40,000 is just a little bit unrealistic for what is being done here , don't you think?i agree with Cogsy, i had tested a homemade hall circuit, waste fire ignition the other day on a 4 cylinder dummy crank (turned by an electric motor for testing) and it started doing strange things past 40 000 rpm (forty thousand rpm) plus ... please dont try rev that high Michael... Nice Build By The Way!!!
Even with wasted spark arrangement.
I built a straight 4 cylinder 25cc that runs on methanol and glow which will turn 10,000 however rarely seen anything else that will get to that level.
Usually a mass of spluttering much below that.