Carburetor CFM Calculator
Estimate the carburetor CFM rating an engine needs from displacement, max RPM and volumetric efficiency.
Enter your values and press Calculate.
How to use the Carburetor CFM calculator
Estimate the carburetor CFM rating an engine needs from displacement, max RPM and volumetric efficiency. Enter your values above and press Calculate; the result appears instantly, and the formula used is shown below so you can check the working.
Formula
CFM = displacement × RPM ÷ 3456 × VE
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