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Engine size and CR calculator

This is a discussion on Engine size and CR calculator within the Internal Engine forums, part of the LSx Technical Help Section category; Hiya guys, I was doing some research compression calculations and came across a rather informative site : http://www.angelfire.com/fl/procrastination/motor.html . You ...

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    GM made me do it!! IT_SS's Avatar
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    Engine size and CR calculator

    Hiya guys,

    I was doing some research compression calculations and came across a rather informative site : http://www.angelfire.com/fl/procrastination/motor.html.

    You basically enter your Bore, Stroke, how many cylinders (I'd imagine you all have 8 lol), Combustion Chamber volume, Piston dome (or dish) and gasket thickness. Then hit the 'Compute' button. It seem pretty accurate, but I have yet to compare it to the actual formula for figuring CR's.

    My input .::.
    Piston size in inches :: 3.900" (stock)
    Stroke in inches :: 3.620" (stock)
    Number of cylinders :: No brain(er)
    Combustion Chamber in cc :: 72 cc
    Piston dome in cc's :: -2.2
    (Dome = positive,
    Flat = 0, dished = negative number)
    Gasket Thickness in inches :: 0.052''

    Output .::.
    Displacement :: 346"^3 (wow, didn't see that one coming) or 5.67 LI
    Compression Ratio :: 9.3.....

    so it seems like a pretty useful tool....

    I've also posted this on LS1Tech.com as well as SmokinVette.com
    Information Technology Super Sport

    Suspension|T56|5.3|Twin TC66's|

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    Junior Member moez28's Avatar
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    Navy Blue Metallic
    1998 Camaro Z28

    Stroke is 3.622"...

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