Alfa Romeo Forums banner
1 - 20 of 20 Posts

·
Registered
Joined
·
590 Posts
Discussion Starter · #1 · (Edited)
Just finished fabricating a set of headers for my v-6 swap, looking for opinion/experience on whether to ceramic-coat them. Space is tight so heat is my concern, although I do like the naked look. If needed, I want to do it before I run them on the engine.
Snake Scaled reptile Reptile Serpent Terrestrial animal

Silver Body jewelry Nickel Jewellery Auto part
Motor vehicle Automotive exhaust Gas Grille Automotive exterior

Motor vehicle Automotive tire Automotive exterior Bumper Automotive exhaust
 

·
Registered
Joined
·
842 Posts
I realize there's a huge upside to minimizing underhood temperatures. What are downsides to coating besides cost? Mainly, does the ceramic coating crack eventually? When I hear ceramic, I think brittle. This is probably a non-issue for seldom use cars, but what about DDs?
 

·
Registered
Joined
·
462 Posts
Check out Engine Masters show on heat wraps on headers vs coated vs unpainted. I think I remember that applying heat wrap to headers was by far the best and ceramic coating and raw were equal in performance. Coat for long term appearance.
 

·
Registered
Joined
·
896 Posts
I have seen headers that have been wiped down on the outside with just eng oil and then run to get hot, lot's of smoke but when they cool off, they have that nice blueish cooked look to them

Thanks, Rick
 

·
Supporting Vendor
Joined
·
4,524 Posts
Stan,

Not all coatings work equally. I've had good luck with Cerakote brand coatings.
 

·
Premium Member
Joined
·
1,032 Posts
Think you should research ceramic coating to be better informed. Its not pottery. Coating inside improves flow, coating outside protects metal n reduces heat in engine compartment. Jet Hot or Cerakote are both well known sources with tons of info on their sites
 

·
Premium Member
Joined
·
2,733 Posts
The primary benefit is cooler underhood temperatures. Many ceramic coaters try to push this off as creating more power due to cooler temps. Engine Masters seemingly blew that theory out of the water. All three yielded little to no performance gain out of any of the thee options. Should take a look at the episode.
 

·
Registered
Joined
·
590 Posts
Discussion Starter · #14 ·
thanks to all. I don't think wrapping is a viable option for me. primaries are very close together, and I went with a slip collector so they come out individually. Will go with ceramic coating, looks like there is a local shop that does it for $200-$275 including prep. Not sure if they are a cerakote shop, but their chromex would be my 1st choice.
Decided to fab my own bundle of snakes for the practice welding. with all the pie cuts, there are 118 individual welds, and still lots of room for skill improvement. Fortunately my time has no value!
Road surface Automotive tire Art Font Electric blue

Automotive tire Rim Beach Motor vehicle Font
 
  • Like
Reactions: Finlandese

·
Registered
Joined
·
4,908 Posts
I had the cast iron headers on my four cyl cerakote and am very happy with them. I did this mostly for looks as every other coating I tried failed, likely because of the difficulty of truly cleaning the cast iron. The shop who did them blasted them and dipped them they sprayed them out. Two years in they still look great.
 

·
Registered
Joined
·
100 Posts
I had the cast iron headers on my four cyl cerakote and am very happy with them. I did this mostly for looks as every other coating I tried failed, likely because of the difficulty of truly cleaning the cast iron. The shop who did them blasted them and dipped them they sprayed them out. Two years in they still look great.
Wow, your headers truly look great! I had mine sandblasted and immediately did the Cerakote ceramic coating myself - but after 1 year some brown spots came through... no drama but yours are way prettier (y)
 

·
Registered
Joined
·
100 Posts
I had the cast iron headers on my four cyl cerakote and am very happy with them. I did this mostly for looks as every other coating I tried failed, likely because of the difficulty of truly cleaning the cast iron. The shop who did them blasted them and dipped them they sprayed them out. Two years in they still look great.
Err... btw, where is your fan? :unsure:
 

·
Registered
Joined
·
4,908 Posts
My fan is a Spal pusher in front of the radiator, managed by a PWM controller.

I too had an E30 and tried using dry graphite lubricant on the headers. It worked until it didnt. With cast iron I believe its all in the prep and coating the inside will help as the materials porosity means stuff inside will migrate outside.
 
1 - 20 of 20 Posts
Top