Todays date is 4/25/2024




Calculate Head Air Flow
Needed For The HP Wanted





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These equations are for recreation only.
Not a substitude for actual testing.
The HP is based on rear wheel HP.

This calculator is based on Naturally Aspirated applications.


Estimate Intake Airflow needed from Horse Power wanted
Enter Rear Wheel Horse Power wanted:
Select Type of Engine Work: Typical Race Engine
Super Stock
ProStock/Comp
Mountain Engines
Enter Number of cylinders: 
Please Input The HP,Engine Type and Number of Cylinders

These calculations are for port work with no 'choke'. "Choke" is defined as the intake port with flow, but not adequate cross sectional area to provide real intake flow to fill the cylinders. To figure your 'choke' - Choke Calc