Re: [AMC-list] Gear Ratios

[eddie allison <hot_rod_eddie@xxxxxxxxx>]

Armand
 
(0.00595) * (RPM * r) / (R1 * R2) = vehicle speed in miles/hour
    where: 
           RPM = engine speed, in revolutions/minute
           r = loaded tire radius (wheel center to pavement), in inches
           R1 = transmission gear ratio
           R2 = rear axle ratio
 
You can also google speed vs rpm calculator




I have a 2.73 ratio in the rear axle, the rear tires are 245/45R-16.
The tire is 24.7 inches in diameter
The T5 has a 3.35 first gear.
Fifth overdrive is .63

Can anyone expand on this?

What speed will the car be going in first gear at 2000 rpm.

What speed will the car be going in fifth gear at 2000 rpm.

I know there's a formula for this bt of course my used up brain cells cannot 
figure it out.


thanks,

Armand 



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