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Thread: LY7 with E55 ECM 2 Bar tune

  1. #1
    Potential Tuner
    Join Date
    May 2021

    LY7 with E55 ECM 2 Bar tune

    Hi and thank you in advance.
    I have a Holden with a LY7 and E55 ECM that has had a turbo fitted and calibrated at 10 PSI boost.
    The vehicle idles and drives to about 3 PSI boost and then refuses to run well.
    I am what I would call intermediate with HP Tuners and very skilled around vehicles.
    I am told that I need to replace the ECM with something that can be be tuned to 2 Bar.
    My questions are below.
    Do I need to change the ECM to tune ?
    Map sensor change ?
    Best to do speed density tune ?

  2. #2
    Advanced Tuner
    Join Date
    Aug 2016
    Trying not to sound offensive, but, good luck. Bosch ECU support in the software is limited, and that vehicle didn't really have any other ECU options at that time...