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Thread: How accurate is your speedo??"

  1. 29th August 2006, 06:17 PM #1
    sumo
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    How accurate is your speedo??"

    Checked the defenders speedo today up on the freeway, against the missus suby, its 7km hr fast!!, So the landy is sweet as a nut crusing at 93kms hr, chit eh!!. "Ah well still get there some time".


    Sumo.
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  2. 29th August 2006, 06:22 PM #2
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    one_iota
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    Same with my Disco above 60 kph (as measured by the GPS)...the Commodore is spot on.

    Surprisingly inspite of the speedo reading the odometer is accurate .
    Mahn England

    DEFENDER 110 D300 SE '23 (the S M E G)

    Ex DEFENDER 110 wagon '08 (the Kelvinator)
    http://www.aulro.com/afvb/members-rides/105691-one_iotas-110-inch-kelvinator.html

    Ex 300Tdi Disco:


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  3. 29th August 2006, 06:34 PM #3
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    DEFENDERZOOK
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    what size tyres are you running.....?

    apparently the defenders should be running 255 85 R16 to read correctly.....
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  4. 29th August 2006, 06:45 PM #4
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    JDNSW
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    Quote Originally Posted by sumo
    Checked the defenders speedo today up on the freeway, against the missus suby, its 7km hr fast!!, So the landy is sweet as a nut crusing at 93kms hr, chit eh!!. "Ah well still get there some time".


    Sumo.
    That's interesting - my County is 7-8% fast, checked at a variety of speeds and using a variety of methods - on standard 7.50x16 tyres. Difference due to tyre wear is pretty small, maybe 1% or a little more. It has not varied over the last fourteen years, and the odometer is out by the same amount.

    The legal requirement is, from memory, +10%, -0%, so they seem to have gone for safetyabout in the middle of this range.
    John
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  5. 29th August 2006, 07:42 PM #5
    tombraider Guest
    Lara is (at 100 indicated) doing a respectable 116km/h.

    But then, tyre size is a factor!!!!

    Have a Truspeed or 3 sitting here that will fix the issue.

    Tombraider
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  6. 29th August 2006, 07:45 PM #6
    sumo
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    Quote Originally Posted by DEFENDERZOOK
    what size tyres are you running.....?

    apparently the defenders should be running 255 85 R16 to read correctly.....
    Standard tyres, 750x 16 dunlop road grippers, ( telecom tyres) the best ones out there!!. Ha ha ha.
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  7. 29th August 2006, 07:49 PM #7
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    DEFENDERZOOK
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    Quote Originally Posted by sumo
    Standard tyres, 750x 16 dunlop road grippers, ( telecom tyres) the best ones out there!!. Ha ha ha.

    telecom tyres.....no wonder its slow......
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  8. 29th August 2006, 08:20 PM #8
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    Timmo
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    103 on the speedo gives me 100kph on the gps, with 265, 75 R16s, error is less than it was with the original grabbers.
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  9. 29th August 2006, 09:33 PM #9
    sumo
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    Quote Originally Posted by DEFENDERZOOK
    telecom tyres.....no wonder its slow......
    Just keeping every thing standard, things don't fall to bits as quck!, Just for interest sake whats the next size up from telecom on standard rims?.
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  10. 30th August 2006, 07:27 AM #10
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    MickG
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    Can vouch for the truespeed unit....very accurate once I fitted 32" to my D2....I was about 10% out over standard.
    '99 Manual TD5 D2.......heap of money spent on it and it has ended
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