I  don't think that some of you are getting what I'm saying. You build a mirror image 13b by configuring it like so:
As it were sitting in the car, the intake and exhaust ports would be on the left side. This would be accomplished by merely reversing the rotor housings and middle housing to have the ports face to the left. This would put the cooling passages in the correct position. You'd have to make a mirror image front and rear housing -definatly do-able( but not by me).  The e-shaft and rotors wouldn't know the difference. To make a reverse oil pump, you'd use the inards and then make a mirror image pump housing. If you've gotten this far, figuring out how to configure the water pump is academic. The only thing stopping anyone from doing it is a need for one and the manufacture of a few basic parts. Easy for me to say.
Brian Trubee

Maybe this will help Brian.
We are building a single rotor engine. We are using the rear rotor and rotor housing turned 180 degrees so that the plugs are on the opposite side.  We are building aluminum end housings with the water flow channels and the oil passages on the opoosite side from what they are in the original.  If you are looking at the engine from the flywheel end, the oil circuit will be on the right side, the plugs on the right but the e-shaft and the rotor runs in the same direction it does on the mazda, counterclockwise from the flywheel end.

The peripheral exhaust port becomes the intake port with modified timing, and the exhaust ports are in the two end housings just as they are in the RX8 engine. This way we can eliminate the port overlap just as Mazda has done.  ( and still sneak in a peripheral port intake system ) Since the e-shaft runs in the same direction as it does on a 2 rotor the oil pump runs the same and is also located the same.
The pressure relief valve that is now located in the front  cover is relocated to a bolt on block on the front housing so it doesn't leak, and the housing can be flat machined just as mazda does.
Timing pulses will be picked up from the flywheel, Flexplate in our case, and the rear counter weight is machined from aluminum and balanced on the outer rim of the flexpate.
We are using the front stationary gear to run the rotor and control shaft endplay just as mazda does.
We have made a rear stationary gear from 7075 aluminum without the gear teeth so that it is just a rear main bearing support but otherwise looks just like the rear stationary gear.
The housings are two piece aluminum, flame sprayed for wear on the rotor sides, and the water and oil passages are machined into the rotor side of the plates. The other plate has all the other components and it is bolted to the rotor side plate with the stationary gear bolts and the tension bolts, with a gasket in between.
We are using 12A rotor housings so the housing water seals are in the rotor housing and we do not have to deal with machineing them in the end housings. ( could do the same with first gen 13B housings).

In effect a single rotor engine that is a mirrow image of the two rotor as far as the engine layout is concerned.
Royce

 
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