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Thread: 2018 3.6 Pentastar Pro-charger highway lugging

  1. #1

    2018 3.6 Pentastar Pro-charger highway lugging

    Does anyone have experience with 3.6 Procharged (or RIPP) lugging on highway.

    Driving around 70-75, 8th gear, 1800rpm, 20% throttle. Come up to a hill - give 30% throttle. No acceleration - just slight "misfire" feeling. More throttle (40%) makes it downshfit.

    Tune is based on RIPP file posted here.

    Transmission tune is untouched.

    Any help will be appreciated. What am I missing?

    Do I need to make trans adjustments to compensate for blower load?
    Do I need to make throttle response higher?
    Torque table?

    Otherwise, car runs good, and makes good power.

    P1sc, DW 95lb injectors, GM 3 bar map.

    Original read and tune attached.
    Attached Files Attached Files

  2. #2
    Advanced Tuner
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    Do you have a log? I've fought a few supercharged Jeeps with the 3.6
    From talking with some other tuners it appears as though the 3.6 PCM has issue transitioning from vacuum to boost under light throttle. No issues when driven a little harder, but at those cruising speeds they seem to have issues.

    Just wondering what your MAP readings are when you're having the issues

  3. #3
    Advanced Tuner
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    Quote Originally Posted by MoBoost View Post
    Driving around 70-75, 8th gear, 1800rpm, 20% throttle. Come up to a hill - give 30% throttle. No acceleration - just slight "misfire" feeling. More throttle (40%) makes it downshfit.
    .
    A detailed log highlighting these issues would be your best course for help.

  4. #4
    Senior Tuner
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    Mar 2022
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    It's probably because the cam angles are setup for NA (too much overlap).

    And the neural network hasn't been tuned. Perhaps try disabling and doing regular VE tuning.
    Last edited by SiriusC1024; 11-17-2022 at 02:50 AM.

  5. #5
    Quote Originally Posted by white1 View Post
    Do you have a log? I've fought a few supercharged Jeeps with the 3.6
    From talking with some other tuners it appears as though the 3.6 PCM has issue transitioning from vacuum to boost under light throttle. No issues when driven a little harder, but at those cruising speeds they seem to have issues.

    Just wondering what your MAP readings are when you're having the issues
    Logs show everything peachy. 20deg of timing, still in closed loop.
    Took the blower belt off and open throttle body - still does it.
    MAP reads 105kpa when it does it.

  6. #6
    Quote Originally Posted by SiriusC1024 View Post
    It's probably because the cam angles are setup for NA (too much overlap).

    And the neural network hasn't been tuned. Perhaps try disabling and doing regular VE tuning.
    Tried the cams stock or how RIPP does it - no change.

    Turned off NN and went VE - no change.

  7. #7
    Quote Originally Posted by HaasExp View Post
    A detailed log highlighting these issues would be your best course for help.
    Log and VE tune attached.

    It is doing it from 1.22-1.27

    Is non dodge MAP freaking out sensed map logic?
    Attached Files Attached Files