It works!
The good:
Speed increase is real. The increased cruise speed feels downright liberating, I hit 23-24 kph on my 10 cell battery during some quick testing. Still not fast, but way better than the 14 I used to get.
The bad:
Torque took a nosedive. That’s expected, so I compensated by increasing peak motor current from 50A (oof) to 85A (oof) despite being a bit antsy about even the original value. Still wasn’t enough to reach original torgue value, although theoretically it should be (+70%). Not sure why it doesn’t scale, I assume it’s not saturating since control remains good and smooth all the way up there.
I’ll sure leave it as is, the cruise is so much improved. But the lack of torque means I’m no longer able to ride up a particular hill that used to be no problem, and there’s less margin for error when hitting bumps. Curiously, I was able to tune the PID much better now, “death wobble” after something saturates the control is much more manageable. Maybe the lower inductance…?
For anyone building something similar, definitely go with a 12S battery, there’s a good reason higher voltages are used with these hubs. More would be better, but that needs something else than a standard VESC. In my experience the Phub-188 600W version is just at the edge of being good. If the 800W version really has a longer stator, that + this termination mod + 12S battery could be a very nice combo with standard VESCs. Anyone orders and opens that, please take the dimensions 