It's simple math. Divide the diameter of your crank pulley by 0.95 and you get the diameter w/p pulley you need. Over cooling won't hurt either though. Divide crank pulley by 1.4 and that's the w/p pulley diameter used to cool a/c cars but with a 3.5" diameter w/p w 6 vanes.My car is originally an ac car. Was going to use the crank pulley. Guess I can’t do that? If not I will need a crank pulley also.
Matt
seems you would want a smaller water pump pulley with ac so it would spin faster, do mean divided crank pulley by 1.4 would give a smaller 5 inch pulley ? my ac pulley is 5 inchIt's simple math. Multiply the diameter of your crank pulley by 0.95 and you get the diameter w/p pulley you need. Over cooling won't hurt either though. Multiply crank pulley by 1.4 and that's the w/p pulley diameter used to cool a/c cars but with a 3.5" diameter w/p w 6 vanes.
Yes, you are correct. I mixed up the 2. I'm going to edit, thanks. And the reason for smaller diameter pump n fewer blades for a/c water pump is cavitation. However I use 1.4:1 ratio w a Flowkooler high volume w/p but also use Water Wetter and have had no issues. But when keeping stock, I prefer to go w what the engineers designed which is what the attachment above shows. Thanksseems you would want a smaller water pump pulley with ac so it would spin faster, do mean divided crank pulley by 1.4 would give a smaller 5 inch pulley ? my ac pulley is 5 inch