[Patrick]

I wouldn't give up on the setup yet. Just change your LVC to about 3.2v per cell +or- .1v. Maybe go down to a 14t pinion or change to the losi 47 or 48t spur, and probably put the the tekin motor in. Your motor rpm is a little low, but it's still high enough to work well. Your packs have the same watt hours and watt output as a 4s 4800mah pack, so there's no reason they shouldn't work when geared for the same speed as the 4s setup. About 12 mins race runtime is about the most I would expect from them though. Once you've tried that stuff (especially the LVC) then decide about the setup.