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Fuel Injector Size Calculator

  





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These equations are for recreation only.

Selecting the proper size injector

Fuel Injector Size Calculator
Horsepower (at the flywheel)
Number of Injectors
B.S.F.C.

Max Duty Cycle in %

Input All Data please


HP from Fuel Injector Size Calculator
Injector Size (lb/hr)
Number of (same size) Injectors
B.S.F.C.

Max Duty Cycle in %

Input All Data please

Brake Specific Fuel Consumption:
Around .45 to .52 for naturally aspirated engines,
.55 to .60 for supercharged engines,
and .60 to .65 for turbocharged engines.

Maximum Injector Duty Cycle should not be more than around 80% max for safe operation.