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Thread: New to Tuning, Struggling with VE adjustments

  1. #11
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    When I was logging/viewing the data on my laptop it was reading WB, but I noticed today that when I played it back it wasnt showing that it had logged it. I will change those couple things though and check out my WB settings, log it again and then post it up again.

    Thanks!
    2011 6.7 Cummins, ARP 625's, 5" Flo-pro, S&B, Some Carli stuff, 35's

    2008 5.3L Chevy, Long tubes, CAI, 220 cam, 4.11's

  2. #12
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    Okay, re-logged the truck, and I believe I have everything set up right. Take a look at this log and see what you think. It appears to "correct" to me.


    Thanks again.
    Attached Files Attached Files
    2011 6.7 Cummins, ARP 625's, 5" Flo-pro, S&B, Some Carli stuff, 35's

    2008 5.3L Chevy, Long tubes, CAI, 220 cam, 4.11's

  3. #13
    Joe (Moderator) joecar's Avatar
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    V8 S&T -> F6:Devices -> F8:Serial I/O

    post a screenshot of ^ this.

  4. #14
    Lifetime Member swingtan's Avatar
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    WB data is fine, GM.APCYL_DMA is missing though..... You need this for the VVE MAP. Other than that, I think it's all there.

  5. #15
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    Here is that screenshot.
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    2011 6.7 Cummins, ARP 625's, 5" Flo-pro, S&B, Some Carli stuff, 35's

    2008 5.3L Chevy, Long tubes, CAI, 220 cam, 4.11's

  6. #16
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    Okay, I think I have got it figured out and have been making some VE changes to the map. Im curious how many logs its going to take before I it right? Im on my 5th VE map adjustment right now.
    2011 6.7 Cummins, ARP 625's, 5" Flo-pro, S&B, Some Carli stuff, 35's

    2008 5.3L Chevy, Long tubes, CAI, 220 cam, 4.11's

  7. #17
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    I have also noticed that my ethanol content is always 23.5%. This seems pretty high, upon further research I see that it is a calculated value. Is there any way to keep it calculating even with the fuel trims turned off? Its affecting my commanded afr by keeping it at 13.2
    2011 6.7 Cummins, ARP 625's, 5" Flo-pro, S&B, Some Carli stuff, 35's

    2008 5.3L Chevy, Long tubes, CAI, 220 cam, 4.11's

  8. #18
    Joe (Moderator) joecar's Avatar
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    If you don't have the alcohol content sensor, then the trims are used to calculate it...

    With a alcohol kit ($10) you can determine the actual alcohol % content in a sample from your fuel tank...

    the difference between this measured % and 23.5% is the difference in your VE that needs to be corrected (you're MAF-less, right...?).


    How are you using LTFT with wideband...?

  9. #19
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    I am tuning in the VE mafless yes. I am not using LTFT with wideband, I am running in open loop all the time right now.
    2011 6.7 Cummins, ARP 625's, 5" Flo-pro, S&B, Some Carli stuff, 35's

    2008 5.3L Chevy, Long tubes, CAI, 220 cam, 4.11's

  10. #20
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    What can I post that will let you guys know if im on the right track? First tune, and current tune? Log files?
    2011 6.7 Cummins, ARP 625's, 5" Flo-pro, S&B, Some Carli stuff, 35's

    2008 5.3L Chevy, Long tubes, CAI, 220 cam, 4.11's

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