Just as a point of information -- turbocharged diesel engines have far cooler
exhaust temperature than gasoline engines. As an engineer, I think it is
always important to try to understand the physical, economic, and regulatory
constraints to which the original design was seeking to conform prior to
making changes with little ability to perform adequate testing and analysis.

Jon Lauter
Rotary Power Marine Corporation

Well said, Jon.

Bill Freeman

True guys but they are also expected to go 500,000 miles in heavy duty service.
Somebody somewhere is making sodium cooled valves for automotive use.
I'll bet they are identical, other than the paper work, to the Lycoming valves.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org