W/O ESC

The Spark Control Computer is the heart of the entire system. It gives the capability of igniting the fuel mixture according to different modes of engine operation by delivering an infinite amount of variable advance curves. During cranking, an electrical signal from the distributor is fed into the computer. This signal will cause the computer to fire the spark plugs with a fixed amount of advance. Once the engine starts, then timing will now be controlled by the computer based on the information received from the various sensors.
The computer consists of one electronic printed circuit board, which simultaneously receives signals from all the sensors and within milliseconds, analyzes them to determine how the engine is operating and then advances or retards the ignition timing.
The computer determines the exact instant when ignition is required; and then signals the ignition coil to produce the electrical impulses which fire the spark plugs.