hehe no way of knowing. seen some people do it with no problem others fry and die
But if you drop the amps try to keep the watts about the same it should work. This will give you more rpm but less torque so it would only be good if you do a belt ratio
ghetto idea but you can always wire in power diodes in series for .7 voltage drop
got a suprlus store around you migh tbe cheap idea.