From: Sky2high@aol.com
Message-ID: <14d.880e1f6.2993f838@aol.com>
Date: Thu, 7 Feb 2002 10:33:12 EST
Subject: Re: Engine dynamics - fuel injector air flow
To: lancair.list@olsusa.com
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Reply-To: lancair.list@olsusa.com

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
George,

Thanks for the confirmation of our observation.  I have no doubt that the 
induction system used in my engine, an I/O 320 with the forward mounted 
throttle body, is incapable of delivering air equally to each of the four 
cylinders.  

I am considering shrouds for the injectors but first I will be experimenting 
with managing the injector environment with bits of baffling along with 
adjustments to the cooling airflow the better even the CHTs -- all assuming 
that EGT and CHT data collected from my VM EPI 800 system is accurate -- and 
remembering that the cyl #1 CHT probe had to be bent to fit along side the 
exhaust pipe with a SS shield to keep it (the probe) from cooking.

Also, Lancair 320/360s do have a prop extension (I use a Hartzell compact CS 
prop) and I have modified the cooling air intakes with interior 
increasing-diameter trumpet horn like surfaces to slow down the air.  These 
work as I have pretty good cooling efficiency, but the un-impeded airflow to 
the #2 injector was quite direct and is significant.

Before collecting data for possible future Gami-injector use, I would want to 
make sure I have controlled as many variables as I can.  The reason for my 
recent examination of the engine running parameters is my use of the Lasar 
electronic ignition that changed the way fuel and air are converted to power 
(heat).  Since more combustion occurs in the cylinder and less burn in the 
exhaust pipe I am seeing the forecast 80-100 degree reduction in EGTs and a 
20 degree rise in CHTs.  Because of the rise in CHTs, I am more interested in 
equalizing the power (heat) produced by each cylinder to more effectively 
lean and reach engine Nirvana - Best Power, Smooth (4-cyl oxymoron), Cool 
Running and also beat the flaps off less tuned Lancairs carrying around 360s.

Scott Krueger

PS - Grease, pay attention.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://members.olsusa.com/mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair
Please remember that purchases from the Builders' Bookstore
assist with the management of the LML.

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