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Thread: 2020 GT500 rev limiter TCM patch

  1. #1
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    2020 GT500 rev limiter TCM patch

    After completing the TCM rev limiter patch
    does anyone know how many different places the rpm limit needs to be revised to change the rev limit to 8k rpm?

    I have revised it in as many places that I could find were applicable, but the engine still hits the limiter at 7500 rpm.
    The car is on the dyno and set to run in dyno mode.

    What am I missing here?

  2. #2
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    Send me file. And I will adjust for u

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    Senior Tuner SultanHassanMasTuning's Avatar
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    thats good start also need mpvi 2 and lastest updates

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    Quote Originally Posted by SultanHassanMasTuning View Post
    Hey thanks for the file. I tried that file and still will not rev past 7500. I also added 500 rpm to DCT upshift tables Mode 4 and Mode 5, that did not make any difference.
    I am using the latest Beta update and have MVI2 with latest updates.

    Any ideas?

  7. #7
    Advanced Tuner small tuner's Avatar
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    i did some adjustment to sultan file2020 GT500 - Rev1_8k_rpm_07May2021_8K v2.hpt
    Turbocharged COYOTE

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    Thanks I will give it a go!

    Quote Originally Posted by small tuner View Post
    i did some adjustment to sultan file2020 GT500 - Rev1_8k_rpm_07May2021_8K v2.hpt

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    That did it. Pulls all the way to 8k rpm and just layed down 745 rwhp. Thank guys!

    Quote Originally Posted by small tuner View Post
    i did some adjustment to sultan file2020 GT500 - Rev1_8k_rpm_07May2021_8K v2.hpt

  10. #10
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    Quote Originally Posted by Speed Demon View Post
    That did it. Pulls all the way to 8k rpm and just layed down 745 rwhp. Thank guys!
    Great !
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    I know that this may sound dumb, but is there any specific procedure to install the patch on a GT500? Been working with one for a long time and no matter what I do the patch never gets applied. I saw is the same usual procedure as with any other platform, but on this particular vehicle it never gets applied.

    Here is the tune for anyone who may be able to help.

    Stock Upload with TCM.hpt

  12. #12
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    Are you guys setting these to rev to 8000k rpm in another other modes besides manual paddle shift mode?

    This particular car will rev to 8k and shift up to 8k in manual mode only.

    I updated all the applicable shift tables in all modes to shift at 7950. Essentially added 500rpm to stock to shift table for throttle position 80%-100%.
    When not in manual mode it shifts at 7450 still.

  13. #13
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    Quote Originally Posted by Speed Demon View Post
    Are you guys setting these to rev to 8000k rpm in another other modes besides manual paddle shift mode?

    This particular car will rev to 8k and shift up to 8k in manual mode only.

    I updated all the applicable shift tables in all modes to shift at 7950. Essentially added 500rpm to stock to shift table for throttle position 80%-100%.
    When not in manual mode it shifts at 7450 still.
    I got it figured out.

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    What did you find?

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    I am also not able to apply the patch. I've tried the latest stable and beta, any ideas?

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    Quote Originally Posted by Quicksand Jesus View Post
    I am also not able to apply the patch. I've tried the latest stable and beta, any ideas?
    I opened a case and the response from engineering was that even if it doesn't appear to be applied, it is applied. Haven't tested it yet.

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    Quote Originally Posted by Charlie540i View Post
    I opened a case and the response from engineering was that even if it doesn't appear to be applied, it is applied. Haven't tested it yet.
    Thanks for the reply, I tried that and it put the car into an error mode and would not start. I flashed the old file back and it was fine. Maybe there is a problem with the version of HP Tuners I'm using.

  18. #18
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    I've updated to the latest beta. I still cannot seem to raise the rev limit, even by using the values that are shared in this thread.

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    Quote Originally Posted by Quicksand Jesus View Post
    Thanks for the reply, I tried that and it put the car into an error mode and would not start. I flashed the old file back and it was fine. Maybe there is a problem with the version of HP Tuners I'm using.
    Good to know. Guess I'll have to keep bugging them with the issue. Try opening up a ticket with support.

  20. #20
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    Quote Originally Posted by Charlie540i View Post
    Good to know. Guess I'll have to keep bugging them with the issue. Try opening up a ticket with support.
    Thanks! I did that on Saturday and they are aware of the issue and working to correct it.