Hi i tried to find something about EGT enrichment on BAM/AMK ECUs factory K04 wideband with real EGT ATR system.

The problem is that with hybrid turbo or even STG2 K04 high boost the EGTs go sky rocket high. About 900°C+ in 4th gear 6000rpm+ with 15° timming and 0,81 lamfa.
As i found The modeled BTS enrichment is factory disabled. And enrichment completely stay on ATR module which in 920°C dump raw fuel to cylinders.
On factory ATR with 630cc injectors it can overfuel to misfire trying to lower EGTs.
With factory 386cc injectors its not that much problem because it cannot supply enough fuel to misfire.


How can you sooner enrich to prevent this?

1) enable BTS fueling (did not find how to enable on BAM/AMK) its not probably that simple?
2) configure somehow ATR to lower output?

Thanks for the help!

B_tabgbts is not triggered in your log

reduce ATRI by 30% for a first test!
leave TABGSS @ 920

Maybe i did not understand what he is trying to achieve.
To me it sounded like: When bts kicks in its over-enriching, what can i do to reduce this?

This is why i think ATRI is the correct map for this.
Why and when he is reaching the 920degree celsius is a another topic.

Yes I think about lowering ATR TAGBTSS to 850°C and reduce action to not overfuel engine. Should work?

On stock injectors it was over 100% dc in ATR mode but actual lambda was around 0,76-0,77 (request 0,6) and EGTs were reducing just fine not go over 950 (TAGBTS=920). No overfueling.
But I upgraded to 630cc to have some headroom but bad overfueling appared.

This is try file to enable BTS enrichment (modeled) but unfortunately not working and ECU follows LAMFA then ATR enrichment 950°C.
018BH file

First before I say anything. Do you guys understand that richer lambda = lower EGT?
Do you understand that it is already at 920C and even running minimum possible lambda EGT is going up past 920C?
Do you understand that if you remove ATR or kill it's reaction, this will just slow down the speed at which it reaches minimum lambda, and there will just be even more temperature overshoot?
Do you understand that EGT is not an infinite number? Do you understand that you can melt pistons with too high EGT? Or damage the turbo?

If you do, then WTF are you guys doing?

It is not overenriching. Look at the log. It is holding 920C and to hold 920C with the boost he is requesting it needs 0.65 lambda.
If it was "overenriching", then the EGT would drop, but it is not dropping.

If he reduces the ATR action, then the EGT will just rise uncontrollably until he melts a piston or drops a valve.

both wrong.
Your only option is to reduce the amount of boost and add ignition timing, and make it richer to start with.
Add 1.5-3 degrees, reduce boost by 0.1 bar. Set lambda already from LAMFA to 0.79 or so from 5000 rpm and 0.78 after 6000 rpm. Increase timing as much as possible.

The reason it goes to 0.65 is because even with 0.65 it can't reduce the EGT. There is too little reaction to adding the fuel, EGT keeps climbing.

Your problem is not ATR, your problem is that you are desperately trying to put a hole in your piston and the ECU is doing it's best to prevent it.
The average temperature is 920, I am sure cylinder 3 is already past 1000C with the knock retard on top. You want to test the melting point?

Also K04 turbine is rated for 920C continuous, it is not rated for 950C. I mean, probably it won't get damaged immediately, but this is manufacturer rating. 920C ATR is just fine.
BTS is mostly not needed, you need less boost, more timing to prevent getting to this point.

It's amazing how people are so good at computers these days but don't understand jack shit about the combustion process. It's an engine with explosions inside, better learn how they work.

This log was test for TABGSS=850° the result was much worse than original settings as you can see

Thats not bad advice BUT.. I tried reduce boost to only 1 bar and timing was about 22° and the EGTs were ONLY about 50°C less!

Another missinfo, original stock BAM file goes LAMFA 0.95 and original TABGSS=920°C when ATR kick in so 920°C+ is normal EGT temperature K04-023 and car works as designed.
(Of course its not ideal but no damage instantly!)
ey work.
[/quote]
No help from you, thanks!
In the end I was succesful to finally found solution for BTS and its start to work on my file after some modification. And the result? The EGTs are around 850°C-900°C maximum!! With the same boost/timing! 5th gear highway RUN!
Now I can test some different values KFLBTS enrichment and results will post some logs.