More speed=more Volts, not sure how big of a pack(s) you could put in there but since the esc can only go to 6s, I'd say go there, or change gearing/motor.
E-revo MMM 2200 6s zippy 50MPH of pure fun and parts destroying powa!
Futaba 3pk more controller then anyone person needs
TC5 top speed drifter 21mph on crappacks and 40 on calc
Nahhh, I understand the whole speed, gearing, ect. The issue is there are alot of batteries on the market, Some going as high as 10000mah but only in 7.4, I know if i go 11.1V I'll get more top end out of it. But I know I dont want to go with 7.4V 5000mah which is what i have now. I seen that SMC has a 9000mah but its a 7.4V battery. So i guess with all the speed junkies out here. I can find another brand of battery with more go and throw.