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Thread: VVT Vane position

  1. #1
    Lifetime Member killerbee's Avatar
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    Jan 2006
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    Default VVT Vane position

    0% vs 100%

    which is which?

    1. when the vanes flatten to form a circle this is:

    a. 0% ?
    b. 100% ?

    2. The maximum boost is found near:

    a. 0%
    b. 20%
    c. 80%
    d. 100%
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

  2. #2
    Member
    Join Date
    Dec 2005
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    96

    Default

    The percentage is relative to velocity. The higher the percentage, the faster the velocity for spool-up to a point. 100% is almost blocking flow completely. This is where GM is commanding LLY/LBZ turbo's for exhaust brake feature on 06 medium duty trucks. 0% is almost no boost at all, or fully open. Hope this helps out some.
    04.5 2500HD LLY EC/LB
    14 Sonic RS Sedan
    GM Certified Technician
    President of the 'I killed an ECM' club

  3. #3
    Lifetime Member killerbee's Avatar
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    Default

    Awesome, thanks! Makes more sense now.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

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