How does an SFC or Fuel Computer work?
SFC stands for Simple Fuel Computer. It’s a piggy back computer which means it wires into and works with the factory computer. What it allows you to do is adjust the amount of fuel going to the motor at a given RPM by increasing the duty cycle or the amount of time the injector sprays during a pulse. This allows you to keep a constant 14.7 to 1 (is that right?) air fuel ratio throughout the RPM range even with the added air from the turbo. The actual ratio you would want is more like 12 to 1 to be safe on a boosted engine.
