OK, I'm a hot rodder and can't do math very well with out a book of forula. I had it written down and lost it.
I need to find RPM for a given tire size, MPH and constant.
I found a formula that answers Final drive ratio, but am not math blessed enough flip it around to get what I want. Formula is:
Final Drive Ratio=(Tire Diameter in Inches x RPM)/(336 x MPH)
So if I wanted to find RPM would I do:
RPM= ((final ratio)(336xmph))/ tire size ?