Ok I have a B16A2, when I bought the engine it had a Skunk2 IM (Old Style), AEM CAI (I believe 2.75" Diameter), and I believe the stock Throttle Body. What I am trying to do is port match everything, but I got to thinking, is there any sense in doing any intake work with a non ported head? I mean can the stock Head flow more air than the stock components provide? For instance if I upgrade my Intake, Intake Manifold, and Throttle Body is that going to just cause more resistance?

 

It wouldn't cause increased resistance because your head is what determines how much air is being drawn in at any time N/A, so you'd never have a case of "too much air" backlog. Now there are issues with flow harmonics in intakes, but that's a different subect; If this was a F/I case it would be different.

 

Maybe resistance was a bad term to use, what I was talking about was the flow. I know I have read stuff about AEM claiming that there intakes have the optimal flow "pulses", so the air arrives at the right location at the right time. What I am wondering is there a size that works best for stock heads? I have been told the Skunk2 IM (Old Style) has a 60mm inlet vs the stock b16a inlet size of 54mm, and that putting a skunk2 IM on a car without porting, and tuning will cause the car to actually run slower. I don't know if there is any truth to that, the thing that made me start wondering this was becuase I wanted to port match my intake to my intake manifold, however 60mm is only 2.36 inches, well most intakes are 2.5"-3". Is there a pattern? like should the intake be big and scale down to a smaller IM? From what I have been told/read is that port matching with a velocity stack is the way to go for All Motor (short of putting on ITB's).

Any thoughts?