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Registered
Join Date: Jan 2003
Location: Idaho Falls, ID
Posts: 1,199
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1 psi of boost is approximately 13RWHP.
A good 300HPengine is pumping out or sucking in approx. 450 cfm at 6000 rpm.
So if the supercharger pumps 850 cfm into the 450 cfm engine, the result will be a back pressure build up (boost). The more air the supercharger pumps in, the higher the boost and theoretically, the higher the HP.
Now this also explains why when adding say a larger Carb, you do see some power increases, the engine can breath better and the carb is no longer as much of a restirction and it is capable of suppling adequate fuel with that increased CFM.
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75 914 - Undecided.
80 931 - Gone, but not forgotten.
72 914 - old toy- sold.
And a whole bunch of German scrap metal shaped like 924's.
Old enough to know better, and stupid enough to do it anyway!
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