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  1. #1

    Default Quench and compression ratio ?

    I have just bought a 383 with dished -16cc srp pistons. They are in the hole .025 now. My heads are 55cc ported stockers.

    If I deck the block to .005 deck height, use .029 gasket, on these dished -16cc pistons my quench would be .034, with compression at 11.03. (quench - .034, compress - 11.03)

    If I get flattop piston at -5cc, deck height of .015, gasket of .026, my quench would be .041, and compression of 12.43. (quench-.041, compress-12.43)


    The more I attempt to bring down the compression, thru gasket and deck height changes, the more I lose the quench. I really don't want to be over 12:1 cause I don't want to have to depend on a spot-on tune or else damage. I'd rather be a little safe on it as opposed to squeezing everything to the edge. What is it I need to be more focused on? How do we get there? Deeper valve cut flattop?

    Thanks,
    Darrell
    '94 Formula m6: AI 200cc h/c - MWC - Moser 12bolt

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