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Thread: stay with open loop or close loop ??

  1. #1
    Potential Tuner
    Join Date
    Sep 2024
    Posts
    3

    stay with open loop or close loop ??

    ram srt-10 2006 RC 8.3L full bolt -- i have wideband gauge


    my truck already tuned ..

    but now i need to know which tune is better stay with open loop all time or close loop ???


    see the attch log ..


    im not sure which one better

  2. #2
    Advanced Tuner abc's Avatar
    Join Date
    Jan 2024
    Posts
    943
    That depends on the combo. of parts and what you intend to do with it. If it's a public road going vehicle, I'm a proponent of CL if at all possible. If it's a mostly closed course ride, then OL is just fine, as long as you are keeping track of the data and making adjustments as needed. As far as the two compare .HPL files go, looks like you didn't clear the LTFT's in the open loop test, that is not a true representation of what it will do in open loop. Based on what I'm seeing, it looks better in closed loop, but I'm not seeing much.