Hi
I'm trying to figure out the speedometer drive gearing inside the
different gearboxes. I'm helping a friend with his speedometer. He has a
100-6 which was delivered without overdrive. My own car is a 3000 mk2
with overdrive. The rear axle gear ratio on these cars are the same, as
far as I understand, according to Clausagers book. But the speedometers
are different. The 3000 speedometer needs 980 revolutions per minute to
show 60 (MPH) and advance the odometer 1 mile in one minute. The 100-6
speedometer needs 1575 revolutions per minute to do the same thing. Note
that both cars are imported from the states, so both are speedos are in
miles.
Does anyone know what the difference is? Well, I can calculate it of
course, but I thought asking on the list would be safe in case I have
got something wrong.
Best regards, Per from Sweden.
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