Lean burn engines

[Ray Drouillard]

I have heard that running an engine too lean will cause it to run hot, and
will burn out the valves.  I have never seen an explanation of this.  Why
does it happen.

Generally speaking, how lean can I run a standard (normally aspirated)
engine.  Specifically, (if it makes a difference), I want to improve the
mileage of my Jeep Wagoneer, which has an AMC 360 V-8.  It is fed with
Holley Pro-Jection, and is fired with a Jacobs Omni-Magnum ignition box.

What can be done to an engine to allow it to run leaner.  The engine is
currently at the rebuilder (though he hasn't started yet), so I might be
able to get stellite valves or something like that.


Ray Drouillard


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