Originally Posted by 1967brutus

Just a tip about the FT160 in general: Do NOT overrev it. The engine is rated for 9K but that number is pretty optimistic. Andrew White from JustEngines fame once advised me to make ABSOLUTELY sure to keep RPM below 8500 under any circumstances including flight. So prop it for around 7500~7700 (peaked) on the ground, and tune it 500 RPM rich to compensate for unloading. Is valid for the OS 160 twin just as well, since these engines basically share conrods.

Gassers handle a bit of lugging down WAY better than glow engines, in fact, they prefer it even, so that is not a problem at all..