Thanks for the suggestion. That would take too many flashes to be feasible and I think VD is too unreliable to get reliable results. Add to that that I doubt I would be able to do this in one day and the uncertainties atmospheric conditions would cause.
Next thing is: Is it really worth the effort? The car runs great, has very very little torque dip, and it really wouldn't benefit the top end.
I think I am done:
- First, no one seems to be really sure if the dip is real and/or "supposed" to be there or not.
- Clearly, it's related to the AVCS (as it disappeared when I accidentally drove with the AVCS off in error mode). So maybe it's "just there" when using those settings (and again the torque is good in that area).
- Looking at it practically: Even if it dips for real in the cylinder, it's not significant (11.5). And it's not in an rpm range my car will see WOT very often with my usage. Driving on the street at 3500 rpm it will be in closed loop most of the time.
- On track, it will almost never see WOT at 3500.
Doing extensive further work on this seems like wasted energy. That doesn't mean it was a waste of time, on the contrary, I learned a lot of how things interact from messing with it.
I do indeed intend to use the method to correct the lean spot between 4 and 5000 rpm (real or not, for knock prevention). Otherwise, my next focus will be to keep an eye on timing and adjust it, I am pretty sure it will be necessary when it gets warmer here.
I tried copying my tables in there, and the lobe display doesn't seem to change?