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Thread: Sizing of internals

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  1. #1
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    Sizing of internals

    I can't say I know what size crank, rods and pistons equal how many cubic inches are in an engine. I know I'm not the only one curious about this so how many sizes do you all know. I read on the discussion board that a 383 goes like this:

    383
    -4.000" crankshaft
    -6.125" connecting rods
    -3.905" pistons

    Whatcha guys got?

    ~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~

  2. #2
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    http://www.ls1truck.com/forums/mecha...re-stroke.html

    you're welcome

    edit: i read it again and ^^^^thats not entirely what you are asking. i'm tired. homework sucks
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  3. #3
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    Quote Originally Posted by jetmech View Post
    I can't say I know what size crank, rods and pistons equal how many cubic inches are in an engine.
    Well, as far as I know, there are only 2 measurements that compose the C.I. of a motor...bore and stroke.

    Using a 5.3L motor:
    To find the Liters of displacement from C.I., divide C.I. by 61.0237.
    EX: 325 / 61 = 5.3

    To find C.I. from a motor's bore and stroke, take the bore squared, multiply the stroke, multiply that by 0.7854, then multiply that by the number of cylinders.
    EX: (3.779x3.779) x 3.622 x .7854 x 8 = 324.9999 ~ 325.

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