RE: Extra 330L-EP Extreme 3D RC Acrobatic Plane ARF
You are NOT going to be able to get that kind of power out of 11.1v.
This plane is far too big for 11.1v packs.
A 3lb plane is about the limit for that....
The minimum voltage will be 14.8v.
You could opt for a lower KV rating on a motor and wire up your 11.1v packs in series to get 22.2v out of them. But this will require flying with at least two packs and each should be of 2850mAh or better.
Re: ESC
You need to establish what the power demands will be first.