Calculate Rear End Gear Ratio Needed
Enter the maximum potential safe engine RPM. Enter the tire size diameter and the target vehicle speed in MPH. Click on Calculate. The value will be returned in estimated differential gear ratio, based on the entered values. To do another, enter a new set of values.
Speedmaster Tools
Engine / Performance
- - Bore Size & Bore/Stroke Ratio
- - Carburetor Size Needed
- - Engine Size
- - Engine's Compression Ratio
- - Fuel Injector Flow from change in Fuel Pressure
- - HorsePower from Intake Airflow
- - Horsepower gain from adding Blower Pressure
- - Intake Airflow from Horsepower
- - Rod Stroke Ratio
- - Stroke Size
Rear Gear Requirements
- - Rear End Gear Ratio Needed
- - Speed from RPM, Rear & Trans. Gear Ratios
- - RPM from Speed, Rear & Trans. Gear Ratios
Drag Strip Performance
- - 1/8 Mile Horsepower Requirements from MPH
- - 1/8 Mile Horsepower Requirements from ET
- - 1/8 Mile ET from MPH
- - MPH - Km/H in 1/4 Mile using Horsepower
- - 1/4 Mile Horsepower Requirements from MPH
- - 1/4 Mile Horsepower Requirements from ET
- - 1/4 Mile ET from Horsepower
- - 1/4 Mile ET from MPH
- - MPH from 60 foot time