CFM Calculator

Enter your engine specs and instantly see airflow estimates across four common VE profiles.

Maximum Engine RPM: Engine Size in Cubic Inches:

Stock (80% VE):

–

Typical for OEM engines with restrictive intake and mild cam.

Street Performance (85% VE):

–

Improved intake, headers, and tuning.

Race engines (95% VE):

–

High-flow heads, aggressive cam, optimized exhaust.

Naturally aspirated competition engines (110% VE):

–

Full Race CFM — for engines with exceptional breathing capacity and minimal restriction.