4
Axle/Gears: 3.42
Re: What will it run curiosity
I seen that lol, but I have 3.42s and a different carb then what you defined. I was referring to mw66nova thinking that I can hit 12s with the combo I have. Assuming I use a 3200+ stall and change intakes.
#37
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: What will it run curiosity
i believe that the combo will run 12's with 3200-3400 rpm stall speed, your jet 2 q-jet, performer rpm, your 3.42's, and some traction, steve's will just go further into the 12's.
#39
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Posts: 784
Likes: 1
From: Philly, PA
Car: 1986 Camaro SC
Engine: None
Transmission: None
Axle/Gears: Moser 9" W/ spool 3.50 gears
Re: What will it run curiosity
I think you guys are trying to make lemonade out of lemons. Bringing up your street motor in this forum is like driving your daily driver Hundai into a Nascar Pitstop to have your tires rotated. These guys have you running 12's with a Tahoe motor.
Am I missing something? It's a stock replacement truck motor with a "Less than Hot" cam. It's actually worse, it has a Quadrajet carb and Performer intake. It would probably be faster with the Vortec throttle body on it.
Please don't take what i'm saying as any kind of insult. You didn't set out to build a race motor or a race car and you made that clear. I think you'd be ahead of the game with a 13.99 slip. As far as torque converters are concerned you're probably right on track with a 12 inch 2800 stall. I have sold about 20 of them to members on this board with more agressive combinations than yours. All of them have felt they worked great. A 10 inch converter with 3000-3200 stall would be nice to if you want to spend the extra money and have more of a punch to the car. IT will also show you more slippage driving around through the higher gears. Your motor is very mild. A mild torque converter will work nicely with it.
Am I missing something? It's a stock replacement truck motor with a "Less than Hot" cam. It's actually worse, it has a Quadrajet carb and Performer intake. It would probably be faster with the Vortec throttle body on it.
Please don't take what i'm saying as any kind of insult. You didn't set out to build a race motor or a race car and you made that clear. I think you'd be ahead of the game with a 13.99 slip. As far as torque converters are concerned you're probably right on track with a 12 inch 2800 stall. I have sold about 20 of them to members on this board with more agressive combinations than yours. All of them have felt they worked great. A 10 inch converter with 3000-3200 stall would be nice to if you want to spend the extra money and have more of a punch to the car. IT will also show you more slippage driving around through the higher gears. Your motor is very mild. A mild torque converter will work nicely with it.
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