"Matt Whiting" wrote in message
...
Jay Honeck wrote:

All in all, a very pleasant experience, and a real pleasure to work with
a guy that's so knowledgeable. In answer to questions, Steve went on at
great length about the metallurgy behind the work, and the reasons
exhaust systems fail. (Incidentally, he said that the best thing that
EVER happened to their business was everyone running "lean of peak" and
driving their EGTs up above 1500 degrees. As temperatures approach 1600
degrees, the metal simply starts to fail, and you end up saving pennies
on gas, and blowing dollars on exhaust systems.)

That's funny as this isn't supported by the data the GAMI folks have
taken. It shows the EGTs being pretty much symmetrical about the peak. So
if you go lean of peak far enough you should be able to pretty much equal
the temps seen on the rich side of peak. And CHTs are actually lower on
the lean side so you should be saving your cylinder heads some grief.

http://www.gami.com/frames.htm

Now if folks are running "at peak", then I see Steve's point, however,
"lean of peak" doesn't have to be problem if done properly.

Here's the summary:

http://www.avweb.com/news/columns/182084-1.html or, I you prefer, here's the
Printer Friendly version:

http://www.avweb.com/cgi-bin/udt/im....ry.id=1820 84

Read the graphs and charts.


--
Matt
---------------------
Matthew W. Barrow
Site-Fill Homes, LLC.
Montrose, CO