Jim, Prior to flight, I used auto gas in my EFS-2 and even a couple of times during flight. I then upgraded to an EFS-3A and have only run 100LL in it. This is directly off Ellison's web site.
"Use with Auto Fuel The Ellison Throttle Body Injector has been designed specifically for aircraft use and has been thoroughly tested with aviation fuels. We do not recommend the use of auto fuel with the TBI. Several of our customers who have used auto fuel have had substantial damage to the rubber and metal parts of the TBI. When operated only on aviation fuel, we have never observed any deterioration of metal or rubber parts in the unit. The EPA has required the oil companies to add oxygenates to auto fuel in in many parts of the country to reduce pollution in the winter months. In most areas this additive is alcohol which will damage aircraft fuel systems. In addition to possible chemical incompatibility, the high vapor pressure of auto fuel can be a problem when used in aircraft, as it is much more likely to boil that aviation fuel. Unlike aviation fuel, the formula of auto fuel is altered as the seasons change, so winter grade fuel is even more likely to form vapor. Many of our customers have stated that they believe there is no chemical difference between aviation fuel and auto fuel. A dramatic difference can be demonstrated by pouring a sample of each into Styrofoam coffee cups. The aviation fuel will remain contained in the cup, but auto fuel will dissolve the cup and flow right through the bottom. " I know of a couple of guys who are running mogas with their Ellison with no ill effects YET. Notice I highlighted YET. It is a risk only you can convince yourself to take. You may never have problems but if you do, the only way to repair the Ellison is to send it in to the factory for repair and you will be stuck with a hefty repair bill. Personally, I am not chancing it with my Ellison. Mark Jones (N886MJ) Wales, WI Visit my web site: http://mywebpage.netscape.com/n886mj Email: flyk...@wi.rr.com -----Original Message----- From: krnet-bounces+flykr2s=wi.rr....@mylist.net [mailto:krnet-bounces+flykr2s=wi.rr....@mylist.net]On Behalf Of JIM VANCE Sent: Friday, August 19, 2005 1:51 PM To: krnet Subject: KR> Avgas/Mogas & Ellison The documentation that I received with my Ellison throttle body states that it is intended to use 100 LL only. I assume that this is specified at the behest of their attorney, but could be that the seals and diaphragm wouldn't tolerate the wide rank of stuff in car gas. Has anyone used car gas with the Ellison TBI? Have you had any adverse experiences? Since the compression ratio on my GP VW 1915 cc dictates that I used 90 octane, I would have to use gasohol here in Kansas. Would this be adverse in an Ellison? Jim Vance va...@claflinwildcats.com _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
