davrus
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posted on 5/5/07 at 10:36 AM |
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Electric speedo setting
Hi again
Can any one tell me what figure to put in to my speedo in order for it to read correct.
I have an acewell speedo with 1 pick up sensor mounted in the rear brake drum.
My tyres are 185 70 13
Hope you can help
Cheers
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flak monkey
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posted on 5/5/07 at 10:40 AM |
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Your theoretical circumference is 1851mm, so use that to start with.
After that the only way to check its right is at the sva test, or follow another car at a known speed.
See:
http://www.carbibles.com/tyre_bible.html
Just over half way down there is a calculator for circumference.
David
Sera
http://www.motosera.com
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Fatgadget
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posted on 5/5/07 at 12:21 PM |
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Or calibrate it using the marker posts on any motorway. I believe they are a set distance apart.Can't remember the exact figure.
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Marlon
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posted on 5/5/07 at 03:48 PM |
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I used a tom tom sat-nav to check mine on a very short run, twas perfect at sva.
john.
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