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The ultimate calculator application designed for car enthusiasts by Speedmaster.

An essential guide for calculating specific areas in main featured categories: Engine, Gear and Drag.

Reach maximum performance and the ideal setup by using Engine calculator tools.
• 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

Calculate reliable rear end applications that’ll handle the current setup using Gear calculator tools.
• Rear End Gear Ratio Needed
• Speed from RPM, Rear & Trans. Gear Ratios
• RPM from Speed, Rear & Trans. Gear Ratios

Prepare for racing using the Drag calculator tools.
• 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

What’s New

Version 1.0

This app has been updated by Apple to use the latest Apple signing certificate.

Ratings and Reviews

3.0 out of 5
3 Ratings

3 Ratings

App Privacy

The developer, Speedmaster, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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