Slot Car Math



1 mile = 5280 feet
1 hour = 3600 sec
track = 155ft 
lap time = 6sec
How fast am I going in MPH?
155 / 6 * .6818 = 17.613 actual mph
17.613 * 24 = 422.7 scale mph
or
155 / 6 * .6818 * 24 = 422.7 (that's fast)
Gear Ratio
pinion = 9 teeth (small gear on the motor)
Spur = 30 teeth (large gear on the rear axial)
30 / 9 = 3.333 gear ratio