I had occasion several years ago to drive a White Freightliner from L.A. to
Las Vegas with a professional driver.

He Instructed me to keep the pyrometer (EGT) below 1.400 degrees which is
about what we see with a Lycoming.  At night the exhaust stack glows red and
has a tail of blue fire about 12" long on a hard pull with 40,000 lbs. load
turning the Cummings at 2,100 rpm.

As Paul said.  They want 500,000 miles on these engines between overhauls.

Hank

When I was a kid I skipped school at 15 and hitch hiked across the country.
(Late 1940's)
A truck driver picked me up in Texas and taught me to drive a White semi. I helped
drive out to CA and back to Texas. In those days we did not have EGT's 
or freeways for that matter :-)

Paul Lamar
 
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