Mailing List lml@lancaironline.net Message #9187
From: <CHBAviation@aol.com>
Subject: Re: 345hp lycoming
Date: Wed, 20 Jun 2001 01:37:44 EDT
To: <lancair.list@olsusa.com>
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Flowbench - Flowbenching consists of placing a cylinder on a special fixture
and pump fluid through the intake with the valves set at 6 different
positions.  This represents the flow of air between each valve position.  You
then exhale it through the exhaust valve in 6 different positions to find out
the CFM of each position per cylinder.  Upon CFM info retrieval you are then
able to determine HP.  Adjusting up from here is welcome to either get the
cylineders to where the engine is rated to or pay approx $100 per port to go
down to 1% intake 3% exhaust.  Depending on the 4 cylinders, since it's a
match set, determines what the HP will be.  You flow to the lowest cylinder.  
The cylinder repair shop I work with is continually improving.  This is a
yellow tag procedure and he is one of the few in the country that I've found
who can do this modification.  The company is Aircraft Cylinder Repair, Owner
John,
303-659-7101, located in Brighton, CO, east of Denver.  Tell John that Chuck
sent ya!  I've had great results and have used this procedure on 4 of my
previous engines.  If interested I can post previous graphs showing the
airflow through six dif positions.

Venture Valve Guide - The guide and seat are a set unit, together they make
the venture effect.  You can obtain one from John.  

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Please send your photos and drawings to marvkaye@olsusa.com.
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