Re: [anzhonda600owners] Re: [2cylinderhondas] High temp spray paint

misterpoopoohead · Post by **misterpoopoohead** » Tue Jul 19, 2011 8:32 pm

Honda 600's don't have modern motorcycle engines and they are in an enclosed space.
Again, I'm not saying you shouldn't paint your cylinders. I'm saying that I wouldn't paint mine. ;o)
Kev
Sent from my Verizon Wireless 4GLTE smartphone
----- Reply message ----- From: "Dave Rulez" To: Subject: [anzhonda600owners] Re: [2cylinderhondas] High temp spray paint Date: Tue, Jul 19, 2011 4:08 am
Im of the mind that most current motorcycle manufacturers sell bikes with completely painted engines, if this is such a potential problem why would they do it? Just my .02
Dave

--- In
anzhonda600owners@yahoogroups.com
, wrote:
> Disagree, Hirsch Automotive has a paint I like to use on all exterior parts Empt-16A, they call it Space Age Bright Aluminum. An 1800 degree formula withstanding all weather conditions. It does not fully cure until the engine heats up. I have one engine that is 10 years since painting and it still looks fresh. I have noticed no over heating. See a picture of one in the ANZhonda600owners group site, the last page photo album.
> Bill
> -----Original Message-----
> From:
2cylinderhondas@yahoogroups.com
[mailto:
2cylinderhondas@yahoogroups.com
]On Behalf Of Kevin Lister
> Sent: Tuesday, July 12, 2011 2:16 PM
> To:
2cylinderhondas@yahoogroups.com
> Subject: Re: [2cylinderhondas] High temp spray paint
> Johnny,
> What are you planning to paint?
> I wouldn't paint the cylinder as paint on that can hinder the cooling process.
> kev
> --- On Tue, 7/12/11, johnny.siu@... wrote:
> From: johnny.siu@...
> Subject: [2cylinderhondas] High temp spray paint
> To:
2cylinderhondas@yahoogroups.com
> Date: Tuesday, July 12, 2011, 2:11 PM
> I want to clean up my engine and spray paint it.
> Can anyone recommend a good high temperate sliver/chrome spray paint?
> many thx

brad fenn · Post by **brad fenn** » Tue Jul 19, 2011 9:09 pm

Copper radiators were always painted black. I read that the matt black paint used on them was a special paint that dissipated the heat much faster than regular paint. And they were painted to keep them from oxideing. So is there something to this painting? I painted my 600 engine black and polished the cylinder fin edges as I will be showing it and it really looks great, but also plan on doing some racing after a cross country trip. I will be running head temp gauge on mine as it is has a turbo.

misterpoopoohead · Post by **misterpoopoohead** » Tue Jul 19, 2011 11:30 pm

Sounds like it looks killer! Can u snap a pic and share?
Kev
Sent from my Verizon Wireless 4GLTE smartphone
----- Reply message ----- From: "brad fenn" To: Subject: [anzhonda600owners] Re: [2cylinderhondas] High temp spray paint Date: Tue, Jul 19, 2011 9:08 pm
Copper radiators were always painted black. I read that the matt black paint used on them was a special paint that dissipated the heat much faster than regular paint. And they were painted to keep them from oxideing. So is there something to this painting? I painted my 600 engine black and polished the cylinder fin edges as I will be showing it and it really looks great, but also plan on doing some racing after a cross country trip. I will be running head temp gauge on mine as it is has a turbo.

Lyle · Post by **Lyle** » Mon Jul 25, 2011 10:07 am

Interesting info!
Jim, posted some very good info (see below) too high tech for me :)!
I also see both sides.
I machine heat sinks for a military application. Some are machined and some are cast. According to tests, the cast is the best heat sink because the surface is rougher and has lots of pits, peeks and valleys, meaning more surface area. To keep the aluminum from oxidizing they clearcoat anodize the surface, I have never seen them painted.
My racing Go-Kart engine is as cast, no polishing, no coatings, but kept clean and free of any dirt and oxidation. None of the top teams coat the fins.
As far as my Honda Coupe engine I rebuilt, I cleaned it well, but did not paint it.
It does not look as nice as Bill's engine, it's discolored and kind of dirty looking, from baked on grease and oil. And Bill's engine will stay cleaner and look better for years.
If I was going to paint it, I would use a paint like Bill used.
High temp, which has lots of aluminum/metal particals in it. A thin coat so it doesn't fill in all the cast roughness. A thin coat will probably not affect heat transfer much, can it even be measured?
But, I still think the as cast, uncoated is a better heat sink.
But, then Bill will beat me at a car show.
:(
Lyle

--- In
2cylinderhondas@yahoogroups.com
, "usaf_res_ret" wrote:
I could see both sides in the discussion on painting engines. So I
decided to look up the emissivity coefficient, how well it radiates
heat, of paint.
For everyone not familiar, a "black body" both absorbs and radiates heat most efficiently. An "emissivity coefficient" of 1.0 is assigned to black bodies. Everything else will be less a less efficient radiator and will have a an ε value (emissivity coefficient) less than 1.0.
Shiny surfaces are less efficient radiators than dull. Of course there
are paints with special insulating properties that slowdown the transfer of heat energy, but we're not talking about those special cases.
Emissivity does vary some with temperature, but here are a couple of
websites with emissivity coefficients for 300 degrees Kelvin,
approximately 81 F:
roliv.com/emissivity-values-definition-and-coefficients
wrote:
> Copper radiators were always painted black. I read that the matt black paint
> used on them was a special paint that dissipated the heat much faster than
> regular paint. And they were painted to keep them from oxideing. So is there
> something to this painting? I painted my 600 engine black and polished the
> cylinder fin edges as I will be showing it and it really looks great, but also
> plan on doing some racing after a cross country trip. I will be running head
> temp gauge on mine as it is has a turbo.
> From: "misterpoopoohead@..."
> To:
anzhonda600owners@yahoogroups.com
> Sent: Tue, July 19, 2011 10:32:13 PM
> Subject: Re: [anzhonda600owners] Re: [2cylinderhondas] High temp spray paint
> Honda 600's don't have modern motorcycle engines and they are in an enclosed
> space.
> Again, I'm not saying you shouldn't paint your cylinders. I'm saying that I
> wouldn't paint mine. ;o)
> Kev
> Sent from my Verizon Wireless 4GLTE smartphone
> ----- Reply message -----
> From: "Dave Rulez"
> To: Subject: [anzhonda600owners] Re: [2cylinderhondas] High temp spray paint
> Date: Tue, Jul 19, 2011 4:08 am
> Im of the mind that most current motorcycle manufacturers sell bikes with
> completely painted engines, if this is such a potential problem why would they
> do it? Just my .02
> Dave
> --- In
anzhonda600owners@yahoogroups.com
, wrote:
> > Disagree, Hirsch Automotive has a paint I like to use on all exterior parts
> >Empt-16A, they call it Space Age Bright Aluminum. An 1800 degree formula
> >withstanding all weather conditions. It does not fully cure until the engine
> >heats up. I have one engine that is 10 years since painting and it still looks
> >fresh. I have noticed no over heating. See a picture of one in the
> >ANZhonda600owners group site, the last page photo album.
> > Bill
> > -----Original Message-----
> > From:
2cylinderhondas@yahoogroups.com
> >[mailto:
2cylinderhondas@yahoogroups.com
]On Behalf Of Kevin Lister
> > Sent: Tuesday, July 12, 2011 2:16 PM
> > To:
2cylinderhondas@yahoogroups.com
> > Subject: Re: [2cylinderhondas] High temp spray paint
> > Johnny,
> > What are you planning to paint?
> > I wouldn't paint the cylinder as paint on that can hinder the cooling process.
> > kev
> > --- On Tue, 7/12/11, johnny.siu@ wrote:
> > From: johnny.siu@
> > Subject: [2cylinderhondas] High temp spray paint
> > To:
2cylinderhondas@yahoogroups.com
> > Date: Tuesday, July 12, 2011, 2:11 PM
> > I want to clean up my engine and spray paint it.
> > Can anyone recommend a good high temperate sliver/chrome spray paint?
> > many thx