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Thread: Transient impact and evap rates in graph form

  1. #1

    Transient impact and evap rates in graph form

    Pulled these figures from my stock cal just for visualization purposes. All figures are the same through the MAP range, from 20 to 100 kpa. Based on the graphs, it would seem that transients have zero effect if your IVT is above 306F, as the evap rate climbs higher than the impact rate. In this cal, both the Impact and Evap GAINS are set at 1.0 across the board, all rpms and all mass air rates. I also graphed the accel/decel modifiers, and while it is quite different at lower temps, the effect should still be definitely gone by 306 IVT. Only graphed the gas portion on this one to keep it cleaner. Just trying to learn.

    data from cal, Impact factor
    0.660 0.660 0.660 0.660 0.660 0.660 0.660 0.620 0.580 0.540 0.400 0.220 0.120 0.090 0.090 0.090 0.090

    data from cal, Evap factor
    0.081 0.081 0.081 0.081 0.081 0.081 0.081 0.084 0.086 0.093 0.109 0.146 0.209 0.282 0.315 0.315 0.315
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