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Thread: 99 chevy 5.7L Vortec

  1. #1
    New Member
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    Jun 2011
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    Default 99 chevy 5.7L Vortec

    So i just purchassed this truck and I am 1 day old on a V2. I pulled what was off of the pcm and I am trying to find out if its the stock tune..Ajny help would be great...


    stoc.tun

  2. #2

    Default

    its a stock part from the changes in the trans for the diff change (3.42 to 3.72)
    330 rwkw EFILIVE OS 01290005 SD Cam / Head Tuned 6 speed VY SS Commodore
    10/71 Blown 572 Big Block Chev HQ 2 Door Monaro

    GM Performance Centre
    Busselton WA
    AUSTRALIA
    Phone: 0447 003050

  3. #3
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    Default

    Hmmm I don't understand what you just said

  4. #4
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    Default

    Hello ksipes,

    Your tune is a 1999 Black Box Vortec tune using OS 09365085 - with a 5.7 L Vortec and 4L60E transmission. The Tune Tool has a compare function (must be the same OS). Load your current tune then select the `Load Alternate calibration`function from the icons at the top of the screen.

    The Tune File Depot website has a 1999 Chev Suburban available for download - it uses the same OS, engine , and transmission as your tune - use this tune as your alternate calibration. Some differences will probably be related to the gear and tires used - but the remainder of the tunes should be quite similar.


    Regards,
    Taz

  5. #5

    Default

    Quote Originally Posted by ksipes View Post
    Hmmm I don't understand what you just said
    What i mean is when i compared it to a stock factory tune i see that the diff ratio has been changed and the transmission calcs have been changed to suit the new diff ratio.
    here is a stock factory tune.
    as taz post load your current tune and load in the stock tune to see the changes in the two tunes
    330 rwkw EFILIVE OS 01290005 SD Cam / Head Tuned 6 speed VY SS Commodore
    10/71 Blown 572 Big Block Chev HQ 2 Door Monaro

    GM Performance Centre
    Busselton WA
    AUSTRALIA
    Phone: 0447 003050

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