Battery and motor amps problem
 

Dear all,
I recently bought an 1:10 electric buggy, which is my first large scale rc car, and while it's being shipped, I went to a nearby hobby shop an purchased a 7.4v 2S 4000mah 30C (burst 60C) Li-Po battery. According to online information 4Ahx30C=120A. Does that mean if I am planning to upgrade the motor and esc to brushless, I have to find those specifying 120A or above? If I have a 60A brushless motor with the 120A battery will the battery cook the motor and destroy my setup? Or does it work the other way?

Many thanks,

It works the other way. A 120A battery with a 60A motor is fine. Don't want to max out the battery, want to have extra capability. Same for the ESC, want a little extra to be safe.

Ideally:
Battery amps > ESC amps > motor amps

Although the motor maximum amp value isn't always readily available for RC motors.