Has anyone seen any worthwhile gains by porting the runners and TB opening (going to add a larger diameter TB later on) on the OEM intake manifold on a s/c or turbo setup? I figured I may do this while the engine is out and am wondering if anyone has done this before with good results.

 

anybody feel its benefitial to port the runners?

 

I doubt it will help much. Maybe as much as 0.1 more psi of boost would.

 

Dont know for sure, but from what I've heard it is hard to improve upon the factory design. Probably not worth the money.

 

The larger TB with matching port would help. Porting the intake runners might not be worth it unless you're running higher boost levels, but it certainly wouldn't hurt IMO. Will your head be ported as well?