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Hot Rod Math

Page courtesy of ScottSS
Please read disclaimer in source.

Estimates horsepower based on vehicle weight and best ET. Vehicle Weight (in lbs. with driver) Best Quarter Mile E.T. (seconds)

RPM calculator

Gear Ratio	Tire Radius	MPH
	RPM =

CFM needed

Engine size (cid)	Max RPM	Volumetric Efficiency *
	CFM Needed =

* 1.0 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

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