Hmmm,

280 celsius or fahrenheit? If fahrenheit, I thought that was pretty much frying your engine?

I run my TRX 2.5R engine around 220 (per specs) and it runs great. I understand that TRX engines run hotter than other engines, and that the OS engine should be around 160-180?

I'm working on a OS-CV .15 that hit 280 and was smoking. Not "fast" smoking, but smoking from the head. Still trying to work that one out.