Turbo Size Calculator

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Calculates the recommended turbocharger size based on engine displacement, desired horsepower, and redline RPM.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Engine Displacement (L), Desired Horsepower (BHP), and Redline RPM in the units shown.

Step 2

Read Estimated Compressor Flow (lb/min) and Turbo Size Recommendation in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Engine Displacement (L): 2; Desired Horsepower (BHP): 350; Redline RPM: 6,500

Estimated Compressor Flow (lb/min): 35 lb/min; Turbo Size Recommendation: Small Turbo

Engine Displacement (L): 2.5; Desired Horsepower (BHP): 500; Redline RPM: 7,000

Estimated Compressor Flow (lb/min): 50 lb/min; Turbo Size Recommendation: Medium Turbo

Engine Displacement (L): 3; Desired Horsepower (BHP): 600; Redline RPM: 7,500

Estimated Compressor Flow (lb/min): 60 lb/min; Turbo Size Recommendation: Large Turbo

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