I was wondering if anyone tested this 220 with higher nitro like 20/20 or even 30% heli fuel. I think this is how glow 4-strokes like Saito and YS can start showing their power advantage over 2-stroke or gasoline engines.
That would show how much money you need to spend and how large a tank you would need for a 12 minute aerobatic flight with a big four stroke. I would bet my 160 fx on 30% with a 2 or 3 head shims would still make more power and still use less fuel.
I think the 220 is a kool engine and would be perfect for someone that has to have a four stroke in a 160 size aircraft do to preference or muffler size restrictions.