Assuming you install a dry sump system the big questions is how the drain
back oil out of the rotors oil will behave. It might drain back better than a
plugs up engine.
 On the other hand the main bearing oil drain backs point straight down and
they may be more of a problem.

If you must run inverted, connect one scavenge line to the breather hole.
That will collect the rotor and bearing oil from the center section when
inverted. And the other to a line through the front case to a spot half way back on
the bottom. Or weld a fitting through a rotor housing near the pan rail. To
collect the center section oil when upright.

The first one I did I pulled the oil out of the hole left by removing the
stock pressure relief plunger gizmo in the left rear. I put that suction fitting
into the oil pressure banjo bolt hole.

On the front,  I cut away a bit of the relief plunger hole. I welded the
relief port shut and pulled the oil out of the fitting that would have sent it to
the cooler.

You still need a breather port to connect to the dry sump tank. You can weld
in a fitting through a rotor housing or the front case any where or if you are
crank triggering the ignition, make a plug for the distributor hole and add
the fitting there. It matters not that the fitting may be submerged in oil some
of the time. The scavenge sections of the pump are both bigger than the
pressure section of the pump and they pump against just about zero resistance. So
they try to pull out more than is going in as blowby and lube oil. The vent
line flows backwards, letting replacement air volume into the engine from the oil
tank. The only breathing is from the tank and that is done through a valved
breather (Christian.) I don't see a problem with the seals and the drainback
holes. There are bearings and seals running flooded all of the time. Like a wet
sumped race engine when you stand on the brakes and the bearing spill piles up
around the front seal. If a seal starts to fail in a dry sumped engine, it is
not usual to leak oil but just suck in a little air. They don't even use oil
slingers to help the seals anymore. It just is not a problem.

Lynn E. Hanover

 
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