As the title says I am thinking of making 10 sets of aluminum billet pulleys. What I am thinking of making are: water pump , alt, If possible Power steering pulleys. Machined finish you can polish if you want then. Not sure what a set will cost or sell for but just seeing if there is any interest. Maybe the belt tentioner pulley also as an add on.

Question should I speed up or slow down the water pump pulley? If so how much % wise.

Thanks,Mike