Message-ID: <19990714050608.19710.rocketmail@web601.yahoomail.com>
Date: Tue, 13 Jul 1999 22:06:08 -0700 (PDT)
From: Denis Conkey <dconkey@yahoo.com>
Subject: Fuel Flow on Don George IO-320
To: lancair.list@olsusa.com
Mime-Version: 1.0

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>I have a few hours on my LNC2 now.  The engine is a
Don George overhaul, IO-320 with 9:1 compression.  It
seems to be running rich.  (It runs rougher and has a
higher mag drop at full rich, 80 feet ASL.)  Can
anyone with a similar engine tell me what your fuel
flow is, both full rich and leaned for cruise, at a
range of pressure altitudes at, say, 24 squared, or
something
obtainable at higher altitudes?

Bob
N4YH<

Bob,
Our Lancair 235 has a Don George IO-320, same 9.0
pistons, the cylinders have been ported and flowed,
and one electronic ignition.  The fuel injection
system is by Air Flow Performance.  At first we were
running lean, buring around 13.5-13.8 gph on takeoff. 
With a new fuel injection jet we are now getting about
14.5 gph on takeoff, which seems to be more normal
from what I've discovered.  The fuel flow at altitude
is about 9.5 gph at 8.5K and 8.2 gph at 10.5K density
altitudes.  Obviously this is very dependent on your
leaning technique.  I run about 75 to 100 degrees rich
of lean.  May burn a bit more fuel, but get a bit more
power and seems to run very well there without fouling
the plugs.  We have about 170 hours on the engine now.
 Hope this helps.
Denis Conkey
N235WC

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