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George<BR>
<BR>
In a totally different project years ago, I had a similar dilemma... I used a piece of woven stainless<BR>
tubing, inside an outer jacket. The tubing is made to slide over heater hoses, vaccum lines on engines.<BR>
I can't tell you right off hand where to get it, but I'd bet some of the better automotive stores would have<BR>
it or could get it. I simply cut a piece a little longer than the hi temp rubber coupler, slid it inside the <BR>
coupler, then slid both layers over the header/muffler fittings. Seemed to work well, I never had any<BR>
blow through problems again.... You could slide this stuff into the teflon, then attach. most of the heat<BR>
would slide right on through. BTW, it was tough to cut, and I eventually settled on a diamond wheel to <BR>
get a clean cut. The neat thing about this stuff is that it's like chinese finger cuffs... you pull on each end<BR>
and it shrinks in diameter, push it together and it expands.<BR>
<BR>
<BR>
Rex<BR> <BR>> Date: Mon, 1 Jun 2009 17:07:27 -0500<BR>> From: glmiller3@suddenlink.net<BR>> To: nsrca-discussion@lists.nsrca.org<BR>> Subject: [NSRCA-discussion] Header coupler<BR>> <BR>> Hello all.<BR>> <BR>> I need to tap the collective expertise here on the web.<BR>> <BR>> As some of you know, I've been working on a gas conversion of an OS 160....it is running very well and I'm quite happy with the weight/performance and ease of use. <BR>> <BR>> BUT I'm having a problem with the muffler coupling. <BR>> <BR>> I'm using a Mueller header and an aeroslave carbon pipe.....the header has a 3/4 in outer diameter. <BR>> <BR>> My first coupling material was teflon tubing from McMasterCarr...the "thick walled" 3/4 inch ID tubing...<BR>> <BR>> This held up pretty well as long as I had the space between the coupled pipes very small...but I was getting contact between the pipes (that was the metal "tinging" that you were hearing, Lance)..which eventually caused a burr on the tube and resulted in a hole in the coupling.....So I made the gap a little wider 1/4 inch or so and now the teflon coupler is melting through in a flight or two.....so I need an alternative material.<BR>> <BR>> I remember that we used to use a thick silicone coupling material for helicopter header/muffler connections but I can't find it anymore...Surely someone here has some ideas and a source where I can get it.<BR>> <BR>> Let's hear it!<BR>> <BR>> Thanks in advance,<BR>> <BR>> George Miller<BR>> _______________________________________________<BR>> NSRCA-discussion mailing list<BR>> NSRCA-discussion@lists.nsrca.org<BR>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR></body>
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