Will a two-speed motor work with an older pump?

[stualden]

Thanks poolman. What would I need to know to determine the right horsepower and the right impeller for the new two-speed motor?

The pump right now seems to be sized correctly for the pool; the motor is a 1 hp (with a service factor of 1.0 according to the label). I need to check again but I believe it has the 1 hp Ultraflow impeller as well.

Thanks again.