This was actually described to me by Jojje, the Wild Swede with the Turbo Bonnies. That is also the reason he doesn't do the 270 ignitors and just the 360s.
Also the reason Jojje made a custom ignition system for Bill Gately's flat tracker which uses the really big bored 270 motors as well. Big secret what he did for him and ther is some agreement between them NOT to share this info either. They don't want to give away any advantage on the track. Reason enough for me.
If you want to learn more about it, drop Jojje a line, or maybe one of the real electrical engineers here can chime in with the full technical explanation and make your brain hurt.
