TwinTurbo.NET: Nissan 300ZX forum - I'd be careful about too much insulation
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Subject I'd be careful about too much insulation
     
Posted by aliaZ on December 05, 2010 at 10:34 AM
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In Reply To Whats the best way to keep downpipes cool? posted by ZiNnYc on December 05, 2010 at 10:17 AM
     
Message the manifold and turbine housing have a lot of thermal mass. If you get them nice and hot, the heat can no longer escape through normal external convection/radiation, and it has to go somewhere.

The trapped heat will conduct into your turbo CHRA and your cylinder head long after shutdown, which could potentially do some damage. This could be especially disastrous if the CHRA is not water cooled, as is the case with Mitsu and Billett turbos

     
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