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Thread: 2016 Mustang GT "ENIGNE SPEED LIMIT" under Torque Source

  1. #1
    Tuner in Training
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    2016 Mustang GT "ENIGNE SPEED LIMIT" under Torque Source

    I posted on here a while ago but didn't really get any responses. I'm a lot more experienced no but still haven't figured this out. I've talked to several well known tuners, HPTuners and Ford Performance and no one can give me an answer.

    Gen 2 coyote with a 6R80, shifts fine on every shift besides the 4-5 shift. Commanding shifts at equivalent to 7,500-7,700RPM and works fine aside from the 4-5 shift. It hits a hard limiter at 7,000 (Most of the time, sometimes a smidge higher) and the torque source goes from "Driver Demand" to "Engine Speed Limit" and closes the throttle, hits the limiter a couple of times and shifts into 5th. I've changed the obvious RPM Limits in the tune with no luck. I also raised the "Lower Clip" to 3,000 RPM and it still does it.

    Any help is much appreciated.
    Duggan Racecraft

    2023 F-150 4x4 5.0
    2018 F-150 4x4 5.0 (Basic Bolt Ons)
    1978 Mustang King Cobra (Gen 2 Coyote/6r80 Combo/Predator Supercharger)
    1982 Mustang GT (Stock Long Block w/ T5 Swap)

  2. #2
    Tuner in Training
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    Jun 2022
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    Here is a few data logs:

    limiter 1.hpllimiter 2.hpl
    Duggan Racecraft

    2023 F-150 4x4 5.0
    2018 F-150 4x4 5.0 (Basic Bolt Ons)
    1978 Mustang King Cobra (Gen 2 Coyote/6r80 Combo/Predator Supercharger)
    1982 Mustang GT (Stock Long Block w/ T5 Swap)

  3. #3
    HPT Employee Eric@HPTuners's Avatar
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    Quote Originally Posted by DugganRacecraft View Post
    I posted on here a while ago but didn't really get any responses. I'm a lot more experienced no but still haven't figured this out. I've talked to several well known tuners, HPTuners and Ford Performance and no one can give me an answer.

    Gen 2 coyote with a 6R80, shifts fine on every shift besides the 4-5 shift. Commanding shifts at equivalent to 7,500-7,700RPM and works fine aside from the 4-5 shift. It hits a hard limiter at 7,000 (Most of the time, sometimes a smidge higher) and the torque source goes from "Driver Demand" to "Engine Speed Limit" and closes the throttle, hits the limiter a couple of times and shifts into 5th. I've changed the obvious RPM Limits in the tune with no luck. I also raised the "Lower Clip" to 3,000 RPM and it still does it.

    Any help is much appreciated.
    Raise it to 8000 and report back.
    Eric Brooks
    HP Tuners, LLC

  4. #4
    Senior Tuner veeefour's Avatar
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    4-5 is more prone to "lower clip", not sure why tho. Still don't fully understand what this parameter do exactly.