Response to Hi Gil, We would suggest the Variable Speed over the Dual speed as there is not much of price difference but the operational cost savings with variable speed is much greater than dual speed. Yes you can upgrade the motor on your Hayward Super Pump to this 1.65 HP Variable Speed Motor If you wanted to take advantage of the higher speeds of this motor then I would suggest upgrading to this 1-1/2 HP Super Pump Impeller and you will need this Hayward Super Pump Seal Kit when you replace your motor. You will save a ton on your operational costs by upgrading to a Variable Speed Motor normally 50%-70%.  Here is an article we wrote on the Energy Savings of a Single Speed Pool Pump Vs. a Variable Speed Pool Pump.

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