Additional field coils around motors

[KenWittlief]

The motors can only draw their power (energy) from the victors

and you cannot build your own motors

adding additional coils to the motors is an interesting idea, but those coils would be dissapating energy into the motors (magnetic energy), which is not coming from the victors - so it violates the rules

you could come up with all sorts of creative ways to increase the power of your drive train, making a steam engine for example - but no matter how you convert stored energy into mechanical energy a motor is still a motor - if its supplying more power to the drivetrain, its a motor, and its against the rules.