---------------------------------------------------------- LycomingEngines-List Digest Archive --- Total Messages Posted Wed 05/09/12: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:27 AM - Re: Odd running cylinder - cured! (Ralph E. Capen) ________________________________ Message 1 _____________________________________ Time: 04:27:43 AM PST US From: "Ralph E. Capen" Subject: Re: LycomingEngines-List: Odd running cylinder - cured! Good scoop - thanks! -----Original Message----- >From: James Quinn >Sent: May 8, 2012 5:47 PM >To: lycomingengines-list@matronics.com >Subject: Re: LycomingEngines-List: Odd running cylinder - cured! > >Ralph - be mindful of the proper torque values for the injector bodies, it >is easy to over tighten and distort the shape, also injector bodies should >be installed and torqued with a light coat of engine oil on the threads. > >On Tue, May 8, 2012 at 4:24 PM, Ralph E. Capen wrote: > >> recapen@earthlink.net> >> >> >> Scratches on the top of the nozzle where the restrictor sits. In fact the >> entire top looked kinda mangled. >> >> White cloth came out clean..... >> >> -----Original Message----- >> >From: "Ralph E. Capen" >> >Sent: May 1, 2012 10:48 AM >> >To: lycomingengines-list@matronics.com >> >Subject: Re: [lycoming] Re: LycomingEngines-List: Odd running cylinder - >> cured! >> > >> >I'll do the white cloth - just in case anything falls out. I'm betting >> on the scratches personally - I had taken it apart and cleaned the >> restrictor and line earlier in my search - didn't remove the injector body >> though. >> > >> >Haven't heard about lead deposits in primer lines - my injectors now >> balance to within .1gph when I go Lean-of-Peak - so I'm inclined to dismiss >> that as a possibility...especially with only 160 TTSN. If I need to take >> them apart again, I'll remember the Hoppe's #9...Thanks! >> > >> > >> >-----Original Message----- >> >>From: FLYaDIVE >> >>Sent: May 1, 2012 10:35 AM >> >>To: lycomingengines-list@matronics.com >> >>Subject: Re: [lycoming] Re: LycomingEngines-List: Odd running cylinder - >> cured! >> >> >> >>Ralph: >> >> >> >>If you would, do the disassembly over a clean white cloth. I'm betting >> on >> >>something like dirt <-- Which will be difficult to find. Or a >> scratch/nick >> >>in the injector nozzle to seat area. >> >> >> >>Are you familiar with the problem of lead fuel deposits in primer lines? >> >> I'm wondering if that might be happening in the injector? The cure for >> >>this is to soak the parts in HOPPE"S Gun Cleaning Solvent #9. >> >> >> >>Good Luck, >> >> >> >>Barry >> >> >> >> >> >>On Tue, May 1, 2012 at 10:14 AM, Ralph E. Capen > >wrote: >> >> >> >>> recapen@earthlink.net> >> >>> >> >>> Disassembly and evaluation is on my list of things to do next..... >> >>> The injector and restrictor are sitting on my workbench waiting for me >> to >> >>> inspect them.... >> >>> My prioirites at the time were focused on the fix and the subsequent >> test >> >>> flight to determine results - but I didn't throw the parts away when I >> got >> >>> back either. >> >>> I'll post the inspection results shortly. >> >>> >> >>> >> >>> >> >>> Great question! >> >>> >> >>> >> >>> >-----Original Message----- >> >>> >From: FLYaDIVE >> >>> >Sent: May 1, 2012 9:48 AM >> >>> >To: lycomingengines-list@matronics.com >> >>> >Subject: Re: LycomingEngines-List: Odd running cylinder - cured! >> >>> > >> >>> >Very Good Ralph: >> >>> > >> >>> >Have you taken apart the injector to find out what the cause is? >> >>> > >> >>> >I have this affliction about Pull & Replace Mechanics - I want to know >> >>> what caused the failure. Sort of like: Why did the fuse pop? Just >> >>> replacing it does not work for me. Let us know if you can. >> >>> > >> >>> >Barry >> >>> > >> >>> > >> >>> > >> >>> >On Tue, May 1, 2012 at 9:30 AM, Ralph E. Capen > > >> >>> wrote: >> >>> recapen@earthlink.net> >> >>> > >> >>> >Folks, >> >>> > >> >>> >I have been chasing down an odd running cylinder for quite a while >> now. >> >>> > >> >>> >As a reminder, RV6A, IO360B1F6 w/9.2:1 compression LASAR ignition, and >> >>> SamJames cowl/plenum. The #1 would go lean during high power >> operations >> >>> with both EGT and CHT spiking. >> >>> > >> >>> >During my most recent continued airworthiness inspections, I decided >> to >> >>> remove, clean and replace the #1 injector body - making sure it was >> clocked >> >>> according to the instructions. >> >>> > >> >>> >This made the issue worse as it was now running lean during the entire >> >>> flight period. >> >>> > >> >>> >Removing and reclocking the injector made it better but wouldn't >> allow me >> >>> to fix it. >> >>> > >> >>> >After many e-mail exchanges with Airflow Performance, lots of graph >> >>> viewing, consulting experts, and general headscratching; I swapped the >> #1 >> >>> and #2 injector bodies along with their internal restrictors. >> >>> > >> >>> >Problem moved to the #2 position. >> >>> > >> >>> >Purchased and installed a new injector body to replace the #2 unit. >> >>> > >> >>> >Now I have no more peaks - after four flights, all cylinders track >> very >> >>> close to each other. >> >>> > >> >>> >I will still be performing one more test to check the system at >> different >> >>> altitudes. This test, suggested by the folks at Airflow Performance >> will >> >>> show if I should install turbo venting rails to compensate for the >> plenum >> >>> intake design. >> >>> > >> >>> >An item important to note is that I would probably not have noticed >> >>> anything wrong if I wasn't reviewing my data from each flight >> graphically. >> >>> The data captured by my AFS3400EE - converted to graphs with some >> software >> >>> jointly produced with Mike Behnke allows for a detailed review of all >> kinds >> >>> of information. Bottom line, if you have this data available - review >> >>> it...if you don't understand what you're looking at - ask for help >> >>> interpreting it. The Lycoming engine design is antique - but still >> >>> works...our addition of technology allows for systematic diagnostics >> and >> >>> improvements to keep it running. >> >>> > >> >>> >Ralph >> >>> > >> >>> > >> >>> > >> >>> >========== >> >>> >nes-List" target="_blank"> >> >>> http://www.matronics.com/Navigator?LycomingEngines-List >> >>> >========== >> >>> >http://forums.matronics.com >> >>> >========== >> >>> >le, List Admin. >> >>> >="_blank">http://www.matronics.com/contribution >> >>> >========== >> >>> > >> >>> > >> >>> > >> >>> > >> >>> > >> >>> > >> >>> >__._,_.___ >> >>> > Reply to sender | Reply to group | >> >>> Reply via web post | Start a New Topic >> >>> >Messages in this topic (1) >> >>> >Recent Activity: >> >>> > >> >>> >* New Members2 >> >>> > >> >>> >Visit Your Group >> >>> >[Yahoo! Groups] >> >>> >Switch to: Text-Only, Daily Digest Unsubscribe Terms of Use >> >>> >. >> >>> > >> >>> >__,_._,___ >> >>> >> >>> >> >>> >> >>> >> >>> >> >>=========== >> >>=========== >> >>=========== >> >>=========== >> >>> >> >>> >> >>> >> >>> >> > >> > >> >> >> >> >> >=========== >=========== >=========== >=========== >> >> >> >> ------------------------------------------------------------------------------------- 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.