No it doesn't really work that way. It depends on a lot of factors. The KV of the motor, the number of cells you use, etc. For example, on 4 cells and a 8x8 prop mine draws 60 amps and 800 watts. On 5 cells I would have to drop the prop down to probably a 7x7 or less because the motor will turn higher rpms and draw more . The idea being that the more cells you add, the lower your amp draw will be. High volts/low amps is the key to power. You have to find the combination that lets you stay in the range of your motor, speed control, and battery and still give you waht you want.
ORIGINAL: opjose
No it's not the same motor.
It's a Tower Pro ( sold as the BP2915D at BP Hobbies ).
This motor has a max capacity of about 500 watts, and is supposed to be the equivalent of a .30 sized glow engine.
Since yours is far more powerful, I would assume that it needs an even bigger prop to be able to draw more power.