My 1/8 8ight brushless and 1/8 CRT brushless :D

i ran the CRT today, lost the RC-M 13T pinion lol so i used a 12T pinion
on 4s it was very boring but good temps
on 5s it was quick and very torquey motor ended up about 170-175 how the hell do i get the temps down i would have thought 12/62 was very low gearing
esc ended on about 145 and the enrland 6K 5s lipo at about 125-130 (is that too high)
basically i am not too worried about speed i just want the setup to last because i think the temps are too high... i was going to run 5s in the truggy (about to order 2 5s packs) and in the losi i was going to use 4s (again i am just about to order 2 zippy packs)
so what gearing do you guys suggest? should the lipo be that hot?
also at the end of the run when i go to balance the pack 3 of the cells are at ~ 3.46V whereas 1 is at ~3.7V and one is at ~3.20V why are the voltages so different?