Currently have a 1.5HP Hayward super pump that died. I suspect this pump was a quick cheap fix for the previous owner prior to sell. (Pad is 2" plumbing but reduced at pump to 1.5" on each side).
Existing flow seems fine to me but I may not know any better.
Odd thing to note is my equipment pad is ~6' above the pool so priming takes a bit of finesse but not too big of a deal although it may play into the overall sizing.
Time to upgrade with a couple goals in mind.
1. Want 2 speed for energy savings (current pump used to run 24/7 at cost of approx $150/mon). I'm also going to install a timer with this new pump so overall savings should be significant.
2. Want it quiet (current pump has been annoying, the pump sits right outside of the master bedroom window.)
Trying to make a cross reference in performance it looks like I could move to a WhisperFlo 011486 WFDS-4 which is a 1HP Dual speed. So in marketing speak a "downsizing" of pumps but looking at the SFHP appears to be an actual slight up sizing at high speed setting.
I do plan to fix the pad plumbing at install of whatever. The less noise potential of a VS pump is attractive but I can't see the payback for my short 3-4 month season. The 2 speed seems best. Looking for a sanity check on sizing and if this is a good choice of pump.