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Thread: 05 colbalt bypass valve

  1. #1
    Lifetime Member tokymon's Avatar
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    Apr 2008

    Default 05 colbalt bypass valve

    im tuning an 05 colbalt with upgraded pulley it will hit 15 # at about 4800 rpm then drop to 7 # i can watch the bypass valve come open as we were on the dyno
    is there a way to adjust when it comes open i didnt see anything in the software i updated to the latest software attaching copy of stock tune and a log

    thanks kyle
    Attached Files Attached Files
    97 2500 ecsb 5.7l/4l80e/4x4 411 pcm /thorley tri-y's/dual super 40's with x (catless)/aem cai/msd 6a and coil/zz4 cam/beehive spring/lm-1

    stock sucks

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