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Basic Fuel Injector Calculator

This is a Basic Formula to see where your fuel injector stands. We do not recommend using as a complete fuel system tool, but rather a quick reference to about where the injector itself can get you.

We recommend to use the Advanced Calculator for an exact calculation on the fuel delivery.

Fuel Injector HP Efficiency

1. Enter the LBS/hr of Injector -
2. Enter the Duty Cycle on the Injector - (Ex .8 for 80%)
3. Enter the BSFC you're figuring - (Ex .5 for Gas N/A, .6 to .7 for Gas Boosted, E85 Boosted .75 to .9)
4. Enter the Number of Sime Size Injectors you're using -


Efficient HP Support for the Injector(s):