Zubbly,
Plate reads 1 1/2 HP, Service factor 1.15, volts 230/460, 3 phase, 60 Hz, Amp 5/2.5, RPM 1735, Time rateing Cont. She is a nice, finned cast aluminum body.
Magnets are 4 pole, 2 arc neos per pole, neos 7/8" wide by 1 1/2" long each. The neos go beyond the end of the rotor (wasted) by around 1/4". On each side of the pole are 2 samurium magnets I had laying around. My poles aren't quite wide enough so they help. All glued on with lots or JB Weld.
Wireing is the stock "low voltage" scheme which I believe to be delta. I tried twice to find the connection point and gave up twice for fear of ruining it.
Testing was spinning it with a 90 VDC 1/2 hp motor which has an attached generator/tachometer rated at 20 RPM/Volt. I would run the output directly to my main 24 volt battery bank through an amp meter. I would get her running, read the amps and battery bank volts, volts X amps = watts, and record the generator/tach voltage X 20 to get the RPM.
I spent some time searching the board and the 1 1/2 conversion you sold on E-Bay was the only posting I found that showed Watts vs RPM (though I swear I've seen other postings in the past). My output looked to be a little below yours, but not enough to be ashamed of.
Thanks,
-Henry