You're uh... doing a lot of unnecessary calculations.
Use TQ 13ga wire for the motor and 12ga to the battery. The wires you use isn't going to miraculously increase the power delivery of a motor, at least nothing that's even noticeable. You're better off just using the time to throw down more laps rather than nitpicking with voltages and watts.
Also, I think the word is empirical.
Xray | Airtronics | R1Wurks LiPo | Hobbywing