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Thread: Rocker arm ration conversion formula?

  1. #1
    Join Date
    Jul 2018
    Posts
    1

    Default Rocker arm ration conversion formula?

    There was a formula posted fairly recently for converting the valve lift when changing from 1.5 to 1.6 ratio rocker arms on a SBC. I think it was BLAZIN 72 that posted it. Anyone know it? Thanks.

  2. #2
    Join Date
    Jan 2010
    Location
    Brisbane, Australia
    Posts
    938

    Default

    Valve lift x 1.6 / 1.5.
    eg: .570 x 1.06666 = .608
    Regards

    Gary

  3. #3
    Join Date
    Jul 2018
    Location
    Virgin Islands
    Posts
    3

    Default Rocker arm ration conversion formula

    Does anyone know for sure what size bolt the rocker arm hold down bolt in the head of a 3300 is? Also the torque value?

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