[Lorenfb]

"And by pure chance(??) that is EXACTLY what results from the use of 450 volts sv 300 volts applied to the primary does."

The key factor is the dv/dt of the spark pulse and not absolute voltage. Do a little research into
why a CDI was used versus an inductive discharge is the late '60s, i.e. because the rise time
(key for firing fouled plugs) of transistors back then were limited. Now days with COP OEM
ignitions systems the max spark signal is about 300 to 350 and NOT the unnecessary 450+ volts
of the MSD. With coil turns ratios of 100 to 1, 20KV to 30KV is all that's necessary.