That brings up an interesting point I had not thought about before. Why not just put a very slightly larger pulley on the water pump. For instance, going from a 6" pulley to a 6 1/8" pulley gives you a circumference increase of 1.19" (a 4.2% increase). Wouldn't that make the pump spin a bit faster and, therefore, move the water a bit faster? I would think that the impeller design will eventually be maxed out and not allow an increase, but 4% over stock should not reach that maximum. What do you think,
@Newbomb Turk?