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Thread: help needed tuning 04.5+ ecu using 03-04 pistons & injectors

  1. #1
    Potential Tuner
    Join Date
    Nov 2021
    Posts
    1

    help needed tuning 04.5+ ecu using 03-04 pistons & injectors

    Hello i?m hoping to get some direction on tuning an 04.5 ecu with the earlier 03-04 piston bowl design and matching injectors. From what i understand the 6.7s went back to a similar bowl design and spray pattern but there is a lot different between the 2 when trying to compare tunes.
    I have noticed that my truck is especially noisy at idle even compared to a stock 03 305hp truck.
    Not really looking for any huge power gains but i know the 325hp tuning is not optimized for the early pistons and injectors.
    I?m very familiar with HP Tuners and gas tuning but have never tried anything on a diesel.Any starting pointers would be appreciated.

  2. #2
    Advanced Tuner projectlnf's Avatar
    Join Date
    Jun 2012
    Location
    warrenton va
    Posts
    392
    If it?s noisy at idle just reduce injection timing.

    Seems like the bowls are narrower on the 03-04?

    I would think that advanced timing would make it spray outside of the bowl more than the 04.5 would.

    If I researched it right.