I know from goofing around with small DC motors, the less turns the faster it will spin the more energy it uses, more turns makes more power but it's slower and uses less energy, no clue why or how.....

Not sure if that helps anything at all,adds to confusion, or doesn't apply here? I would imagine it's the same idea's.

I don't know much about electronics 101....What I do know from playing around with small DC motors. Less turns get you more speed, more rpms, but less power and the battery used will die quick.

More turns(using same wire) will reduce speed and give you more power, stronger motor, the battery will last longer.

This may not apply to a pop bumper coil though. I know it does for fact apply to RC type stuff. We would get our cars faster by taking a 38 turn motor and unwinding to 15 or even 9 turns depending. But at 9T the battery would not last and the car didn't have much take off power, once it got going it would be fast though..