By

I posted these on the Early Ford Registry website, and thought some on this forum may find them useful when calculating speed, rpm, horsepower, money value, displacement, etc......

Speed Calculator - put in distance and time to calculate miles/km per hour:

http://www.arkansasrunner.com/calculators/mileperhr.htm

RPM Calculator - enter three of four variables to calculate rpm, tire diameter, rear end ratio or speed:

http://www.advanced-ev.com/Calculators/TireSize/

Displacement Calculator - find engine displacement (inches or metric) by entering bore and stroke:

http://www.csgnetwork.com/cubicinchcalc.html

Inflation Calculator - find today's value of money from the early Ford period:

http://www.davemanuel.com/inflation-calculator.php?

Rough Horsepower Calculator - find hp estimate with compression ratio, rpm and cubic inches:

http://www.bgsoflex.com/roughhp.html