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Thread: Borderline spark load axis change

  1. #21
    Advanced Tuner
    Join Date
    Jul 2009
    Posts
    326
    2.4 will happen.

    In stock from the speed density model is very different between the BA/BF, FG XR6T and FG F6. The BA/BF in stock form will go to just over 2.6 depending in barometric pressure. Whereas the FG's won't make it this high due the the different SD values. Note that the FG XR6T and F6 values are different (mechanical reasons).

    If you tune your FG model to reflect true airflow and you're not fudging your high slope you WILL end up with quite a high load value.

    So in short the load is never a fixed value and is determined by airflow that is calculated from the t-MAP and SD values.

    Some things to note is that the load values and therefore timing can't be compared between a B and F series. If you use B series load / timing in an FG without true airflow calibration you will be hearing marbles. This also explains why you see tunes with a lower high slope in the F series compared to the B series....given the same injector.

  2. #22
    Advanced Tuner
    Join Date
    Jul 2009
    Posts
    326
    image.jpgimage.jpg

    Livelink GenII does histogram logging which is handy. You can set up a logging table to present like a spark table for example (see attached - I have added meaningless load value just to show which cells I'm hitting). This car is pegging the t-MAP.