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  1. #1
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    Member No: 181466 ZooMer is an unknown quantity at this point ZooMer's Avatar
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    Yes | No

    Speed limiter on 2001 M-Roadster??

    Looking for confirmation on some stuff I read....

    1) There is a speed limiter on Z3M's at 155mph.
    2) The speedometers are off by 7ish percent.

    Was on a loooooong, straight and empty stretch of road tonight and decided to crank it up. First off the convertible top sure whistles very loud at speed and just gets louder and louder the faster you go. The little beast just kept pulling and pulling all the way. I was expecting to get to 155 and have the electronics kick in but it just kept on pulling. Was at 162 on the speedo when I decided enough was enough and took my foot off the gas peddle. As it slowed down below 100 felt like I was going uber slow.
    2001 ///M Roadster #16
    Laguna Seca Blue - no mods


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    Member No: 12416 ZeattleDave2002 is an unknown quantity at this point ZeattleDave2002's Avatar
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    Yes | No

    Could be chipped with limiter removed

    Do some research and get back to us!




    Boston Green M Roadster

  3. #3
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    Member No: 10017 biklen is an unknown quantity at this point biklen's Avatar
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    According to a BMW TIS in 2000, speedo error is

    The maximum permitted speedometer advance is 10% of the actual input speed plus 2.4 mph.
    Using max error, your displayed spped of 162 could have been an actual speed of a little over 145. My 99 2.3 is off by almost the max allowed by BMW. GPS shows actual.

    Do not know about the speed or rev limiter.
    Tom BTom B

  4. #4
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    Member No: 129783 kostverloren is an unknown quantity at this point kostverloren's Avatar
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    Re: Could be chipped with limiter removed

    I believe that if you gey the DINAN remapping the limiter is removed.Kostverloren

  5. #5
    SteveJ
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    Yes | No

    The car knows the true speed

    Just set the cruise control at a particular speed and reset the average speed on the computer. The actual speed will come right up. I'm not suggesting you do this at 100+ mph, but it's an interesting bit of trivia.


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