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Using this formula, you can find the approximate injector size for your modded engine. If your car is boosted, use 0.60 for the BSFC value and 0.50 if it's naturally aspirated. B.S.F.C is brake specific fuel consumption-how much fuel you are using per horsepower per hour. We've included a formula to convert lbs/hr to cc/min, the latter of which is the standard for imports.
Planning Your Fuel System

Using this formula, you can find the approximate injector size for your modded engine. If your car is boosted, use 0.60 for the BSFC value and 0.50 if it's naturally aspirated. B.S.F.C is brake specific fuel consumption-how much fuel you are using per horsepower per hour. We've included a formula to convert lbs/hr to cc/min, the latter of which is the standard for imports.  View Related Article

 

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