I have these 1 peice seals with 1 spring, and am wondering who made them??? They are atleast 3 years old. Some of the items say RB, some say mazda, and the rest like the seals were in unmarked bags.

Pics below!

 

I just looked at the Mazdatrix site and trhe only non-ceramic, 1-piece seals they have are carbon, which are said to be unsuitable for turbo applications:
http://mazdatrix.com/b3.htm

I am not sure how to tell if yours are carbon seals or not, but perhaps someone with more experience can chime in with some method to make that determination.

-Max

 

The 11015 written on the springs leads me to believe I have a set of 2 MM Carbon seals. Do many people use these seals? I dont think I will use them in my rebuild.

 

No one knows anything else about them?
Why cant they be used for Turbo apps? Too soft? (im researching now).
Thanks!

 

Racing Beat says:

Aluminum-filled carbon seals are well suited to high RPM, normally aspirated engines. They are moderate in price and are very reliable. They do not seal as well as the multi-piece cast iron seals -- especially at low RPM -- but this is not very important in the 8,500 to 10,000 RPM range. The fact that they are the lightest seal available allows the carbon seals to stay on the rotor housing surface very well at high RPM. We do not recommend carbon seals for use in turbo applications, because we believe they are too fragile in the event of detonation.

Racing Beat part numbers:

11015 : 86-92 non-turbo springs
11011 : 86-92 non-turbo 2mm apex seals

-Max

 

Well I was digging around the shop today and located the box everything came in.....

Racing beat Race rebuild kit 89-91 . Helps to read :-p.