---------------------------------------------------------- LycomingEngines-List Digest Archive --- Total Messages Posted Wed 03/11/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:51 PM - Re: Converting IO-360 to O-360 (r falstad) ________________________________ Message 1 _____________________________________ Time: 06:51:44 PM PST US From: "r falstad" Subject: LycomingEngines-List: Re: Converting IO-360 to O-360 For what it is worth, the GlaStar kit I bought partially completed came with an engine that started out as a Lyc IO-360-A1A and was converted by an overhaul shop to an O-360-"A1A". Because of the conversion, it is no longer a type certified engine and can only be used in experimental airplanes. In addition to swapping out the fuel injection for a carburetor, it appears that they changed out higher compression pistons, which if memory serves are domed and produce about 8.7:1 compression to flat-topped pistons that provide 8.5:1 compression. Why do it? Two reasons: the original owner was an older gentleman who wasn't familiar with fuel injection/was more comfortable with carbs and, more importantly, "bumps" would have had to be added to the cowling to provide sufficient clearance for the fuel injector tubes -- a lot of fiberglass work. The engine was originally built in the mid-1960's and the log books are incomplete. But it has run strongly for the past ~170 hours. My best guess is that it puts out about 180 HP, which is plenty of power for my plane. Best regards, Bob ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message lycomingengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/LycomingEngines-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/lycomingengines-list Browse Digests http://www.matronics.com/digest/lycomingengines-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.