Ever wonder what changing tire diameter or gear ratio will do to your engine RPMs? How about changing combustion chamber size, bore and stroke or even weight to power ratio?
This handy little slide rule will give you the answers. Everyone needs one!
- MPH, Power to Weight Ratios, and E.T.
- Tire Diameter to Speed and Gear Ratio
- Engine Displacement to Compression Ratio
- Horsepower Measured at Flywheel
- Horsepower Ratings are Calculated for RearWheel Horsepower