Sorry but you confused me with that you said I'm just saying that you need a lot of torque at steering, and a good speed at throttle/braking so you have good throttle responses. The speed of the steering mustn't very great because you may have oversteer or something problems, and the torque in throttle/braking mustn't be very great too because it's overkilling. If your brakes are good, then a 5625 hitec servo is good (like mine, but i recommend more torque because i have it too, but anyway, the brakes varies, it depends on your braking system)