Jim,
In a sealed "black box", you'd be correct, the system would eventually
reach equilibrium. However, the ceramic coating reduces the RATE of heat
transfer from the hot exhaust gases to the relatively cool (kewl?) air
flow in the engine compartment. The engine compartment receives less
heat per unit time, so it is relatively cooler. Same concept as wrapping
foam insulation around your air conditioner tubing.
As for power increase, since less energy is transferred, the exhaust
gases stay hotter, so they flow a bit faster and that helps scavenging.
Bugz
-----Original Message-----
From: tigers-bounces+mark.rense=ge.com@autox.team.net
[mailto:tigers-bounces+mark.rense=ge.com@autox.team.net] On Behalf Of
Jim Parent
Sent: Tuesday, September 23, 2008 9:07 PM
To: tigers@autox.team.net
Subject: Re: [Tigers] (no subject)
I could understand heat resistance but how does heat reduction work?
I can see how a coating could delay heat transmission but eventually (it
seems to me a second or two) the heat would get through raising the
exterior (of the header) temperature to what it would have been with no
coating.
I do have my headers coated and they look great but I'm unclear if or
how they reduce the temperature under the hood.
I have never understood the idea of temperature reduction but I get that
ceramics increase heat resistance.
Jim
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