The power out put of the prop is rpm times the torque.
So to get max power you need the props to be going as fast as possible and the torque to also be at max.
As for the go-around itself the aircraft with flight directors do have a GA button on the power levers which then command straight ahead and what ever is the best pitch for the GA.
The actual flying of the GA according to my mates who are now on jets is exactly the same apart from their auto throttle takes care of the power where as us TP drivers have to set it manually. The jet boys do say though that sometimes getting the full whack of power is more work than the manual setting of about 70-80% and asking the PNF to trim it if required.