so have any of you had engine parts coated by JHB? they are very expensive - im wondering if it is worth it. There is a company called techline that is supposed to be good, you can buy do it yourself coatings for like $30 a bottle. is it safe to use the techline cermet coating (water based) on rotor and side housings? Im thinking about just doing the rotors, is JHB that much better than techline?

 

Go over in the tech and performance section. Theres a long thread on JHB. Yea I saw their stuff as sevenstock last year. Actually the prices are cheaper than new housings. They have 2 different cermets they use. One is VERY $. The other is like $250 a housing?

I looked at techline and some of the other coating places. Dunno if their any good or not for a rotary.

 

i am interested in this also, it looks like there are a few companies working with the coatings. don't know of the diy stuff though.

 

Im emailing me right now with someone from Techline.

As soon as I have something conclusive, I will let you guys know

 

Many shops have used the black satin TBC caoting in the past, i doesn't work on rotors.

The CBX TBC coating will work only if applied properly for a rotor otherwise it will flake off. There are better coating out there that have higher efficiencies such as the one that we use (JHB Engineering).

You do also have to be careful because some of these TBC coatings will actually increase the probability of detonation.

Also if are going to experiment with coatings, don't use your home oven, this is dangerous. Make sure you have an industrial over with proper temperature control or if you are on a budget buy an old used oven and raise the temperature about 25-50F above the cure point.

Good Luck!

 

couture: have you had any problems with high powered boosted rotaries? with housings and rotors coated?

 

Never with the end housings or rotor housings but we did have some problems in finding a proper coating for the rotors, nearly all the coatings we tried during R&D flaked off after time .... this was happening even faster with high boosted turbos.

The good thing about this is that the coating flaking off never damaged a turbo or any of the housings. The downside is that some of the most effective coatings that we have tried didn't last very long at all, they would only be good for race applications.