Exhaust pipe wrap - Zenith Aircraft Builders and Flyers2024-03-29T05:32:26Zhttps://zenith.aero/forum/topics/exhaust-pipe-wrap?commentId=2606393%3AComment%3A727403&feed=yes&xn_auth=noI have to same problem.
first…tag:zenith.aero,2021-11-19:2606393:Comment:8537212021-11-19T22:24:08.036ZNeil Cooperhttps://zenith.aero/profile/NeilCooper
<p>I have to same problem.</p>
<p>first I got stainless pipes made. Then got ceramic coated. Didn’t make a scrap of difference. Waste of money (getting ceramic)</p>
<p>I know wrapping will eventually make the pipes break down earlier but I accept that I will have to have new stainless pipes made when that time comes. Wrapping my exhaust pipes gave much cooler temps under the cowl. I monitor the temps. If they start rising again I will re wrap as required. Has lasted a long time now tho. The…</p>
<p>I have to same problem.</p>
<p>first I got stainless pipes made. Then got ceramic coated. Didn’t make a scrap of difference. Waste of money (getting ceramic)</p>
<p>I know wrapping will eventually make the pipes break down earlier but I accept that I will have to have new stainless pipes made when that time comes. Wrapping my exhaust pipes gave much cooler temps under the cowl. I monitor the temps. If they start rising again I will re wrap as required. Has lasted a long time now tho. The heat under the cowl affected both my oil and coolant temps due to the tight cowl set up. I use 1/3 pre mix coolant which has better thermal transfer. Wrap on its own though, brought temps down on both by 10°C</p>
<p>left photo is original temps. Middle is with wrap,right is with 1/3 coolant mix</p>
<p>make sure you use a good titaniaum wrap. No cheap stuff.</p> i use if for two reasons , fi…tag:zenith.aero,2021-03-02:2606393:Comment:8266682021-03-02T04:19:45.903ZKevin Beriaulthttps://zenith.aero/profile/KevinBeriault
<p><em>i use if for two reasons , firstly it helps keep my cowling temperature down after a flight to prevent vapor lock and secondly to protect the lower cowling itself from damage .. it works very well</em></p>
<p><em>Kevin</em></p>
<p><em>i use if for two reasons , firstly it helps keep my cowling temperature down after a flight to prevent vapor lock and secondly to protect the lower cowling itself from damage .. it works very well</em></p>
<p><em>Kevin</em></p> Tnx...
Put it on last year..…tag:zenith.aero,2021-01-14:2606393:Comment:8037782021-01-14T18:29:07.711ZPhil Smithhttps://zenith.aero/profile/PhilSmith
<p>Tnx...</p>
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<p>Put it on last year...because of some health issues didn't get to do much flying to observe temps...always next summer</p>
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<p>Still grinin</p>
<p>Phil</p>
<p>Tnx...</p>
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<p>Put it on last year...because of some health issues didn't get to do much flying to observe temps...always next summer</p>
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<p>Still grinin</p>
<p>Phil</p> Good discussion here https://…tag:zenith.aero,2021-01-14:2606393:Comment:8037052021-01-14T13:14:57.689ZJim and Amelia Isaacshttps://zenith.aero/profile/JimIsaacs
<p>Good discussion here <a href="https://www.rotax-owner.com/en/912-914-technical-questions/8434-914-exhaust-leak?start=10" target="_blank">https://www.rotax-owner.com/en/912-914-technical-questions/8434-914-exhaust-leak?start=10</a></p>
<p>Good discussion here <a href="https://www.rotax-owner.com/en/912-914-technical-questions/8434-914-exhaust-leak?start=10" target="_blank">https://www.rotax-owner.com/en/912-914-technical-questions/8434-914-exhaust-leak?start=10</a></p> Here a picture of my installa…tag:zenith.aero,2020-07-22:2606393:Comment:7293742020-07-22T09:13:05.553ZMichel Rufhttps://zenith.aero/profile/MichelRuf
<p>Here a picture of my installation. Engine temps are good.</p>
<p>Here a picture of my installation. Engine temps are good.</p> needs to be stainless. Have b…tag:zenith.aero,2020-07-09:2606393:Comment:7277222020-07-09T05:11:30.043ZMartin Bimahttps://zenith.aero/profile/MartinBima
needs to be stainless. Have been running wrap for over 6 years. Wont go back to bare pipes.
needs to be stainless. Have been running wrap for over 6 years. Wont go back to bare pipes. As I previously pointed out,…tag:zenith.aero,2020-07-06:2606393:Comment:7273322020-07-06T12:20:56.534ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>As I previously pointed out, I don't have the headers wrapped so no issues there, anyway - with there being 6 of them very closely crowded together, it's just too complex to wrap them or cover them without making inspection and maintenance too difficult. But I did wrap and later used "Heatshield Armor" on the muffler to cut down radiated heat to the carb above it to avoid vapor lock problems. I thought this would help in addition to the carb's aluminum heat deflector that was between it…</p>
<p>As I previously pointed out, I don't have the headers wrapped so no issues there, anyway - with there being 6 of them very closely crowded together, it's just too complex to wrap them or cover them without making inspection and maintenance too difficult. But I did wrap and later used "Heatshield Armor" on the muffler to cut down radiated heat to the carb above it to avoid vapor lock problems. I thought this would help in addition to the carb's aluminum heat deflector that was between it and the muffler.</p>
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<p>However, a second reason for the insulation applies exactly to your corrected logic. The only vacant exhaust pipe space for a cabin heat muff was on the exhaust immediately downstream of the muffler. I reasoned that insulating the muffler would transfer some of the heat further downstream and enhance the effectiveness of the cabin heat muff. I also insulated the exterior of the cabin heat muff to cut down on radiated heat losses there, too. Works great!</p>
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<p>John</p> I woke up tonight with the th…tag:zenith.aero,2020-07-06:2606393:Comment:7274042020-07-06T07:16:16.619ZBob Hartunianhttps://zenith.aero/profile/BobHartunian
<p>I woke up tonight with the thought that I made a mistake in logic. If the SS pipe inherently withstands the 1300F exhaust gas, then wrapping it does not increase the gas temp, it just extends the distance that the pipe stays hot. So wrapping the SS pipe should not effect it's longevity. I stand corrected.</p>
<p>I woke up tonight with the thought that I made a mistake in logic. If the SS pipe inherently withstands the 1300F exhaust gas, then wrapping it does not increase the gas temp, it just extends the distance that the pipe stays hot. So wrapping the SS pipe should not effect it's longevity. I stand corrected.</p> You are correct in that any o…tag:zenith.aero,2020-07-06:2606393:Comment:7274032020-07-06T04:06:38.239ZBob Hartunianhttps://zenith.aero/profile/BobHartunian
<p><br></br><span>You are correct in that any oxidation breakdown is a function of temperature and time. And the chrome in SS resists that breakdown. But if you operate for prolonged times at 1300F with pipes wrapped, they will eventually oxidize, even SS.</span><br></br><span>You could keep wraps on and periodically inspect for problems like micro cracks. The higher grades of stainless like 316 or 321 will have more resistance to breakdown and lower grades like 304 will have lesser…</span></p>
<p><br/><span>You are correct in that any oxidation breakdown is a function of temperature and time. And the chrome in SS resists that breakdown. But if you operate for prolonged times at 1300F with pipes wrapped, they will eventually oxidize, even SS.</span><br/><span>You could keep wraps on and periodically inspect for problems like micro cracks. The higher grades of stainless like 316 or 321 will have more resistance to breakdown and lower grades like 304 will have lesser resistance.</span><br/><br/><span>When you use a coating to keep oxygen from the steel, any minor crack in the coating will allow O2 in and start the process. Expansion/contraction from thermal cycling can initiate cracks in coating. Much better to have intrinsic oxidation resistance of pipes from selection of base material.</span></p> If you wrap/insulate exhaust…tag:zenith.aero,2020-07-05:2606393:Comment:7273752020-07-05T18:42:13.202ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p><em>If you wrap/insulate exhaust pipes to retain radiant heat in pipes, the pipes will run hotter and the steel will be prone to higher thermal oxidation (long-term breakdown). </em></p>
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<p>Isn't that more of a concern with mild steel pipes vs stainless? I don't have the headers wrapped on my Jab 3300, but the entire exhaust system is stainless. When I took exhaust wrap off the stainless muffler to install the "Heatshield Armor," the stainless muffler appeared totally unaffected…</p>
<p><em>If you wrap/insulate exhaust pipes to retain radiant heat in pipes, the pipes will run hotter and the steel will be prone to higher thermal oxidation (long-term breakdown). </em></p>
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<p>Isn't that more of a concern with mild steel pipes vs stainless? I don't have the headers wrapped on my Jab 3300, but the entire exhaust system is stainless. When I took exhaust wrap off the stainless muffler to install the "Heatshield Armor," the stainless muffler appeared totally unaffected by the wrap, but of course the muffler surface temperature is much lower vs the headers.</p>
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<p>The ultimate treatment would be to coat the pipes inside and out with a ceramic coating such as "Jet Hot." I had auto headers treated with it and it looked same-as-new even after several years!</p>
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<p>John</p>