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Fuel Injection Calculations  Use this page to estimate fuel injector size. BSFC is the amount of fuel consumed  for each horsepower made. This should be .45 to .50 for naturally aspirated engines .55 to .60 for supercharged engines and .60 to .65 for turbocharged engines.

Flow conversion

Convert cc/min to lbs/hr

Convert lbs/hr to cc/min




Fuel Injector Size Calculator
Flywheel HP
Number Of Cylindars
BSFC See Notes

Max Duty Cycle in %

Required Injector Static Flow Rate @ 43.5 psi lb/hr

cc/min


Fuel Pressure Modification



Fuel Flow Calculator

Old Pressure

New Pressure

Old Flow Rate

New Flow Rate

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    • Injection Calculators
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  • Fuel Injector Parts