<VV> Jet Coatings

[sgang54 at aol.com]

Bob, possible explanation: since the thermostat is downstream of the manifold, it responds to the temperature of the air 
after it has passed both the heads and manifold. Also picks up radiant heat from the close-by manifold as well. 
Ceramic coating appears to reduce that. You might try an infra-red non-contact thermometer to check the surface
temp of the coated/uncoated logs to verify your temperature readings. 

Steve Gangi
disclaimer: I'm not an engineer but I did stay at a Holiday Inn Express 

------------------------------

Message: 3
Date: Mon, 02 Jun 2008 20:21:41 -0500
From: Jack Kean <jkean at sbcglobal.net>
Subject: Re: <VV> Jet Coatings
To: ScottyGrover at aol.com
Cc: virtualvairs at corvair.org
Message-ID: <48449CA5.1040706 at sbcglobal.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

ScottyGrover at aol.com wrote:
>  
> In a message dated 6/2/2008 4:53:56 A.M. Pacific Daylight Time,  
> robovair at sbcglobal.net writes:
>
> What has  hapened is that they seems to coat too well.  When installed on the 
>  car  a 65  Monza  110  4 speed  with a CHT gugage,  they seem to cool very 
> well, my temp stays wasy down below  250.   But if I get up to speed, say 70 
> and hold it there, my temp climbs way  up.  What  I have deduced is that the 
> logs now do not radiate enough  heat to cause the bellows to open, whaich 
> accounts for the temp climb.   As the heat gets bvery high the bellows open, 
the temp 
> drops and the bellows  close then causing the temp to climb again.
>
>
>
> What happens when you remove the lower shrouds entirely? Have you tried  that?
>  
> Scotty from Hollyweird
>
>
>
> **************Get trade secrets for amazing burgers. Watch "Cooking with 
> Tyler Florence" on AOL Food.      
> (http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)
>  _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are the 
property
> of the writer, please attribute properly. For help, mailto:vv-help at corvair.org
> This list sponsored by the Corvair Society of America, http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs 
>  _______________________________________________
>
>   
I have coated manifolds, an engine that I have temperature issues with, 
and the last thing I tried last August (I live in Arlington, Texas), was 
to remove the shrouds. It started taking 10-15 minutes to warm the 
engine up to decent operating temperatures. That can not be a good thing 
for any engine. I parked my car last summer rather than operate it that 
way. I had Corvairs in Houston Texas for years during the 70's and early 
eighties. One thing that was never a real issue was overheating. We ran 
them hard, but as long as everything was functioning correctly, rarely 
had issues with high temperatures.  We had a 65 sedan, 110 hp/pg/AC. We 
called that the "link trainer", because my entire family learned to 
drive in that car (it's also ironic that I have worked for Link Flight 
Simulation for the past 20+ years). Then a multitude of 140 hp coupes, 
which were simply flogged around town. Only time we ever had problems 
was when a belt would separate. We drove those cars all year round. 
Maybe that's wishful thinking balanced by a couple of decades of 
waterpumper usage, but that's how I remember it.

I am very interested in this thread, because it would seem that Bob has 
hit the nail on the head, where all I have been doing is hitting my 
thumb. I will be interested in the results when he switches out his 
manifolds.

j


------------------------------