I have a tc3 with a mamba 4600 and either 2s or 4s maxamps 4000 lipo packs. 4s is wayyyy too much power for it though. Even when stuff doesnt break (which is rare), its undriveable in any normal sized parking lot. I have 30mm foams on the back, and it can easily break all four tires loose at 30+ mph. I have no idea how fast it will go completely wound out, but according to the speed calculator someone posted on this forum, its a little over 100.
I would consider it very fast on 2s lipo. 4s is just stupid.