Greetings Rotarians,
I'm new to the group so forgive me if this has been covered previously.
I want to put a Bruce Turrentine built RX8 in my Glasair Aviation
Sportsman.  Will likely use Tracy's prsu & ecu, Fred Breese's mount.
Bruce removes the oil injection system and relies on premix 2-cycle oil
instead.  Theoretically, premixing should obviate many of the current
recall problems, but how do I know the recommended ratio is valid?  Any
thoughts/comments on this would be appreciated.  Also, why are Renesis
conversion builders changing the oil pans?  Is it a cowling space issue?
Anyone in the group made a low profile intake for the Renesis that could
give me some pointers?
In trike configuration my plane's fine with 190-200 HP so I'm not
planning any performance mods for now.  But a few years down the road
when I switch to amphib floats, I'd like to investigate turbo
compounding.  What's the current status on this?
Alex Rose
Sportsman kit #7032

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Just don't let Bruce put in any after market apex seals in there.
Use stock Mazda apex seals only.
http://www.rotaryeng.net/seals.html

Also put in Teflon encapsulated oil O-rings in the oil scrapers
as I think that is the cause of the current RX8 recall. I suspect
the side exhaust ports have caused the rotor temperature to  increase
and the old oil O-ring seals are not up to it.

I don't recommend Fred Breezes mounts for several reasons.
First; they are more expensive and heavier than necessary.
He starts with an expensive and heavy slab of aluminum and
NC mills out most of it. NC milling machines are expensive and
they must be paid for. However they are very pretty parts with
anodizing and powder coating.

Two; the front rubber bushing are too close to the exhaust and the
rear rubber bushing are going along for the ride. The front rubber
bushings are taking 90% of the load. There is twice the opportunity
for the oil to leak around the pan gasket as there are now
two pan gaskets, one on each side of the plate.

You could build your own and save $1000 or buy one from Jerry Hey
and send it out for powder coating.
  http://www.rotaryeng.net/motor.html

We are still working on turbo compounding but I am saving up money
for the next stage which is testing on a dyno. Hopefully there
will be an article on it in Flying Magazine soon by Peter Garrison.

Paul Lamar ...No rotor no motor.


Paul,
Thanks for the info.  I'll definitely make sure to use the teflon
encapsulated o-rings.  What do you and the group recommend for a proper
premix ratio?

Is anyone using a separate 2-cycle oil injection system?  Seems like it
might be a good idea to reroute the exiting oil metering pump inlet to a
2-cycle reservoir tank and increase flow via recent engine recall reflash.
Alex

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Don't forget the stock apex seals. Very important if you
don't want to tear up your expensive rotor housings.

One ounce per gallon.

Richard Sohn makes a device that blocks the oil feed to the
metering pump and connects it to a tank holding two cycle
oil.

Richard Sohn <unicorn@gdsys.net>