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Thread: need help first start e38 boosted speed density

  1. #1
    Potential Tuner
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    Jan 2023
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    need help first start e38 boosted speed density

    new to hp tuners, need help getting the truck to start and idle for the first time so i can see if there is no leaks before taking it to a tuner
    7068 t4 t70 turbo
    80lbs smartfire injectors
    as found.hpt

    i would really appreciate the help

  2. #2
    Potential Tuner
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    Jan 2023
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    2008 gmc sierra 4.8
    sparkplugs br7ef gapped to .024

  3. #3
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
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    13,565
    Did the injectors come with data?

    I've never heard of smartfire injectors, they sound cheap to me.


    Maybe someone here can do all the changes to make it run in speed density because it would be too long to type it all out. Don't forget to list the map sensor you are running for boost.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  4. #4
    Potential Tuner
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    Jan 2023
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    Post

    they did gave me injector data GM_-_80lb (1).xlsxas found.hpt
    just that e38 injector rating maxing out at 64lbs
    i would really appreciate the help,

  5. #5
    Senior Tuner
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    Mar 2011
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    Ripley, MS
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    1,865
    Just double the stoich table and enter half of the injector flow value.

  6. #6
    Potential Tuner
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    Jan 2023
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    okay i will try that, also it seems like my map is not setting to 2bar it table goes up to 175kpa and not 210kpa