The ceramic should flow better also because there is less heat loss in
the pipe. As the exhaust cools, it slows down. Can't say I fully
understand this as the math behind gases is about as chaotic as it
can get, but I have heard time and again that you want good velocity
of exhaust gas and the less cooling the better, in general.
Of course there is such a thing as too much flow which can result in
over-scavenging of the cylinders, but the underhood temp
reduction you mention is worth designing the rest of your mods
around the flow rate of a ceramic coated so as to prevent over
scavenging. This would include intake choices, cats, mufflers
etc. I plan on getting more expert opinions when the time comes
but I think the main thing is that I "open up the intake end" to the
same degree I "open up the exhaust end" because scavenging
is mostly a function of the intake resistance being too high
with regards to exhaust resistance (backpressure)
When I feel comfortable with my dealer (with regards to my
warranty etc) I plan on going ceramic coated.
Later,
Marty
'00 CC 4.7L auto
Brett Forehand wrote:
> Hey Ron, I've got chrome headers too, and yep, they're blue. The only way
> that I know of to keep chrome from turning blue is to never start your
> engine! (Heat is the culprit).
>
> Ceramic coatings seem to hold up and look great too. (Jet-Hot is one that I
> have heard of). Mike Clark has coated headers, but I'm not sure of the
> make. They have kind of a silver hue to them, almost a semi gloss. The
> benefit you get from them is heat reduction under the hood. Mike was
> showing his off to me at the Texas DML meet, and hadn't had his engine off
> for very long, and the headers were already cooled down.
>
> I plan on adding ceramic coated headers to my truck, eventually.
>
> Good luck!
>
> Brett Forehand
> '94 Dakota CC Sport
> ________________________________________________________________________
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