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Thread: Airflow limit in Speed Density??? Doesnt do it in MAF only

  1. #1
    Senior Tuner
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    Jun 2004
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    Airflow limit in Speed Density??? Doesnt do it in MAF only

    Been chasing my tail, thinking it was a torque value thing (calc torque down from 990s to near 700s and still did it) then maybe a gms/cyl thing (no because in MAF mode went well into the 2.x gms/cyl)

    Hiwaytest6ongate was a normal pull no wierd stuff at 192kPa

    Hiwaytest10ongate hit whatever cutoff, VE reported freezes at 67.72 lb/min, Dynamic increases to 80# then all sudden cuts back down to 30.6 and so does VE reported lb/min, AND the raw VE value doesnt read what the table says it should anymore, inj pulse obviously tanks, g/cyl dumps so it throws ton of timing in it etc etc. Seems to happen around 240kPa everytime, if contoller is set and just hits 235kPa made bunch of pulls no problem

    WTF log is in MAF only, for some reason controller was acting funny and only engaged at 2:40 mark. Other than Torque Management yanking out a ton of timing in the pull, fuel kept increasing, as did everything else (until it hit HPT max reported limit of 255 kPa - is there a way to log that accurately?)

    HPT cant show more than 255kPa on scanner if I remember right (is there a way to log that actual value correctly?) but what other hard ceilings in calculation should there be?
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