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Gears vs Speed

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by Greggles_VS, Aug 30, 2012.

  1. Greggles_VS

    Greggles_VS The Noob

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    I know im half flooding the forum about my trans lol but just finished a trans service for the first time ever (very proud) what speed do you get out of your gears and is that with a stock car? Im now getting just over 70 out of first, and 130 out of second. Didnt know if this was good?
     
  2. Jonah 101

    Jonah 101 Undefined

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    Even if its an auto you should be AT LEAST in 3rd by the time your doing 130Kmph.

    Ps. hope you dont get flamed for doing 130 lol
     
  3. Greggles_VS

    Greggles_VS The Noob

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    Lol nah quiet back street just as it hit 130 it clicked into third
     
  4. aaronevolution

    aaronevolution Donating Member

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    My old VR was about 70 into second and 120 into third, my old VY was about 75 into second and 130 into third.
     
  5. SID888

    SID888 New Member

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  6. aussie4life11

    aussie4life11 Keep It Simple Stupid

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  7. Greggles_VS

    Greggles_VS The Noob

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  8. aussie4life11

    aussie4life11 Keep It Simple Stupid

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    possibly. i got the trans from my wrecker car out the back when my trans blew up
     
  9. Jxfwsf

    Jxfwsf Well-Known Member

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    gear change control is all upto the ecu/pcm (memcal tune), basically nothing in the trans will control when it changes gear (unless you start drilling holes, redirecting fluid flow and basically manualise it)
     
  10. tavrin

    tavrin New Member

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    Heres the table the ECU uses to determine what speed to shift gears at (Throttle % on the left hand side)

    Shift.jpg

    I forgot to mention: the table is from a stock memcal showing the shift points for both "Power Mode" & "Normal Mode" (Stock 3.08 diff gears too).
    Of course, if you do alter the drivetrain (Diff gears for example) your shift points will change as well.
     
    Last edited: Aug 30, 2012
  11. Jxfwsf

    Jxfwsf Well-Known Member

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    in addition to the table above most vn/vp/vr/vs speedo's are generous (grab a gps device and compare rt speed to what the cluster shows) i've found this with most that roughly: (if you run different rims and tires to stock with a larger rolling diameter this will change the below values)
    63 = 60
    107 = 100
    118 = 110

    so 130 by your speedo would be close to the pcm's programing and is really around 120, i take no responsibility if i've given inaccurate info to your car's calibration and it's upto you to have your speedometer tested professionally for accuracy (i know both cars i drive at the higher speedo reading are about that and pass 1 - 3 speed camera's daily sitting on the higher speedo reading and don't get pinged).
     
  12. Hangman

    Hangman Aspiring Sociopath

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    Yeah my VS is like that too. I can go through the 80k speed camera on the way to work with the needle inbetween 80 and 85 and not get done.
     
  13. aussie4life11

    aussie4life11 Keep It Simple Stupid

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    its a tollerence that the manufacturer puts in there. i have my speedo set to exact rt speed(altered it myself with my gps). basically they make the needle read faster than your actually doing to give you a bit of leeway because not every speedo unit is built exactly the same.
     
  14. Greggles_VS

    Greggles_VS The Noob

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    Mine should be accurate, when i swapped odo cog my speedo didnt line up correctly, so it now idles or is turned off "doing 10kmph" but whilst driving speedo is accurate to my gps.
     
  15. Jxfwsf

    Jxfwsf Well-Known Member

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    it's actually the design standards, they can be withing 10% tolerance or some bs yet you get a speeding fine for doing 3 km's over the limit... kia's and hyundais are worse 60 on most of those buckets of crap is really 54-55 kmh....

    as for the speedo being accurate because you put it back together with 0 being 10 kmh... lol, the speedometer scales in a linear fashion, as the speeds i posted above you can see a pattern in the speed and how much it will be out, at what speed is yours now "accurate"? cause i bet above and below that it will not be (0 is not 10 last time i checked).

    being a vr/vs the easiest way to get it more accurate (without pulling the cluster apart) is to modify the ppk value in the memcal, have played around with this but found the l3 cluster speed display is close to accurate stock standard where the speedometer is above, getting the speedometer correct increased the l3 displayed speed above the correct speed in turn messing up the odometer by a very small amount (now i could've messed with the cal numbers in the cluster to get the distance traveled correct but this still left the odometer ticking over more km's than actually done as the value that calculates that can't be calibrated easily).
     
    Last edited: Aug 31, 2012
  16. Hangman

    Hangman Aspiring Sociopath

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    Correct, the faster you go, the further it's out.
     
  17. tavrin

    tavrin New Member

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    The ppk in the memcal may not work on some VS's. I tried this on mine a while back (L2 Dash) and only the speed seen by the ECU is altered (Dash remained the same). It was something to do with the VSS signal being split and fed to both the ECU & dash directly. For the PPK to correct your dash you would need to have VSS -> ECU -> Dash.
     
  18. SJM38S

    SJM38S New Member

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    For interest sake:
    Earlier cars are +-10% displayed speed to vehicle speed.
    Newer cars are +0 to -10% -4km/h max
    (meaning displayed speed of 100 can be as little as actual speed of 86!)
     
  19. Jxfwsf

    Jxfwsf Well-Known Member

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    my bad was assuming an auto, but yes you're correct in a manual situation. (auto trans is vss to ecu/pcm and the cluster is driven by the ecu/pcm)

    thanks for the updated info, still a bs rule no matter how you look at it.... i hate being stuck behind people in their nice new cars plodding along so far below the posted limit when there's no opportunity to overtake (people that can't regulate and maintain their speed or blind you with their h/beams when you do overtake p me off more though).
     

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