HarryP Posted July 6, 2008 Share Posted July 6, 2008 Hey group, Harry from NJ here... Wondering if I could get a sanity check from the group on a 4-pipe exhaust installation. I couldn't find the detail I needed on the web, so I am asking the question. I've been replacing the exhaust with Hal Hunt's in-the-cowl pipes. The mounting instructions are not explicit and I know cracks can develop if the pipes are not properly supported. I have attached some photos of my interpretation of the bracing installation so...any comments on the bracing arrangement would be greatly appreciated! I installed the braces just today and put photos up at http://ph.groups.yahoo.com/group/EAA73/photos/browse/c75f I made some design assumptions when I fabbed them: 1. The purpose of the brace is to restrain the vertical movement of the pipes. Since they are free to swivel horizontally around the flange piece, I made the braces stiffest in the vertical plane. 2. The instructions say to attach the brace between the short pipe and a rocker cover screw, but that seemed to be too close to the flange piece to have any effect...so I used the rear-most baffle screw as a mounting point. 3. The instructions call out spring-loaded SS clamps. I assume this is to let things slide around to damp out the vibes. 4. The #2 oil return and primer lines are VERY close to the pipe! I made a heatshield and plan to line it with fiberfrax. Please don't hesitate to point out any issues you may see, you won't hurt my feelings by pointing out shortcomings. I'd rather be safe. Harry Parsons Long-EZ N828HP Quote Visit www.GAservingAmerica.org to learn about General Aviation’s critical role in our national economy and the essential role it plays in the daily lives of all Americans. Link to comment Share on other sites More sharing options...
HarryP Posted July 7, 2008 Author Share Posted July 7, 2008 Several members have tried to help me but I put the photos in a non-public area...If anyone is still inclined to help the photos can be seen at: http://www.flickr.com/photos/ez-driver/sets/72157606022342843/ Sorry for the confusion! Harry P N828HP Quote Visit www.GAservingAmerica.org to learn about General Aviation’s critical role in our national economy and the essential role it plays in the daily lives of all Americans. Link to comment Share on other sites More sharing options...
steve Posted July 7, 2008 Share Posted July 7, 2008 i think the hole thing looks gr8 ! two things i mite look at, the crushed ends of the tubes, the one end is hard bolted and the other end is clamped to a large hot vibrating moving part. if i was that little part and had a weakness, i bet it would be in the vortex of the bend. just one mans point of view . are they heat softened and made from 4130 cm ? Quote Steve M. Parkins Link to comment Share on other sites More sharing options...
NeilK Posted July 11, 2008 Share Posted July 11, 2008 Harry, I have the exact same system so I'm interested in what you have done. Unfortunately, I can't see the pics from either link. Can you attached them here? Neil Quote Link to comment Share on other sites More sharing options...
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