I'm sure that this has been discussed ad infinitum here, but I've been thinking about the wisdom of installing 3 mm apex seals in my engine. I've already got
it built up, but a few people have stressed that the weak point of my engine is the 2mm apex seals. It's a 93 13BREW, but normally aspirated. I'm putting a
2.85/1 redrive on it. Since it's already built with all new stock 2mm seals and all the other oil scaper rings etc, any opinions as to whether I ought to
undertake a conversion to 3 mm seals?

Don't hold back now.

Brian Trubee
RV-4/13Brew/2.85/1

3 mm are good insurance against detonation caused  fracture if you are running  turbo.
If not they are unnecessary.

Paul Lamar

Hey Brian, as a matter of tearing it down or not. I would not. It is my experience that the 2mm will seal better then the 3mm. I chose to put 3mm in my motors because they are turbocharged for the reasons that Paul mentioned. Get your plane done so we have another rotary in the air.:)
Doug Mueller
RX-6 13BT
N900DM
Boulder City,NV

 
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