I never said tins do not direct air flow- I agree. Please do what is right for you. However,
The results of the emission of radiation experiments show: Black surfaces are the best emitters of heat radiation. Black surfaces are the best absorbers of heat radiation. A thin coat of black paint will mot insulate more than it emits. This is not my opinion, it is science. Much smarter people than I have proven this. Ray From: Daniel Moy <[email protected]> To: vintagvw <[email protected]> Sent: Sat, Apr 18, 2015 7:50 pm Subject: Re: [vintagvw] Porcelain coating engine shroud According to your logic the the heat would be dissipated into the engine compartment, and be recirculated on to the heads and the cylinders, I think I disagree. The tins are meant to direct air flow. Why satin black, It was probably the cheapest option to keep the tins from rusting? >From what I remember in general paint acts as an insulator. If you want to >create a surface that cools better then you need to create more surface area >for the air to "flow over." This is why the cylinders are not painted, rust >creates more surface area. On Apr 18, 2015, at 7:15 PM, rayvwbug via VintagVW - Air Cooled Volkswagen Discussion List < [email protected]> wrote: I slightly disagree, While I agree the tin is in fact designed to direct air flow, it is painted matte lack to give off heat. -----Original Message----- From: Dan Moy < [email protected]> To: vintagvw < [email protected]> Sent: Sat, Apr 18, 2015 6:30 pm Subject: Re: [vintagvw] Porcelain coating engine shroud The engine tin is not meant to contain or dissipate heat, it is there to direct air flow over the heads and cylinders. ceramic coating seems like an expensive proposition, I powder coated mine ~5 years ago it still looks great. On Sat, Apr 18, 2015 at 9:26 PM, 'fan2012' via VintagVW - Air Cooled Volkswagen Discussion List <[email protected]> wrote: Dean, Do you live anywhere near Long Island? Rudy LI NY The shinier the surface the more poorly it conducts heat. Dark matte finish is best. Better heat transfer. I don't have any idea how much difference it really makes though. I live in NY and heat is not a big problem if everything is hooked up correctly. Sorry for such a long non-answer, I'm feeling verbose. Dean '71 Super Beetle On Apr 18, 2015 2:10 PM, "Kyle" < [email protected]> wrote: I was wondering more about the thermal properties versus the durability. I know chrome, while it looks cool, actually adds more heat to the equation. The reason why I'm asking is the recent engine fire I guess is an opportunity for me to do something with the fan shroud. I know of a local powder coater in town. I don't know of any local chrome shop or porcelain coating shop. But, if anybody has done this, I thought they might have pointers on it. Kyle -- Visit the VintagVW archives at http://www.mail-archive.com/[email protected] --- You received this message because you are subscribed to the Google Groups "VintagVW - Air Cooled Volkswagen Discussion List" group. 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