Originally Posted by DesertRat

If you are willing to part with a few more bucks for a LOT more ESC, the Hobbywing 2.1 is still available from a bunch of sellers on Ebay, Amazon, that sort of thing. It's no motor limit, comes with a flat and a finned changeable heat sink, fan, sensor cable, and other goodies. It's only downside is that though its low-profile, it has a big footprint, but its a great ESC for WGT because the cars have the space on the chassis to fit almost anything.

EDIT: I forgot to note that the HW 2.1 has a very good internal 1s to 6v booster, no need for a receiver pack or external booster.