RE: HOw to make a Traxxas Summit faster for CHEAP???
Spray. It's the only thing to make anything faster for cheap.
Throw a 200 shot on that sucker and it'll run 9s.
In all seriousness, that 775 is kind of a terd...if you want it to go faster, the only real answer is a Tekin RX8/2250 or a Mamba Monster/2200 on LiPo.