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Thread: Varable Valve timing for L92 6.2L

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  1. #1
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    Default Varable Valve timing for L92 6.2L

    Are these tables going to be implemented for the 6.2L Cad. Escolade?

  2. #2
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    I would also like to know about VVT tuning for the 6.2L.
    2014 Silverado 4X4 6.2L
    2010 Camaro 2SS-RS L99
    2007 Sierra Denali 6.2L
    2005 1500HD 4X4 Quadrasteer 6.0L, COS3 SD

  3. #3
    Lifetime Member GMPX's Avatar
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    We can add these in for sure, but depending on how complex it all works we might not get around to it for the next release which will be the E67 .cals this week sometime.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  4. #4
    Lifetime Member minytrker's Avatar
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    What about being able to just turn off VVT? I want to put a 6.2 in a trailblazer and just turn off the VVT.

  5. #5
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    Why turn off VVT? It makes waay more power with VVT, look at the 4.2L I6 LL8 with VVT. It makes almost as much hp as the 5.3L V8s do (yes less TQ, but its an inline engine too).
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

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    What parameters does the VVT use to determine the camshaft position? I'm just wondering how it would be on a Forced Induction setup. Seems like advancing the cam down low with a fast spooling FI setup might not be good, the cam retard in the upper rpms might work out decent though.

    If there is a load parameter it's based on in there somewhere that might be alright though.

  7. #7
    Lifetime Member GMPX's Avatar
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    I've added some VVT tables in to our next round of Beta calibrations.
    So they will be appearing in the near future for you guys too.
    I agree with ScarabEpic22, leave the feature on, seems like a good thing to me.

    The desired position is based on Air Flow (load) and RPM.

    Cheers,
    Ross
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  8. #8
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    Looks like that will work out nicely with a FI setup.

    That attachment makes me curious now though. I see a table in there for "Cam position in AFM mode". I didn't realize there were any vehicles yet with both features or is that a glimpse into our future.

    Thanks Ross.

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    Quote Originally Posted by XLR8NSS
    Looks like that will work out nicely with a FI setup.

    That attachment makes me curious now though. I see a table in there for "Cam position in AFM mode". I didn't realize there were any vehicles yet with both features or is that a glimpse into our future.
    6.0L in the new trucks comes with both AFM and VVT.

    Is this a screen shot from a 6.0L or 6.2L and if so, within the VVT adjustment range of 0 to 30 degrees, what number would represent a regular cam installed straight up, "0 degrees advanced"?

    Ron
    2014 Silverado 4X4 6.2L
    2010 Camaro 2SS-RS L99
    2007 Sierra Denali 6.2L
    2005 1500HD 4X4 Quadrasteer 6.0L, COS3 SD

  10. #10
    Lifetime Member GMPX's Avatar
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    Quote Originally Posted by RonC
    6.0L in the new trucks comes with both AFM and VVT.

    Is this a screen shot from a 6.0L or 6.2L and if so, within the VVT adjustment range of 0 to 30 degrees, what number would represent a regular cam installed straight up, "0 degrees advanced"?

    Ron
    It's from a 6.2L Escalde.
    The degrees would represent angle from the mechanical rest position, so if the cam was installed advanced then the table values would represent the timing from that advanced position. I have not found (if there is any) a parameter specifying electronically a reference angle the cam is installed at.

    The thing to remember about these ECM's is they are used on a wide range of engines now, so even though some engines don't have certain 'mechanical' functions it will still be shown in the tuning tool.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

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