emwporsche

what's the word?
I want my intake manifold black as well as my head.
what's the best route?
does thermal coating trap heat in and make it worse off?
or?

like this only black (stolen from streckfu's951)


ps: to get the words porsche to stand out do you just sand the coating off?

evil 944t

The main concern I have heard was the temps needed to cure a head could warp a head and trap heat. Mine was powdercoated and checked, I had no problem.

emwporsche

so if it warps, you're s.o.l.?

evil 944t

well, I would imagine but like I said, Thats what I heard, Mine was fine but I did mine before I got that advice. If I got that advice before my head was done, I would have passed.

emwporsche

so does powdercoating help keep heat out?
or does it get the air hotter?

Mike Murcia

Keep what heat out? Heat from what source? The exhaust? I could be wrong, but the way I see it is that the source of the heat is the combustion of gas, which happens right at the head, so any coating will probably help keep that heat in, or not do anything at all. Theoretically, you could add cooling fins to the head, but unless there is sufficient airflow, they may even act as a heat sink which the coolant has to work harder to keep cool. I could be wrong, but it makes sense to me.

Ski

There have been several discussions on this for the intake - the basic conclusion was 50% wanted raw aluminum while the other 50% wanted powder coating or thermal coating. You can search "thermal coating", "Jet Hot" and there are several topics and several pages.

My .02, I like Jet Hot, I have all the temp data at home on a sheet with laser temp readings before/after, driving time of the car, ambient temps, etc. My intake is coated on the outside only.

evil 944t

I think it will keep in the heat.. ie make it run hotter. Not the other way around.

Scootin159

I'd say thermal coat the intake (inside & out), it will help keep heat from the hot turbo from soaking in. (i.e. an intake is cooler than the air around it)

Powder coat the head so heat can still escape (air outside is cooler), provided you can do so without warping the head. If warping is a serious threat, then just paint it.

emwporsche

" it will help keep heat from the hot turbo from soaking in"

"think it will keep in the heat.. ie make it run hotter."

anyone have any actual data, because they both make a good case

Ski

I can tell you that by Jet Hot coating the intake, outside only, you knock off somewhere between 12-18° on the runners vs stock, the flats in between the runners, only about 6-8°. I have the actual temps written down in front of my turbo supplement manual, be home on Sunday night.

emwporsche

^thank you.

I think I'm just going to thermal coat the intake and the cam tower

any reason not to?

thanks!

dand86951

Powder coating or thermal coating the cam tower won't affect anything to a great extent since the oil inside splashing around on the cam is the primary coolant. The heat transfer due to conducting heat away from the cam tower to the air under the hood will not, in my opinion, be sgnificantly lower if it is Powder coated nor significantly higher if it is thermal coated. So I wouldn't worry about which way you go on the cam tower. For the intake, ideally you would want to insulate the lower half and have a thermal coating that would increase heat transfer on the upper half.

Ceramic coating pistons and combustion chamber and headers does have a positive impact on thermal efficiency.

Charlie944

You might want to look into Swain Tech's BBE coating (Black Body Emitting). It helps draw the heat out of metals, used commonly for radiators, oil coolers, intercoolers and brake calipers. They also can do ceramic coating for combustion chambers, piston tops, etc, along with a varierty of other coatings. I just had my ex. manifold White Lightening coated (even 0.015" ceramic layer) to help reduce ambient temps and keep the in the exhaust for more efficient turbocharging.
http://www.swaintech.com/

evil 944t

I have motor work being done by a highly respected motor shop and He said, powdercoating cam towers can warp too and he has had lifter problems because of it. He said to leave everything bare. If you want bling, polish it.