From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Coating and covering exhaust manifolds
To: lml
Date: Tue, 11 Jul 2006 12:12:35 -0400
Message-ID: <web-1232452@logan.com>
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Posted for "Rod Pharis" <rpharis@teamimc.com>:

Fred,
  
  Your comments are technically correct.  However, you appear to have not
  considered applying the ceramic coating to the tubing ID as well as the OD.
  The manifold CRES wall material should be cooler, and also radiate less.
  That's win-win!
  
  Rod Pharis


...snip...
  
   If you wrap or coat the exhaust manifold, the wall temperature is going to
  be raised, and the strength reduced.  From the figures, we an see that
  100-200F can make huge differences in strength.  The worst thing to do is
  wrap the manifold with high temperature insulation of the type frequently
  sold for automotive use.  I once saw a plane with braided stainless steel
  mesh over the manifold which is fairly bad.  The ceramic coating probably
  has the least effect in increasing manifold wall temperatures, but there is
  still certain to be a negative effect.
  
...snip...