2600 Kv rated motors? which one?

[lutach]

It handles 4S, if you look at that link it says 12 cells which equals to 14.4 and 4S is 14.8 volts. If you go with the 7XL make sure you get the best lipos you can find, because they will consume a lot of AMPs. The Mega will need less AMPs and will have more torque.

[lutach]

If you do want to stay with a motor that has a Kv of around 2800, the ACn22-30-1E will be the one for you. It has a Kv of 2850 and here is the specs: http://www.megamotorusa.com/Brushless/ACn22-30-1E.htm