---------------------------------------------------------- MurphyMoose-List Digest Archive --- Total Messages Posted Mon 08/20/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:12 PM - Re: M-14 AUTO FUEL (Cliff Coy) ________________________________ Message 1 _____________________________________ Time: 01:12:13 PM PST US From: Cliff Coy Subject: Re: MurphyMoose-List: M-14 AUTO FUEL It is possible to run the M-14P on Autofuel with some caveats. Remember the whole point of octane rating is to suppress detonation and pre-ignition. As compression rating increases, the risk of detonation and pre-ignition increases. Therefore in high compression engines or engines which increase the manifold pressure (supercharged and turbocharged engines) a higher octane rating is required. Motorstar (the current engine manufacturer) recommends an MON octane rating of no less than 91. Automotive gasoline is rated by the RON+MON/2 method. Aviation gasoline is rated by rich operating mixture/ lean operating mixture (ie. 100/130) Therefore I don't recommend using an automotive fuel of less than 94 octane. As stated previously, do not use auto fuel which contains alcohol..for a number reasons. Most notably, it will attack the seals and diaphragms in the fuel system. Finally, I would recommend that if autofuel is used, that it's mixed with Avgas because: 1) The Avgas will raise the octane rating. 2) Avgas is very stable and will not degrade like autofuel. Hope this helps! Cheers, Cliff Coy Gesoco Industries bob tripp wrote: > > > > Is it possible to run the M14 on auto fuel? I've heard rumors that it > is possible, but I can't find anything in print on it. If it is > possible, what modifications have to be made to the engine? > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message murphymoose-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/MurphyMoose-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/murphymoose-list Browse Digests http://www.matronics.com/digest/murphymoose-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.