Water-Cooled VW Performance Handbook

On-line automotive performance calculators

Here is a small collection of automotive-related on-line calculators. Each is fairly easy to use, and addresses a single task. You will need to have JavaScript enabled in your browser in order to make use of them.

• Air flow in cubic feet per minute (CFM) and horsepower
• Compression ratio
• Engine displacement
• Horsepower from measured torque
• Horsepower estimates based on ¼-mile ET and speed, and vehicle weight
• Horsepower loss due to altitude
• Linear (distance) conversions
• Maximum MPH for tires and gearing
• Quarter-mile ET and speed estimates based on weight and horsepower
• Skidpad g
• Valve sizing
• Volumetric conversions

If you’re really ambitious, here is a program in BASIC to help calculate optimal shiftpoints, as described in my book.