New water pump 6 impellers whats up with that!

my5thmopar said

I will. I ordered one from Oreillys last week and it was suppose to be an 8 vane but it was substituted with a 6. I'm being told that they are redesigned and all are 6 vane. I'm still uneasy about using a 6. Will keep ya posted. The one I ordered Monday is going to be shipped from Cardone......we will see. I'm wondering if anybody here is already using a new 6 vane on an A/C car. Chime in please.

Craig

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Thanks Craig and I'll let you know if the one I get is a 8 blade also. If there's one area that I don't know a good amount about on a car it's water pumps. I have just always assumed that the more blades the more water it'd move but after lilcuda's comments I wonder if I have been mistaken all along. I just checked the FedEx tracking and mine is scheduled to be here today and hopefully it's a 8 blade as I have the 6 blade they sent me here to compare it with. What lilcuda says about a 6 vane possibly moving more water due to larger vanes makes sense. If they weren't such an odd shape I could figure the area easy. I think more blade area would equal more flow?? My application is different than yours as I don't have A/C. I have the March under drive pulley's so that was my reason to think I needed a pump with more blades to move more water since it's running slower and mine runs a little warm in the summer. If you can't find a 8 blade an old trick to help prevent cavitation I've heard is to run one of the Flowcooler (I think that's the brand but I might be wrong) discs that rivets to the back side of the blades and encloses them. It's also supposed to help it pump more. I bought one from Summit a few yrs. ago but just looked and I don't see it listed now.

Maybe Lilcuda has a comment on whether or not he thinks it would help with cavitation.