I'm kinda new to these things and all the different brands are gettin me confused. about a week ago i picked up a zipzap with all the fast and furious upgrades and thought it was pretty quick, then yesterday i picked up this Z-cars kit. out of the box its so slow its boring, but all i did was swap in the ZZ green motor and the z-car will keep up with the fastest ZZ. not to mention how screamin fast it is with the NOS motor and red gears. whats the deal, why is this thing so slow stock and so insanely fast with just a new motor, and why wont the zipzaps keep up?
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