Which Batteries?

[suicideneil]

Big, big batteries.

15271D is a 2300kv motor- thats gonna pull a shit load of current I would have thought, so best with 6s2p of 6s3p of A123 cells, or 6s lipo and gear down rather alot- not the best motor choice for a big truck... (its ment to be low kv and high voltage, not high kv and high voltage)...

You would really have to use a pair of lipos in series to get 6s, no way a single 6s lipo would really work or fit terribly well. The TP 40C lipos seem like a great option, but anything 30c or more is gonna kick ass in the 5000mah range.