If you are referring to Motors I would assume any of the higher rpm motors would pull more. Personally, I like the Tamiya motors and my go to for strength and speed would be the Power Dash but they have doubled in price over the last few years. Good thing I stocked up on them when they were just under $5. But really, I think the other Tamiya motors may be perfect too. Have you seen the motor comparison video from member Toys,trainsThings?
As far as the connectors...are you talking about the ones with a hole on each end and have a loop for running a wire through?
As far as the connectors...are you talking about the ones with a hole on each end and have a loop for running a wire through?