squirrelpf.com has the calculator (great site, BTW), but we just figured out the air mass requirement for the engine and HP goal on the chalkboard. All the pressure maps are in lb/hr., so it wasn't difficult to find where our combo landed for a particular compressor.
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Ray Kaufman-Wyotech chassis fab instructor
Custom suspension design and consultation.
(Now 2) Big Block asphalt supermodified ('cause too much is never enough...)
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