<< Thanks Lynn,  I'm going P Ports, then   >>

I would be getting out a big degree wheel to first find TDC, and then decide
where my intake closing point is going to be. The later the closing point, the
more dreadful the low speed performance. The picture shows a very late
closing or so it seems.

You may want to leave more material in the tube between the butterfly and the
port opening. You could just grind the end of the tube material to just clear
the apex seal. The timing could be changed, and could be changed again later
if you want.

Here are some timing events from Rotary Engine illustrated. Note the big
difference between the street port closing and the bridge port closing point.

For 6,000 RPM I would use the NA housings, and leave the top of the exhaust
port stock. I would square up the sides and put a radius on the opening that
would open the exhaust port just a few degrees early.

Just some thoughts.

Lynn E. Hanover

 
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