Wired the coils in parallel. Much better!
I still have too much input voltage though... managed to fry a brand new voltage regulator very quickly :(
Input voltage gets up to about 45V with no load, too much for my regulator.
It was keeping a super steady 14.40V until I revved it up, then just let the voltage through unregulated.
Maybe time to rewind with thicker magnet wire and less wraps...
I've got a Hella voltage regulator from maybe a car alternator? coming in the mail tomorrow.
I'll see how that does.
If it too pops, time to re-wind.