Have a Pentair Whisperflo WF-26, 1.5hpx1.1sf. Long story short, I'm pushing about 65gpm on a clean filter, in a ~32k gallon pool. I've probably got some fairly restrictive plumbing (and a 6-way multiport) and would like to push more water- not to turn it over quicker, but to get more actual "circulation"- without my Polaris running, whenever I get some "stuff" in the pool, it just sort of sits there. I can't do anything about the plumbing, number of returns, etc. (though I've thought about running a switched bypass around the multiport as well as the heater)- so I'd like to upsize the pump. Particularly, I've got a 2-speed 2x1.1 hp motor hanging around with a square flange that should mate up- but a few concerns-
1) going from 1.5 to 2- is that too much of a change for the pump impeller?
2) with a non-matched impeller, would I be getting more or less flow than I'd expect (guessing less)?
3) is this a bad idea from the get-go?