hotbodies Ve8 pics

[cornolio]

i need some opinions on my situation:

i recently started running it hard on a small track(10th scale)
i started noticing that my packs only charged from 2500 to 2700mah.
i only get 14 mins with a 15 pinion,geared for 42mph
and 11mins with 1 a 13t pinion,geared for 37mph.the temps are fine
and is topping out at 135 on the motor but it is cooler with the 15 t pinion.
it starts cogging at the 11 and 14 min mark and just thought that it was the LVC.im just wondering why it wont use up all the charge on the batteries.very confused

set up:

novak HV maxx 6.5
4s trakpower 5400
4s peak racing 4800
AKA gridirons