Fuel Flow Calculator

Number of Cylinders:

Engine Horsepower (HP):

Base Fuel Pressure (psi):

Boost Pressure (psi) – if applicable:

Induction Type:

Naturally Aspirated

Turbocharged

Supercharged

Fuel Type:

Pump Gas (10% ethanol)

E85 (85% ethanol)

Methanol

BSFC (Brake Specific Fuel Consumption) – lb/HP/hr:

Typical values: NA Gas 0.45-0.5, Turbo Gas 0.55-0.65, E85 0.65-0.75, Methanol 1.0-1.2

Total Fuel Flow Required: lb/hr

Fuel Flow Per Cylinder: lb/hr

Injector Size Required:
lb/hr or
cc/min (at 80% duty cycle)

Effective Fuel Pressure: psi

Note: 1 lb/hr ≈ 10.5 cc/min (varies slightly by fuel density)