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#1
9th May 2015, 10:45 PM
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type 9 cable rotation
Hi all bizarre question but does anyone know how many times the Speedo cable rotates per revolution of the wheels on a Ford type 9 box can't test it myself as I haven't got a cable on my box
Cheers
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#2
10th May 2015, 09:59 AM
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depends on speedo drive gear as there are a few different applications.
TT
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#3
15th May 2015, 01:29 AM
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In general most speedos are calibrated for 1000 revolutions per mile. The Sierra tyre size is 185/60R14, which gives 887 revs per mile, which means 1.127 revs of the cable per wheel rev.
When I switched from mechanical speedo to digital, I used a Hall speedo sensor that sends 8 pulses per revolution in place of a cable. I calibrated the speedo for 5000 pulses per km (=8046 pulses per mile) and it is dead on.
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