---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Mon 12/26/11: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:04 PM - Re: Spark Plugs - Fine Wire Safety Warning (Brock Windsor) ________________________________ Message 1 _____________________________________ Time: 08:04:19 PM PST US From: Brock Windsor Subject: Re: TeamGrumman-List: Spark Plugs - Fine Wire Safety Warning io-550. ------------------------------ On Sat, Dec 24, 2011 11:42 AM CST Gary Vogt wrote: >what engine is in the SR-22? > >I think the change to RHB29E is a guess. Plug runs cooler. I don't think they know the failure mode. > >If the SR-22 has angle valves, well, it's an entirely different animal. > > >________________________________ > From: 923te <923te@att.net> >To: teamgrumman-list@matronics.com >Sent: Saturday, December 24, 2011 8:48 AM >Subject: TeamGrumman-List: Spark Plugs - Fine Wire Safety Warning > > > >I've been looking for reasons why my plane isn't as fast as it used to be. >Maybe I found something. > >I found a MSB concerning fine wire plug failures from Tornado Alley >turbo: >http://www.taturbo.com/TATSR22-SB11-05%20fine%20wire%20spark%20plugs%20initial%20release%20sept%2023%202011.pdf > >Beechtalk has a thread on this issue where they mention that NA or Normally >aspirated engines have the same failure with fine wire plugs. >http://www.beechtalk.com/forums/viewtopic.php?f=37&t=59668&hilit=fine+wire > >In addition, Tempests' new advertising campaign lists acceptable resistance >of spark plugs as : > >500 - 3000 ohms = New - Good >500 - 5000 ohms = Used - Good >>=5000 >ohms = No Good-Hard Starting-Misfire-Poor Combustion >ref.: http://www.electroair.net/pdf/SparkPlugCard.pdf > >So I pulled my Champion REM38S fine wires to look for broken >ceramicand measured resistance: >No broken ceramic but resistance was very high. > >Plug Resistance k-ohms > >Cyl >Top >Bottom Bottom >1 >29.8 >68.9 >Oily >2 No >Continuity >2.8 >Dry >3 >5.75.9Oily >412.933.7 >Oily > >Spare 19.16 Spare was removed becaused it kept fouling > >If Tempest resistance values apply to Champion plugs then all my plugs are >bad One plug had no continuity at all. Resistance measured while cold ~ 35 deg >F. >The engine used to bust right off, starting first blade. Last year or so of >flying it was hard to start and would misfire when loading up, ie when keeping >WOT and lowering RPM >all pointing to a possible igniton problem. > >New plugs going in. Hope to be flying again next week and we'll see how it >does with new plugs....and a straight======================= >===== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-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/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-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.