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Thread: 98 trans am help

  1. #1
    Tuner in Training
    Join Date
    Apr 2013
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    37

    98 trans am help

    changed my setup from ls2 long block- 231/237 cam 42# injectors fast 92/92

    new setup ls2 short block- ported ls3 heads- gt11 cam 215/231 ls3 injectors - stock ls3 intake 90mm tb

    car starts right up but scan looks lean
    here is my tune/scan
    Attached Files Attached Files

  2. #2
    Tuner in Training
    Join Date
    Apr 2013
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    37
    made some changes but now looks rich and SFT -14.0
    any help would be great. cant find ls3 injector data

  3. #3
    Potential Tuner
    Join Date
    Jan 2014
    Posts
    9
    42lb./hr @ 58psi
    35lb./hr @ 43.5psi

    as far as injector data, just grab the tables from a vette or ss camaro.

  4. #4
    Tuner in Training
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    Apr 2013
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    37
    Thanks omega I got it ...

  5. #5
    Advanced Tuner JamesLinder's Avatar
    Join Date
    Jan 2011
    Location
    Bella Vista, AR
    Posts
    363
    Injector flow rate data looks wrong (half the curve is flat), and did you calibrate the MAF yet?

    Of all things that you must get exactly right, the top two are the injector flow rates at various
    intake manifold pressures, and the MAF must be dialed in using a WB O2 sensor. Even the VE
    correction factors are updated by the MAF readings when steady state conditions of the dynamic
    air section are met.

    Have you done any actual logging and tuning with a wide band yet?

    The lower RPM section of your VE table at lower MAP values is messed up really bad.

    Start with the stock OEM tune file for your motor, or closest thing GM has to your motor. What
    MAF are you using?
    Last edited by JamesLinder; 08-27-2014 at 08:04 PM.