Hi, I have an older pump it's a Hayward SP4010 NS. When I went to look at the motor to try and figure out what I could replace it with, I was hoping for a 2 speed that would be more energy efficient instead of having to go the cost of a whole now ECO VS or Max Flo... Then I saw that the motor on it is and Energy Efficient SP1610Z1. Now I am confused on how to find the right one to upgrade/change it to. I have 1400 gallons of water, inground cleaners, no water falls fountains etc... I am just looking to get a new motor that is more efficient and I already have a timer... Any help would be great!