Hi Paul, I'm Rick in Denver and it's time to get in this century. I've
located several 13b's around town and wondered if they are still
acceptable for conversion as of today. I have the conv. manual coming
with the tape but haven't been up to speed with the rx8 13b. Your
information is awesome and thanks in advance for any help. The eng will
be going in my Wittman Tailwind. Best, Rick

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Anything from 1989 up is good. Even better is 1992 to 2003.
Most of those engines come from Japan.

The six port RX8 engine is OK but the jury is still out on
P-porting an RX8 engine. You probably would need earlier rotor
housing with the P-port exhaust as well but that is not cast
in concrete yet.

The intake manifold is actually easier to make for a P-port engine
as it consist of two 180 degree 2" tube bends and a slide throttle.
No complicated transitions from oval ports to round tubing.

Paul Lamar ...No rotor no motor.

Paul

As you know I want to P port my 1990 13B. and try to get close to 300 out of
it.  Are there significant advantages to the 1992 and up models?  I would
like high comp. Renesis rotors for my choice of fuel but you mentioned
something about the apex seals concern over the P ports.

Doug in Japan

The end housings are stronger. I think somebody has already
cracked a pre 1991 due to detonation.

Paul Lamar ...No rotor no motor.

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