[jhautz]

Yes!!! A BEC will help ALOT.

Also, what gearing are you running. If the BEC doesnt keep you going, you might need to drop a your gearing a bit to help keep the controller temps down. The 7xl is a hot motor and even on 12 cell NiMH will draw some power and heat things up pretty good. If you are looking for a racing motor with longer run times before heating up I would go with something a little lower on the kv. Maybe a 8 or 9XL would be a better chioce.