Quote:
Originally Posted by Old Tele man
equation: MPH = [ 60 / (G×A) ]×[ RPM / rpm ]
where:
MPH = vehicle speed, miles-per-hour
RPM = engine speed, revolutions-per-minute
rpm = tire speed, revolutions-per-mile
60 = conversion constant, minutes-per-hour
G = gear ratio, XX.X:1, etc.
A = axle ratio, YY.Y:1, etc.
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Yeah I've got a good gearing calculator site that takes those factors into account- really handy!
cheers for outlining the calc though-alway good to see what's behind the figures
I cant find a BSFC map for the 318iS m42 engine online, so I'm looking to see wht folks think would be the best setup..