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Thread: Need histogram for inj duty cycle in boost

  1. #1
    Potential Tuner
    Join Date
    Oct 2008
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    8

    Need histogram for inj duty cycle in boost

    Just switched to 2-bar os. and logging to set VE tables
    Inj duty cycle chart only goes to 105kpa
    Cant find one for boost in the forums
    Dont know how to write one
    Please help

    Scan of inj duty cycle is 95 at 105kpa
    I think I will need a better fuel system


    Mods are:
    05 gto stock motor with cam
    maggie 112 5-psi with magna volt
    kook headers with SLP
    Spec 3 clutch
    with maggie tune 12.50 1/4 mile at 113mph

  2. #2
    Senior Tuner 5_Liter_Eater's Avatar
    Join Date
    Nov 2005
    Location
    Houston, TX
    Posts
    3,968
    I don't see why you would need to plot IDC against the MAP. If you're out of injector id don't matter what MAP it happens at. I have an IDC chart on my dashboard with a warning set at 90%. Then you could add it to the chart display so you can see where it maxes out and at what RPM/MAP.
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  3. #3
    Potential Tuner
    Join Date
    Oct 2008
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    8
    Thanks for the reply. I just wanted to know what the duty cycle was in boost. My afr was still good. I was commanding 11.4 at wot but my wideband was at 10.3. I still need to adjust the ve table. I am just getting started on this tune. Thanks again

  4. #4
    Potential Tuner
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    Oct 2008
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    The idc was 95 at 6600rpm
    What is the max idc to run

  5. #5
    Advanced Tuner
    Join Date
    Aug 2007
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    503
    I remember running like 130% duty cycle on my dsm for years

  6. #6
    Senior Tuner S2H's Avatar
    Join Date
    Apr 2005
    Location
    Schexnayder Racing - Arnaudville LA
    Posts
    4,387
    Safe max is 80%
    Above that you should get bigger injectors

    Anything above 100% means the injector is wide open....
    -Scott -

  7. #7
    Potential Tuner
    Join Date
    Oct 2008
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    8
    I just figured out how to make a histogram for boost IDC
    Here it is if anyone cares