ST Overboost

  • Login, members don't see Ads!

335is02

Specialist
Mar 10, 2018
91
Hello everyone haveing an issue with my 2012 bmw 335is DCT.

It runs great map 1,2and 3 holds boost targets and everything seems great. Come map 4 it overboosted pretty bad tried another slight pull same result.
Now trying to figure out what to look out for or start double checking. Any help greatly appreciated. T
Below is set of my mods.

Jb4 with mhd
Jpworkz 6466 bottom mount twinscroll DBB
Vador stage 3 dual 450s
Vrsf FMIC 7.5
Docrace intake manifold with portinjection
72lb injectors
Burger motorsports PI controller
Hobb switch
Mac solenoid
-6 upgraded fuel line feed
Tial 50mm BOV
Index 12 injectors
PR Workz ignition coils
97506 spark plugs
Phenolic spacer

Here is a map three and then map four to see difference.

[[email protected],[email protected] 40 125 250 500 1000 [email protected],65.9025]https://bmw.spoolstreet.com/attachments/2019-02-09-18_54_39_map-4-1-csv.22655/?datalog=1[/GRAPH]
[[email protected],[email protected] 40 125 250 500 1000 [email protected],92.6675]https://bmw.spoolstreet.com/attachments/2019-02-09-18_55_46_map-3-1-csv.22656/?datalog=1[/GRAPH]
 

Attachments

Last edited by a moderator:
  • 1Like
Reactions: doublespaces

supra2k6

Lurker
Feb 24, 2018
13
post logs

What spring do you have on your wastegate? also can you post pics of your setup?
 

335is02

Specialist
Mar 10, 2018
91
post logs

What spring do you have on your wastegate? also can you post pics of your setup?
15 pound spring.
I have some more pics at home i can post some more today. But i have a few on my “SavedIS” build post on here.
And i went to jb4 blue tooth and having a hard time converting my logs to graph it keeps telling me need to set parameters but wont show log i just get the number file
 

chrisdfv

Corporal
Aug 29, 2017
220
15 pound spring.
I have some more pics at home i can post some more today. But i have a few on my “SavedIS” build post on here.
And i went to jb4 blue tooth and having a hard time converting my logs to graph it keeps telling me need to set parameters but wont show log i just get the number file
My guess is it's your wastegate adaptation/FF or duty bias settings for Map 4. I believe the single turbo firmware has map specific settings for each. It's not global like it was on twin turbo firmware.
 

335is02

Specialist
Mar 10, 2018
91
post logs

What spring do you have on your wastegate? also can you post pics of your setup?
15 pound spring.
I have some more pics at home i can post some more today. But i have a few on my “SavedIS” build post on here.
And i went to jb4 blue tooth and having a hard time converting my logs to graph it keeps telling me to se parameters.
 

335is02

Specialist
Mar 10, 2018
91
My guess is it's your wastegate adaptation/FF or duty bias settings for Map 4. I believe the single turbo firmware has map specific settings for each. It's not global like it was on twin turbo firmware.
Ok do you know what they should be set to? We had a similar problem with a friends 135i ST but he ended up wrecking his car before it ever got adressed.
I did smoke my car and pressure tested it no leaks also thats why i asked for help here now.
 

chrisdfv

Corporal
Aug 29, 2017
220
Ok do you know what they should be set to? We had a similar problem with a friends 135i ST but he ended up wrecking his car before it ever got adressed.
I did smoke my car and pressure tested it no leaks also thats why i asked for help here now.
Really need to see a log to see what's going on. I guess you can start by making sure the duty bias is 50 at all rpm for map 4 and set FF low and let it learn up.

edit: Holy send it batman. At least your port injection is working lol
Set your wastegate adaption to like 3 and that should fix your issues.
1549995083115.png
 
  • 1Funny
  • 1Like
Reactions: veer90 and 335is02

335is02

Specialist
Mar 10, 2018
91
Really need to see a log to see what's going on. I guess you can start by making sure the duty bias is 50 at all rpm for map 4 and set FF low and let it learn up.

edit: Holy send it batman. At least your port injection is working lol
Set your wastegate adaption to like 3 and that should fix your issues.
View attachment 22649
Ok ill set it and do another pull thank you
 

Milan

Corporal
Dec 24, 2016
186
jebi se
1) Your PI controller is controlled by a Hobbs switch?
2) Phelonic spacer?

I can't tell if you are trolling or not
 

veer90

Lieutenant
Nov 16, 2016
914
West Nyack, NY
lmao I made this same mistake once accidentally set FF too high, overboosted to 32 psi on map 3 and damn near shit myself

your FF is set way too high for map 4. try manually entering 30 and make sure PID gain is at 25, see what it does.
 
  • 1Like
Reactions: 335is02

chrisdfv

Corporal
Aug 29, 2017
220
lmao I made this same mistake once accidentally set FF too high, overboosted to 32 psi on map 3 and damn near shit myself

your FF is set way too high for map 4. try manually entering 30 and make sure PID gain is at 25, see what it does.
His FF is only about 4 for 20 psi and wgdc follows FF pretty good. 30 may be too high for map 4.
 

335is02

Specialist
Mar 10, 2018
91
His FF is only about 4 for 20 psi and wgdc follows FF pretty good. 30 may be too high for map 4.
Lol yea it scared me to see those numbers. Its been raining everyday since I posted this just waiting for a nice day and ill change FF and try it out hopefully that will fix it.
 
Top