Good, this makes perfect sense and I follow the logic.
I was just researching Link as another rotary friend turned me onto them. While doing so I came across this thread which reminded me of a similar one on RX7club.
I see little discussion on this topic specifically regarding rotaries and what I have found seems to be primarily from Haltech.
I had my own Eureka moment months ago and to my surprise it aligns with Link's train of thought, so it's nice to know injecting right after exhaust port is closed works well in practice. The only way I could think to do this in a repeatable manner is 'start of injection' which you just confirmed is the case.
My MS3pro defaults to end of injection but can be changed. Both MS3 and Haltech go by E-shaft angle which I don't believe can be changed. Either way, looking at your PDF it appears 130 degrees BTDC lines up with 230 degrees E-shaft angle.
This evening I went out, switched the MS3 to start of injection or in Megasquirt's terms "beginning of squirt" and changed the table to reflect the E-shaft angle of exhaust port closing. It started up well, but unfortunately I am unable to drive it and do some road tuning until finished with the 8.8 IRS swap.
My only concern was whether or not there is enough time with SOI to fit the injection in at higher loads before the port closes, but there seems to be an ample window of time and it has obviously been working for Link all along.
For anyone who wants a look at that similar discussion.
https://www.rx7club.com/haltech-forum-62/injector-firing-angle-continued-1101069/
