Chris-Use Purple fronts and Pink rears on outdoor asphalt. I'll defer your gearing question to someone else as I have not run a brushed motor in my pan yet.
Thunder Power 2s1p
I have this new 3800mA-h pack in hand. The first cycle was a little lower than specs so I cycled it again on the balancing Charger to make sure it was good and full. Cutoff Voltage was 6.0 V.
Thunder power (Enderland, Korea) 7.18 V 3950 mA-h
AmpMax
I cycled the Amp Max 4000 mA-h Pack that I had up to 160F on discharge.
AmpMax 7.14 V 3905 mA-h after 25 cycles and one hot cycle. This is like new specs
.
My second recent ampMax pack with 25 cycles has dropped to less than 66% of capacity after 25 cycles in less than a month. I have returned this pack.
This is the typical new AmpMax 4000 mA-h pack.
AmpMax Pack B 735 seconds at 20 Amps, 4083 mA-h, 7.19 V average
Orion
Orion 3200 mA-h 2S1p Avionics LiPo when new (Kokam, Japan)
20A discharge, 574 seconds, 3194 mA-h, 6.87 V average
The guts of this pack are identical to the graphite edition 3200 mA-h pack. I sold this pack as it was slow in the car as well as in the discharge test. I have data to show that these packs last longer than other brands, but do show a lower average voltage in the beginning.
Apogee
Apogee Magnum 3800 Lithium Manganese LiPo
Average voltage at 20A discharge over a full 3838 mA-h = 7.20 Volts
. This is only very slightly under the Scorpion which average 7.25 V after I shortened the leads.
Pack C 20 Amp discharge, 6.94 V average
, 3744 mA-h tested when new. Pack A and B tested better when new but deteriorated to about this voltage fairly rapidly with only a few months of age and use
. The capacity deteriorated to about 3100 mA-h at present after a few months of hard use.
Scorpion
Scorpion Lithium Cobalt Dioxide Pack 3200 mA-h (Kokam Japan
20 A discharge, 612s, 3400 mA-h, 7.19 V
This pack maintained voltage and capacity extremely well with use and time. I was not doing 35 amp discharge rates with this pack, however, but I did run some mod touring car with it about half the time.
Discharge Temperatures
Amp Max at 20A, 122F, (after 25 cycles)
Thunderpower at 20A, 105F
I decided to start keeping these temperature records as they may be the limiting factor with the hottest brushless motors.