Welcome to Speedmaster™ Tools—your go-to resource for precision automotive performance calculations. Whether you’re optimizing engine specs, refining gear ratios, or enhancing drag strip performance, we’ve got the tools you need.
Use our calculators online now using the left menu or download our app! Available on the App Store and Google Play!
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