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Thread: engine math

  1. #1
    Junior Member JOURNEYMAN
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    Dec 2007
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    holiday florida
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    26

    engine math

    can any one tell me the formula used in figureing c.u

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Aug 2007
    Location
    Lost Creek, WV
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    533
    The formula is: .7854 x bore x bore x stroke x number of cylinders.

    TS1955

  3. #3
    Senior Member RACING JUNKIE fla1976's Avatar
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    Aug 2007
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    1,530

    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.

  4. #4
    Senior Member RACING JUNKIE fla1976's Avatar
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    Aug 2007
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    1,530

    Math

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

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

  5. Racing Junk


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