Basically it increases the ignition voltage of the spark. Multiple Spark Discharge. If I remember right, under 3K rpm's the spark plug ignites 3 times at each fire, above 3K rpm's it jumps up the voltage so there is a hotter spark. Too bad it wasn't a 6AL, you would have had an adjustable rev limiter.
In theory, it should ensure a more complete combustion burn, increasing fuel efficiency, increase power, reduce misfire, etc.
90 LX, Previous 4 cyl.
408W In the Works
TW FAC's, Jay Allen cam, Super Victor
2001 V6 5 Speed Daily Driver
Windstar Intake, Dual Exhuast, CAI, Headers
Best ET: 15.44@91 mph (on 18's)