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Date: Tue, 05 Feb 2002 18:27:21 -0500
To: lancair.list@olsusa.com
From: Paul Kapcin <pkapcin@olsusa.com>
Subject: Re: Engine dynamics
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REPOSTED for: Sky2high@aol.com

In a message dated 2/5/2002 4:41:38 AM Central Standard Time,
macpacheco@earthlink.net writes:
If you have proper (even) fuel and air distribution to all cylinders, then 
there should be no problems from running the engine 50 or more degrees lean 
of  peak.......Marcelo
<SNIP>

If the problem with Lyc I/O 320/360s is uneven fuel distribution and one of 
the ways to fix that is to match the fuel flow to the available air then, 
before jumping to Gami injectors, one should try to understand why the fuel
flow is uneven.  As we have found, there us an affect from the air flow and 
pressure at the injector body itself.  Current in flight tests shows this 
to be especially true at cylinder 2.  By simply blocking the direct high-speed
air to the number 2 injector, that cylinder is no longer the first to 
peak  nor to run 200-300 EGT degrees leaner than the others.  One of the 
reasons  that GAMI wants actual measurements from your operating engine may 
be to take into account these environmental differences and size the 
orifice to compensate for them.  Before switching injectors, I want to 
normalize the conditions of my current ones and see the results.  There is 
much work to do, but others could try this simple modification if they also 
have problems in  getting equal work from all four cylinders.....  Scott 
Krueger...N92EX

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