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Thread: need help changing shift RPM

  1. #1
    Tuner in Training thebrickbandit's Avatar
    Join Date
    Oct 2021
    Location
    naperville
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    29

    need help changing shift RPM

    can someone please explain how output speed works and how to calculate my car to shift at 6k at WOT thanks guys
    2010 Charger SRT8
    CAI
    CATBACK
    TUNED
    12.80s on street tires Full Weight

  2. #2
    Advanced Tuner
    Join Date
    Oct 2005
    Location
    baton rouge la
    Posts
    411
    desired shift rpm/gear ratio (trans gear ratio) = output shaft rpm

    example for 6100 shift rpm with 4.7 1st gear ratio

    6100/4.7=1298 output shaft rpm

    It will be different for each gear based on trans gear ratio