Dear Mr Daisuke , i will confirm the configuration with D.Jorge but i think that we can use more voltage or more motors I think that D.Jorge want a more 1000hp supercar , your idea of 2x 6 motors is successful but needs 12 controllers, a bigger cooling system and more space, i will confirm it with D. Jorge. Maybe add more 1 motor in series with different settings, set last as a generator to help others to recharge batteries in regenerative braking, possibly all a little new to you but will offer all possible support for this project and projects futures.