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gear ratio science 200 1987

posted by  Andy's banna brick on  Tue Mar 6 09:30 CST 2007
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last visit: Tue Jul 21 13:54 CST 2009
[RELATED]

I was driving down the highway and i started to wonder if my speedo is accurate. So im thinking that at certain rpms on level surface, going at a constant speed, there should be certain mph. In other words velocity is a function of engine rpm.
Is this possible to compute?
How would you relate the rpm to the speed? I think youd have to relate the rpms to the gear ratio and then to the final drive then use the circumferance of the wheels.
ive got a 1987 245 with a 5 speed manual, no over drive.





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