it doesn't matter what motor you have in it because when your car is unboosted (not hitting the boost button) the car is pulsing power to the motor causing it to go about half speed. when you push the boost button the pulsing stops and you get a full signal of power to the motor causing it go go fast. the car will send a pulsing of power to the motor with any motor whether it's a 1.0 or a 3.0.
HTH
instead of the pulsing it may also have a resistor but from what i have heard i think it pulses
P.S.
corect me if someone is more experienced than me.