oh, see i knew i was missing something. i don't have a amp rating for my motor. i do have from manufacture 3528 watts and can take upto 36 volts. what i did for the formula was take the 3528/21 volts(i'm running) which gave me 168 amps. the motor is 1700kv. i then put that in the formula you provided to get 133 in/oz of torque. thats with a fresh charge. my nominal voltage is 19.8 which at 3528watts or 178 amps. that gives me 141.78 in/oz torque.

where i was lost, looking at the same motor 3528watts ran at 36volts would require 98 amps. that gives 78.11. i don't know exactly how much my system is putting out because i have gotten an eagletree data loger yet. but i run through 4600mah of a123 cells pretty quick.

i know this is all on paper and everything is different in real world. i guess i'm confused with the part where you said (if you keep the gearing the same, the more volts, the more amps you draw.) i always thought i motor can produce x power. ie watts. so if it takes 100amps at 10 volts to produce x, then it should only take 50amps at 20 volts to produce x. what i'm saying is electric motors are only able to produce a certain amount of power right? or does this number just go up until it tears itself apart?