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Thread: How in the heck do i have Knock?? look at my log

  1. #1
    Potential Tuner
    Join Date
    Jun 2008
    Posts
    2

    How in the heck do i have Knock?? look at my log

    Alright. this is on a stock block 4.8 with only a mild cam and c6 manifolds with short dumps and no mufflers (facing forward and down...

    60lbs injectors, edelbrock manfold, ect.... going to be boosted, trying to get it tuned decent on motor first

    Running 2 bar SD... on a Pro Interface

    I have no idea how i am getting so much knock retard.......

    fuel is sufficient, (logging AEM O2 so that can be seen)

    not much timming at all....

    I just don't know, I can feel it hesitating ect. when it starts pulling timming

    My only thought is maybe the exhaust is too loud and is interfering?? is that possible?

    anyway.... a quick 1-3 WOT log.... please let me know your thoughts

    and this is with the system locked into open loop so i can tune via my wideband

    thanks

    zac

  2. #2
    Potential Tuner
    Join Date
    Jun 2008
    Posts
    2
    here is my config if needed

  3. #3
    Tuning Addict WS6FirebirdTA00's Avatar
    Join Date
    Jan 2005
    Location
    Concord, NC
    Posts
    8,093
    your AFR is going to 13.6, way too lean.

    Your IAT sensor is also dead.

    That also seems like very low timing to be running.Once you fix your fueling issues, you may be able to run more.

    Without a tune we can't see your knock sensor settings either.
    Sulski Performance Tuning
    2000 WS6 M6 - LS6 (long block, refreshed top end), 10.8:1 CR, 90 mm ported FAST, Exo-Skel, 227/232 cam, QTP HVMC, EWP, GMMG, 9" w/4.11s
    2018 Sierra SLT 5.3L A8 - Airaid intake tube, GM Borla catback, L86 Intake/Ported TB