Better water pumps?

[pishta]

Which pump would you run on a stroker?

[72Challenger]

Looks can be deceiving, but I'd guess the one with more, smaller vanes will use less horsepower and move less water, at least at lower RPM. If you don't have a cooling problem, it may give you a couple extra horses. Since it also looks used, I'd check to make sure the bearing is okay and it doesn't leak first. If you're having overheating issues, maybe the full-width vanes would keep you cooler.

But I'd question why the vanes curve in opposite directions. Is one of those a reverse-rotation pump?

[pishta]

Not reverse rotation, the modern one "flings" the water outboard, while the old one acts like a prop, biting into the water and forcing it outboard. The old one doesnt leak as there is not a track going down from the weep hole as all my leakers have. But the impeller is so much smaller on the new pump and I do have a cooling problem so Im going to try the Circa 1965 Super Stock large impeller pump.

[hellhound]

Originally Posted by pishta

Not reverse rotation, the modern one "flings" the water outboard, while the old one acts like a prop, biting into the water and forcing it outboard. The old one doesnt leak as there is not a track going down from the weep hole as all my leakers have. But the impeller is so much smaller on the new pump and I do have a cooling problem so Im going to try the Circa 1965 Super Stock large impeller pump.

Is that also how they cut back on the upper RPM cavitation (again Ill say "fluid dynamics is something I dont know alot about) but I think it would be interesting to know why the change.

[pishta]

Just found out that the new pump puts out 39.6 Gallons/Per Minute At 4,000 RPM, care of Bouchillon Performance Engineering. Im going with the new one.