Cavi Mike wrote on 08/15/12 at 17:07:40:It's got nothing to do with matching the intake-boot length, it just has to do with the super-short distance between the mouth of the air-filter and the mouth of the carb. The turbulence doesn't have time to smooth out before it enters the carb. A velocity stack or "trumpet" will cure this.
Exactly right. Turbulent air doesn flow freely at all,....can be the same as choking it. No such thing as too much air, or too big an aircleaner !! Ram air induction is even better yet. Anytime you have to rejet, its because you had turbulent air, either before or after the air intake mod.
In some cases you may have even created a vacuum on the intake area, completely defeating the purpose. This is why the OEM air intake components are hard to beat. You think there ain't no engineering into the intake system for free flowing....non turbulent air,....think again.