---------------------------------------------------------- LycomingEngines-List Digest Archive --- Total Messages Posted Tue 11/24/09: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:11 AM - Just A Few More Days To Make Your List Contribution... (Matt Dralle) 1. 05:19 AM - Re: CHT update (Ralph E. Capen) 2. 09:35 AM - Re: CHT update (Deems Herring) 3. 09:52 AM - Re: CHT update (Ralph E. Capen) ________________________________ Message 0 _____________________________________ Time: 12:11:41 AM PST US From: Matt Dralle Subject: LycomingEngines-List: Just A Few More Days To Make Your List Contribution... There is less than a week left in this year's List Fund Raiser and only a few short days to grab one of the great Contribution Gifts available this year. Support is still significantly lagging behind last year at this point but hopefully it will pick up here towards the end. Please remember that it is solely the Contributions of List members that keeps the Lists up and running as there is no commercialism or advertising on the Matronics Lists and Forums. The List Contribution web site is secure, fast, and easy and you can use a credit card, Paypal, or a personal check: http://www.matronics.com/contribution I want to thank everyone that has already made a generous contribution to support the Lists! Thank you! Matt Dralle Matronics EMail List and Forum Administrator ________________________________ Message 1 _____________________________________ Time: 05:19:11 AM PST US From: "Ralph E. Capen" Subject: RE: LycomingEngines-List: CHT update Thanks Deems, I haven't touched the underside baffling from Vans stock configuration. Good methodology suggestion! Based on a number of responses - I think I'll probably leave it alone for a while and see how it runs. Ralph -----Original Message----- >From: Deems Herring >Sent: Nov 23, 2009 9:05 PM >To: lycomingengines-list@matronics.com >Subject: RE: LycomingEngines-List: CHT update > > >The accuracy of the readings is a different question but the relative flow on each side should be controlled by the length of the baffle below and between the cylinders. increase the length of the baffle for the cold cylinders or or shorten the ones for the hot cylinders to change the balance. Remove the same amount from both ends of baffle if you don't want to change the balance between 1/3 or 2/4. I wouldn't have a pm with calling what you have close enough. > > > >Deems > > > >Here's the setup: >IO360B1F6 >9.2:1 pistons >AFP Fuel Injection >LASAR Ignition with CHT sender relocated to allow for testing >Vetterman Dual Crossover Heater/Mufflers >SamJames cowl and plenum >Advanced Flight Systems 3400 Engine Monitor > >Oil Cooler mounted behind #4 cylinder >Air for both Heater/Mufflers behind #3 cylinder > >For constant power setting, here's the consistency that I have achieved: >#1 and #3 cylinders run within three degrees (avg) of each other >#2 and #4 cylinders run within three degrees (avg) of each other >The #1/#3 cylinders run 8.5 degrees hotter (avg) than the #2/#4 cylinders > >With the members of the sets of cylinders running this close each other, I'm thinking that I have the balance (front to rear) for each side pretty well matched. > >I'm trying to wrap my head around what could be causing the right side to run hotter than the left. Here's some of what I'm thinking...: With this plenum set-up, I'm thinking that the pressure/volume should equalize from left to right. This would leave me with not much to change to cause more cooling air to go from the left to the right - meaning that I probably have to live with the differences. Alternatively, maybe it's not really hotter...the two sets of CHT wires for the left side (both equal length) are about three feet longer than the ones for the right side (again, both equal length). Could the difference in the lengths of the wires account for the reported temperature difference? > >I'm pretty close to thinking that this is as good as it gets...but I would really like to know why... > >Thanks, >Ralph > > > >_________________________________________________________________ >Windows 7: It works the way you want. Learn more. >http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_evergreen:112009v2 ________________________________ Message 2 _____________________________________ Time: 09:35:37 AM PST US From: Deems Herring Subject: RE: LycomingEngines-List: CHT update That sounds like a reasonable plan to me. My guess without looking up the n umbers is that your temperature differentials are with the margin of error for the instrument. If all the temperatures are below your limits I see no reason to change anything. I was just answering your question about how to affect individual cylinder temps not making a recommendation that it was ne cessary. Deems > Date: Tue=2C 24 Nov 2009 08:17:05 -0500 > From: recapen@earthlink.net > To: lycomingengines-list@matronics.com > Subject: RE: LycomingEngines-List: CHT update > thlink.net> > > Thanks Deems=2C > > I haven't touched the underside baffling from Vans stock configuration. G ood methodology suggestion! Based on a number of responses - I think I'll p robably leave it alone for a while and see how it runs. _________________________________________________________________ Bing brings you maps=2C menus=2C and reviews organized in one place. http://www.bing.com/search?q=restaurants&form=MFESRP&publ=WLHMTAG&cre a=TEXT_MFESRP_Local_MapsMenu_Resturants_1x1 ________________________________ Message 3 _____________________________________ Time: 09:52:31 AM PST US From: "Ralph E. Capen" Subject: RE: LycomingEngines-List: CHT update Deems, All temps are within limits. Glad to know there's something else I can do.....if it ever becomes necessary. Flying on..... Ralph -----Original Message----- >From: Deems Herring >Sent: Nov 24, 2009 12:32 PM >To: lycomingengines-list@matronics.com >Subject: RE: LycomingEngines-List: CHT update > > >That sounds like a reasonable plan to me. My guess without looking up the numbers is that your temperature differentials are with the margin of error for the instrument. If all the temperatures are below your limits I see no reason to change anything. I was just answering your question about how to affect individual cylinder temps not making a recommendation that it was necessary. > > > >Deems > > > >> Date: Tue, 24 Nov 2009 08:17:05 -0500 >> From: recapen@earthlink.net >> To: lycomingengines-list@matronics.com >> Subject: RE: LycomingEngines-List: CHT update >> >> >> Thanks Deems, >> >> I haven't touched the underside baffling from Vans stock configuration. Good methodology suggestion! Based on a number of responses - I think I'll probably leave it alone for a while and see how it runs. > >_________________________________________________________________ >Bing brings you maps, menus, and reviews organized in one place. >http://www.bing.com/search?q=restaurants&form=MFESRP&publ=WLHMTAG&crea=TEXT_MFESRP_Local_MapsMenu_Resturants_1x1 ------------------------------------------------------------------------------------- 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.