The bottom line is that you're asking the plane to do something it's not designed to do. Burning holes in the sky is what Ugly Sticks are made for. The good news is that you have a trainer that you're used to. Learn loops, barrel rolls, stall turns, Immelmans, and cuban 8's with it, using the extra horsepower to pull your up lines. When you get your first sport plane, you'll be amazed at the speed range once you get it set up right.