If you want to know how much HP an injector can support,here is the formula for figuring that out.

((Injector flow rate in lb/hr X # of injectors) / Break Specific Fuel Consumption) X Maximum duty cycle of injector

so, if you have a 44 lb/hr injector on a V8 that will make a .5 BSFC and you want a maximum of 85% duty cycle (this in how long the injector is spraying fuel per cycle. 85% is a good baseline) here is the results;

44 X 8 = 352, 352 / .50 = 704, 704 x .85 = 598.4 HP.

Our injector flow values are based on a 43.5 psi fuel pressure. If you change the fuel pressure, you will need to know the new flow rate to make the formula work.

Formula for injector flow vs. pressure;

(Square Root (new pressure / old pressure)) X old pressure

New pressure = 60, old pressure = 43.5 with 44 lb/hr injectors;

60 / 43.5 = 1.378, sqrt 1.378 = 1.174, 1.174 X 44 lb/hr = 51.7 lb/hr

This new flow rate would allow the following HP calculation;

((51.7 X 8) / .5) X .85 = 703 HP

((Injector flow rate in lb/hr X # of injectors) / Break Specific Fuel Consumption) X Maximum duty cycle of injector

so, if you have a 44 lb/hr injector on a V8 that will make a .5 BSFC and you want a maximum of 85% duty cycle (this in how long the injector is spraying fuel per cycle. 85% is a good baseline) here is the results;

44 X 8 = 352, 352 / .50 = 704, 704 x .85 = 598.4 HP.

Our injector flow values are based on a 43.5 psi fuel pressure. If you change the fuel pressure, you will need to know the new flow rate to make the formula work.

Formula for injector flow vs. pressure;

(Square Root (new pressure / old pressure)) X old pressure

New pressure = 60, old pressure = 43.5 with 44 lb/hr injectors;

60 / 43.5 = 1.378, sqrt 1.378 = 1.174, 1.174 X 44 lb/hr = 51.7 lb/hr

This new flow rate would allow the following HP calculation;

((51.7 X 8) / .5) X .85 = 703 HP

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