Here is an excellent page on the different ports including their timings.
Does not include the peripheral port

http://www.rotaryengineillustrated.com/RE101pages/4-ports101.html

On the second illustration you can click on the P (primary) or S (Secondary)
for the year engine you are interested in and it will draw that type port
relative to the timing lines on the illustration.  Then you can also select
some of the special porting slection listed below the stock for a visual
comparison

Ed


Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com