ORIGINAL: Tired Old Man
Just a temp FYI. I've been doing some high temp run tests lately. So far I've managed to completely destroy an engine in 31 hours of run time, so temps are quite important. With a little work I think I'll be able to get that down to less than 10 hours. The intent is to destroy in order to determine how much for how long.
What temperatures were you running? I know 200°C is ouch! in two strokes. Four strokes do not seem to mind that much. In my MVVS test engine (on the test stand) I repeatedly keptWOT until the cylinder temp whent past 200. It resulted in a heavily pitted wrist pin, due to the very low oil viscosity at these temperatures. No piston damage was recorded. Rings and cylinder in good shape as well.