The motor will max out and draw its peak current and shaft torque (Nm) and then that’s it. Meaning, the SSS motor did not have enough torque to get the 80mm turning up to speed on 6S, and would not have any more power even if we used 12S. Volts regulate the RPMs mainly, not motor torque.
Typically a lower KV motor of the same diameter will weigh more because the windings are thinner, thus you can coil in more copper, and the more copper you have, the more torque you get. Which is why your 360KV will work slightly better than the SSS 500kv we used.
Yes, you can buy our VeFoil motors. We designed our motor to fit into 2.25" (57.15mm) aluminum tube, its 1+mm larger diameter and longer allowing two main things, a lot more torque, and much better thermal cooling with aluminum tube.
They are built for maximum power and to last in water with Stainless Steel motor case bolts, SS grub shell screws, and high-speed ceramic bearings for low heat, no maintenance, and rust free operation.
Once we finish testing the motor in a few weeks we can do custom KV to fit your needs, and the best part is we can get a motor built and delivered in about 20 days