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Thread: LT1 OS with rpm axis

  1. #1
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    LT1 OS with rpm axis

    Does anyone know of or have a stock operating system for a manual LT1 OS that used rpm as its axis for the driver demand tables? It seems that only the LT4's used that kind of operating system, which requires re-pinning a whole lot of temperature readings and killing a lot of options in the background of the calibrations. Most of the background stuff can be taken care of, but just wondering before all of this starts taking place if anyone happened to have one.
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
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  2. #2
    Advanced Tuner
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    looked at all my LT1 Files, they all using vehicle speed as x axis.

  3. #3
    Only one I have like that is the GMPP LT1...here it is if can help
    Attached Files Attached Files

  4. #4
    Senior Tuner DSteck's Avatar
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    You can pretty freely switch between using 20218. There doesn't seem to be anything complex that uses that status bit... it just affects how the axis label value for the driver demand table is calculated (vehicle speed or engine rpm). If that value is false, the axis label is populated as vehicle speed. If that value is true, the axis label is populated as final engine speed divided by a speed value with respect to current gear.

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  5. #5
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    Quote Originally Posted by DSteck View Post
    You can pretty freely switch between using 20218. There doesn't seem to be anything complex that uses that status bit... it just affects how the axis label value for the driver demand table is calculated (vehicle speed or engine rpm). If that value is false, the axis label is populated as vehicle speed. If that value is true, the axis label is populated as final engine speed divided by a speed value with respect to current gear.
    Pretty much what Will told me too after he mapped it out I've set it up to use rpm and will make sure this works tonight. Thanks Everyone!!!

    Only problem I may have is it doesn't have any way to know the current gear. No VSS input at all. Hopefully doesn't cause any problems.
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
    Mobile Tuning Available for North Georgia and WNC