---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Tue 08/09/16: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:11 AM - (Ralph E. Capen) 2. 06:18 AM - #1 cylinder block-off plate (Ralph E. Capen) 3. 06:23 AM - Re: [RV Builders] (unknown) (Dan Weyant) 4. 06:31 AM - Re: [RV Builders] (unknown) (Ralph E. Capen) 5. 06:38 AM - Re: #1 cylinder block-off plate (Kelly McMullen) 6. 08:41 AM - Re: #1 cylinder block-off plate (Ralph E. Capen) 7. 09:38 AM - Re: #1 cylinder block-off plate (RV6 Flyer) 8. 10:39 AM - Re: #1 cylinder block-off plate (Ralph E. Capen) ________________________________ Message 1 _____________________________________ Time: 06:11:31 AM PST US From: "Ralph E. Capen" For those of you running a four cylinder: What does your #1 block off plate look like? What kind of shape is it? What dimensions at each end? How well does it control / regulate the CHT balance for #1 and #3? Do you notice differences between climb attitude and level flight attitude? My #2 and #4 side seems to be pretty well balanced - even with the oil cooler opening up behind the #4. My #1 and #3 side still has the #3 CHT a little higher than I want it consistently and I have been fiddling with the size/shape of the #1 baffle in an effort to get a better level attitude balance. I have the spacer washer between the #3 baffle wraparound and the cylinder head - but I also have the openings for the muffler/heater air back there at the #3 area as well. I'm trying to get a sense of what is working for folks out there - how big/small, what shape, and how effective. I have installed the 'Turbo' shrouds at the suggestion of my FI vendor to help balance the injector flows - that seems to be working quite well! Thanks, Ralph Capen Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injection ________________________________ Message 2 _____________________________________ Time: 06:18:26 AM PST US From: "Ralph E. Capen" Subject: RV-List: #1 cylinder block-off plate For those of you running a four cylinder: What does your #1 block off plate look like? What kind of shape is it? What dimensions at each end? How well does it control / regulate the CHT balance for #1 and #3? Do you notice differences between climb attitude and level flight attitude? My #2 and #4 side seems to be pretty well balanced - even with the oil cooler opening up behind the #4. My #1 and #3 side still has the #3 CHT a little higher than I want it consistently and I have been fiddling with the size/shape of the #1 baffle in an effort to get a better level attitude balance. I have the spacer washer between the #3 baffle wraparound and the cylinder head - but I also have the openings for the muffler/heater air back there at the #3 area as well. I'm trying to get a sense of what is working for folks out there - how big/small, what shape, and how effective. I have installed the 'Turbo' shrouds at the suggestion of my FI vendor to help balance the injector flows - that seems to be working quite well! Thanks, Ralph Capen Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injection ________________________________ Message 3 _____________________________________ Time: 06:23:38 AM PST US From: "Dan Weyant" Subject: RV-List: RE: [RV Builders] (unknown) Ralph, I=99m running an IO-320 in my RV-9A. I initially had some issues with my #1/#3 side running hotter on #1 than #3 =2E I started slowly cutting my block off plate away. I eventually wound up removing it entirely. Obviously each install is a little different. When I had one it was about 3 inches long (covered about the lower =C2=BD o f the #1. And about 2 inches high, rougly rectangle shapped I notice a big difference between cruise and climb. I think it is mostly r elated to airspeed. Slower airspeed and full power I have to really watch my CHT=99s. I usually run in the high 300=99s during climb. A t cruise leaned out I run about 350-370. -Dan From: RV7A@yahoogroups.com [mailto:RV7A@yahoogroups.com] Sent: Tuesday, August 09, 2016 8:11 AM Subject: [RV Builders] (unknown) For those of you running a four cylinder: What does your #1 block off plate look like? What kind of shape is it? What dimensions at each end? How well does it control / regulate the CHT balance for #1 and #3? Do you notice differences between climb attitude and level flight attitude? My #2 and #4 side seems to be pretty well balanced - even with the oil cool er opening up behind the #4. My #1 and #3 side still has the #3 CHT a littl e higher than I want it consistently and I have been fiddling with the size /shape of the #1 baffle in an effort to get a better level attitude balance =2E I have the spacer washer between the #3 baffle wraparound and the cylin der head - but I also have the openings for the muffler/heater air back the re at the #3 area as well. I'm trying to get a sense of what is working for folks out there - how big/ small, what shape, and how effective. I have installed the 'Turbo' shrouds at the suggestion of my FI vendor to h elp balance the injector flows - that seems to be working quite well! Thanks, Ralph Capen Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injectio n __._,_.___ _____ Posted by: "Ralph E. Capen" > _____ Reply via web post =A2 Reply to sender =A2 Reply t o group =A2 Start a New Topic =A2 Messages in this topic (1) _____ Have you tried the highest rated email app? With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inbox es (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage. _____ Want more RV news? Sign up for the RV Builder's Hotline. It's free! http://rvbuildershotline.com Visit Your Group =A2 Pr ivacy =A2 Unsubscribe =A2 Terms of Use =2E __,_._,___ --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 4 _____________________________________ Time: 06:31:39 AM PST US From: "Ralph E. Capen" Subject: RV-List: RE: [RV Builders] (unknown) Thanks Dan! -----Original Message----- From: "'Dan Weyant' dan@weyant.net [RV7A]" Sent: Aug 9, 2016 9:22 AM Subject: RE: [RV Builders] (unknown) Ralph, Im running an IO-320 in my RV-9A. I initially had some issues with my #1/#3 side running hotter on #1 than #3. I started slowly cutting my block off plate away. I eventually wound up removing it entirely. Obviously each install is a little different. When I had one it was about 3 inches long (covered about the lower of the #1. And about 2 inches high, rougly rectangle shapped I notice a big difference between cruise and climb. I think it is mostly related to airspeed. Slower airspeed and full power I have to really watch my CHTs. I usually run in the high 300s during climb. At cruise leaned out I run about 350-370. -Dan From: RV7A@yahoogroups.com [mailto:RV7A@yahoogroups.com] Sent: Tuesday, August 09, 2016 8:11 AM Subject: [RV Builders] (unknown) For those of you running a four cylinder: What does your #1 block off plate look like? What kind of shape is it? What dimensions at each end? How well does it control / regulate the CHT balance for #1 and #3? Do you notice differences between climb attitude and level flight attitude? My #2 and #4 side seems to be pretty well balanced - even with the oil cooler opening up behind the #4. My #1 and #3 side still has the #3 CHT a little higher than I want it consistently and I have been fiddling with the size/shape of the #1 baffle in an effort to get a better level attitude balance. I have the spacer washer between the #3 baffle wraparound and the cylinder head - but I also have the openings for the muffler/heater air back there at the #3 area as well. I'm trying to get a sense of what is working for folks out there - how big/small, what shape, and how effective. I have installed the 'Turbo' shrouds at the suggestion of my FI vendor to help balance the injector flows - that seems to be working quite well! Thanks, Ralph Capen Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injection This email has been checked for viruses by Avast antivirus software. www.avast.com __._,_.___ Posted by: "Dan Weyant" Want more RV news? Sign up for the RV Builder's Hotline. It's free! http://rvbuildershotline.com Visit Your Group Privacy Unsubscribe Terms of Use __,_._,___ ________________________________ Message 5 _____________________________________ Time: 06:38:12 AM PST US Subject: Re: RV-List: #1 cylinder block-off plate From: Kelly McMullen You want the baffle to sit in front of the #1 cylinder head. You vary the height to get the desired balance. I recommend using aluminum tape for testing what dimension you need. For my -10, Vans supplied the baffle, too large, and it had to be trimmed to size. (It was part of the engine baffle kit, if I recall correctly. #2 needs a spacer between the cyl head and the baffle, just like the rear of #3. If you need, I can send you a document written for Cessna Cardinals. The factory didn't put in spacers, and the CHTs ran about 40 degrees hotter without spacers. All due to the intake side of Lyc cylinder heads having virtually no cooling fins. On 8/9/2016 6:17 AM, Ralph E. Capen wrote: > > For those of you running a four cylinder: > What does your #1 block off plate look like? > What kind of shape is it? > What dimensions at each end? > How well does it control / regulate the CHT balance for #1 and #3? > Do you notice differences between climb attitude and level flight attitude? > > My #2 and #4 side seems to be pretty well balanced - even with the oil cooler opening up behind the #4. My #1 and #3 side still has the #3 CHT a little higher than I want it consistently and I have been fiddling with the size/shape of the #1 baffle in an effort to get a better level attitude balance. I have the spacer washer between the #3 baffle wraparound and the cylinder head - but I also have the openings for the muffler/heater air back there at the #3 area as well. > > I'm trying to get a sense of what is working for folks out there - how big/small, what shape, and how effective. > > I have installed the 'Turbo' shrouds at the suggestion of my FI vendor to help balance the injector flows - that seems to be working quite well! > > Thanks, > Ralph Capen > Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injection > > ________________________________ Message 6 _____________________________________ Time: 08:41:25 AM PST US From: "Ralph E. Capen" Subject: Re: RV-List: #1 cylinder block-off plate Thanks! The baffle kit for the O360 from Vans didn't have the #1 front plate from my recollection (I assembled those parts almost ten years ago and have been flying for a while). What I ended up with is well within limits - just higher for the #3 and I think it could be better! The most recent 'tests' with a larger #1 block-off plate had the #3 CHT go up - so I'm thinking there is some sort of flow burble in there (yes, I checked the CHT sensor wiring!). I have the washer spacer on the back of the #3 - I can make it thicker or thinner too as part of this experiment. I'll take the Cardinal document please! I'm interested in the shapes and sizes that folks are happy with. Thanks again! -----Original Message----- >From: Kelly McMullen >Sent: Aug 9, 2016 9:38 AM >To: rv-list@matronics.com >Subject: Re: RV-List: #1 cylinder block-off plate > > >You want the baffle to sit in front of the #1 cylinder head. You vary >the height to get the desired balance. I recommend using aluminum tape >for testing what dimension you need. For my -10, Vans supplied the >baffle, too large, and it had to be trimmed to size. (It was part of the >engine baffle kit, if I recall correctly. #2 needs a spacer between the >cyl head and the baffle, just like the rear of #3. If you need, I can >send you a document written for Cessna Cardinals. The factory didn't put >in spacers, and the CHTs ran about 40 degrees hotter without spacers. >All due to the intake side of Lyc cylinder heads having virtually no >cooling fins. > >On 8/9/2016 6:17 AM, Ralph E. Capen wrote: >> >> For those of you running a four cylinder: >> What does your #1 block off plate look like? >> What kind of shape is it? >> What dimensions at each end? >> How well does it control / regulate the CHT balance for #1 and #3? >> Do you notice differences between climb attitude and level flight attitude? >> >> My #2 and #4 side seems to be pretty well balanced - even with the oil cooler opening up behind the #4. My #1 and #3 side still has the #3 CHT a little higher than I want it consistently and I have been fiddling with the size/shape of the #1 baffle in an effort to get a better level attitude balance. I have the spacer washer between the #3 baffle wraparound and the cylinder head - but I also have the openings for the muffler/heater air back there at the #3 area as well. >> >> I'm trying to get a sense of what is working for folks out there - how big/small, what shape, and how effective. >> >> I have installed the 'Turbo' shrouds at the suggestion of my FI vendor to help balance the injector flows - that seems to be working quite well! >> >> Thanks, >> Ralph Capen >> Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injection >> >> >> >> >> >> >> >> > > ________________________________ Message 7 _____________________________________ Time: 09:38:14 AM PST US From: RV6 Flyer Subject: Re: RV-List: #1 cylinder block-off plate Check out Van's OP-40 (360) and OP-44 drawings. Both use CB-1000B for left and right air dams on the cylinder heads. I made my own out of 0.025 and used RTV silicone to hold them in place. Va ry the height to vary the temperature. When I had Superior cylinders, I ne ed the stock size to keep #2 cylinder up and it was still the coldest. Goi ng to ECI Steel Cylinders, #2 now has NO temperature riser and is typically the hottest or 2nd hottest in cruise. Power settings and altitude all det ermine what cylinder on my airplane is the hottest. In climb, #3 & #4 are the hottest but in 23 squared cruise flight, #1 & #2 are the hottest. Photo is taken from Van's drawings listed above. Part number can be found on http://vansaircraft.com/public/parts.txt Gary A. Sobek "My Sanity" RV-6 N157GS O-320 Hartzell, 3,180+ Flying Hours Pennsylvania, USA ________________________________ From: owner-rv-list-server@matronics.com on behalf of Ralph E. Capen Sent: Tuesday, August 9, 2016 3:40:10 PM Subject: Re: RV-List: #1 cylinder block-off plate Thanks! The baffle kit for the O360 from Vans didn't have the #1 front plate from m y recollection (I assembled those parts almost ten years ago and have been flying for a while). What I ended up with is well within limits - just hig her for the #3 and I think it could be better! The most recent 'tests' wit h a larger #1 block-off plate had the #3 CHT go up - so I'm thinking there is some sort of flow burble in there (yes, I checked the CHT sensor wiring! ). I have the washer spacer on the back of the #3 - I can make it thicker or t hinner too as part of this experiment. I'll take the Cardinal document please! I'm interested in the shapes and sizes that folks are happy with. Thanks again! -----Original Message----- >From: Kelly McMullen >Sent: Aug 9, 2016 9:38 AM >To: rv-list@matronics.com >Subject: Re: RV-List: #1 cylinder block-off plate > > >You want the baffle to sit in front of the #1 cylinder head. You vary >the height to get the desired balance. I recommend using aluminum tape >for testing what dimension you need. For my -10, Vans supplied the >baffle, too large, and it had to be trimmed to size. (It was part of the >engine baffle kit, if I recall correctly. #2 needs a spacer between the >cyl head and the baffle, just like the rear of #3. If you need, I can >send you a document written for Cessna Cardinals. The factory didn't put >in spacers, and the CHTs ran about 40 degrees hotter without spacers. >All due to the intake side of Lyc cylinder heads having virtually no >cooling fins. > >On 8/9/2016 6:17 AM, Ralph E. Capen wrote: >> >> For those of you running a four cylinder: >> What does your #1 block off plate look like? >> What kind of shape is it? >> What dimensions at each end? >> How well does it control / regulate the CHT balance for #1 and #3? >> Do you notice differences between climb attitude and level flight attitu de? >> >> My #2 and #4 side seems to be pretty well balanced - even with the oil c ooler opening up behind the #4. My #1 and #3 side still has the #3 CHT a l ittle higher than I want it consistently and I have been fiddling with the size/shape of the #1 baffle in an effort to get a better level attitude bal ance. I have the spacer washer between the #3 baffle wraparound and the cy linder head - but I also have the openings for the muffler/heater air back there at the #3 area as well. >> >> I'm trying to get a sense of what is working for folks out there - how b ig/small, what shape, and how effective. >> >> I have installed the 'Turbo' shrouds at the suggestion of my FI vendor t o help balance the injector flows - that seems to be working quite well! >> >> Thanks, >> Ralph Capen >> Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injec tion >> >> >> >> >> >> >> >> > > ________________________________ Message 8 _____________________________________ Time: 10:39:41 AM PST US From: "Ralph E. Capen" Subject: Re: RV-List: #1 cylinder block-off plate Thanks Gary, I wasn't able to find OP-40 or OP-44 in the list - I did find OP-4 though - must be for the set - looks like this for an 8. I'll dig around and see if I can find them in my drawings folder. I have the drawings for the 6 - 360 (not real drawings like the OP's that you reference) Ralphand it doesn't have the one for the passenger side - the one for the pilot's side is almost identical to the 6 - 360 drawing...and waaay smaller than the picture you sent. Mine for the passenger side is a similar shape - but smaller so it looks like I have some fiddle room! -----Original Message----- From: RV6 Flyer Sent: Aug 9, 2016 12:37 PM Subject: Re: RV-List: #1 cylinder block-off plate Check out Van's OP-40 (360) and OP-44 drawings. Both use CB-1000B for left and right air dams on the cylinder heads. I made my own out of 0.025 and used RTV silicone to hold them in place. Vary the height to vary the temperature. When I had Superior cylinders, I need the stock size to keep #2 cylinder up and it was still the coldest. Going to ECI Steel Cylinders, #2 now has NO temperature riser and is typically the hottest or 2nd hottest in cruise. Power settings and altitude all determine what cylinder on my airplane is the hottest. In climb, #3 & #4 are the hottest but in 23 squared cruise flight, #1 & #2 are the hottest. Photo is taken from Van's drawings listed above. Part number can be found on http://vansaircraft.com/public/parts.txt Gary A. Sobek "My Sanity" RV-6 N157GS O-320 Hartzell, 3,180+ Flying Hours Pennsylvania, USA From: owner-rv-list-server@matronics.com on behalf of Ralph E. Capen Sent: Tuesday, August 9, 2016 3:40:10 PM Subject: Re: RV-List: #1 cylinder block-off plate Thanks! The baffle kit for the O360 from Vans didn't have the #1 front plate from my recollection (I assembled those parts almost ten years ago and have been flying for a while). What I ended up with is well within limits - just higher for the #3 and I think it could be better! The most recent 'tests' with a larger #1 block-off plate had the #3 CHT go up - so I'm thinking there is some sort of flow burble in there (yes, I checked the CHT sensor wiring!). I have the washer spacer on the back of the #3 - I can make it thicker or thinner too as part of this experiment. I'll take the Cardinal document please! I'm interested in the shapes and sizes that folks are happy with. Thanks again! -----Original Message----- >From: Kelly McMullen >Sent: Aug 9, 2016 9:38 AM >To: rv-list@matronics.com >Subject: Re: RV-List: #1 cylinder block-off plate > > >You want the baffle to sit in front of the #1 cylinder head. You vary >the height to get the desired balance. I recommend using aluminum tape >for testing what dimension you need. For my -10, Vans supplied the >baffle, too large, and it had to be trimmed to size. (It was part of the >engine baffle kit, if I recall correctly. #2 needs a spacer between the >cyl head and the baffle, just like the rear of #3. If you need, I can >send you a document written for Cessna Cardinals. The factory didn't put >in spacers, and the CHTs ran about 40 degrees hotter without spacers. >All due to the intake side of Lyc cylinder heads having virtually no >cooling fins. > >On 8/9/2016 6:17 AM, Ralph E. Capen wrote: >> >> For those of you running a four cylinder: >> What does your #1 block off plate look like? >> What kind of shape is it? >> What dimensions at each end? >> How well does it control / regulate the CHT balance for #1 and #3? >> Do you notice differences between climb attitude and level flight attitude? >> >> My #2 and #4 side seems to be pretty well balanced - even with the oil cooler opening up behind the #4. My #1 and #3 side still has the #3 CHT a little higher than I want it consistently and I have been fiddling with the size/shape of the #1 baffle in an effort to get a better level attitude balance. I have the spacer washer between the #3 baffle wraparound and the cylinder head - but I also have the openings for the muffler/heater air back there at the #3 area as well. >> >> I'm trying to get a sense of what is working for folks out there - how big/small, what shape, and how effective. >> >> I have installed the 'Turbo' shrouds at the suggestion of my FI vendor to help balance the injector flows - that seems to be working quite well! >> >> Thanks, >> Ralph Capen >> Aerosport XP IO360B1F6 with LASAR ignition and Airflow Performance injection >> >> >> >> >> >> >> >> > > > > ========== mail Forum - ist">http://www.matronics.com/Navigator?RV-List ========== p; - MATRONICS WEB FORUMS - ums.matronics.com ========== p; - NEW MATRONICS LIST WIKI - matronics.com ========== p; - List Contribution Web Site - p; -Matt Dralle, List Admin. http://www.matronics.com/contribution ========== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-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/rv-list Browse Digests http://www.matronics.com/digest/rv-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.