Here log

Have you found the "load threshold for turbo overcharge cutoff" table?  Looking at SW358127 from an Audi A3 1.8T M382, the load thresholds look suspiciously close to what you're hitting.  You seem to cut just past 5500RPM, when the threshold goes down.  See the following link for example tables, yours may or may not be at the same address or have the same values.  If you can't find these tables, post your binary and I'll try.  May or may not be able to, but I'll take the challenge either way

(this is from file with signature D014B0907557B  1.8L R4/5VT MOTR    D020261204806103735812755/1/M3.82/05/400700/DAMOS30N/30N03-S/30N0302-S/170997)
http://i.imgur.com/cIWbatO.jpg

Ah, my bad, I see you indicated that a few posts back, sorry.

The only remaining parameters I see that might be worth toying with:
TATMSA Abgastemperatur bei Schubabschneiden -- Exhaust gas temperature for fuel cut
TLKLN    tL - Klopfschutzschwelle -- tL Knock protection threshold

The first, I'm not very sure about.  Some of the Motronic ECUs use a temperature model to compute theoretical exhaust temperature.  If you reached a condition where it thought the temp exceeded the limit for fuel cut, this may have something to do with your problem?  It could also have to do with EGR -- Not sure if these cars have an EGR temperature sensor, it may relate to that instead of computed EGT.

The second is a load limit when knocking is active.  It's possible you are knocking and due to this the ECU is trying to reduce load.  Long shot, though.

Also, I notice your injection time flatlines at 16.32 in your data log output?  I hope that's just an artifact of some invalid logging and not a reflection of actual injection time?

I assume you found valid data in the KFLUL maps before altering them, such that you are sure the address isn't different in your specific binary, correct?  I've been bit by this before!

... Just some ideas

Cheers

Well, I'm not sure why it'd max out at 16ms.  Maybe there's a maximum injection time I'm not familiar with?  16ms seems pretty short as a limit.  Wonder if there's a map that's correlating load or MAF to injection time?  Still pawing over M3.8, mainly for fun, I don't even own one of these cars.  Never know, I like small displacement turbo motors, so.. curious

How big are the injectors?

Search this Maps
Lastschwelle für Turbo-Überladeabschneiden + 2
And check you are not running in the limiter..

Friends a doubt:
I have seen many people talking about injectors & FPR scaling/adjustment for bigger/ different injectors/FPR in M38x/M592 using FGATO (Injection Correction Factor) and/or KHFM (Injector Constant), then please could elaborate the difference between both and/or how are related?
Thanks,

I keep waiting for that "O SHIT" moment when earlier motronic makes sense.

It hasn't come yet.

That's right but some documentation will be good. I only have pieces of info but not something from Bosch like the ME7 Function Document.