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Thread: Bog/flat spot

  1. #1
    Tuner in Training
    Join Date
    Nov 2021
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    15

    Bog/flat spot

    Been trying to get this tune by looking at others and its is a lot better. No more codes. starts and runs good. It has a blower cam and no blower yet. (back ordered) .615 lift in and ex. 117 lobe seperation.

    At 2,000 rpms I go WOT and it just sits there. Let off just a touch and she takes off. I've attached tune and 2 scans. Any ideas would be great. Sometimes she just rips. Only 120 miles since rebuild.

    Jon
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  2. #2
    Advanced Tuner 4wheelinls1's Avatar
    Join Date
    Jun 2009
    Location
    Melbourne Australia
    Posts
    284
    You have some variable cam still you would be better tuning the Neural network. A fixed VE table will never be great with changing VE.

    The log indicates sometimes the throttle is opening at 100% pedal and at other times not, log the torque sources/limiters. Is traction control on?

  3. #3
    Tuner in Training
    Join Date
    Nov 2021
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    15
    Quote Originally Posted by 4wheelinls1 View Post
    You have some variable cam still you would be better tuning the Neural network. A fixed VE table will never be great with changing VE.

    The log indicates sometimes the throttle is opening at 100% pedal and at other times not, log the torque sources/limiters. Is traction control on?
    Thanks. I fixed most of it by changing max airflow to 100lbs/min. I do drive with TC on. Its to low of an RPM to spin the tires. But good idea about logging the trq limits. I also will see if the TB is not opening all the way. I thought I noticed it once.

    This tune is temperary. I agree NN is probably a better way. In the furure for sure.

    Jon