David Megginson wrote in
:

That's interesting information -- I've often wondered why car engines
don't run LOP to cut down CO emissions. Why would the EGTs be higher
LOP than ROP, though?

Actually, I believe most modern automobiles with electronic ignitions run
substantially LOP in cruise. And the EGT's may well be cooler than when
ROP - that's just a question of *how* LOP they are running.

Slightly different issue: Catalytic converters and exhaust gas sensors
potentially could have their place in piston aircraft (I am *not* making a
pitch for the converters, but the exhaust gas sensor would provide very
useful information). Unfortunately, the life of either, in the presence of
unleaded gas being used, is essentially zero. {:(

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James M. Knox
TriSoft ph 512-385-0316
1109-A Shady Lane fax 512-366-4331
Austin, Tx 78721
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