Grin All-Axle update
The motor was all packed up and returned to Grin. Im convinced something in the integrated torque/pas sensor is the problem. I tried negotiating with this in mind to knock off some $$ off the price (torque sensor is more $ than pas only) but they didnt seem to bite.
Shipping back to Canada was $55 from Colorado. While I love Grin products, the shipping always pisses me off, especially if you want to have some non-warranty work done like replacing motor wires that I had to do on a GMAC. Two way shipping plus shop work was around $200.
I might return to this motor at a later date(next year), I will play with the RH212 and GMAC until then.
RH212/Statorade Updates
Such a beast of a motor, did a worst case 6 mile run (3% average grade) on full throttle (2000 watts initial, reducing to 1500 watts) in 100F heat and motor got up to 77C. Speeds ranged from 28mph to 35mph depending on grade. I have the phaserunner set to 90A phase and 40A battery which my new 21700 pack can easily handle.
I dont see how this motor would ever be the limiting factor at 52V unless your going up a 10%+ hill, in fact the limits now are battery packs, phaserunner and L1019 connector. EM3EV 52V 18650 battery packs with good capacity cells(GA or 35E) seem limited to 30A continuous. My new 52V 21700(50E cells) packs are good for 40A continuous. That being said, the next thing is the Phaserunner. While it can output 2000 watts at 52V with phase amps up to 90A, it only does this for a limited amount of time due to thermal rollback. Basicallly what you see is initial power at 2000 watts tapering off to a constant 1500 watts or so. You can buy a heatsink for the Phaserunner which I will buy eventually but even then, the L1019 connect is the next bottleneck. Max speed on the flats is right at 35mph.
Overall Hub Motor Thoughts
The 52V 30A GMAC/Phaserunner is a really good overall package. It will overheat at the upper end of power but has excellent low end torque and usable torque everywhere without shifting gears. On my rides, its fine for 90% of rides and its only on the most extreme days battling 15+mph headwinds doing my test case run (6 miles at 3% average) as fast as posssible where it overheats. My next door neighbor has this setup on Juiced CCX (bought from me) and has been running it for 4 years now and is a very fast ex motox rider..fastest rider I know.
With the RH212/statorade at 52V 40A, the motor never overheats, The phaserunner when it goes into thermal rollback just reduces power to the same 1500W as the GMAC setup, it seems to do this indefinately.
IMHO, the All-Axle/Statorade/Phaserunner seems like really good compromise. The power limits of the motor seem in line with the phaserunner (both are good for 1500W+ for limited time, rolling back to 1500w) and 5# less than the RH212 (1# more than GMAC). Hopefully this setup will work for me one day
