Well, this topic has pretty much been beat to death, but I might as well add my thoughts. The 3350 [Turbo and Straight] were nearly as good as the R-2800.....IF.....you took care of them and operated according to Wright's Specs. Some airlines in order to "compete" tried to operate them at higher power settings and consequently, the R-3350 got a bad name. I only flew the 3350 for six months [EAL Shuttle], but never shut one down. As everyone has said the R-2800 is perhaps the best of the 'big round' engines. Flew those [DC-6] for five years and only feathered ONE prop. Oil leak of some kind. Sure do miss the sounds of both the 2800s and the 3350s.