TwinTurbo.NET: Nissan 300ZX forum - MPH = tire diameter x RPM divided by gear ratio
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Subject MPH = tire diameter x RPM divided by gear ratio
     
Posted by SirpriZ on July 30, 2005 at 6:52 PM
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In Reply To Top Speed posted by Zenica on July 30, 2005 at 05:01 PM
     
Message (gear ratio = final drive ratio x gear ratio of trans gear. Fifth in manual is .75, fourth in auto is .69) x 336. If you want to find RPM at a given MPH: RPM = gear ratio x MPH x 336 divided by tire diameter. Mark

     
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