That was a misunderstanding, my native language is portuguese, for us translation of advance is the same of timing, sometimes i forget and just change things.

My point (doubt) was: EGT changes with TIMING (not the term advance, my bad) the calculated EGT beeing different when ECU is running without any knock or with severe knock (torque intervation togheter) would trigger some corretion ?  you answer NO, and makes sense.

I'll look at mine and see, if I can figure that out. I've made some changes since my last upload of my map pack.

That´s probably the case as beyond the expected point of TLAFA there are significant differences.
I checked the TLAFA code at assembly level and in my software there are no matches in function wise.

The 1D4634h (without TLAFA) and 1D43BEh (with TLAFA) offsets are the first ones which match beyond this point.
There are identical values in this region, however their functions are completely different.

Based on the things I had to do in order to get back into control, I´d think it is safe to say that lambts in fact isn´t just KFLBTS/LBKO + (DLBTS * KFFDLBTS).

In order to get back in control I had to disable KFFDLBTS completely, by setting the whole map to zero.
Eventhou setting either of DLBTS or KFFDLBTS to zero should do exactly the same thing, it clearly doesn´t.
Setting the DLBTS scalar to zero made no difference what so ever, but disabling KFFDLBTS meanwhile did.

In addition I made another change to KFLBTSLBKO (KFLBTS while charge flaps are open).
Since I couldn´t think any reason to have two different KFLBTS maps for different situation, I simply copied the contents of the KFLBTS map to the KFLBTSLBKO map.
By default the KFLBTSLBKO map is even richer than the already extremely rich KFLBTS map. Based VAG documents the charge flaps on these engines stay closed between 1000-5000rpm
and the map itself pretty much confirms that. Below 5000rpm the KFLBTSLBKO map is leaner than the KFLBTS map, however exactly from 5000rpm and beyond the KFLBTSLBKO becomes much richer.

By default VAG basically has used KFLBTS for fueling on this ECU (8P0907115, 2.0TFSI AXX).
They have set the LAMFA map so lean (>= 0.9063 at all rpms) and the chamber EGT limit to so low (800°C) that it ensures that KFLBTS is used at all times
BW K03 / K04 on TFSI engines should be rated to 1025°C continuous (1050°C peak) temperature, so based on that the stock EGT limit is ridiculous eventhou the two temperatures are not exactly the same.

The changes I´ve made:

- Calibrated LAMFA for optimal AFR at all rpms (best performance, but still perfectly safe to run)
- Calibrated KFLBTS in similar manner but with around ~0.06 lower lambda than in LAMFA map, to lower the EGT in case the safety limit is reached for whatever reason
- Copied KFLBTS over KFLBTSLBKO to disable the enrichment map changing at 5000rpm when the charge flaps open
- Set KFFDLBTS map to zero (to disable it)
- Set DLBTS map to zero (to disable it)
- Raised TAIKRBTS from 800°C to 950°C.

Eventhou disabling the two scalar maps may sound harsh, that´s what Bosch specifies in the FR (for DLBTS).

 

It's not a good solution. Instead it's better to decrease these factors in desired areas but leave them unchanged for very bad conditions (when ignition efficiency is very low).

I agree about disabling the KFFDLBTS and DLBTS, I don´t like the idea either but that´s the only method I could regain control
I tried to calculate the expected lambts output with with KFFDLBTS and DLBTS taken into account, however the official formula of "lambts = KFLBTS + (DLBTS * KFFDLBTS)" didn´t produce the readings I was seeing.
Even with DLBTS set to zero I saw constantly 0.69 - 0.72 AFR even when KFLBTS/LBKO specified 0.82 at that point.

If lambts would be calculated with "KFLBTS + (DLBTS * KFFDLBTS)" formula then setting either (DLBTS or KFFDLBTS) to zero would disable the scalars completely.

I think I´ll try to look the software with disassembler to see how the KFLBTS, DLBTS and KFFDLBTS are used for lambts.
Since ME9 FR suggests that DLBTS defaults to 0.0 at all deltas, I don´t think the currently known formula is the whole truth.
Unless Bosch disables KFFDLBTS too, which is not the case.