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From: "Eric Parlow" <ericparlow@hotmail.com>
To: lancair.list@olsusa.com
Subject: Re: IO-360 on Autogas
Date: Fri, 27 Oct 2000 14:48:25 GMT
Message-ID: <F296Bhe6LJn0nafzNhM00000504@hotmail.com>
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Rob,

Q--This is the question I figured you would eventually answer, but 
Lycoming's IO-360-B has an 8.5:1 compression ratio, not 6.5:1.  Is 
Continental's different or was this just a typo?
A--This is not a typo.  All engines with a TC to run 80/87 have lower CR's.  
I will post a separate reply with all the Lyc and Continentals that have a 
TC to run 80/87 and their CR's.

Q--My real question is whether I can run a Lycoming IO-360-B on the new 
avgas (82 UL?) or on the present day unleaded
autogas.  Care to comment on the competition's product?
A--The Lyc. IO-360-B, 180 bhp @ 2700, is TC'ed to run 100/100LL only and has 
a CR of 8.5:1.

Q--On another topic, I notice a somewhat increased tendency for my 
Continental O-200 to pick up carburetor ice when running on autogas rather 
than avgas (80/87 or 100LL + Alcor TCP).  Is this something that y'all have 
observed,
A--It could be due to the poor quality of autogas.  Autogas also has a 
higher vapor pressure.

Q--The question here is whether we're likely to be more susceptible to carb 
ice when the new unleaded avgas comes on line.
A--Next generation engines will be fuel injected and icing due to fuel will 
not be an issue.

Q--By the way, I assume we don't need to get STC's to run experimental 
aircraft on autogas, do we?
A--It's Experimental!

ERic--

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