Paul,
   Here is the rough timing point for the 3rg gen rx7 injectors.
   Notice the double signal from it's CAS.
   It looks like right when the exhaust closes.
   Barry Bordes

   The p-port never closes. What does not make it into one face will make
   it into the next face.  Intake timing is not critical.

   Totally unlike a 4 stroke piston engine.

   The rotary is the closest thing to a continuous combustion
   engine just like a jet. Yes you get pressure waves in the intake and exhaust.

   You can record them with a maximite.

   Here are some samples.

   Paul Lamar

One comment about the late model injection systems, common rail or not, if they use piezoelectric actuators they often will use multiple openings PER-STROKE. In piston engines I have heard of 2 or 3 for gas engines, and as many as 5 for diesels. If you are looking at the standard ECUs be aware they may use several pulses, or openings of  the injectors for a single intake event.
This may be to stratify the charge, or just because of the rapid open/close cycle that they need multiple openings to get enough fuel in there. Smog control is also a possibility. Not needed on an aircraft.
Bill Jepson


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