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kirkf kirkf is offline
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Join Date: Sep 2005
Location: Winnipeg, MB Canada
Posts: 221
Help with supercharger calculations


I am trying to setup a used SoK supercharger and I need some help trying to figure out some of the calculations involved.

Almost everything I read talks about calculations based on how many PSI of boost you are running. However I am missing something fundamental. How do I figure out how many PSI of boost I will have?

I have the compressor map which relates pressure ratio to air flow, and the basic specs of the supercharger.

I would like to know how many PSI of boost I will be running if I spin the SC at:

1.685 * engine rpm
1.764 * engine rpm
1.973 * engine rpm
2.142 * engine rpm


1989 911 Carrera 4 (964)

Last edited by kirkf; 03-09-2008 at 04:05 PM..
Old 03-09-2008, 10:21 AM
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