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looks like the specs for an ac20 are about 80hp max and 65 foot pounds.
The torque might be a little low for direct drive, even with a vehicle sub 2000lbs all built out. Looking at hpevs.com, The AC23 might be a better bet, the tradeoff being you won't have as much high end power. Or, look at the AC35 or AC50. In any case, run the highest voltage system you can (144V with the curtis 1239 controllers it looks like)
As point of comparison, The AC55 in my xB has maximum torque of about 200ft-lbs, and I have an overall direct drive gear ratio of 4.8:1, and the whole thing weighs 3000lbs dry and empty. However I rarely hit max accel, I figure I probably keep it at or below 120ft-lbs most of the time going by the position of the throttle limiter (which limits peak motor amps). So proportionally speaking if you have a 2000lbs car, you'd want minimum 80ft-lbs with similar gear ratio (and wheel diameter) to get driveable performance. I think the 175/60r15 tires on my xB are pretty close to 23" diameter so your 24" tires would mean slightly less torque all else equal.
The torque might be a little low for direct drive, even with a vehicle sub 2000lbs all built out. Looking at hpevs.com, The AC23 might be a better bet, the tradeoff being you won't have as much high end power. Or, look at the AC35 or AC50. In any case, run the highest voltage system you can (144V with the curtis 1239 controllers it looks like)
As point of comparison, The AC55 in my xB has maximum torque of about 200ft-lbs, and I have an overall direct drive gear ratio of 4.8:1, and the whole thing weighs 3000lbs dry and empty. However I rarely hit max accel, I figure I probably keep it at or below 120ft-lbs most of the time going by the position of the throttle limiter (which limits peak motor amps). So proportionally speaking if you have a 2000lbs car, you'd want minimum 80ft-lbs with similar gear ratio (and wheel diameter) to get driveable performance. I think the 175/60r15 tires on my xB are pretty close to 23" diameter so your 24" tires would mean slightly less torque all else equal.