David Leonard wrote:

 > Keith, sounds like you are running your engine too rich at cruise.

Tracy found he can lean to about 100 degrees lean of peak and the EGT

will drop down to 1450 degrees F or so. You should also benefit greatly

in terms of fuel flow and MPG. Not to mention lower stress on the

exhaust system. 321 SS is in a steep strength slide at 1700 degrees F.

Tracy feels the reason for the rotaries  ability to run lean is a

outgrowth of the rotating combustion that provides a radial stratified

charge.

Paul Lamar

Keith, I agree with Paul.  At economy cruise my EGT is around 1450-1500F.

Only when full throttle do I get up to 1650F.  My thermocouples are 8" from

my exhaust port.

Ed Anderson

RV-6A N494BW 185 Hours

David Leonard wrote:

Ed, don't forget that the Powersport's engine is putting out a few more horses - necessarily
creating more heat.  I would be very surprised if Keith and the Powersport crew never bothered to
properly tune and map their engine.

Lets face it, Powersport is doing a better job than most of us.  They make a first class
installation and its only the first class price that has kept many of us away.  Of course,
everyone does something different from the way `I' would do it.  In retrospect they see that they
would have done some things differently, but won't we all? I am very sorry to see this happen.
The negative publicity is unfortunate and undeserved.

Dave Leonard

Dave EGT's are the same regardless of the HP. If what you say were true
radial engines would melt exhaust valves in seconds.

IMHO they need more negative publicity not less :) Most stubborn, closed minded 
and not invented here people I can think of right at the moment:)

Paul Lamar
 
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