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Thread: another speed-o question

  1. #1
    Tuner in Training
    Join Date
    Jan 2008
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    11

    another speed-o question

    Lets say I program my car for 3.73 gears and 25" tire but the car actually has 3.23 gears and a 25" tire. Would the RPMs and MPH on the gauge cluster line up at the proper RPM/speed even though the speed is off?
    '99 Camaro Z28 A4, TSP 85mm lid, PP 85mm TB, delphi 85mm maf, LS6 intake, forged internals, 230/232 612/595 111+2 LSA, ported 853s with 2.02/1.60 valves, !egr, !air, Edelbrock LTs, 3" TDs, 3" cats, red top 30# injs, Performabuilt LVL2 trans, Yank SS3600 stall, truetrac diff

  2. #2
    Tuning Addict WS6FirebirdTA00's Avatar
    Join Date
    Jan 2005
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    Concord, NC
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    8,093
    Not sure what you are getting at here. If you put the wrong stuff in there, your speedo will be off, that is what that calibration is for.
    Sulski Performance Tuning
    2000 WS6 M6 - LS6 (long block, refreshed top end), 10.8:1 CR, 90 mm ported FAST, Exo-Skel, 227/232 cam, QTP HVMC, EWP, GMMG, 9" w/4.11s
    2018 Sierra SLT 5.3L A8 - Airaid intake tube, GM Borla catback, L86 Intake/Ported TB