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  1. #1

    Default Drag Racing Gear Formulas

    Formula for max mph with gears:

    (tire height x rpm's) / (gear ratio x 335)



    Formula to tell if you have the right ratio for the 1/4:

    ET x MPH = 1335, if higher than 1335 you need more gear, if lower you need less.


  2. #2
    boosted hp's Avatar
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    Oct 2004
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    Default

    That doesnt seem right......I have 4.56s and its say I need more?
    battery relocation kit?

  3. #3

    Default

    It's a pretty "general" formula. It doesn't take certain things into account, and I'm sure is geared towards cars running slicks.


  4. #4
    Banned Brandon's Avatar
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    Mine came out to 1337.8

  5. #5

    Default

    That's pretty much dead on.

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