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Thread: Open loop AFRs based on...

  1. #1
    Fuel Injected! brian617's Avatar
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    Open loop AFRs based on...

    ...closed loop VE? Correct me please if i'm wrong but in order for the PCM to calculate open loop AFRs it would first need a known closed loop stoich value ie VE? And in order to get commanded open loop AFRs one must have a solid VE table? Tune is getting so much better, just need a little cold start fine tuning.
    89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
    95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
    05 Outback XT 2.5L turbo gas auto

  2. #2
    Fuel Injected! brian617's Avatar
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    Dang, did I make you guys mad? lol

    Can anyone confirm this?
    89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
    95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
    05 Outback XT 2.5L turbo gas auto

  3. #3
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    no..... you had the idea in post #1.

    i could have sworn i saw replies in this thread the first time i looked....

    but anyways, yes, get EVERYTHING done and dialed in at full operating temp first, then deal with cold temp compensations. otherwise, you'll chase your tail trying to get both situations happy.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  4. #4
    Fuel Injected! brian617's Avatar
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    Thanks! Think i'm finally figuring this stuff out. I was going in circles for a while there and that's when I tried to make some sense of it.
    89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
    95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
    05 Outback XT 2.5L turbo gas auto

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