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Thread: Tuning '03 suburban with procharger, 1 bar

  1. #1
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    Default Tuning '03 suburban with procharger, 1 bar

    just a few questions.

    1. truck has stock injectors, should I get lucas 42lb'ers or run stock and check duty cycle and afr
    procharger kit is 7-9 lbs
    truck has a rising rate FPR, has no KR, but is running lean
    have not checked with wideband but narrowbands are only getting to 850
    I have an LC-1 and will begin tuning next week

    2. Is this the correct path for tuning?

    a. injector flow rate(if not using stock injectors)
    b. idle tune (if running cam with unstable idle)
    c. autotune VE table
    d. power enrichment tuning
    e. MAF calibration (if still running maf)

    3. when does the vehicle enter PE mode?
    I looked at the parameters under mixture but it doesnt tell me when PE is operating.

    4. should I upgrade to 2 bar map sensor and custom OS to run 7-9 lbs?
    would this be easier to tune with?

    5. after I reset LTFT's, how much driving is required to see the results?
    are reccomended LTFT's different for a boosted vehicle?

    TIA for any help

  2. #2
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    Default engine size

    hi what size engine are you running 8.1 6.0 ?

  3. #3
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    Quote Originally Posted by 69camaro5speed
    hi what size engine are you running 8.1 6.0 ?
    whoops, 6.0 4l80 4x4

  4. #4
    Senior Member Tydriver's Avatar
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    Default

    Not much to add in terms of tuning help.. But COOL project.. Glad I am not the one paying the FUEL BILL on that monster..

    Todd

    1993 BMW 325is <- For Sale
    2003 Silverado LS 4x4 <--- you want to autocross what?
    2005 Avalanche 5.3L LS(EFI Live tuned) <-- my gas hog running on e85 3+ years now
    2012 Subaru Outback (wife's daily)

  5. #5
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    ok, I have been told to run 60# mototrn injectors

    can anyone tell me when a car enters PE mode
    does it depend on throttle position, map, or what?
    thanks

  6. #6
    Senior Member Tydriver's Avatar
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    Quote Originally Posted by Chunx
    ok, I have been told to run 60# mototrn injectors

    can anyone tell me when a car enters PE mode
    does it depend on throttle position, map, or what?
    thanks
    Well what do you know I do now have something technical to add here..

    FWIW, keep in mind, if you DO run the Mototron (Sp ?) 60# injectors that the Truck Injects are different on the electrical connections than the car(s) ones. Meaning this isnt a direct plug and play operation.. I think speartech sells a conversion part but the trucks run a slightly different electrical connector from what I have seen/read..

    Todd

    1993 BMW 325is <- For Sale
    2003 Silverado LS 4x4 <--- you want to autocross what?
    2005 Avalanche 5.3L LS(EFI Live tuned) <-- my gas hog running on e85 3+ years now
    2012 Subaru Outback (wife's daily)

  7. #7
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    Quote Originally Posted by Tydriver
    FWIW, keep in mind, if you DO run the Mototron (Sp ?) 60# injectors that the Truck Injects are different on the electrical connections than the car(s) ones.
    racetronix.com sells 60# mototron deka 4 shorty(truck) injectors
    thanks for the heads up, that would have cost me some time.

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