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1. 04:27 AM - Re: Odd running cylinder - cured! (Ralph E. Capen)
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| Subject: | Re: Odd running cylinder - cured! |
Good scoop - thanks!
-----Original Message-----
>From: James Quinn <jquinn3@gmail.com>
>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 <recapen@earthlink.net>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" <recapen@earthlink.net>
>> >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 <flyadive@gmail.com>
>> >>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 <recapen@earthlink.net
>> >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 <recapen@earthlink.net
>> >
>> >>> 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
>> >>> >==========
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>> >>> >==========
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>> >>> >="_blank">http://www.matronics.com/contribution
>> >>> >==========
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> >
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