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Thread: Corvette C7 how to turn off Speed limiter??

  1. #1

    Corvette C7 how to turn off Speed limiter??

    We have Corvette C7 LT1 + Procharger SC kit installed, the car run just fime, untill about 300km/h, and then it hits the limiter, i tryed everything in the ECU software to turn it off, but it feels like it has speed limiter elsethere in the system((( anybody can help with it?


  2. #2
    Join Date
    Dec 2019
    Got a tune to post up?
    Is that a E92 ECU?

  3. #3
    Yes, its E92 ecu, i tried everything in the Speedo page to raise all limits up to 317mph, as well as put Condition: Enable RMP up to 7000rpm so it never worked at all, but it still Limits the car on the same speed independant on load and gear (((

  4. #4
    Advanced Tuner
    Join Date
    Aug 2014
    Central, LA
    Post the tune

  5. #5
    Please see this
    Attached Files Attached Files

  6. #6

  7. #7
    Potential Tuner
    Join Date
    Nov 2016
    Quote Originally Posted by Stez View Post
    Please see this
    Change the limiter source to GMLAN .

  8. #8
    Advanced Tuner mbray01's Avatar
    Join Date
    Dec 2013
    Pearl River, La.
    the problem is likely due the ecm not liking the number just being maxed out. Generally speaking if you go through gm calibrations, the number that is predominantly used is 217mph/350kmh.
    use that number and i would bet its fine after.
    speed limiter needs to be set to calibration, gmlan will allow other controllers to control limiter
    Michael Bray
    Rusty Knuckle Garage
    Slidell, Louisiana
    15yr Master Tech.
    Custom Car Fabrication, Customization, High Performance.
    GM World Class Technician
    Shop Owner

  9. #9
    i did tried to change to Calibration and GMLAN... that doesnt helped (( will try to put 217mph number... i hope it will help somehow, but i guess i tried that as well... could be the problem elsethere except this Speedo section? may be somethere in Transmission controller or other one?
    Last edited by Stez; 01-17-2020 at 04:27 AM.

  10. #10
    Potential Tuner
    Join Date
    Nov 2019
    Chattanooga, Tennessee
    Here's mine from 2018 Z06
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