I am going to try running a few more RPMS and a fan first and see what I get.

First thing to get is a 5s lipos pack and reduce the gearing.
I am concerned the 8XL will be the weak point with 5s lipos. Should we not be around the 9XL for 5s lipos??
Anyone race with a 8XL or 9XL?? What kind of gearing are you using?

I need to do (3) 5 min heats and (1) 10 min main. So I need to be able to double what I am getting out currently of the controller.