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Calculator For Figuring Choke Point Of Ports

Todays date is 6/19/2024

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

 CA: Bore: Stroke:

Input you Bore/Stroke and CA please

To Figure Your Minimum Cross Sectional Area (CA) of your Rectangular 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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