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Thread: How to log ignition timing when DoD enabled?

  1. #1
    Tuner in Training
    Join Date
    Apr 2023
    Posts
    15

    Question How to log ignition timing when DoD enabled?

    I'm trying to tune an L83 in V8 and V4 mode, but I haven't been able to figure out how conditionally filter my logs in VCM Scanner.
    I do see the "Displacement on Demand Requested" variable, and I'm logging it, but it doesn't seem possible to use this variable as a conditional filter!

    My V8 spark map is pretty close, but I think the V4 is knocking in some spots.

    On a side note I've had great success improving the V4 operation to have more power and actually stay in V4 mode, below 65 MPH / 105 km/hr it will stay in V4 continuously under cruise and around town it will essentially operate in V4 mode, even under light acceleration.

    Thanks!

  2. #2
    Tuner in Training
    Join Date
    Apr 2023
    Posts
    15
    I figured it out.
    By taking the calculated V8 cylinder air mass and dividing by the actual cylinder air mass and then filtering greater or less than 0.6 I was able to divide out V8 and V4 data into separate tables.