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Re: Thermal Coatings

On Tue, 18 Apr 1995, Robert D. Houk wrote:

>    Never ever never ever wrap cast exhaust pieces unless you want to replace 
>    them.  I also would think long and hard about the risk to the turbo 
>    verses the gain in hp concerning wrapping it also.  I raced a 2.3l ford turbo
>    (no flames, it was and is a powerhouse of an engine with a bullet proof 
>    bottom end.  It also has not dropped any valves unlike my audis have) 
>    from 85 to 88,  I could not tell any improvement or turbo response.  It 
>    helped to cook the bearings fairly quickly and sometimes I would notice 
>    hairline type cracks on the exhaust outlet of the turbo.  I would try to just
>    insulate the air intake from the engine heat and pursue other hop ups.  
> How about wrapping the *intake* side of the turbo to insulate it from the
> heat of the exhaust system, thus keeping the intake charge cooler and
> denser? (That's what I originally meant when I asked about "wrapping" and
> insulators...)
> 					-RDH
That would help and could not hurt anything except cold running 
possibly.  Some cars have a coolent pipe running through the intake to 
warm it for emissions I believe.  But anything to have a cool dense 
intake will help performance.