Jerry Hey wrote:

Paul,  This is my proposed  insert. (old drawing)  The part that goes
through the housing is 2.25  o.d.  The port, after grinding is a
rounded rectangle 1.5 in high and 1.75 in wide.  Thus the aluminum
insert wall thickness varies .375 in thick down to .075 depending on
where it is measured. Is this something I should be concerned about?
The wall thickness increases as the opening is blended down to the
l.5"
bore size.    Anything else cause concern?    Thanks Jerry

A bit on the small side. My guess is around 200 HP at 6000 to 6500.

Paul Lamar

Two hundred HP will do for starters.  The the height of the port
opening  is determined by the desired  timing which came from Paul Yaw.
    However, there is a LOT of material that can be removed if we want
to make the port wider. That is not an accident.

The insert is a manual lathe job.  I met a retired shop teacher who
builds steam engine parts in his little shop as a hobby.  He is quite
talented with the manual mill and lathe.  I am going to talk to him
about making the insert/throttle bodies.  He might be able to fixture
up and bore the housings also.   If he can handle both jobs for a
reasonable price, then the 200 hp, very light weight rotary engine will
be easily attainable.  I might know by the time  you get back from Sun
n Fun.   Of course,  someone will buy the new [2.85:1] drive,  and spin up the P
Port for around 240 hp.   No heavy, expensive, bulky turbos required.
Jerry

 
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