<VV> Jet Coatings

[FrankCB at aol.com]

Bob,
    It's hard to believe that a Corvair engine running  at 70 mph doesn't 
develop enough heat in the heads and cylinders to heat up the  cooling air enough 
to keep the bellows doors open enough to keep the CHT  showing a reasonably 
steady temp.   Are you sure that you don't  have a leakage of cooling air 
someplace else, say through the ducting leading to  the passenger heating?
    If coating the outside of the exhaust manifolds  reduces the heat load SO 
much, they why do we even NEED to consider  electric fans or adapting Porsche 
fans or all those other schemes that  we heard about for keeping our Corvair 
engines from  overheating?
    Frank "full of questions"  Burkhard  
 
In a message dated 6/2/2008 7:53:56 AM Eastern 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.


I had the logs coated on the outside, the intent was to keep the  heat inside 
the log and push it out through the exhaust.  It apparently  does that so 
well, not enough heat is there to open the  bellows.

Bob Bauer







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