Hello everyone,

I currently have TBE, K&N intake and a tune. I will be adding a o2 housing, LICP, GM 3port boost controller (to get rid of my MBC) and a retune.

My question is, should I get my intake and exhaust manifolds ported? Besides quicker spool, what kind of whp gains would I expect?

Thanks

 

Try porting the exhaust mani, hotside also. On mine, it was about 300-400rpm quicker spool. notsure about hp as i upgraded from 03turbo to a evo9 turbo with those 2 things ported.

 

I'm curious about this as well, what kind of gains can be had from porting on a relatively stock Evo IX?

 

if you port the intake manifold, you also need to port the throttle body or it was kind of a waste of money just doing the mani. yes, port the exhaust mani! porting the turbo will get you a small gain, hard to say how much, but a gain is a gain and every little bit helps unless you're planning on changing turbos in the near future. if you want to go to a bigger turbo, i'd say skip the exhaust mani and 02 and such....if you're going with a more powerful stock frame turbo (White, Green, BBK, Tomei, Red) then go ahead and port the exhaust and intake mani's, TB, and then have the hotside ported along with the new turbo rebuild.

 

id say port the exhaust manifold and the hotside if you want quicker spool.

 

+1 I don't think you need to touch the intake manifold unless you're running a big turbo. You'd be starving it of air. At the most just port the tb on the intake side. I would recommend porting the exhaust mani and hotside too.

 

I believe a deep port job of the exhaust manifold gives around 8whp and very little from porting the hotside. Don't feel like searching for the info from back in the day.

 

from my experience, porting the hotside will enable you to hold higher boost in the upper rpms.