No need for luck. I know there are differences between and aircraft engine and a helicopter engine. However, they are fundamentally the same. The new firewall forward might have communication issues as they did a centralube cam for me and were difficult to contact. I figured they were in the back working. In this day and age who can always afford someone to answer their phone. They are still providing a service that otherwise would be unavailable. What ever shortcomings they might have I believe is overcome by the service they provide, and I'm not talking about bedside manner. I'm talking about giving us better STCs. Lycon runs hi comp pistons in there race motors with no or very little issue be it heat related. Lycon told me as long as I didnt use chrome cylinders Id be ok. They related a story to me about a guy who ran 10:1 pistons in an M20E A1A. There was someone at the fisdo that was going to field approve it for him. He had great success with them, he just bought a K before he got around to gerting it approved and put it back to stock. The moral of the story is if you want Hi Compression pistons in your Mooney there is a option and it works if done right.
I wonder what a io360 would do with a roller cam, port flowed jugs, hi comp pistons and a powerflow? All STCs available to use certified aircraft owners. I believe that would blow the io390 out if the water for the dollar spent. Perhaps 240 hp in a four banger, could you imagine a certified M20J with that without all the weight of a Continental. We have the octane at the moment, I believe we should use it.