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Thread: help tuning G8 V6

  1. #1
    Advanced Tuner
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    help tuning G8 V6

    I realize this isn't the proper forum, however these cars use the bosch style controller so I figure you guys will know best.

    I'm scheduled to tune this thing on the dyno, I'm not concerned about the obvious stuff all of that will be taken care of on the dyno. I'm more concerned about the lag I'm seeing between converter stall 2150 rpm and about 2700 rpm. I see airflow shoot up sharply at that point. I can't get rid of the lag no matter how I change the load tables. I'm wondering if the lag is from the cams, just want your opinions.

    09 g8 v6 ray after cam fix 4.hptray 14.hpl

    The car has cams, cold air and headers.
    2018 Camaro SS, Maggie 2650, 103 TB, Big Gulp, E85

  2. #2
    Advanced Tuner
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    Tuned the car on the dyno. Cam timing, a/f, spark, nothing changes the lag at all.

    I've gone up and down and back on the load tables, I cannot get it to change at all.

    ANYBODY???

  3. #3
    Senior Tuner cobaltssoverbooster's Avatar
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    Dec 2008
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    if nothing helps you then the converter may have a higher stall rating.
    How did you verify the converter stall point if you dont mind me asking?
    2000 Ford Mustang - Top Sportsman

  4. #4
    Tuner
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    Have you tried returning to factory air load tables?

    I noticed a bad lag off the line even under normal throttle when trying to increase the desired air load table to improve throttle response. I'd notice timing advance dip and then return to normal after a few seconds. I'm sure there's something we don't have access to.

    Also have you noticed that the cam angle tables don't work at WOT?