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| Speedo Calibration https://www.ausmini.com/forums/viewtopic.php?f=2&t=3140 |
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| Author: | sg [ Mon Nov 29, 2004 7:01 pm ] |
| Post subject: | Speedo Calibration |
Speedo is out by roughly 10-15 mph.......... 60klm/hr - 50mph 80klm/hr - 60mph 100klm/hr - 75mph My question is.... is there anything other than sending the speedo to Lionel Otto's to get calibrated......... getting annoyed at all my gauges being out........... it will bite me eventually if i don't recitfy the situation 
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| Author: | 9YaTaH [ Mon Nov 29, 2004 7:30 pm ] |
| Post subject: | Re: Speedo Calibration |
sg wrote: Speedo is out by roughly 10-15 mph..........
60klm/hr - 50mph 80klm/hr - 60mph 100klm/hr - 75mph My question is.... is there anything other than sending the speedo to Lionel Otto's to get calibrated......... getting annoyed at all my gauges being out........... it will bite me eventually if i don't recitfy the situation Mini speedos generally are inaccurate, people get used to that or drive off their Tachos. Go to a "measured mile" and time what the speedo is reading at say 100clicks - then you just drive accordingly. Assuming of course that the speedo is reliably inaccurate!!. |
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| Author: | 68matic [ Mon Nov 29, 2004 7:56 pm ] |
| Post subject: | |
1.6 kilometres to the mile take away 10 to 15 kilometres divided by 1.6 22 degrees celcius off the water temperature take away 12 degrees and divide two celcius to the farenheit 40 minutes to the hour 1st gear only under 5mph the joys of driving a mini |
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| Author: | 9YaTaH [ Mon Nov 29, 2004 8:40 pm ] |
| Post subject: | Ouch!! |
68matic wrote: 1.6 kilometres to the mile
take away 10 to 15 kilometres divided by 1.6 22 degrees celcius off the water temperature take away 12 degrees and divide two celcius to the farenheit 40 minutes to the hour 1st gear only under 5mph the joys of driving a mini Clever that!....OK OK go to one of 5 Km measured stretches around the highways and time how long it takes to go between a few. You are looking at the speed that will give you...... 36 seconds to the Kilometre = 100 Km/Hr.....note where your speedo is reading and drive accordingly....test it by driving at the corrected speed off the speedo and see if you are doing 36 secs/Km right......I'll just go over that again..... 
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| Author: | miniron [ Tue Nov 30, 2004 1:21 pm ] |
| Post subject: | |
If the needle is reading wrong but the odometer/distance part is reading correct then the spring or magnet part of the needle setup needs attention. Not really a DIY job. If you've changed the diff for a lower numerical ratio then you will be going faster than the needle indicated and the distance will be wrong. You may be able to source another speedo from the right vehicle. The basic rule of thumb for Smiths speedos is a cable speed of approx 1000 RPM should give about 60MPH. There is a good article on Smiths speedo workings and how to adjust them on one of the Triumph/MG sites by a bloke called Anthony Rhodes. Do a search for Smiths Instruments or Speedos or Anthony Rhodes as I can't remember the URL. Edit: Found the URL: http://mywebpages.comcast.net/rhodes/speedo.pdf Hope this helps RonR |
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| Author: | dr trim [ Tue Nov 30, 2004 4:59 pm ] |
| Post subject: | |
i put my dash in last night and my speedo now is going absolutely MENTAL before it was fine, hey it may have been inaccurate but in was accurately inaccurate and moved really cleanly. now i get above like 30kph and the thing goes all the way round to 6 o'clock and it just goes mental there, like not where it should be at all. and there's this continous knocking sound. im guessing i've just incorrectly put the speedo cable on or something? or did i break it 
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| Author: | sg [ Tue Nov 30, 2004 5:19 pm ] |
| Post subject: | |
i think that might be it Dr trim.... the pin is not seated right.......... have a look at the link that miniron posted, i think there was a reference to that problem in the article
I think i might get the speedo serviced first and then look at the calibration afterwards.... i followed my fathers month old Navara ST-R to get a gauge of how much the speedo was out, so at least i know the speeds now
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