Thermal coatings

[Ray Drouillard]

> Second, exhaust headers. Disregarding turbocharged engines, I see little
> gain here. Less heat transfer would result in higher gas velocity but
> also higher BP, meaning you simply have installed a smaller diameter
> pipe?? Some webvertisements say less friction at the pipe walls hence
> better laminar flow. This must be a joke right? The exhaust flow is a
> fully developed turbulent flow isn't it?

If nothing else, it'll keep your engine compartment somewhat cooler.  That
ought to be worth something.

I have seen "header wraps", so someone must believe that it is worthwhile to
keep the heat in the headers.


Ray Drouillard


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