The inlet would be the leading plug hole. The outlet the stock exhaust port. Draw that up. Flip it top to bottom and left to right and port the other side. It will work as a compressor or a steam engine.

 

Lynn E. Hanover

 

 

I was thinking that maybe if you position the ports correctly, you might
be able to power two sides of a rotor at once: Side A would be feeding
steam in through the normal intake port, then exhaust out through a
p-port somewhere around the leading sparkplug location; Side B would be
feeding steam in through a new port somewhere around the trailing
sparkplug and exhausting out the normal exhaust port.

I'm pretty sure this would work for one side, but I'm not so sure about
two sides at once.  I have a '91 turbo 13B that I'm intending to go into
a BD4 someday, but have not gotten around to tearing it down, so I'm not
intimately familiar with Wankel timing yet.  What do those of you who
have a lot more experience with the engine think of the idea?

Grant Schemmel
Penrose, CO