[NSRCA-discussion] Header coupler

[Jon Lowe]

Find Octura boat couplers.  It is a reinforced silicon tubing that 
lasts a long time, at least on my 1.60 glow engines.  Hard to find, and 
Octura doesn't have a website, but Graves in Orlando carries it.  They 
have both 3/4" and 7/8".  Don't know where to buy it bulk.


Jon Lowe


-----Original Message-----
From: glmiller3 at suddenlink.net
To: NSRCA List <nsrca-discussion at lists.nsrca.org>
Sent: Mon, 1 Jun 2009 5:07 pm
Subject: [NSRCA-discussion] Header coupler










Hello all.

I need to tap the collective expertise here on the web.

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.

BUT I'm having a problem with the muffler coupling.

I'm using a Mueller header and an aeroslave carbon pipe.....the header 
has a 3/4
in outer diameter.

My first coupling material was teflon tubing from McMasterCarr...the 
"thick
walled" 3/4 inch ID tubing...

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.

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.

Let's hear it!

Thanks in advance,

George Miller
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