Re: Coatings

["Mike Hopton" <mike@genesis-microchip.on.ca>]

     Not sure I follow Scott's argument. As I understand, my engine runs a 
     lot hotter during spirited driving and it's this peak heat production 
     that's a concern. Coating the EM helps transfer this heat further 
     along the exhaust system. As you insulate more of the system e.g. 
     turbo hot side and down pipe you can help transfer this heat further 
     from the engine? The exhaust gas speed is maintained (probably higher) 
     because the inside of the manifold and pipes are insulated, and hotter 
     than they would be without the coating.
     
     > *  Heat coating works well when the engine is running, increasing 
     > the exhaust velocity.  When an engine stops running, that coating 
     > becomes an insulator. Given the exhaust and underhood temps, not 
     > sure I'd consider the heat coating a great thing. 
     
     On shutting off the engine the properties of the coating don't change?
     
     I agree that a coated (insulated) manifold will reduce the heatsink 
     effect after shut down BUT the system should be cooler to begin with? 
     
     With a reasonable wind down period it seems like a good idea to me.
     
     Regards, Mike