---------------------------------------------------------- RV8-List Digest Archive --- Total Messages Posted Wed 08/10/11: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:30 AM - Re: Re: RV-8 Cowl Vents (Matt Dralle) 2. 01:44 PM - Re: Re: RV-8 Cowl Vents (japhillipsga@aol.com) 3. 06:55 PM - Re: Re: RV-8 Cowl Vents (Matt Dralle) 4. 08:07 PM - Re: RV-8 Cowl Vents (Speedy11@aol.com) ________________________________ Message 1 _____________________________________ Time: 09:30:59 AM PST US From: Matt Dralle Subject: Re: RV8-List: Re: RV-8 Cowl Vents Oh, my... I missed the part where you had installed the air dam baffle in front of #1! Get rid of that completely. The Baffle Plans say to start *without* this baffle and then add it IF #1 is running too cool. I never installed this air dam and have never had any problems with #1. Matt - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... At 09:06 PM 8/9/2011 Tuesday, you wrote: >Stan, I tested the CHT probes and they are correct. I have the standard Van's baffle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch off the top and noted a small drop in CHT tempt, but it did not even out with the other three jugs. I'll just not worry about it until after I get the wheel pants and leggings all installed. Thanks for the help, Bill > > >-----Original Message----- >From: Speedy11 >To: rv8-list >Sent: Tue, Aug 9, 2011 11:35 pm >Subject: RV8-List: Re: RV-8 Cowl Vents > >Bill, >I sure agree with Matt on this subject. I would investigate other causes for the high CHT before cutting up the cowling. I would cut the cowling only if all CHTs were too high. >His ideas are good ones and you also might try swapping the #1 and #3 CHT probes. Maybe #1 is reading high. >It is very odd that #1 cylinder would be your hot one. Did you add an air dam in front of it? If so, have you tried different size dams? Or removing the air dam? > >Stan Sutterfield >Do not archive > >In a message dated 8/9/2011 3:09:02 A.M. Eastern Daylight Time, rv8-list@matronics.com writes: >Before you start cutting holes in your cowling, you might want to do some more >investigation into the cause of the overheating. Might be indicative of something >else. Plugged oil line to that cylinder, maybe a blocked fuel injector on >that cylinder? Try swapping the injectors between the hottest and coolest cylinder >and see what impact this has on the CHT. > > ________________________________ Message 2 _____________________________________ Time: 01:44:06 PM PST US Subject: Re: RV8-List: Re: RV-8 Cowl Vents From: japhillipsga@aol.com Matt, I'll do that before I fly again. BTW How is the rebuild coming? We a ll expect to see her better and faster than before. Thanks, Bill -----Original Message----- From: Matt Dralle Sent: Wed, Aug 10, 2011 12:31 pm Subject: Re: RV8-List: Re: RV-8 Cowl Vents Oh, my... I missed the part where you had installed the air dam baffle in front f #1! Get rid of that completely. The Baffle Plans say to start *without* his baffle and then add it IF #1 is running too cool. I never installed th is ir dam and have never had any problems with #1. Matt - att Dralle V-8 #82880 N998RV "Ruby Vixen" ttp://www.mattsrv8.com - Matt's Complete RV-8 Construction Log ttp://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log ttp://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel tatus: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... t 09:06 PM 8/9/2011 Tuesday, you wrote: Stan, I tested the CHT probes and they are correct. I have the standard Van 's affle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch off the top nd noted a small drop in CHT tempt, but it did not even out with the other hree jugs. I'll just not worry about it until after I get the wheel pants a nd eggings all installed. Thanks for the help, Bill -----Original Message----- From: Speedy11 Sent: Tue, Aug 9, 2011 11:35 pm Subject: RV8-List: Re: RV-8 Cowl Vents Bill, I sure agree with Matt on this subject. I would investigate other causes f or he high CHT before cutting up the cowling. I would cut the cowling only if all HTs were too high. His ideas are good ones and you also might try swapping the #1 and #3 CHT robes. Maybe #1 is reading high. It is very odd that #1 cylinder would be your hot one. Did you add an air dam n front of it? If so, have you tried different size dams? Or removing th e ir dam? Stan Sutterfield Do not archive In a message dated 8/9/2011 3:09:02 A.M. Eastern Daylight Time, mailto:rv8-list@matronics.com>rv8-list@matronics.com writes: Before you start cutting holes in your cowling, you might want to do some m ore investigation into the cause of the overheating. Might be indicative of omething else. Plugged oil line to that cylinder, maybe a blocked fuel injector on that cylinder? Try swapping the injectors between the hottest and coolest ylinder and see what impact this has on the CHT. -======================== -= - The RV8-List Email Forum - -= Use the Matronics List Features Navigator to browse -= the many List utilities such as List Un/Subscription, -= Archive Search & Download, 7-Day Browse, Chat, FAQ, -= Photoshare, and much much more: - -= --> http://www.matronics.com/Navigator?RV8-List - -======================== -= - MATRONICS WEB FORUMS - -= Same great content also available via the Web Forums! - -= --> http://forums.matronics.com - -======================== -= - List Contribution Web Site - -= Thank you for your generous support! -= -Matt Dralle, List Admin. -= --> http://www.matronics.com/contribution -======================== ________________________________ Message 3 _____________________________________ Time: 06:55:56 PM PST US From: Matt Dralle Subject: Re: RV8-List: Re: RV-8 Cowl Vents The rebuild is coming alone nicely. Definitely going faster the second time. I'm shooting to re-test fly in the Spring. Just getting ready to start the wiring this weekend. With the wiring complete, how much more could there be? Matt At 01:40 PM 8/10/2011 Wednesday, you wrote: >Matt, I'll do that before I fly again. BTW How is the rebuild coming? We all expect to see her better and >faster than before. Thanks, Bill > > >-----Original Message----- >From: Matt Dralle >To: rv8-list >Sent: Wed, Aug 10, 2011 12:31 pm >Subject: Re: RV8-List: Re: RV-8 Cowl Vents > > > >Oh, my... I missed the part where you had installed the air dam baffle in front >of #1! Get rid of that completely. The Baffle Plans say to start *without* >this baffle and then add it IF #1 is running too cool. I never installed this >air dam and have never had any problems with #1. > >Matt > >- >Matt Dralle >RV-8 #82880 N998RV "Ruby Vixen" >http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log >http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log >http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel >Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... > > >At 09:06 PM 8/9/2011 Tuesday, you wrote: >>Stan, I tested the CHT probes and they are correct. I have the standard Van's >baffle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch off the top >and noted a small drop in CHT tempt, but it did not even out with the other >three jugs. I'll just not worry about it until after I get the wheel pants and >leggings all installed. Thanks for the help, Bill >> >> >> >>-----Original Message----- >>From: Speedy11 <Speedy11@aol.com> >>To: rv8-list <rv8-list@matronics.com> >>Sent: Tue, Aug 9, 2011 11:35 pm >>Subject: RV8-List: Re: RV-8 Cowl Vents >> >>Bill, >>I sure agree with Matt on this subject. I would investigate other causes for >the high CHT before cutting up the cowling. I would cut the cowling only if all >CHTs were too high. >>His ideas are good ones and you also might try swapping the #1 and #3 CHT >probes. Maybe #1 is reading high. >>It is very odd that #1 cylinder would be your hot one. Did you add an air dam >in front of it? If so, have you tried different size dams? Or removing the >air dam? >> >>Stan Sutterfield >>Do not archive >> >>In a message dated 8/9/2011 3:09:02 A.M. Eastern Daylight Time, ><mailto:rv8-list@matronics.com>rv8-list@matronics.com writes: >>Before you start cutting holes in your cowling, you might want to do some more >>investigation into the cause of the overheating. Might be indicative of >something >>else. Plugged oil line to that cylinder, maybe a blocked fuel injector on >>that cylinder? Try swapping the injectors between the hottest and coolest >cylinder >>and see what impact this has on the CHT. >> >> > > >et=_blank>http://www.matronics.com/Navigator?RV8-List >p://forums.matronics.com >blank>http://www.matronics.com/contribution > > Matt G Dralle | Matronics | 581 Jeannie Way | Livermore | CA | 94550 925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email http://www.matronics.com/ WWW | Featuring Products For Aircraft ________________________________ Message 4 _____________________________________ Time: 08:07:25 PM PST US From: Speedy11@aol.com Subject: RV8-List: Re: RV-8 Cowl Vents Bill, I initially flew my RV with no dam in front of #1 cylinder. It was running about 30 degrees cooler than the others so I added a "ski ramp" air dam that is easily replaced. I can try different shapes and sizes until I get the temp just right. I've never liked the blunt, brute force air dams placed in front of cylinders, so I made a more aerodynamic, easily replaceable, easily modified air dam. You can see a photos and comments at _http://www.rv-8a.net/2009Jul.htm_ (http://www.rv-8a.net/2009Jul.htm) and _http://www.rv-8a.net/2010Jun.htm_ (http://www.rv-8a.net/2010Jun.htm) Stan Sutterfield In a message dated 8/10/2011 3:07:05 A.M. Eastern Daylight Time, rv8-list@matronics.com writes: I tested the CHT probes and they are correct. I have the standard Va n's baffle wind dam in front of # 1 Cylinder. I trimmed about 5/8th inch of f the top and noted a small drop in CHT tempt, but it did not even out with the other three jugs. I'll just not worry about it until after I get the w heel pants and leggings all installed. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv8-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV8-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/rv8-list Browse Digests http://www.matronics.com/digest/rv8-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.