Toymods Car Club Inc: Tech & Conversions => HPC coatings - advantages-disadvantages

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oldcorollas
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Kita-Ku, Sapporo, Japan
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January 2003

Re: HPC coatings - advantages-disadvantages - benifits	Thu, 17 July 2003 04:37

the exhaust gases are hotter.. than they would be without the coating. heat is lost from the gas to the extractors, whereas with the coating, this loss is reduced. hmm, interesting point, from what i know, cat material works best around 400 deg C, and above that their efficiency decreases.. (well, the thermodynamics of the reactions work against efficiency, the actual platinum catalyst still works) i'm not too sure on the max temp, but it is around 6-700deg C. the lower the temp, the longer it lasts, but more heat is generated in the cat when their is a rich mixture, since the fuel then burns inside the cat!!! i'd be more worried about rich mixtures than retained heat from coatings... HPC... High Performance Coatings? only australian distributor for HPC is in Victoria. are there other mobs that do as good work?? maybe a good time for a holiday to Vic how long do they last?? a mate of mine has a set of 20 year old extractors on his racing KE15. i don't know who coated them, but it is still in almost brand new nick... the reduction in temp is such that you can hold your hand very close to the pipes when the engine is running, and after it shuts down, you can touch the extractors after a few minutes, and the are much cooler than the end of the exhaust pipe!! Cya, STewart [Updated on: Thu, 17 July 2003 04:40] [Report message to a moderator]

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