Date:         Tue, 9 Mar 2004 12:09:31 -0500
Reply-To:     David and Shirin <daveshirin@ENERGYUNITED.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David and Shirin <daveshirin@ENERGYUNITED.NET>
Subject:      EGR valve in 1981 effects cylinder head temps
Content-Type: text/plain; charset="iso-8859-1"

    Well I finally got around to hooking up the linkage to my EGR valve in my 1981 aircooled Westy, actually I made a new linkage because mine has been missing since I bought the van.  When I last had the engine out I cleaned out all the little EGR pipes inside  the intake manifold so I would get a nice even distribution of gas.  Well this van has always run hot for us in the past.  The day before hooking up the EGR linkage, I was seeing Cylinder Head Temps "CHT" (sender under #3 spark plug) of 400 just doing 55mph on leval roads at ambient temps of 60 deg F.  The next day with the same 60 deg weather on the same road I was able to do 65 mph and the CHT was about 375.  Thats a huge improvement, I have never been able to hold 65mph in this van without the temps climbing above 425 which is what I consider the upper safe limit for temps.  
    I knew that EGR would bring the temps down some as it reduces the peak flame front temps in the cylinder and also effetivly lowers the compression ratio but I was not ready for such a drastic improvement.   So now I am only a rolling road block on hills,  :) 

David



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