Ceramic coating inside of manifold

[Romeyo07]

I just picked up a tubular manifold and am sending it to get ceramic coated. I was told that if I ceramic coat the inside as well that I should see a difference in horsepower. I was then told that there have been stories of ceramic coating on the inside of the manifold possibly causing problems with the turbo.

Can someone please clarify if they've heard of this issue with ceramic coating the inside of the manifold and it's gains, if any. Thanks!

 

[agentorange313]

I cant say anything about horse power gain, although in theory yes we should net more horsepower with having components ceramic coated (some parts more than others), but all the parts I have had ceramic coated have been inside and out.

I have had it down by a couple of companies so far, GSD powercoating here in Jersey, and Bonehead Performance, they both have ceramic coated the inside and out of the part. I had my FP manifold, o2 housing, and turbine housing call coated.

 

[talonDSMerr]

Considering how some ceramic coatings hold up on the outside of exhaust manifolds, and how difficult it is to properly prep the inside of tubular manifolds, the possibility of some of the coating flaking off and getting eaten by the turbine steers me away from having the inside coated, no matter how much benefit it offers.

 

[DSMunknown]

I've never actually seen any evidence that show gains. Anyone have links?

 

[Boosted98gsx]

I would recommend you do not coat the inside of the manifold. Over time, the carbon build up will be a good enough insulator, and ceramic will flake off over time, possibly damaging your turbine wheel.