Looking through local used car listings, I find there are a lot of 4WD trucks going cheap. I was considering a direct drive system with twin/siamese motors (like EVWest sells in a complete kit here), but I'm looking at 4WD systems and thinking I could do one of those. I have some questions, though.
GM trucks use a torque split device, which looks like it outputs to 2 shafts with spicer yokes on them. This would work well, but do the two shafts turn at the same speed? Do they turn in the same direction, or is one flipped?
The kit in question uses 2 controllers (obviously) in a master/slave configuration. Do they require the motors to turn at exactly the same speed, or is there some slip (so it would work like a differential)? How would performance be with two motors joined "through the wheels"? Will the setup support flipping one motor's output, or would I have to effectively wire it in reverse?
[edit]To clarify, I'm suggesting buying 2 motor/controller kits, setting them up in master/slave configuration like they do for their siamese kit, and having 1 motor power each drive shaft/differential (one to the front, one to the back). Though I suppose if the diffs turn the right way, I could get the siamese "joined" motor and drive the front wheels from the tailshaft and the rear wheels from the main shaft, effectively having a rigid connection from front to back. That, however, would lead to issues with transmission wind-up and the like, I think.[/edit]
GM trucks use a torque split device, which looks like it outputs to 2 shafts with spicer yokes on them. This would work well, but do the two shafts turn at the same speed? Do they turn in the same direction, or is one flipped?
The kit in question uses 2 controllers (obviously) in a master/slave configuration. Do they require the motors to turn at exactly the same speed, or is there some slip (so it would work like a differential)? How would performance be with two motors joined "through the wheels"? Will the setup support flipping one motor's output, or would I have to effectively wire it in reverse?
[edit]To clarify, I'm suggesting buying 2 motor/controller kits, setting them up in master/slave configuration like they do for their siamese kit, and having 1 motor power each drive shaft/differential (one to the front, one to the back). Though I suppose if the diffs turn the right way, I could get the siamese "joined" motor and drive the front wheels from the tailshaft and the rear wheels from the main shaft, effectively having a rigid connection from front to back. That, however, would lead to issues with transmission wind-up and the like, I think.[/edit]