The SUPER AFC II is a fuel adjustment controller in which the airflow sensor signal or the pressure sensor signal can be modified in a 12 point RPM range by 1% increments to increase/decrease fuel in a range of ＋50% to －50%. The RPM to be corrected can be optionally set in 200 RPM increments, and corrections can be made according to throttle opening amounts. In a turbo equipped vehicle with a hot wire type airflow meter, this controller provides a preventive function for engine stall due to blow-back during throttle return. The controller, which includes a knocking meter, allows the monitoring of knock levels check keeping the engine under its optimum condition at all times. (Vehicle must have a factory knock sensor

Step by Step install
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Instruction Manual
https://apexi-usa.com/manuals/electronics/safc2_manual.pdf

Wiring
https://apexi-usa.com/manuals/electronics/safc2_wiring.pdf