<VV> Manifold heat soak

[JVHRoberts at aol.com]

I wonder if they actually HAVE been used!! And, are you SURE they are  
exhaust manifolds? Got an Ebay number we can check out?
 
In a message dated 8/4/2007 10:41:41 AM Eastern Daylight Time,  
crawfordrose at msn.com writes:

Maybe  the guy who bought the last set of Eelco aluminum exhaust manifolds on 
ebay  will chime on whether those melted in use.
Crawford
-----  Original Message ----- 
From: JVHRoberts at aol.com 
To:  crawfordrose at msn.com ; virtualvairs at corvair.org 
Sent: Saturday,  August 04, 2007 9:37 AM
Subject: Re: <VV> Manifold heat  soak


If you're talking exhaust manifolds, it simply will  melt. That's why the 
turbine housing is cast iron. 
The reason the  rest of the turbo doesn't melt is there's a heat shield 
between the turbine  housing and the bearing housing, and there's somewhere around 
1/2 a gallon of  oil per minute cooling the thing. 
Of course, the compressor end  gets nowhere neat hot enough to be an issue. 
I have seen melted  turbo cold ends in car fires, however...
There's a reason why no  production cars have aluminum exhaust manifolds, and 
the few marine  applications that do, are water cooled. And they melt when 
the cooling fails.  







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