Stop in for a cup of coffee

halifaxhops said

Makes sense. Might have to open some of my old electronics books for this one to re learn some of what I forgot! Dam good question though, and if so why are not racers using them? I know the different coils need a different voltage drop but past that need to look up the theory again.

Click to expand...

Here's where I got the idea that excess is wasted energy. And therefore current flowing through the coil is just genrating heat.
Scope pattern for the Duraspark from the '82 AMC jeep shop manual.


and the HEI pattern which is a little different but same idea.

seems to have less leftover ??? maybe because its current controlled ??