In a message dated 7/25/2006 12:45:16 P.M. Eastern Daylight Time,
ALVentures@cox.net writes:
Lynn;
I understand that
we can abuse the oil a bit, and out-of-control coolant temp is a disaster.
The question this raises is the oil temp limit not being the oil, but
the risk to the side seals of oil temps over about 220F for more than very
short period.
Early oil scraper seal failure is the long term
problem. In the short term, oil in the wedge on the bearing face is at a much
higher temperature than what the oil temp gage is reporting.
So rotor bearing failure is closer. Also the oil is
indicative of rotor face temperatures and in a turbo installation that means
running closer to detonation charge temperatures. Our engine builder (Daryl
Drummond) advises that oil temps above 160 degrees are cutting into engine power. But in a NA engine detonation is
not as big a problem.
Lynn E.
Hanover