Kieth said the prototype turned a 24X8 at 6500 rpm on a stock muffler, so it is definitely a powerhouse!
I had the EF Yak, and I couldn't get it to balance properly with a DA 50. I had the batteries literally hanging 1" off the front of the firewall and I was still around 5/8" behind the ideal CG. I don't see how this engine will work on it, unless, maybe you move the elevators up to the front of the fuse. I believe Dick hanson did this without incident, so maybe you otta shoot him a message...