It seemed their was a clearance issue when installing the Renesis rotors
 in a 13B engine.  Do you recall what it was?  I think the gears, and
 bearing may be different as well.

 Doug in Japan

 News to me.

 Paul Lamar



Paul,

I'm planning on using Renesis 10:1 rotors in my p-port 20B.  As I understand
it, I will need to cut the apex grooves deeper to accept the 13b/20b apex
seals, and use only one of the oil scraper rings.  And of course, have the
assembly rebalanced.

Mark S.
Austin

http://www.rotaryeng.net/history.html

Why not run stock low height RX8 apex seals? They have less weight than 13B
seals so they will follow variations better. Also the RX8 corner seals
have a very low friction Diamond Like Carbon coating. DLC should be
applied to all the seals but I think Mazda choose only the corner
seals to keep the cost down. Seal friction has a significant affect
on engine efficiency. Particularly at the higher RPM ranges we run.

Paul Lamar