The main question I was asking when I started this thread was regarding
mixing 100LL and Mogas. I already knew that 100LL or Mogas by themselves
wouldn't be a problem with my Chevy. It was the references to putting 100LL
in one tank and Mogas in the other tank that led me to ask if there was a
problem mixing the two. Alcohol should also not be a problem since I built
my engine along the lines of a racing engine that could probably use
Methanol (fuel found at race tracks) with minor mods to increase the
compression ratio. Of course, then I'd have to flush the tanks with each
use and change the oil a lot due to the nasty affect straight alcohol based
fuels have on metal. I'm not sure about top fuel (Nitromethane) which is a
little like methanol premixed with nitrous oxide but I wouldn't mind trying
it the next time I decide to enter my Super Rebel in the unlimited class at
the Reno Air Races. Maybe with a supercharger, nitrous injection, and top
fuel I might have a chance. Of course, I'll have to figure out how to deal
with a fuel burn of 3.5 liters per second and the fact that the wings will
depart the airframe in the first few seconds of flight. :-)
Mike
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
steve whitenect
Sent: Friday, December 17, 2004 8:43 AM
To: rebel-builders@dcsol.com
Subject: Re: Avgas and Mogas use
Mogas has been manufactured under many different guide lines and formulas.
I have been reading this thread with alot of interest and must relate my
little experience with the stuff. I rebuilt an 0-235-C1- new valves, rings
etc and flew the first 25 hours with 100ll as suggested by ECI in Texas to
get a good buildup of lead in the sump. Used auto fuel for the next 50 and
started to notice leaky exhaust valves. Recut the seats and replaced
exhaust valves and used a mixture of av/auto fuel for the next 400 hrs
without a problem. Fueled from a barrel adding 50 liters of avgas and
topping it off with regular auto gas. Gives the right amount of lead as
80/87 use to have. A buddy of mine had his 172 0-320 rebuilt or overhauled;
I believe it was from Leavens in Ontario. Used nothing but auto gas and had
to do a complete top end in 300 hrs. All the valves were burned. Unless
you are getting the newer, better quality products from Superior or
Lycoming, I'd be inclined to have some lead in there. There is just too
many of the older engines out there with the softer valves. My 2 cents worth
Steve W.
Rebel 637
From: Newcog@aol.com
Reply-To: <rebel-builders@dcsol.com>
To: rebel-builders@dcsol.com
Subject: Re: Avgas and Mogas use
Date: Fri, 17 Dec 2004 11:24:55 EST
I miss using mogas. Over a twenty year period I used about 8 thousand
gallons of mogas in my Cherokee with an 0-320. Mostly hand carried onto
the airport
in 5 gallon jugs with a savings of about a dollar a gallon.
In recent years only mogas containing up to 10% alcohol can be sold in gas
stations in the greater Chicago/Milwaukee area. This is because the area is
designated by the EPA as an air pollution "attainment area" and the alcohol
serves as an oxidizer and reduces tail pipe emissions. Few airports in
Illinois
and Wisconsin sell mogas which of course has to be alcohol free.
Mogas provided for better winter starts and clean spark plugs.
Norm Wandke, R200 still under construction.
-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login?mode=HTML
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login?mode=HTML
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
