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whats my c/r

This is a discussion on whats my c/r within the Internal Engine forums, part of the LSx Technical Help Section category; i have a bore of 4.030 4in stroke, deck heigh of .012 out the hole and 70cc combustion chamber i'm ...

  1. #1
    The Masterpiece Qwk94Z28's Avatar
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    SOM
    1998 Z28-408 l92 stroker

    whats my c/r

    i have a bore of 4.030 4in stroke, deck heigh of .012 out the hole and 70cc combustion chamber

    i'm gonna be running ls7 headgaskets but i'm not sure how thick they are compared to ls2 or ls1 gm gaskets

    ball park figure? 11.4:1?

  2. #2
    Senior Member bills98ta's Avatar
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    1998 Trans Am

    You want a .040 - .045 quinch height so I'd get a head gasket around .055" thick compressed. Assuming flat top pistons, your probably correct on the CR !

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    Member kev70ss's Avatar
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    Pewter
    2000 Camaro ss

    Theres a free program called virtual engine calculator, download that and you can plug any numbers you want, then it will tell you the compression
    http://www.virtualengine2000.com/index.htm

  4. #4
    The Masterpiece Qwk94Z28's Avatar
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    SOM
    1998 Z28-408 l92 stroker

    yep flat top pistons with -1.8cc valve reliefs

    does anyone know where i can find the thickness of the ls7/ls2 headgaskets i did a goodgle but no luck and i'm trying to order up a gasket since a ls7 is only 35 bucks a piece

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    Slow'er'Ass Mr. Luos's Avatar
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  6. #6
    Senior Member bills98ta's Avatar
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    SWEET !!! Bookmarked !!!

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