Subject: Re: Primary tube math by tequilaboy on 2008/8/6 19:06:03
With forced induction, the only concern is to minimize backpressure at acceptable sound levels, and to keep the flames from setting things on fire.
The intake pressure and overlap will scavenge the cylinder just fine once your into boost. My guess is that you're into boost before the headers would have any effect.
I suspect its what's downstream that has more effect on the back-pressure than the primary tube diameter, but I agree that bigger should be better.
