Which one flows better, factory 6 blade water pump or 8 blade

Johnny Dart said
I'm only talking about the water pump pulley and water pumps. Never did I say anything about crank pulleys.

Fact:
AC cars: 6 blade water pump, small water pump pulley.
Non AC cars: 8 blade water pump, bigger water pump pulley.

Good, neither did I.

Fact. They put both behind both depending on the app. I've torn apart more cars, trucks, Van's than I could even count.

Pop quiz
..The impeller shaft is bigger on one pump than the other, which is it?
Thanks for playing.