i tried the traxxas motor and esc out of my slash in my tc4 and i found it was not nearly as fast as the 17 turn it came with. the motor is a 550 and it does have a kinda low turn but it is made for power and the fan in the end of the can is not making it any faster. the 540 you have would be better but you need a smaller spur most likely one in the lower 90's . but be careful check the turn limit on the esc and see if it can take a 11x2 i don't think it can i would personalty start thinking brushless . what is the brand of the car