Feigao 8XL + 9920 + 6S (a123 cells 19.8V)

[MetalMan]

Mamba Max and Feigao 540C 7XL. I believe that "insane" is in the eyes of the beholder. It's definitely enough to at least keep up with the nitros (that use a 2-speed), but it doesn't wheelie much (it does occasionally) because of the center diff.

I went with 5s2p (3s2p + 2s2p) because there are 10 cells in the Dewalt 36v power tool battery packs. On Ebay you can get these packs for ~$100, and then they are broken down to harvest the cells, and a new pack can be made. I'm guessing Maxamps would charge at least $250 for 3s2p + 2s2p.