We have started doing cryo treating to the internals of the engines we rebuild if the customer so requests it. It doesn't really cost that much for the added strength and longevity of the parts treated. We can do the Apex seals, springs, side seals, springs, corner seals, springs, and oil control rings for $150 and the rotor housings for $100 each. That is what we are charged, and therefore that is what the customer pays for the treatment. We don't make anything on it, but I think it is a really good thing to have done. We are doing it tot he 13B-REW engine that we are doing for Loi, who is the owner of SportCarMotion.com On other rotary engines that have had this treatment locally that were used in sand rails, there was approx a 30-50% increase in longevity on their parts. The housings still looked near new when the engines were gone through (they were rebuilt just to see wear) I looked at his data that he has aquired over the years, and we were sold. I know that alot of people use that treatment for brake rotors and so forth, so it seemed like a good idea for engine parts as well. We shall see :bigok:

 

sounds good !! maybe i'll do that if i get a spare engine

 

Sweet! I'll keep that in mind for when I rebuilt one.

 

I noticed that you don't mention doing the rotors. Why is that?

 

very cool

 

We could, but the rotors don't touch the surface of the engine housings so there really isn't a reason. We could do them I am sure. I guess it could help with seal wear in the rotor grooves. Probably would cost around what it does to do the housings.

 

I have been hearing a ton about the cryo treating, I should do it on one of my tranny's when I finally get them in. Just take out all the parts and send them to you or something.

 

Wonder if it would help the rotors and housings withstand the apex seals gouging them when they break. For that to work the seals probably shouldn't be treated though cause that would just harden them?

 

that's about the only thing my engine didn't have done to it.

 

I wondered the same thing myself a while back, check it out.



http://www.rx7club.com/forum/showthread.ph...t=cryo+and+apex



Kyle