If you are getting ping on 93 octane I would expect something to be off on your setup, base timing or something like that. on 91octane I can get 14psi without knock on nearly the same setup. Was there knock with the old injectors? When did the knock start?
No no... I don't get ANY ping once it learns. It's only while it's learning the boost curve and it's only in the lower RPMs. Once the ECU learns though, no knock.
So far this is the same with old injectors and AMM and these injectors and new AMM... the only difference is the surging idle.
That said, it's shifted from a revving (akin to when there's a huge vac leak) to more of holding 1600rpm and then cutting the (something) out to drop the idle but it almost stalls and wakes itself back up to 1600rpm. When I got to work this morning and it reached the idle (800rpm) consistently, I sat there for about ten minutes and the AFRs were hunting around while the RPM was changing (only perceptible by ear not gauge) +- a few RPM.
AFAIK my timing should be straight up and down... my head does have a bunch of metal removed from it though... not sure if that affects the timing...?