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# Calculator For Figuring the Cross Sectional Area of Ports with no Choke Point From RPM

Todays date is 8/20/2018

Cross Sectional Area equals the minimum cross sectional area of your intake port. (length times width)
This is most times your push rod area, but not always.

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

## Enter your Max RPM you Want

 Enter RPM: Enter Bore: Enter Stroke:

Input you Bore/Stroke and RPM please

## To Figure Your Minimum Cross Sectional Area (CA) of your Intake Port

 Make all measurements in inches, and convert fractions to decimal numbers. Examples: 1-1/4 = 1.25 2-3/16 = 2.1875 >> >> (1 4) + 1 (3 16) + 2

 Rectangular/Square runners To calculate the cross-sectional area of rectangular and square runner profiles, measure the width and the height of the runner, and multiply the two together. Measure in inches! Runner width: Runner height: Runner Area: square inches (calculated) Area = Width X Height

## To measure Round Ports

 Round runners To calculate the cross-sectional area of round runners, measure the diameter of the runner, divide by two, multiply the result by itself, then multiply that by 3.14. Measure in inches! Runner diameter: Runner Area: sq inches (calculated) Area = (Diameter 2)2 X 3.14

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