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Thread: formula to work out engine capacity

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    Default formula to work out engine capacity

    Is anyone able to give me the formula to be able to work out the CC capacity fo any engine e.g, bore X stroke - ? X the amount of cylinders
    Thanks

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    Administrator Aeroliner's Avatar
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    Default Formula


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    Team Member zul8tr's Avatar
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    In simple terms

    Cylinder stroke (inches) x Cylinder Diameter(inches) x Cylinder Diameter (inches) x 3.1416 x 0.25 x Number of cylinders = Displacement in Cubic Inches

    To convert to CC's multiply cubic inches in above by 16.3871 (rounded value of conversion)

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    Administrator Aeroliner's Avatar
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    Default Easy way

    The easy way is area x stroke x number of cylinders. A = 3.14159 x radius squared. Calculation can be done in metric units without conversion

    Alan

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    Team Member zul8tr's Avatar
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    Each way is easy one uses radius and the other uses diameter which is directly given in specs. Yes metric can be used in either case but need to convert all dimensions first. I think easier to use one conversion at end.

    Use which ever.

    Here is the easiest way

    http://www.ajdesigner.com/fl_engine_...splacement.php

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    Quote Originally Posted by zul8tr View Post
    Each way is easy one uses radius and the other uses diameter which is directly given in specs. Yes metric can be used in either case but need to convert all dimensions first. I think easier to use one conversion at end.

    Use which ever.

    Here is the easiest way

    http://www.ajdesigner.com/fl_engine_...splacement.php
    Thanks very much guy's

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