Interesting, thats one to turbo if any. Wonder if they would sell the parts?
It seems steep at 130%+ VE but 60 hp seems doable. The 912 is around 13cc I think. Each section would have its own camshaft?That's about the HP/displacement expected for modern water-cooled engines at 5500-6000 RPM. About 12-13cc/HP. Maybe if we just have a simple 2 valve cylinder it might be less.