RPM calculator
Gear Ratio
Tire Radius
MPH
RPM =
CFM needed
Engine size (cid)
Max RPM
Volumetric Efficiency *
CFM Needed =
* .80 is a good estimate for a mild performance engine
Horsepower From MPH Calculation:
1/4 Mile
Speed (mph)
Vehicle
Weight (lbs.)
Horsepower
Liter/CID Conversions:
Liters
Cubic Inches
Displacement Calculation:
Bore
Stroke
# of Cylinders
CID=
Miles per Gallon:
Miles
Travelled
Gallons
Used
Miles Per Gallon
Kilometers per Liter:
Kilometers
Travelled
Liters
Used
Kms Per Liter
Hot Rod Math, Courtesy of Giancarlo Traverso at www.forerunners.com