Get a grip on falling boost pressure EA888

[Tim@Magicperformance]

Hello,

before I continue looking for the error, I'll write it here briefly.
I've run about 20 tests and just can't get the problem under control, no matter what I adjust. I suspect that I simply haven't found the limiting parameter yet.
I can't get a grip on the boost pressure offset. The boost pressure drops down from ~2,500rpm by ~70kpa although I would like to keep it there.
why does the boost pressure always drop?i can't find the cause.

thank you Tim


Test 1.0.hpt

[aaronc7]

There's an incredible amount of changes in this file over original VR, most of them not performance related at all. Mass copy paste from another file? In most cases this causes all sorts of weird issues. I'd start over from scratch.

[Tim@Magicperformance]

In fact, because of the IS38 and head conversion to S3, I adopted some values ​​from the S3 and then built on them.
I'm throwing out the data files and limiting the changes to a minimum for now.

Thank you

[Tim@Magicperformance]

Hi aaronc7, i have changed the values to standard except for ignition and the limiting values, but the problem is still the same.
can you think of anything i might have forgotten?

log19_05_2025.hplhp pressure 130kpa.hpt

[Tim@Magicperformance]

Does anyone have an idea where this strange behavior could be coming from?
I have noticed that the boost pressure always drops from a speed of exactly 4,000 rpm.
then i tried to adjust the most noticeable parameters but the behavior remains identical.
i cannot find the limitation which is the cause of this behavior.