Re: Interesring article on fluid dynamics and airflow
Subject: Re: Interesring article on fluid dynamics and airflow by jsup on 2008/11/23 21:21:04
Quote:
dan0617 wrote: Wet flow might very well be a better measurement than dry flow, but until EVERY head manufacturer posts wet flow numbers, I can only compare dry flow as I can't afford to buy heads and have them wet flown for comparison purposes.
I am not saying wet flow is better as a measurement, I am saying that it is better in determining chamber design which can negate published dry flow numbers AS A MEANS to measure what is a "better" head for an application.
The only true test is to see the heads perform at operational conditions, and come up with a measurement of that. Right now, that doesn't exist as an industry standard.
Quote:
Once you choose an intake runner size, the heads that flow the most in correlation to where your cam keeps your valves the most would be the best for you. You must choose the proper intake runner size or you will be making power below or above your combo's powerband, and perhaps, if too large, you will have a learching and bucking ride. Not saying the smallest ports are best. If you think I am, reread this.
It's about total VE. Once you've hit 100% VE, that's as far as you need to go on any one part. That is something that is published and calculable.
I think it makes the most sense, as you say, to pick a cam, then rockers, then heads then intake, in that order.
