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Thread: Supercharged G8 GT - Fast Torque Exit TM Adjustments

  1. #1

    Supercharged G8 GT - Fast Torque Exit TM Adjustments

    Can anyone offer any suggestions or reference links for how to adjust Fast Torque Exit torque management settings? I have a supercharged G8 GT that has been suffering from a lot of torque management if I command a manual downshift and apply throttle before the shift has completed. It often takes 2 or 3 seconds for power to be returned, and it's pulling over 200 ft.lbs.

    I have scanned the torque management PIDs and discovered that Fast Torque Exit torque management is pulling fuel, throttle, and spark. I'm looking for tips on how to adjust the settings (even on an iterative basis) without adversely affecting my downshift rev matching. Can anyone offer any suggestions for how to approach this? I have found a few posts here and there that note a few things, primarily an explanation of what it is and how it works in conjunction with the blip downshifting on automatics, but no suggestions for how to adjust it. Any help would be appreciated. If it would be of help, I could post a scan and/or tune. Thanks.

  2. #2
    Senior Tuner DSteck's Avatar
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    Disable it completely. Turning off the fuel cut end of it will help a lot, but leaving spark reduction enabled still results in a huge bog usually.

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  3. #3
    Thanks. I assume that disabling it completely would be achieved by setting the following:

    Enable Torque Delta = 6042
    Disable Torque Delta = 6042
    ETC Torque Limit = 6042
    Use Fuel Cut = Disable
    Use Spark = Disable

    Will disabling this have any adverse effect on the blip downshifting or any light/closed throttle manual downshifts?

  4. #4
    Senior Tuner DSteck's Avatar
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    Setting both to disabled is sufficient.

    Try it and see.

    DSX Tuning - Authorized HP Tuners Dealer
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    http://www.facebook.com/dsx.tuning
    Just say no to bull s***.
    IF YOU WANT HELP, POST A FILE!

  5. #5
    Thanks. I think first I'll try using the enable and disable torque settings from the 2012 Corvette A6, which seem to be less obtrusive, and disable the fuel cut option since I hate the idea of leaning out. If that cleans up the majority of it I'd be happy. If it doesn't, I'll try disabling it completely. However, if I would just adjust the two switches, would it not still use the ETC for TM purposes since the ETC TM Source PID also showed Fst TqExit as inducing TM when I logged the issue?

  6. #6
    Well, I tried out the Corvette settings with the fuel cut disabled, but it felt pretty much the same as before. I then doubled the enable torque delta value, but it still felt the same, which makes sense since I was still exceeding that torque delta by a fair margin. I ultimately disabled the fast torque exit TM completely. There is still a fair bit of power pulled for about a second after the shift seems to complete, which might just be clutch control TM that had to recalculate due to the increase in demanded torque, but it returns full-on rather than a slow ramp. I'm still going to scan it to see if there's still some background fast torque exit TM acting as I had read that the settings are more of suggestions rather than complete controls, then go from there. At any rate, it's not perfect, but it's certainly a great improvement from before and has had no effect on the downshifts under throttle, nor closed throttle rev matching downshifts. Thanks for the suggestions!