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still fighting diablo tune

This is a discussion on still fighting diablo tune within the Computer & Tuning forums, part of the LSx Technical Help Section category; has anyone used the "new" slp diablo programmer? still can't get my tune down with just simple bolt-on stuff.throttle response ...

  1. #1
    Junior Member m.j.lecki's Avatar
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    red
    2002 ws6 trans am

    Cool still fighting diablo tune

    has anyone used the "new" slp diablo programmer?
    still can't get my tune down with just simple bolt-on stuff.throttle response
    not good.at shift points the car "burbles"have tried to retard timing has helped some.also richin up mixture but no real results to the good.talked to
    slp ..depends on who you talk too...
    02 ws6 hooker lt's ory maf/slp and stock 180therm 4l60e trans..air lid...anyone know of a baseline to start on modif the tune with the diablo?
    std tune mkes the car fall flat under 2200 r's

  2. #2
    Senior Member
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    I got a custom tune from RWTD, but car worked fine initially with the predator tune. You running the stock MAF? Maybe their tune assumes that? Don't know if this will help but here's a link that might help and a TTT for you. www.ls1tech.com/forums/showpost.php?p=2652650

  3. #3
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    onyx black
    1999 formula firebird

    i would go to a local reputable dyno shop and just get it over with...

  4. #4
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    I would swap out that maf for your stock one and start over. What are your Ltrims, what's your wot timing, and where are your shift points?

  5. #5
    Junior Member m.j.lecki's Avatar
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    red
    2002 ws6 trans am

    thanks for the input quick info for you..i don't have detailed specs
    i have seen wot time as high as 34 deg tried backin it down to a point better
    but lost a lot of throttle response lft's have ranged from -3.87 to +7.38???
    all seems well out of wack these come from the diablo reradings

  6. #6
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    Silver/Black
    2002 Camaro SS Cnvt

    You just don't have the fine-grained control
    over spark and fuel that you want, once you
    depart from GM's stock hardware and tune.
    The RWTD tunes should be better but every
    time you change airflow you have to go back
    to it. When I was using the Predator I would
    see PE changes and fuel changes push on
    closed loop trims etc., indicating there is a
    sort of "blanket" modification of the maps but
    you do not necessarily want this.

    Also the Predator does nothing much with
    part throttle shiftpoints nor the stupidity in
    the PT/WOT transition (like no kickdown above
    10MPH, except WOT) so you will not be able to
    make it stay properly in-powerband at anything
    except WOT, unless you request it done.

    If you're seeing positive fuel trims that's not coming
    from the user params, it's more likely from header
    exhaust gas cooling, giving you bent fuel trims and
    this may also have to do with your low RPM
    "flatness" as the stock fuel trim cell map lumps
    everything below 2500 RPM into one cell per MAP
    range, your sleepy idle O2 response messes up
    low cruise as well, etc.

    This general lack of detail access is why my
    Predator has mold on it. There's a lot of details
    that matter, and you can't even see or tell the
    man what you want changed; he has to guess,
    and later on you both will have to guess again.

    And good luck with the "technical" people at SLP.

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