Admin 3" Long Tube Intakes

Originally Posted by ghotnit

I have Synolimit’s setup with AAM’s intake on my car and I got gains with a tune. The key is matching the diameters so there is consistency in the airflow throughout the intake tract to keep the flow smooth. I looked at the EPS TBs and 70mm looked great but the manifold can’t go to 70mm and EPS uses an adapter to neck down to 58mm for the manifold. So where is the benefit? Synolimit’s setup is consistently 63mm (2.5 inches) which is as large as one can go. A 3-inch intake will not supply any more air than a 2.75 inch because it’s not being asked too (in a NA engine). The total vacuum demand starts in the manifold and whatever volume it can demand is all you need until you start forcing air.

Originally Posted by socce

This makes sense to me but It seems there is quite a divide by forum members as to whether this is the case.

I know I have gotten a few responses from some generous members on here regarding this. But I am hoping some others might chime in.

If some of you guys could start your intake build again from the beginning today. What pieces what would you go with ?