I *think* the a/c pumps have less blades. They also have a smaller pulley,
due to the a/c pulley being linked, so they should move a similar amount of
water.
Rob>
>My car has A/C, but somebody (probably me!) put the non-A/C pump in many
>years ago. With the new, correct pump in, I pulled a 4000-pound trailer
>over a 2000-foot pass at 86 degrees with the A/C on and never went past the
>high end of the normal range on the temperature gauge. A marked
>improvement over the past!
>
>If you're having difficulties keeping your engine cool, this might be worth
>a try.
>
>Ken Miller
>Portland, Oregon
>61 and 67 Converts (and a 64 New Yorker Salon)
>
>
>