engine math

Old 05-01-2009, 12:28 PM
  #1  
rhiasdaddy
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Default engine math

can any one tell me the formula used in figureing c.u
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Old 05-01-2009, 12:31 PM
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TS1955
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The formula is: .7854 x bore x bore x stroke x number of cylinders.

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Old 05-01-2009, 03:08 PM
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fla1976
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Default Cubic Inches

The formula for cubic inches is: Pi x radius squared x stroke x number of cylinders.

(radius is the bore/2)

A 283 has a 3.875 bore and a 3 inch stroke.

(((1.9375 x 1.9375) x 3.1416) x 3) x 8= 283.038525

Same as above but it is easier for me to use and visualize.
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Old 05-03-2009, 03:52 PM
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fla1976
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Default Math

Here is a site if you don't want to do the math yourself.

http://www.mindsciencemotorsports.com/graphics/tech.htm
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