Turbo Compressor Sizing Calculator
Liguori Drag Racing • Forced Induction
All calculators / Forced Induction
Turbo Compressor Sizing
Find the airflow and pressure ratio to compare against compressor maps.
Starting values are examples. Enter your measurements; results update as you type.
Method & assumptions
Use crankshaft horsepower, BSFC and target AFR for the actual fuel. Fuel mass flow is horsepower × BSFC; air mass flow is fuel flow × AFR / 60. Fuel specific gravity does not change this mass-to-mass calculation. Pressure ratio includes entered pressure losses. Inlet CFM is actual volume flow at inlet temperature and pressure. Compare with a manufacturer map; these values do not identify a wheel diameter or turbo model.