It once was believed that you could improve combustion by extending the firing line. Later it was discovered that extending the firing line was like tossing matches on a forest fire -- the fire was already started! Instead, the intensity of the HV spike is where it counts. Multi-spark (MSD) sends a 2nd, 3rd... spark into an already-burning ionized path. A single more intense spark will do more good than several weaker sparks. If you want to know how deep the ignition rabbit hole goes, look up Plasma Discharge Ignition (PDI). Arvind Servanisand created the Aqua Pulser ignition system that blows Pulstar away. I played with the Aqua Pulser for about a year, but couldn't keep spark plugs alive. Initially it would just burn the electrodes (like an arc welder). The last attempt used Brisk electrodeless (aircraft) plugs. It didn't burn the electrodes, but burned right through the ceramic! I still had misfires!!
I've seen YouTube videos of guys adding PDI to small engines and running them on water (thus the origin of the Aqua Pulser name). They don't run very well, BUT THEY RUN ON WATER!! The only modification is the PDI; no internal engine mods.
