This calculator will provide the injector size required for your performance application in lb/hr per injector.

Number of injectorsthe total number of injectors on your engine
Maximum duty cyclethe maximum time the injector is on vs off. Maximum recommended is 80% of on time.
Fuel type / applicationRefers to the Brake Specific Fuel Consumption for the application. Values used in the calculator are:
Naturally aspirated (gas) 0.5
Forced induction (gas) 0.6
Ethanol 1.08
Methanol 1.2
Target horsepowerthe target horsepower of the engine
pounds per hour per injectorinjector sizing required for the engine
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