My name is Kevin and I have a Lb9/auto/2.73 <---sounds like an Alcoholics anynomous intro.

I want to gain some upper end breathing room for the time being, but I'm just wondering if it's worth it. Just by doing the minor things to the plenum and such (no welders here) what gains are we talking? What HP and how many more rpms will I have on my stock configuration>>>>and eventually with headers and gears?

Be honest, is it worth it. And is the sotp feeling there?

 

Porting the plenum helps, MAYBE a 1/10 in the 1/4mile.

The time to port the intake manifold is not worth it ($ & time & hp).

Save the $ and go with headers and gears.

My 2 cents.

LB9GTA

 

I agree. The factory TPI system is really well designed, so leave it alone. Unless you have lots of other mods, like headers, heads, cam, etc. there's no point in messing with it. Gears will give obvious results that are real (please don't overdo it). A set of headers and good exhaust system is also a great step.

 

^ haha that was good for a laugh...tpi and good design....cept for the fact it cant breath past 5000rpm.

 

Thanks yous!

I'm planning on 3.42's and headers in the future. 3.42's will be first.

 

plagues....i think it breaths alittle better than that LO3.

 

lol are u referring to me? cause if u are i would say i dont have an LO3 i have an LH0.....and my car can go over 5000rpms...im not say the tpi is bad for torque...just bad for high rpms...