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Head Flow From CID and RPM Calculator



PONTIAC POWER RULES ! ! !

Calculate Head Air Flow From RPM And CID





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For a more accurate calculations try Larry Meaux's Pipe Max.
His program is excellent and will provide a lot of info.
Pipe Max

For an excellent ET Calculator, try ET Analyst from Max Race Software.

These formulas are from A. Graham Bell’s Performance Tuning in Theory and Practice..



This is the "minimum" amount of Flow @ 28" needed to attain Peak HP at your RPM point


If you input 100(%) for Volumetric efficiency this will be close to the maximum rpm at peak HP at your CFM.

If you then input 127.5 (%) for Volumetric efficiency this will be close to the minimum rpm at peak HP at your CFM.


Engine Size (CID):
Number of Cylinders:
RPM:
Volumetric Efficiency (typically 100-127.5):
FLOW at 28 inches: Input Number Of Cylinders please