Ok guys i will be fully porting out my tpi intake. It is on a L-98. I will be porting the base and plenum. I will swith to a 58mm tb. Then i also have slp runners that i will be porting out.

I want to know how much i will gain? How much better will it be?

thanks
kevin

 

The TB seems a little much, the stocker should do just fine unless you are eventualy looking at FI, a stroker or an aftermerket manifold.

You are on the right track otherwise, the runners are the only stock parts that cant be ported or modded easily so they should be the first to go.

Just knocking the EGR walls down just behind the TB flange is said to give a real seat of the pants gain, other than that it comes down to a lot of variables. No one knows exactly what you are going to do so no one can tell you quite what you'll get.

I would say 10-20 HP with 10 being most realistic. Other mods later on might help bring out more of the ported intakes potential.

 

Well i am having a guy take it to the max being safe tho.

I have slp runners? which im also getting ported more out
then the base out far and the plenum.
the 58mm tb just bc in the long run i will be needing it.

thanks
kevin

 

i have mine gutted to the max except my runners i didnt cut and re weld them definatly a big difference between stock simple porting and major porting... kevin91z has done it in a post search it