Posted by wm (IP: 198.150.52.21) on October 21, 2000 at 23:05:41:
A while back several people were asking about rpm and speed calculations. I ran across this old equation today and I thought I would post it. If anyone out there knows their mph and or rpm through the traps try this equation and see if it works.
Tire diameter x 3.1416 x 1000 x 60 / 12 / 5280 / gear ratio x rpm / 1000=mph at the end of the quarter mile.
/ =(divided by)