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Thread: Shift point calculator, and tire size

  1. #1
    Lifetime Member killerbee's Avatar
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    Default Shift point calculator, and tire size

    WHY does the shift point correction routine associate with tire size?? That makes no sense to me, as you would not want shift points changed just because tire size was changed. You would instead make changes to the speedo params (h0102 and on) so that shift point DON'T change.

    Am I off in my rationalle?
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
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  2. #2
    EFILive Developer Site Admin Blacky's Avatar
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    That's exactly what the shift point correction does (at least that's what it is supposed to do). It asks you to enter your old tire/diff values, and the new tire/diff values, then when you click apply it alters the speedo settings so that your shift points remain the same.
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    Paul
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  3. #3
    Lifetime Member killerbee's Avatar
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    After thinking about it, I guess the idea is to maintain the same rpm at the shift point, so it does make sense from that angle.

    I am a little slow, thanks Paul.
    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"

  4. #4
    Joe (Moderator) joecar's Avatar
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    No, I was wondering myself and I drew a blank... that's what friends are for, a sanity check

  5. #5
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    Quote Originally Posted by killerbee View Post
    After thinking about it, I guess the idea is to maintain the same rpm at the shift point, so it does make sense from that angle.

    I am a little slow, thanks Paul.
    '07 TBSS, LS2, T42, 3SS, Black on Black on Black, Pretty much stock at the moment. EFILive will fix that

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