We removed the liner from the rotor housing exhaust port and will use
 that port as the intake.
 The end housings are aluminum and will have the exhaust ports in them.
 Since we are building the end housings we can set up the port timing
 like we want, similiar to the Rx8 engine design.
 Royce

Hi Royce, I would have thought that the exhaust port is 'too early' in the intake

 cycle to be used as an intake; or do you intend to open it up towards a "later"
 position of timing? I like the idea if it works. Dave McC

Royce,after more musings on this, if you ran the engine in reverse, the

exhaust port would be pretty close to optimum for an intake, and your new
side exhausts could be above, somewhere close to the 'level' of the original
intake.Is this what you intend to do? Following with much interest, Dave McC

Dave, sorry for the delay in my reply to your privious message.
Have been very busy for the last 3 months. I should have said "VERY".
The engine will be a mirror image of the mazda. In other words the shaft 
will still run the same direction, but the rotor
housing will be flipped over so that the intake and exhaust are on the 
right side when viewed from the front, jsut the opposite
of the production engine. It will use the front rotor and front 
stationary gear so the rotor pockets are correct for the
combustion chamber.
This will put the intake at the bottom of the housing and the 
exhausts at the top, just reversed from production.
If you consider your assumption of reversing the engine, and 
building aluminum end housings with the exhaust ports in them
instead of the rotor housing, you will see that you are correct, 
the intake (P_Port) will be in a good location.
If you study the exhaust port location in this light, you will 
see that it will be located about the same (as an intake) as it
is from the factory.
The steel liner in the rotor housing leaves much room for port 
shape and location.   You can set the port timeing just about as
you please.
The concept here is to have a huge p-port, and side exhause with no overlap.

We had all the patterns for this at Sun N Fun, but not everyone was able to come.
We will post some pictures as soon as we have the time to do so.
The side exhaust ports with little to no overlap will make the 
exhaust quiter, cooler because you will burn more of the charge,
and eliminate much of the internal EGR of the present engine.
Royce

The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.