Seems like a rewound alternator, or DC generator head, are about the only options. You could also stack an AC motor on top of the DC motor for extra power and built in regen, if it ran the same voltage, expensive though.
Not that I've ever heard of. Saying "get a sepex" sounds good, until you actually try to do it.Are there Sepex controllers available that run to 144-156V?
I do love my system Just put it in second gear and go, all the way to 65 mph. Doesn't have the off the line pull of a DC series motor but it's plenty for normal driving, and there is always first gear if I want a quick shot from 0-35 mph.Just a suggestion, but have you considered dropping your system low enough to run a sepex or AC motor like JRP3? His Fiero has fully functioning regen setup and seems to have enough pow - well, I'll let him tell you how it runs