Posted by gtx1967jewison on January 04, 2013 at 18:28:01 from (174.225.129.153):
In Reply to: Re: 2 cyl 820 intake posted by Rwolfejr on January 04, 2013 at 11:12:15:
Bob, a smaller diameter intake pprt inncreases the velocity of the air entering, and by changing the length or diameter you can 'tune' the intake to actually ram air into the cylinders at a slightly positive pressure. Google intake tuning, ram air etc. There are several calculators you can use. Input bore, stroke, rpm, valve size, runner & plenum size etc. This works on direct injected engines also, both gas & diesel. Great stuff! Good luck
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