Re: ceramic coating
#26073
July 27, 2002 08:25 pm UTC
July 27, 2002 08:25 pm UTC
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Joined: Jun 1999
Posts: 571 Hamilton, Ontario, Canada
Ian McDonald
Serious Member
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Serious Member
Joined: Jun 1999
Posts: 571
Hamilton, Ontario, Canada
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Coating only the outside is useless, there is a good article about ceramic coating in this months issue of car craft mag, i'll see if i can scan it.
Ian McDonald 2002 Subaru WRX
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Re: ceramic coating
#26074
July 28, 2002 02:47 am UTC
July 28, 2002 02:47 am UTC
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Joined: Apr 2002
Posts: 1,449 Toronto/LA
Steve Marton
Member
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Member
Joined: Apr 2002
Posts: 1,449
Toronto/LA
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Hmm, I would think it's not useles, if the coating has any heat insulating/reflective capabilities at all. If you keep the heat inside the metal and in the inside passage, you're as good as if you kept it in the inside passage only. But if you have a good point against that, I wanna hear it.
I don't know much about the properties of these ceramic coatings so it's only theorizing...
Black 91 TSI FWD
"DSM: Making mechanics out of normal people since 1989"
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Re: ceramic coating
#26075
July 29, 2002 08:26 pm UTC
July 29, 2002 08:26 pm UTC
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Anonymous
Unregistered
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Anonymous
Unregistered
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According to Maximum Boost (the book), coating parts of the exhaust (even outside) improves the velocity of the exhaust gases, maximizing flow. As far as I remember, velocity is mostly influenced by the difference of temp between outside and inside of the pipe/exh/O2/etc. I don't have the book with me but I could elaborate on this later tonight.
Also, I guess that since your part (let's say O2 housing) is more insulated, the metal will chill down more slowly, preventing exessive stress on the part. I guess if it gets hot, then cold, then hot.. on and on, that's what make it crack (besides wall thickness for 1G exh many..)
Pierre M 91 Talon Tsi (paint job starting tomorrow !!)
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