Math and Equations

Yes, kids, algebra is good for something. Here are some real-world examples.

RPM = V / D x GR x 334.2

Where:

V = vehicle speed in mph

D = effective tire diameter

GR = gear ratio (e.g., for my truck, 4.10 rear x .70 overdrive = 2.87)

Related Sites:
http://www.mortec.com/engmath.htm