Really appreciated  

VVT-activated KFZW2 and KFZWOP2 tables are stock on mine, too. No need to touch them as the cam adjustment is only active during cold starts.

Btw, I made a simple graph of the timing offset for Saab's 1.8t BioPower factory tune:

Thanks! Did you dyno it to get those numbers?

Thankfully with E85 it isn't so much that you're pushing anything (other than making more tq than your rods can handle ), its just that you start losing power if you get too close to ZWOPT in some operating regions. Also lambda can have a huge effect (more so than timing) once you get to that point, and you can easily have one start to affect the other.

The timing would need to be extremely over-advanced for that to occur. Detonation would also likely occur.

The whole point of proper ignition calibration is to use the Minimum ignition timing that produces the maximum power at all RPM points in the operating range. Any additional timing advance will reduce power by building too much pressure before the piston reaches TDC which is negative work.

My voltage regulator crapped out on me out of nowhere today, hah. Replaced and back to tuning now  

Roughly which operating regions are we talking about, if known, for the 1.8T?

In another thread you said the manufacturer has tuned ignition for maximum efficiency in the lower load regions. What's your opinion on retarding sligtly in those regions on E85, considering the faster burn rate of ethanol? Looking at the table, the stock tune is almost 15° below KFZWOP at some spots in the 10-20 % load region where it's unlikely knock limited in any way.

Gotcha Nyet. All of that said I don’t feel the need to advance any further. The car runs really really well. It is significantly smoother than on 93. When I made the switch I changed KRKTE (duh) and KFZW, nothing else. So kind of a mystery, but I’m ok with that.