You said you tried different octane fuels and such. Some stations differ obviously , but if you are buying 95 they have to meet 95 octane standarts at the minimum as thats how it comes out from the refinery, I doubt that will be the case.

you are free to say what you mean, every advice to me is gold worth. I take in consider both bad and good comments

No this is a poor counrty, and noeone controls many things, including petrol stations. And 80% petrol stations do their on malversation. Some mix water with gasoline, some count more petrol than they put in car, and soo on. You will never understand if you live in country where there is a law.   Many newer cars light on check engine after filling tank.  And when I travel to Germany and there fill a tank my fuel compustion gets better by 10-15%.  Every man in out living area, even who doesen't undestand how engine work, know that we got the awful fuel

Back to topic,
Even running on LPG i got some knock retard, -1.5 degree. But if i take in consider that LPG burns slower and have more than 100 octane rating, that knock retard is bad news. Are they?
Soo where to start? What to look on engine?

new test, in my tank i have left over 15L 95 octane, and put in 40 L  98 octane premium fuel
Here are both test, with 95 and 98

But what can I do? What can cause so much retard?

Random suggestion. Unplug your maf, and do a log. If your maf is under-reporting, load will be different, and target a different area in the timing map. Lower than normal load via maf = more timing advance.

"Maybe" there is some leak or something
Ps_w is under actual boost, but i don't know how much can be in some areas is 50mBar to 100 mBar

Same is with Rl and rlsol, even when boost desire match boost actual. Rl is 5% below rlsol, on some areas go to 10%
I don't know is that in border of tolerance

Next thing why i think I have some leak is beacuse my boost is low at 95% WGDC
but that doesn't must mean that, maybe N75 is fault or something else      (turbo is K03s,and this is tuned file)


But even if that is true, that my MAF doesen't measure right, if we look at desire ignition angle, it is still low(but again i have knock on that angle). maybe it is not important but to mention, It doesen't follow values in table

KFZW copied from 150 hp engine, 98 oct fuel
There is no knocking even on tuned file
For now power is okay, but this turbo schould give more, wainting for parts and free time to disamble engine

Probably ARMD.

Change your KFDMDARO from this:


To this:


It will disable it over 50% torque.