New boost control XDF tables

RSL

Lieutenant
Aug 11, 2017
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Either define in your XDF with TP using that info manually or open the XDFs in a text editor and copy/paste the code for the tables over.
 

Jeffman

Major
Jan 7, 2017
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I love seeing the discovery of new tables like these, and then tweaking my IJEOS FlexFuel custom map to hopefully see some kind of improvement or performance gain. For these boost control tables what changes have people tried and what are they observing?
 

JohnDaviz

Lieutenant
Jan 6, 2019
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577
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335i E92 DCT

Attachments

  • V903_INA0S.bin _ XDF File - INA0S (Boost Tables).xdf.png
    V903_INA0S.bin _ XDF File - INA0S (Boost Tables).xdf.png
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  • V903 - Brave.jpg
    V903 - Brave.jpg
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keninger

Specialist
Sep 11, 2018
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335i E92 N54
You also have tables like the boost limit multiplier and boost request offset % that influence the target.

These are the values I am running and my boost target still isn't what I expect it to be. I8A0S rom

boostTarget.jpg

boostTarget2.jpg
 

carabuser

Lieutenant
Oct 2, 2019
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Z4 35i & 335i
The boost request offset is what's causing that. It references the LSA of the VANOS. If you lower it then you'll see the boost target increase.

Changing that table effects other things so don't go crazy. The beauty of the tables I posted here are they sit at the end of the boost target calculation so don't effect anything else. You can set them below 1 if you want to increase the boost target over any limits.
 
Last edited:

carabuser

Lieutenant
Oct 2, 2019
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The dynamic table I think is related to overboost so may not even be active for you. You probably want to be making changes to the "normal" table.

These are the values I currently use, I rescaled the axis to focus more on the top end:
1608372597751.png


I've fixed the boost ceiling issue now so I have my load target set at around 220 which has my boost target sitting around 21PSI and I use this table to taper the boost target down at higher revs.

The main benefit of this table was that it would allow DCT cars to be able to target 18.6 PSI rather than being stuck at 17.8 PSI but since fixing the ceiling issue it's only real use is for tapering the boost. It works much better than tapering the load target in my experience as the change in target is instant after the shift rather than filtered.
 
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keninger

Specialist
Sep 11, 2018
66
11
0
Ride
335i E92 N54
The dynamic table I think is related to overboost so may not even be active for you. You probably want to be making changes to the "normal" table.

These are the values I currently use, I rescaled the axis to focus more on the top end:
View attachment 47349

I've fixed the boost ceiling issue now so I have my load target set at around 220 which has my boost target sitting around 21PSI and I use this table to taper the boost target down at higher revs.

The main benefit of this table was that it would allow DCT cars to be able to target 18.6 PSI rather than being stuck at 17.8 PSI but since fixing the ceiling issue it's only real use is for tapering the boost. It works much better than tapering the load target in my experience as the change in target is instant after the shift rather than filtered.
I have kept my normal and dynamic tables the same, to avoid any issues, but I was surprised how the whole rpm range was influenced and not only the higher rpm part. I will do more experimenting with it, and I will also try your values with the same load target I was running previously.

Do you happen to have an xdf for I8A0S where I could rescale the axis?
 

JohnDaviz

Lieutenant
Jan 6, 2019
863
577
0
Ride
335i E92 DCT
I've fixed the boost ceiling issue now so I have my load target set at around 220 which has my boost target sitting around 21PSI and I use this table to taper the boost target down at higher revs.

The main benefit of this table was that it would allow DCT cars to be able to target 18.6 PSI rather than being stuck at 17.8 PSI but since fixing the ceiling issue it's only real use is for tapering the boost. It works much better than tapering the load target in my experience as the change in target is instant after the shift rather than filtered

By fixing you mean for you exclusively? Or has the fix been implemented for everybody?
That would be awesome if it is or will be available to everyone!!