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Thread: Changing Stoich in $0D

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  1. #1
    RIP EagleMark's Avatar
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    It won't change how engine runs. Just how the ECM/PCM starts it's fueling calculation. The only thing that will change is BLM readings from having a proper starting point.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  2. #2
    Fuel Injected! brian617's Avatar
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    Quote Originally Posted by EagleMark View Post
    It won't change how engine runs. Just how the ECM/PCM starts it's fueling calculation. The only thing that will change is BLM readings from having a proper starting point.
    Thats the way I understood it after searching and reading today. And since I haven't adjusted my fuel tables yet I thought I would make the correction to the AFR before I corrected the BLMs.

    Again I dont see where to change it, in my Engine Constants all I have is Injector Flow Rate and Cylinder Volume.

    Is it something I have to add in?
    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
    RIP EagleMark's Avatar
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    That's where it is in my $0D which is not stock, I re-organized and made it simpler. Use Tools, Parameter Finder and search for it. "Stoichiometric AFR"

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  4. #4
    Fuel Injected! brian617's Avatar
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    Did the search and found it only under "Open Loop AFR Parameters"?
    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

  5. #5
    RIP EagleMark's Avatar
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    So why the question?

    Like I said I've moved a lot around in mine from stock $0D. But there's only one.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  6. #6
    Fuel Injected! brian617's Avatar
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    I guess I just assumed it would only apply to open loop and not work in closed loop?
    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

  7. #7
    RIP EagleMark's Avatar
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    The other way... this is the target for Closed Loop. In Open loop there is a seperate table.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

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