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Thread: E38 SD tuning help

  1. #1
    Potential Tuner
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    Jun 2019
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    E38 SD tuning help

    I am working on a 2008 silverado E38 PCM with the 2 bar OS. Truck has FIC 850cc injectors due to the hard limit on the flow rate table I did the double stoich half IFR method. My question is what histogram would you use to scale the VE table since I?m assuming AFR error will not be accurate due to doubled stoich? Any help appreciated, thank you!

  2. #2
    Advanced Tuner
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    Apr 2011
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    I dont think you need to scale anything. Your not effecting map by scaling the injectors at all. Just retune the airflow model

  3. #3
    Tuning Addict 5FDP's Avatar
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    Just switch to using lambda error.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

  4. #4
    Potential Tuner
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    Quote Originally Posted by 5FDP View Post
    Just switch to using lambda error.

  5. #5
    Potential Tuner
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    I?ve always used AFR error how would you setup a lambda error histogram?

  6. #6
    Advanced Tuner
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    Dec 2011
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    Amarillo, TX
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    change your wideband transform from AFR to lambda, Then edit your AFR error histogram to use lambda error math instead of AFR error.
    JTC Performance - Authorized HP Tuners Reseller
    Performance Tuning in the Texas Panhandle