flyinghigh2k8

OK I think you have answerd my question thanks alot

gspfunk

Air velocity is as/more important than volume. A smaller TB keeps the velocity up b/c the intake/heads don't get more air than they can handle. If you go to summit and compare intakes and cams, you should be able to see what specs and features help create the rpm range. Example: the runners on the Street/Track Heat are the same diameter from top to bottom, but the Street's runners are 14", creating more tq down low, while the 12" runners on the Track make more power higher in the rpm range. Shorter runners=higher rpms, but less tq. Longer runners=more tq, but less upper end power. There's more to it, but that's the basics.

On cams, the lift and duration affect how much air can flow in/out of each cylinder. Different comboinations yeild different results.