---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Sat 06/09/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:47 PM - Re: compression values (R.C.Harrison) ________________________________ Message 1 _____________________________________ Time: 03:47:56 PM PST US From: "R.C.Harrison" Subject: RE: JabiruEngine-List: compression values Hi! Martin 25% down on the leak down test is maximum permissible on any cylinder.. Otherwise IMHO the Compression test is barely worth the bother. Regards Bob H Robt.C.Harrison -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of avidflyer01 Sent: 08 June 2007 23:28 Subject: JabiruEngine-List: compression values hi folks, I would like to find out what are typical compression values on a recent 2200; could those who measured their compressions give me their results, together with approx engine hours and age? as I have a problem with a leaky valve in one cylinder I carried out some serious tests on my engine and found that on the three "good" cylinders I have only 122psi (8.6 bar). I've heard about one engine that at 300hrs had as much as 160psi (11.2bar), yet I also heard that my 122psi is a reasonable compression. My compressions were taken with a warm engine, one sparkplug per cylinder removed, throttle fully open, good battery. Engine has 100 hrs, 2 years old (hyd lifters). I also did a leak down test: pressure drop on good cylinders were 9%, 11% and 14%; it was 35% on the bad one. thanksfor your help Martin Avid Flyer / Jab powered Read this topic online here: http://forums.matronics.com/viewtopic.php?p=117380#117380 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-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/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-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.