H22toF20

How big can you open up the OEM manifold(non-DBW), without messing with the IACV ports? Seems very little people run throttle bodies over 64mm. Just wondering if the manifold was the reason for this.

I've done a lot of searching with zero results.

red@9k

I have a 74mm Full blown TB with a port matched OEM IM.

s2cho

sorry to thread jack but what gains did you get?

H22toF20

Is it 74mm at the IM side? I keep seeing people stating that they have a 70mm TB, yet the IM side of the TB is only 64mm. I guess some people don't know that the smallest part of the TB is the real size, not the opening.

omairtheman1

^This... I'd like to know as well about the gains that Red@9K see's with this TB + Ported IM.

Moddiction

He's boosted so gains won't really reflect what NA gains would be, if any.

woodburn

His IM is port matched to his TB so there the same size.

red@9k

Sorry this is the only pic I have before it was installed. I purchased a spare OEM intake manifold and had it shipped to Full Blown. They did the porting of the IM and supplied the 74mm throttle body also.



I don't have a before and after comparison in hp #'s as I did my build all at once plus I'm boosted now. I did make 511 WHP @ 15 PSI. (stocked/head block)

s2cho

what intercool pipe size are you running? 2.5?

red@9k

Its 2.75" AFI charge piping