keythyscamaro

I wanted to know if i could make the TPI 5.7 liter i am getting faster then a stock new Z i am getting headers and 3.73 gears with it. Any estimates at wut horse power i would be at with just those mods? The TPI is out of a corvette I think a 92 the year before they put in the LT1.

doug791

the 4th gens have 2 different motors 93-97 is lt1 and 98+ is an ls1.

To hang with the LT1 the exhaust and gears should get you pretty much even with an LT1, with good tires and a good launch you should be basically dead even. A shift kit in the tranny would probably also be good for another tenth off your 1/4 times.

To hang with an LS1 youre going to need some actual work to the engine, i would think the right intake and a cam should be able to net you a mid 13 but some porting to the stock heads wouldnt definitly put you over the top. However at this point youll probably blow up your stock tranny and rear end.

simple

'92 was the 1st year of the LT1 in Corvettes (just being a stickler)

of course you could make it faster, power and racing stems from how thick your wallet is

teke184

on the street you'll have good chances against alot of cars with moderate modifications, mainly due to the insane torque output of the TPI...

but the high rpm breathing problems will kill you in anything more than a 1/8th mile against the LS1...

my 99 does 60-120 in 4th like my old iroc use to run from 20-80!!!


i say port the hell out of the intake, build a ram air, port the heads, mild cam and some headers. then work on the suspension and traction.

the fun part will be trying

klumb15

i already beat a LT1 6 speed 2 times with my 3rd gen with the vette motor and some minor mods...the kid was making excuses that he couldn't get traction, but his rear tires were 255's and he would dump his clutch at like 4 grand, but he had the car for about 5 months so he should've known how to race it....but i didn't care, i left both times with a win

94z'sson

2 yrs ago when i had my IROC 305 TPI that was completely stock i could just barely hang with an LT1 car and not even close with a LS1 car.

then i bought a 87 Z28 with a small cam 355/T5/3.73 and good suspension(cam was only .488 lift) i could walk just about any bolton LT1 and i would lead an LS1 car til i hit 3rd gear and then it would be neck and neck

i saw the best thing to do is get the car to hook great from a stop then get you a shot of gas and a good top end of your motor and you will be fine to walk most cars since you will be hooking like a mother

doug791

thats the other nice part, stock an l98 third gen will go a 14.5-14.7. With gears and full exhaust its not hard to knock a .3 off your times. Combine that with an lt1 running a 14.0-14.2 if the car has a 6 speed and the driver isnt perfect, has a bad launch whatever, chances are hes going to chime off a mid 14 to high 14 where as with the auto unless youre a tool you should get a pretty good launch every time. Just dont mash your foot to the floor.

Marc 85Z28

Torque and traction will win the race almost every time on the street, even against a car with much more power. Want proof? How about a video of a TPI car (torque and traction) vs a LT1 car (more power)?

http://www.blackcow.org/vids/90Iroc_vs_LT1TA.avi

That's how you do it!

klumb15

hey marc, do you have any pics of your ride? everything you ahve listed is pretty much everything I wanted to do, i would also like to see that corvette blue on a third gen...

ME Leigh

Wow, thats neat, not.

If you watch the video the 97 is just sitting there for a couple of seconds then launches spinning the tires for 25 yards. Not to mention the race was what 200 yards! Woppity do! That doesn't prove crap.

Marc 85Z28

ME Leigh: It proves plenty. Not only does it show the advantage of torque and traction, but it also proves anything can happen on the street. You snooze you lose... The same principal of torque and traction applies to the new STi's and EVO's. Stock for stock, an LS1 has more power. However, with a high rpm launch the STi or EVO has more mechanical torque and much better traction. The LS1 will be playing catch up until speeds climb well over 60mph.

I've seen more than my share of street races where the more powerful car loses to the less powerful car because of traction issues. Several new Vette owners have fallen prey to TPI Vettes in light to light races.

A good running L98 car makes a formidable street racer through first and second gear with good traction.

And if all that still doesn't convince, maybe you'll like this example better: L98 car with just free mods vs TT Supra


klumb15 - Do a search under my username with "pics" and/or "zr1 wheels" You should find what you're looking for, albeit with old and poor quality pictures.

ME Leigh

**** anything can happen, if the driver can't drive worth a **** or is a complete dumbass moron!

joed4640

wait keithy- let me get this all staright.

so now your ditching your S/C 3.4L idea?
And the on/off switch for the Supercharger?

and now your putting a 15 year old 350 TPI motor in your 4th gen?

You should sell your camaro and buy a honda

keythyscamaro

dont be dumb joed the 350 tpi in my camaro that has been bored and port and polished with headers and 373 geats and a higher stall will be able to waste any stock v6 and maybe new z28.

FruityOne

Keith if you are dropping a TPI 350 in there you had BETTER do LOTS of induction mods or you will be dissapointed with the 3.73's.

3.73's are at the limits of a TPI induction system. I wouldn't have 3.73's behind a mildly modifed TPI. 3.45's would be PLENTY with the shear torque of the setup.