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Thread: *NEW* Duramax Injection Timing Calculator

  1. #1
    Potential Tuner
    Join Date
    Sep 2022
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    Alberta, Canada
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    Lightbulb *NEW* Duramax Injection Timing Calculator

    I have been working on a new injection timing calculator for a while now. It's easier to follow than some of the older ones floating around. The spreadsheets calculate the actual injector pulse width that is being used based on your injection pressure, injection duration and injection BTDC (%) based on your current timing. Currently, the spreadsheet calculates timing for the following Duramax:
    LB7 & LLY
    LBZ & LMM
    LML
    L5P

    I will add others once I can get my hands on some stock files.

    EDIT: v1.0.2 - fixed a couple mistakes with L5P calculator
    EDIT: v1.0.3 - fixed missing column on LBZ fuel pressure table
    Attached Files Attached Files
    Last edited by Braden_P_F; 03-13-2024 at 10:28 AM.

  2. #2
    Tuner in Training
    Join Date
    May 2023
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    15
    Looks very nice. Only problem is that on my lbz the pulsewidth table uses kpa instead of mpa. When I paste the data in it causes err:502 in the calculated pulsewidth table below it. Am i doing something wrong?
    Looks like you did a lot of work on this. Thank you for freely sharing.

  3. #3
    Potential Tuner
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    Sep 2022
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    Alberta, Canada
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    The units can be changed simply by right-clicking on the table in HPT, I chose Mpa as it is much simpler to have 2 or 3 digits instead of 5 to 6. I also cannot replicate your error, I looked up that error. It has something to do with an invalid argument. Are you copying your entire pulsewidth table into the spreadsheet?

  4. #4
    Tuner in Training
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    May 2023
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    I think the problem was that my base pressure table had an extra column in it and it pushed the data past the end of the table in the spreadsheet. I modified that and it seems to work ok now. thank you.

  5. #5
    Tuner in Training
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    May 2014
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    13
    Your missing the 95 column in the fuel pressure table

  6. #6
    Potential Tuner
    Join Date
    Sep 2022
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    Alberta, Canada
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    Thankyou for pointing that out, I added the missing column to v1.0.3

  7. #7
    Advanced Tuner
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    Jan 2006
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    DFW
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    Thank you for sharing this with us!
    2008 Denali XL AWD LSA Blower
    2010 CTS-V
    2005 LLY Duramax SAS
    2015 Denali