Message-ID: <001d01c0cd13$a76d3a40$a0ca0041@mshome.net>
From: "Robert Smiley" <robsmiley@home.com>
To: <lancair.list@olsusa.com>
References: <3AE5D259.C4D70B21@progress.com>
Subject: Re: running lean of peak
Date: Tue, 24 Apr 2001 17:09:46 -0600
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Reply-To: lancair.list@olsusa.com

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Marcelo,

I don't know the answer to all your specific questions. I do know that he
had gami injectors and they were all clean. But just think for a moment;
Horsepower is produced by converting the chemical energy of the fuel  to
mechanical energy.  Increasing manifold pressure without a corresponding
increase in fuel to achieve the proper ratios might be like creating a
blowtorch inside the cylinders.  Also the fuel also acts as a coolant and
also a lubricant for the pistons, valves and cylinders.  When you swollow a
valve to me that means it is not receiving enough coolant from the fuel and
why are the  exhaust valves  the ones that usually break?  I think they
require some lubricating and cooling on the stems from unburned fuel
escaping out the exhaust.

When running hopped up high rpm model airplane motors in speed events you
leaned out the engine for maximum rpm then you richened it on the ground.
When it got into the air it picked up more air.  If you didn't compensate
for it on the ground you ended up with a blob of aluminum on the end of the
con rod and a nice smear of aluminum on the cylinder walls and a stuck
engine that usually was red hot before it quit.  It was very disconcerting
to see your controline speed rig on your tether slowing down, laboring and
converting chemical energy into a melting blob and nothing you could do
about it. I would be hesitant to trusting guages going on the lean side of
peak  if it means the difference between a useable powerplant or your life
and a bucket of pot metal.


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