Got a minus 30 point for missing engine tin

rcb78 · Post by **rcb78** » Thu Apr 28, 2005 2:59 pm

Try this on for size. Chrome, silver (light, reflective colors) reflect the heat back to the engine. Heat radiation and heat convection are two different things. Hmmm, I wonder why VW offered the 'artic' trim (or whatever it was called) with chrome valve covers and sump plate in colder climates,,,, maybe it was to help the engines run hotter in colder places.
Here's something else to think about for awhile. You painted that stuff on so thick I can see some serious orange peel effect in it. Last time I checked 'real' thermal coatings are supposed to be applied in thin coats so that the thickness of the coating doesn't negate your gains.
Oh, and you mentioned it was used on your exhaust. People ceramic coat or thermal wrap the exhausts because it's best to keep the heat 'in' to maintain exhaust velocity. So either that stuff was designed to retain heat, or dissapate heat, but not both.
Last thing, is this 'expert' VW mechanic the same idiot who told you to use 140wt gear oil because it's sunny outside? You need to make some new (smarter) friends. Have I mentioned I used to be a design engineer for Porsche? Well maybe not engineer, but I was a master mechanic. Well maybe not mechanic, but I did work at a dealership. OK nevermind, I rode in one once when I was kid, but I know what I'm talking about because I'm older than you and you're impressionable. Maybe you should listen more to the people who've been in the hobby for the last few decades and less to the people who worked on the cars decades ago. --Ryan

sagaboy · Post by **sagaboy** » Thu Apr 28, 2005 5:10 pm

<…why VW offered the 'artic' trim (or whatever it was called) with chrome valve covers and sump plate in colder climates…>
It’s just hear say with no proof of truth--on the assumption that it is true--vw took great pain to sandwich asbestos between those tiny little 2 heat shield tin covering the heat riser connected to the exhaust—those artic chromed tins could have heat retaining stuff sandwich between chrome—but if they are just plain chrome—well, in the management of retaining heat at the sub-automatic level it does help—hummmm…I wonder why NASA don’t chrome their space craft or Eskimos didn’t wear chrome suit—perhaps only works on aircool.

<….You painted that stuff on so thick I can see some serious orange peel effect in it.>
Oh that… because that piece of iron is rusted and partly due to the thin coat of special silver paint designed to let it the rust peel off.

<.… So either that stuff was designed to retain heat, or dissapate heat, but not both.>
Neither… designed to keep rust off on very hot surface without being burned-up in the process.

<…. is this 'expert' VW mechanic the same idiot who told you to use 140wt gear oil because it's sunny outside?>
Expert are just as human as anyone else like those in the hobby for the last few decades--they age, have memory relapse, live in the past and loose touch with the 21st century--it’s best not to take everything spooned-out for granted but wise to use those gray matter between our ears at the same time… No offence meant guys…OK

)

A documented factual tale
In the African out-backs--sick villages go to the witch doctor for help and the witch doctor will use a quarter inch tip heated hot iron and burn the patience forehead—then ask—are you still sick—the patience screaming; no but my head burning like hell.

Hummmm… I think my tranny pain got transferred elsewhere…. LOL

500LbGorilla · Post by **500LbGorilla** » Thu Apr 28, 2005 6:06 pm

Lordy help us all - there are two of them.

rcb78 · Post by **rcb78** » Thu Apr 28, 2005 6:34 pm

If you knew the materials properties for chrome you'd feel a little dumber for the NASA comment. Do you have any idea how much heat those tiles are submitted to? And on that note, ever heard of mylar? A silver mylar sheet is also known as a 'space blanket' if you're in the right group of people. Hmm, wonder why people would consider something so thin and flimsy to be a blanket or use it to cover a shelter... often in true Arctic/Antarctic climates. Feeling like you know a little less now? Eskimos don't wear mylar suits because they have nice comfortable furs to wear that actually breathe. Wearing a plastic would be like sitting in a sauna, you'd sweat like crazy, very dangerous in extreme climates. Come on man, common sense.
As for sandwiching a thermal barrior between the chrome and the metal,,, yeah, right, keep dreaming. Cost effective anyone?

Painted over the rust did ya? Well that was a huge mistake for heat dissapation. You just insulated them even further. Paint designed to let the rust peel off??? Are you reading this stuff as you write it? And if the paint is only designed to prevent rust from occuring, then it has no business being on any part of your engine that needs to shed heat. Which pretty much means the exhaust is the only place it should be.
Oh, and either you either just did some serious backpedaling, or you're making things up as you go to sound more important. Explain these two statments. --Ryan

sagaboy wrote:That?s special silver paint given to me by a friend from ICI paint test unit?this silver paint conducts and dissipate heat? I have even applied it onto the muffler?excellent stuff?welcome to the 21st century )

rcb78 wrote:So either that stuff was designed to retain heat, or dissapate heat, but not both.

sagaboy wrote:Neither? designed to keep rust off on very hot surface without being burned-up in the process.

rcb78 · Post by **rcb78** » Thu Apr 28, 2005 6:39 pm

One more little side note. The reason your engine probably doesn't overheat is because mechanically it's in sound working order and the ACVW engine is very, very forgiving in stock form. Face it, you have no clue how hot/cold that thing is with no gauges. And no, taping a turkey thermometer to the case does not count, just like saran wrap does not count as a condom. --Ryan

sagaboy · Post by **sagaboy** » Fri Apr 29, 2005 12:51 am

I am enlightened.

steve253 · Post by **steve253** » Fri Apr 29, 2005 1:57 am

rcb78 wrote:One more little side note. The reason your engine probably doesn't overheat is because mechanically it's in sound working order and the ACVW engine is very, very forgiving in stock form. Face it, you have no clue how hot/cold that thing is with no gauges. And no, taping a turkey thermometer to the case does not count, just like saran wrap does not count as a condom. --Ryan

So THATS how I got her pregnant!! Nah....the kid don't look anything like me, except we both are missing our teeth. Well maybe...

Haridev M · Post by **Haridev M** » Fri Apr 29, 2005 6:37 am

hi guys again....i wanted to ask, why is it that engines in almost all cars in the 80s and early 90s are the colour of aluminium or in other words silver? why dint they colour code them black since then? another thing sagaboy, the reason why henry ford painted the model Ts black is because it dries faster than and other colour. not because of any heat factors. anyway, i finally decided to paint the engine black after much thought.... too many questions that have made me start to think...regards,dev

rcb78 · Post by **rcb78** » Fri Apr 29, 2005 6:21 pm

Possibly because they all have nice big radiators and don't really care about heat dissapation through air cooling.
Not painting the bare aluminum and purposely painting something silver, that's two completely different things. --Ryan

Guest · Post by **Guest** » Fri Apr 29, 2005 7:05 pm

sagaboy wrote:For metal to *radiates* heat it must first absorb heat
therefore, the idea of using black is its properties/ability to absorb heat wavelength?hence, black paint act as a heat transfer agent to the metal tins for dispersion--therefore, a running engine heat gets dispersed by forced air flow.

of course it's going to absorb heat, it's an engine case! you know..engines..combustion...fire..HEAT. The temperature on the inside is much more than the air flowing over it. Thus the "cooling" effect.

black will keep it cooler. period. That's science

Haridev M · Post by **Haridev M** » Sat Apr 30, 2005 11:23 am

makes lots of sense. neway decided to keep the fan box and air filter silver. rest gonna be black. all the way. so i guess the germans knew what they were doing. regards,dev

sagaboy · Post by **sagaboy** » Sat Apr 30, 2005 7:32 pm

<... so i guess the germans knew what they were doing. regards,dev>
“Hitler” was a die-hard fan of “Ford” and always wanted to emulate “Ford”people’s car mass production—more like he (Hitler) took “Ford” word “You can have any color as long as it is black” and ordered his engineers to blacken everything in the aircool engine… LOL

rcb78 · Post by **rcb78** » Sat Apr 30, 2005 9:46 pm

Well there you have it everyone, right from the horse's mouth. Sagaboy is right because Hitler was a dumbass, finally it all makes sense. --Ryan

Sharkey · Post by **Sharkey** » Sat Apr 30, 2005 11:28 pm

Glenn wrote:
sagaboy wrote: <Glenn said: Painted pushrods tubes?>
I have seen factory fitted original chromed ones too!
Stainless steel

Glenn, please don't tell me that your traction bar is supporting your engine via your sump (and not the case itself)?

sagaboy · Post by **sagaboy** » Sun May 01, 2005 12:42 am

<...Hitler was a dumbass...>
Dumbass is pretty mild for a person that got 6.5 million innocent people murdered.