Results 1 to 6 of 6

Thread: 5.3l SD Start up tune?

  1. #1
    Tuner in Training
    Join Date
    Feb 2021
    Posts
    25

    5.3l SD Start up tune?

    Hey everyone, new to the forum and HPTuners. Early this summer I will be completing a 5.3L turbo ls swap in my 2016 Subaru BRZ. I have an E38 ECU. As of right now I don?t have the tune file that?s on it nor do I know what vehicle it came out of. I believe it was a truck though.
    I?m looking to run flex fuel with an ethanol content sensor, speed density, with an OEM LSA MAP sensor, ID1000 injectors, pretty aggressive cam (54-477-11) and a Dorman intake manifold.

    I?m a novice to tuning but not a beginner. I used to tune my Subaru STi a few years back making around 500AWHP. But this is completely different software.

    I?m looking for any advice or possible a start up tune.

    Thanks everyone.

  2. #2
    Tuner in Training
    Join Date
    Feb 2021
    Posts
    25
    This is a gen4 engine by the way.

  3. #3
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    Not knowing what E38 you have makes it tough to give suggestions.

    There is a big difference in the early computers and the later computers as far as what you have to do with them to make them run in speed density and with larger injectors.
    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
    Tuner in Training
    Join Date
    Feb 2021
    Posts
    25
    Ideally it would be a late model ecu because it has the higher hard coded injector limit than the earlier ones correct?

  5. #5
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    Right, I know for sure that 2010+ will have a 127lb/hr injector limit before you need to scale it.
    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.

  6. #6
    Tuner in Training
    Join Date
    Feb 2021
    Posts
    25
    Turns out I have the later year E38 with the higher injector limit. I noticed I don?t have the option for the 2BAR OS. It?s sourced from a 2010 Silverado 4.8l fleet vehicle apparently. Do I need to flash a similar year OS that has the SD OS option?
    Thanks