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use a top hat from a pump that doesnt have the regulator and use a referenced fuel pressure regulator on the Rail so it'll scale 1:1 with boost if you're going for a higher power non decos car

In such case he needs to set fuel pressure correction map FRLFSDP to 1. But he doesn't have address of this map)
Although address of this map in 40LPHJ software is 0x23842

Thank you!

Sorry for the late follow-up, I´ve not had much spare time lately but I tried this one out in the car and it did not work well.
So I decided to go to the dealer and get the ECU updated.
Software went from 30653124B 40LKMA.A2L to 30729127A 40LPHJ.A2L, Most annoying part is that I cannot see KVB in this version either 
I have attached binary read from the ECU after the update

Your KVB addr is 0x1F7FE, KRKTE - 0x23858 and TVUB - 0x15FEA

you never seen this! hahha i been going through this bin on my spare time since. i have the map sensors ready, and a spare manifold to put a bung in.
one day i'll fuck with it

If anybody wants to look into this file here is it https://cloud.mail.ru/public/sgtq/Gwi3tYSog
MAP grad is at 0x17CB0
MAP offs is at 0x17CB2
multipliers as for DSLGRAD and DSLOFS.

Convert the map and your base boost to a pressure ratio and populate accordingly.
Changing the axis is not needed.

They just did a 3d map instead of a pressure ratio map for base boost, because it is possible to be more accurate, but unless you have access to a dyno cell with adjustable ambient pressure it's not very relevant for you

Thank you PRJ. I really appreciate your advice.

...you need to make a patch to set base boost to pu_w instead of what is calculated in IIRC LDRPLS...

Yes, I have read your posts.

RS4 K-box...so I hacked the binary to have plgrus_w = pu_w like it is done on the S4...

...551K... you need to make an asm patch.

But I don't have the knowledge to change assembler code.

2nd option and don't touch KFVPDKSD/E.

OK, I'll try solution number 2.

How should I calculate the Z-values for KFVPLGU of rows 600-970:

Should I use the delta of the values of the pssol_w axis? Like the following example:


Or should I adjust the Z-values in a way that I get the same shape as stock but increased for my new waste gate cracking pressure? Like the following example:

Newer Software for your car. 2004 update, i have kvb on it

Thank you!

Sorry for the late follow-up, I´ve not had much spare time lately but I tried this one out in the car and it did not work well.
So I decided to go to the dealer and get the ECU updated.
Software went from 30653124B 40LKMA.A2L to 30729127A 40LPHJ.A2L, Most annoying part is that I cannot see KVB in this version either 
I have attached binary read from the ECU after the update

Big thanks! I missed this message early.

you never seen this! hahha i been going through this bin on my spare time since. i have the map sensors ready, and a spare manifold to put a bung in.
one day i'll fuck with it

Are you sure your car has DECOS at all? In 40GPHJ there are no DECOS maps.

yea 40 series and lower and not decos, they're fixed 50series is decos  we have LPT DECOS 04.5+ and all T5 and R, in the EU its only the T5 and R hence the post 04.5+ 40 series bins.

use a top hat from a pump that doesnt have the regulator and use a referenced fuel pressure regulator on the Rail so it'll scale 1:1 with boost if you're going for a higher power non decos car

If you want to do it the cracking pressure ratio way in KFVPDKSD/E, then you have to change CWPLGU.
Because 551K software does not have this codeword configurable, you need to make a patch to set base boost to pu_w instead of what is calculated in IIRC LDRPLS.

If you can't do that then you need to do it completely differently by changing LDRPLS, so like your 2nd option and don't touch KFVPDKSD/E.

[Target]

Hello

Target
I want to adapt the software 8D0907551K from my RS4 B5 to the new base charge pressure (waste gate cracking pressure) of the new turbochargers. The original waste gate cracking pressure is approximately 400 mBar (6 PSI) and now it is approximately 900 mBar (14 PSI).



Possible solutions
I have read in the forum about four different solutions to made this adjustment. As far as I understand, only the following two solutions are possible in my case:



Solution no.1
Only adjust the vpssplg axis of KFVPDKSD and KFVPDKSE maps.

The KFPLGUB and KFDPLGU maps do not exist in the DAMOS of 8D0907551K. This means that I cannot directly modify the calculation of plgrus_w. However, I know the calculation for vpssplg:

RS4: plgrus_w = Output of KFPLGU/B
vpssplg = pssol_w/plgrus_w. vpssplg is the axis for KFPVDKSE/D

vpssplg (Druckverhaltnis Saugrohrsolldruck zu Grundladedruck) = pssol_w (Sollsaugrohrdruck) / plgrus_w (Grundladedruck Sollwert).

According to

cracking pressure is ratio = 1

, the axis vpssplg has the value 1 for the base charge pressure. I assume that the original base charge pressure has the value 1400mBar.
If I use the assumed original value of 1400mBar for plgrus_w in the calculation and use the new base charge pressure of 1900mBar for pssol_w, I get the following ratio value: 1900mBar / 1400mBar = 1.357142857142857.

The ratio of plgrus_w = 1.357142857142857 therefore corresponds to the new base charge pressure of 1900 mbar.

The values of the axis vpssplg_w of the maps KFVPDKSD and KFVPDKSE multiplied by the factor 1.357142857142857 results in:




In comparison, the original values:



Solution no.2
Only change the KFVPLGU map according to

...First ...get a 3rd gear log of my "base boost pressure" with 0% WGDC. I used that data to fill in the last column of KFVPLGU, and then adjusted the rest of the map to keep the same shape as stock but increased for my new wastegates (15-16 psi). With it set up this way, the ECU knows to control boost under the wastegate pressure with the throttle plate (no need to change the vpssplg_w axis for KFVPDKSD/E).

...KFVPLGU ...I set all the rpm rows before I hit my peak boost to the same value, I'm not sure if I was correct in doing that.. but I haven't noticed any ill effects...

OEM values:


Values adapted to the new waste gate cracking pressure:




Question to the forum
Do you recommend solution no.1 or no.2 for me? Or is there another solution variant that is better and I'm able to do (please be aware, I'm haven't the skill to change assembler code)?