mm/5700 TC3 questions. torque/gearing

[phildogg]

I have a question on motor torque/gearing in my TC3. Right now I'm running the mm/5700 on 2s geared 28/72(speed runs).I have ran 48mph on the 2s which Brians calc says is about right. My question is some of the gearing I see really high when doing speed runs(35/60) my question is how much does the torque of this particular motor increase when going up in voltage?(3s,4s) Where is the limit of gearing on 2s? could I gear 30/60 on 2s or does it need the extra volts/torque to pull that gearing? I might be over thinking this also.lmk what you guys think..