Jump to content

Painting cylinders


tbd

Recommended Posts

PC would be best though.

440828[/snapback]

 

I'm not 100% sure about this, but I did some reading on another forum where there was proof that PC'ing your cylinders will cause an increase in operating temperature...as much as 15-20 degrees, mainly because of the thickness of the PC and it holding the heat in, rather than dissipating it. :shrugani:

 

If you decide to PC your jugs, I would make sure to beef up your cooling system to accomodate for the extra heat. Just for example, If you're running at 190/200 degrees now, PC'ing your cylinders "could" put you close to overheating...just my .02

 

Here's the thread I was talking about...

 

http://www.yfzcentral.com/invision/index.p...l=powdercoating

Link to comment
Share on other sites

I don't think the pc would matter that much. I know for a fact that guy in the link you posted is wrong about 1 thing. You can annodize any aluminum part. It doesn't matter whether its cast or not. Plus the surface area of the cylinders isn't that great. They don't transfer that much heat. Look at a car or truck, the engine bay doesn't get much air circulation. All the cooling is done through the radiator. I wouldn't worry about it too much, the powdercoat isn't that much of an insulator. For it to raise engine temps by that much, it would have to be significantly cooler than the aluminum its bonded to. By more than the amount the engine temps would supposedly rise.

Link to comment
Share on other sites

i think of all paint, powder coat is the best,,,, for the most part that is, general use. it is durabule, chemical resistant, and can take a few hundred degrees like it aint shit..... and i myself have a p.c. gun, and paint, i did not go that route with my cylinders...

 

i thought i would try out the high temp, 1000* stuff, but brake cleaner ate it off. so i thought since brake cleaner is my favorit of all cleaners, what besides p.c. would be able to hold up to the heat and chemicals... so, of course, the only option was brake caliper paint, they have it in lots of colors, it is made with ceramic to withstand the heat,,, 500* i think. and the gloss red went on quick and easy....

 

just a thought.... good luck

Link to comment
Share on other sites

Paint one cylinder with some high temp black, or powder coating. Put them in the oven at 350. Remove them from the oven and see which cools faster. It will be the black one.

 

Eloss=Econvection + Eradiation + Econduction

 

In a water cooled device, the largest loss of energy or heat, by far, is from convection. The Econvection would be the same between a painted and non-painted cylinder. The Econduction is also identical between painted and non-painted cylinders. This leaves Eradiation. The color black yields the highest Eradiation value, while a shiny mirror finish yields the lowest. Blue, Red, etc fall in between. So, according to the formula and 2 phd physicists in my office, the largest loss of energy or heat would be from painting your cylinders black.

 

Polishing your cylinders is probably the worst thing you could do if you were worried about keeping heat in your cylinders. But even then, it shouldn't matter, because the fact that the cylinders are water cooled, means that the largest loss of energy or heat is controlled by the temp of the water.

Link to comment
Share on other sites

Polishing your cylinders is probably the worst thing you could do if you were worried about keeping heat in your cylinders.

442883[/snapback]

 

That's weird, my banshee ran 10 degrees cooler than normal once I polished my cylinders :huh:

 

Like I said before, I wasn't 100% sure if that information was in fact true. Just wanted to pass on some info I ran across for you guys to take into consideration :cheers:

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...