2 bbl compression

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  • Master X
    Senior Member
    • Sep 2007
    • 110

    #1

    2 bbl compression

    I'm taking my 4 bbl engine and moving it down to a 2 bbl class. I've changed everything that I need to but am not sure if I have to much compression for a 2 bbl.

    393 with dart 200 runner heads, hogged out cast 2 bbl intake, 650 cfm 2 bbl Holley carb and the pistons make it 14:1. Is 14:1 too much?
  • Egoracing
    Senior Member
    • May 2007
    • 4852

    #2
    With a 2bbl the engine will not get enough air to realize the total compression, Many 2bbl motors are 17:1 and up because of this fact.

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