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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: Closed Air Plenum for TSIO550
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Date: Mon, 21 Nov 2005 21:06:47 -0500
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Posted for "Bryan J. Burr" <bjburr@mwheli.com>:

  After talking with Andy the plenum makes a more efficient use of the
  cooling air.  Then inlets can be reduced thus eliminating drag.  The
  greatest benefit is to eliminate most of the sheet metal and baffeling
  material, reducing cylinder head temps and oil temp, without reducing
  power.
  
  I am proceeding to the design and production stage on this for my ES.
  Should be the same as a IVP as the cowlings are the same if the TSIO550
  is used.
  
  Bryan

  >    any idea what the performance improvement is for adding that?