- Wed Jan 10, 2018 12:42 pm
Wired hit the main points. A few minor things: if you wire the motors in series you'll have the "open-differential" behavior -- where a wheel with low or no traction will spin 2x as fast as normal and the other tire (which has all the grip) will do nothing. Beyond being annoying, this can be potentially destructive if you're doing this on a 6V motor running at 18V, as the freewheeling motor will be spinning far above its intended RPM (3x original speed).
Wiring them parallel @ 12V would give you full drive on both wheels. It would be 2x the speed of the original as well as 3-4x the total torque, since it's now two motors driving. If you want to preserve a "slow" capability but still have the drive option, you may also want to consider getting the switch/wiring from one of the 12V power wheels and installing it, since that effectively provides a parallel vs. series switching capability (reverse/1st gear run motors in series, 2nd runs the motors in parallel).
F-150 - 24-36V with homebrew 100A variable-speed motor controller, 4x 775 motors (no, it's NOT all-wheel-drive--look up 'quad damage' in the gearbox section for more info!)
Princess Mustang - 24/36V, 4x 775 motors, awaiting a speed controller....
Hurricane - 24V w/50A step-down controller, 775 motors