Intake Question?
Super Moderator
Joined: Sep 2001
Posts: 10,795
Likes: 5
From: Pflugerville, TX
Vehicle: 2000 Elantra
What you know is just enough to cost yourself money.
Intake manifold runner length is tuned for exactly one engine speed unless the manifold has active length-altering magic going on. Longer runners put that speed lower in the RPM range, and shorter runners mean power at a higher engine speed. For a non-turbo car (even a turbo car running only 3-400HP) the stock 52mm throttle body will be fine. A larger throttle body will mean less-precise control at low part throttle which is where you spend most of your time, going back and forth to work.
Unless you have some pretty expensive fluid dynamics modeling software working really hard, you are probably not going to see a gain from a different car's stock manifold that is worth the effort to change the manifolds out. The Airram will give you power, but that is a whole 'nuther kettle of fish.
Intake manifold runner length is tuned for exactly one engine speed unless the manifold has active length-altering magic going on. Longer runners put that speed lower in the RPM range, and shorter runners mean power at a higher engine speed. For a non-turbo car (even a turbo car running only 3-400HP) the stock 52mm throttle body will be fine. A larger throttle body will mean less-precise control at low part throttle which is where you spend most of your time, going back and forth to work.
Unless you have some pretty expensive fluid dynamics modeling software working really hard, you are probably not going to see a gain from a different car's stock manifold that is worth the effort to change the manifolds out. The Airram will give you power, but that is a whole 'nuther kettle of fish.
