I was just wondering what a heads/cam/bolt ons TPI 350 was capable of. The LT1s are going 11s NA on a stock bottom end, and making in the 420RWHP range. The TPI 5.7s have just as much displacement, so I figured that there is no reason that they should not come close on the track, even if the RWHP numbers don't show it because they are mostly automatics.

Just wondering because it isn't something that I see done much.

Jonathan

 

An L98 is just a Gen 1 smallblock, nothing special. Once the TPI intake is replaced by something that can flow, 11s arent that hard for a good heads/cam/etc combo.

 

Thats cool. I know a guy with an L98. I wonder if I could talk him into puttin some ***** to it. It'sa '92 with the 25th package. Would make a cool sneak attack-mobile.

 

Don't fortget a good exhaust setup.

 

That was in with the bolt-ons. Is there an intake manifold that you can use and keep the TPI setup?

 

Not really to get the same goals. If you want 11's you have to be very careful about your selection of engine components with TPI.

For your choices you can do a few things to get TPI to flow:

Upgraded (even semi-siamesed) runners, ported plenum, and a hi-flow intake base such as the TPIS Big Mouth.

You could also go Super Ram if you want to maintain the low-end torque.

However, for 11's it'll be much easier to go with a Holley Stealth Ram for about $650 with all the little bits. You lose some torque but gain the ability to breath and make more power, more easily.


*if you have LOTS of money and absolutley want the best TPI looking LTR setup out there you should check into First Injections. HUGE improvment. Only the Super Ram is on the same level as that stuff.

 

I don't personally have a TPI car. I had an LT1 Z, but I sold it and I now have a '93 GT. Just that a friend of mine and I were talking a few days ago about the potential of a TPI 350 with a good top end on it, and I have always thought that clean third gens are good looking cars, and are not all that common.

 

No testing, go HSR. Testing SR or MR

 

Mini Ram intake
Its very expensive though.

 

throw the TPI in the trash and THROW A CARB ON THAT B!TCH !!

some AFR heads....big cam....stall...gears...headers...exhaust...suspens ion work...pick up time slip

 

I'm building a carbed stroker for my '93 GT right now.

 

Carbs are not magical and do not give any power alone. They can be optimized easier than fuel injection but that is that. I had someone change a needle and jet on a carb for his ATV and it never ran quite right. If the upper end was great, lower end sucket and if lower and upper was right, mid was blah and so on. Different machine, same principle. If you want an all out track machine, go carb if you don't know how to change the EPROM. If you want a daily driver, go fuel injection.

 

I would always rather have EFI, but the sad fact is that there isn't an EFI manifold that can touch a Vic Jr. I considered an EFI spider, but geeze... I'm not made of money....

 

the main reason i switched to carb. was the HP to $$$ ratio...fuel injection cant even come close w/ a 10 foot long hot poker

 

Well.... heres thh way it was with my GT.... with injection, you need a fuel system anyway, so you gotta change that with a carb anyway. Here are the biggest ticket items....

Carb: $700 (badass carb)
Intake: $150 used
Air Cleaner: $50


Injection...
Intake: $400 used
Injectors/MAF: $500
TB: $100ish used
CAI: $120

These are the main parts.... and you see where it's going. Plus it's more complicated, and the price on the carb is a modified Holley with the good stuff.