As I understand it the breaker points are the limiting factor as to how much useful voltage you can get. You can have 100k voltages but if there is not enough current it won't be hot enough to ignite the gas. The old saying that it's not the voltage that will kill you it's the amps. The more amps you put across the points the quicker they will burn out. That's why the old capacitive discharge systems and HEI were/are better.
btw The MSD magnetos are differentiated by their amps not voltage. The Top Fuel Nostalgia dragsters run two 44 amp magnetos. The Junior Fuel Nostalgia Dragsters run one 22 amp.
Larry
