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Speedo Accuracy

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vern74 Fahrvergnugen

901 posts · joined Jan 2004 ·

#219365
G'day everyone
With my ride being 30 years old I am not expecting him to be perfect so was not surprised when going through one of those 5km speedo check thingos and found that he had not registered anywhere near the 5 ks
Where can I go to get it checked.....or is it just not worth the bother ?

Midlife crisis Nartispuddlejumper, Bureau of Toxicity

2,282 posts · joined May 2003 ·

#219367
look in the ellow pages for instrument repairs and they will be able to help you.
The RACQ can check it for they usually have rollers at the main depot in Brisbane they charge $20.00 to do it.

Marc
If you can't laugh at yourself you can't laugh at anyone else! Because life is to short not to LAUGH

Bizarre Moderator The artist formerly known as blue74l

12,785 posts · joined Aug 2002 ·

#219373
i wouldnt bother

mine use to click over 4kms in the 5km test and would show 100km/hr when cruising next to my wife @ 100km/hr in a Ford that showed 100 km/hr.

Just make sure the bearing/dust cap where the cable joins isnt rounded out.
Try and test against an known good car - or just general traffic.

As long as you know the multipling factor it shoudnt be a worry
Futue te ipsum!!!

blutopless2 DAMSLO

2,457 posts · joined Jan 2004 ·

#219387
i would not bother to go and get it checked or even attempted to be fixed.... during manufacture the allowable tolerance is +/-10km/h. if you take it to be checked they will check it against this allowable error... if you ask them to fix it they will either tell you honestly not to worry about it or they will rip you off and still return a speedo with an accuracy of +/- 10km/h. you can have them install a gearbox into the speedo cable system that will correct the error but it will cost you $$$$ and it will still not be accurate over its entire range... ie at 50km/h it may read 45km/h but at 100km/h it will read exactly 100km/h.
they are unfortunately only meant as an indication of your actual speed, not a precise measurement because too many things can influence the readings.
see.... air and water do mix 😉

1974 1300
1997 MK3 Golf GL
2003 NB Cabrio
2012 Golf VI GTI
2014 Audi A4 Quattro

1303Steve Scirocco Rare

8,650 posts · joined Aug 2002 ·

#219708
hi

If you dont mind having a non original speedo, buy a new electronic VDO speedo, they are user setable and are pretty accurate.

1302Steve