[Healeys] Ceramic vs. Jet Hot ?

[Neil Anderson]

Alan,

Jet Hot is a ceramic coating or more correctly, a metallic ceramic coating. 
The silver, high gloss ceramic coatings are water based and doubt if they 
coantain any polycarbonates.  The black and grey ceramic coatings are 
usually solvent based.

You may not see too much of a difference of under bonnet heat reduction, 
although that is usually one of the selling points the product manufacturers 
contend.  You would have to conduct heat comparison tests of coated and 
uncoated headers/exhaust pipes under indentical running conditions in your 
Healey to see if you observe any benefit to coated headers.  If you were 
running a big V-8 race car, there would be a noticeable difference, 
especially if the insides were coated too.

The best reasons, I believe, for using cemamic coatings for street cars is 
appearance and not having to recoat them frequently because of the way they 
retain adhesion of the coating at exhaust temps.  The appearance of the 
nicest looking engine bay can be ruined by rusty manifolds and exhaust 
pipes.

Hope this helps.

Neil Anderson
'60 BT7
'59 AN5

----- Original Message ----- 
From: "Alan Seigrist" <healey.nut at gmail.com>
To: "Healey" <Healeys at autox.team.net>
Sent: Thursday, May 22, 2008 11:38 PM
Subject: [Healeys] Ceramic vs. Jet Hot ?


> Hi All -
>
> I just got back a header from Jet Hot and was blown away with the
> finish...and am convinced that thing is coated with enough cancer causing
> polycarbonates to last a lifetime, I am very very please with this.
>
> That being said I know others have coated headers and downpipes with 
> ceramic
> coatings.
>
> My primary concern is heat reduction under the hood -  is Jet Hot the best
> solution or are more traditional ceramic coatings better for heat 
> reduction?
>
> Thanks,
>
> Alan
>
> '52 A90
> '53 BN1
> '64 BJ8
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