E90Post
 


VIBE Motorsports
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Cobb ATR WGDC table question



Reply
 
Thread Tools Search this Thread
      11-15-2012, 10:57 AM   #1
cstavaru
Brigadier General
93

 
cstavaru's Avatar
 
Drives: 2009 335i M Sport Sedan 6MT
Join Date: Aug 2008
Location: Bucharest, Romania


Posts: 3,237
iTrader: (0)

Cobb ATR WGDC table question

Hi,

After I installed the RB turbos, I tried to use an OTS map and adjust the WGDC Base table for the new turbos. I nailed it perfectly for WOT, but at partial throttle I still need to lower some values from the table (in the area of 400kg/h and factor 1.5), which are already very low. Like, I need to lower by 3, a value which is now 1.5. However this table does not accept negative values (any negative value that I input is rounded to 0).

What can I do about this ? Any other tables that I can work on to further lower the final WGDC values ? I don't really want to live with this part throttle overboost.

Edit: I now see that the "WGDC Adder (Airflow)" table has a positive value in the 500 area, so I will just zero that value out. But I don't think it is enough. What does the "WGDC (Pre-control A)" table do ?

I also have a map in the works with PTF, but I don't like the fact that I can't see anything inside it with ATR, and also it's a tedious back and forth process. So I would very much prefer to have my own ATR maps that I can modify as needed.

Any help on this would be appreciated !
Appreciate 0
      11-15-2012, 11:01 AM   #2
enrita
Major General
Sweden
91

 
enrita's Avatar
 
Drives: 335i - Big turbos
Join Date: Sep 2008
Location: Italian in Sweden


Posts: 7,324
iTrader: (0)

Quote:
Originally Posted by cstavaru View Post
Hi,

After I installed the RB turbos, I tried to use an OTS map and adjust the WGDC Base table for the new turbos. I nailed it perfectly for WOT, but at partial throttle I still need to lower some values from the table (in the area of 400kg/h and factor 1.5), which are already very low. Like, I need to lower by 3, a value which is now 1.5. However this table does not accept negative values (any negative value that I input is rounded to 0).

What can I do about this ? Any other tables that I can work on to further lower the final WGDC values ? I don't really want to live with this part throttle overboost.

Edit: I now see that the "WGDC Adder (Airflow)" table has a positive value in the 500 area, so I will just zero that value out. But I don't think it is enough. What does the "WGDC (Pre-control A)" table do ?

I also have a map in the works with PTF, but I don't like the fact that I can't see anything inside it with ATR, and also it's a tedious back and forth process. So I would very much prefer to have my own ATR maps that I can modify as needed.

Any help on this would be appreciated !
what kind of DME do you have?
__________________
07 335i AT - TD St.2 Turbos - COBB (Custom Cobb mapping by http://www.protuningfreaks.com/) - JB4G5 ISO - Okada Coils - NGK 5992 Plugs - E85 Walbro - Injen Intake - Helix IC - Snow Stg. 3 - Stett CP - AR DPs - midpipes 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - Level 10 AT upgrade - Alpina AT Flash
Appreciate 0
      11-15-2012, 11:17 AM   #3
cstavaru
Brigadier General
93

 
cstavaru's Avatar
 
Drives: 2009 335i M Sport Sedan 6MT
Join Date: Aug 2008
Location: Bucharest, Romania


Posts: 3,237
iTrader: (0)

Quote:
Originally Posted by enrita View Post
what kind of DME do you have?
IJE0S.
Appreciate 0
      11-15-2012, 12:23 PM   #4
Fully_Bolted
Banned
6

 
Drives: E92 335i
Join Date: Sep 2012
Location: USA


Posts: 443
iTrader: (0)

Probably have better luck on the other forums. Not much tech going on here.
Appreciate 0
      11-15-2012, 07:00 PM   #5
Carl Morris
Captain
7

 
Drives: 2008 335xi 6MT
Join Date: Feb 2012
Location: Boulder, CO


Posts: 639
iTrader: (0)

You can modify the P-factor table to start pulling WGDC sooner and/or harder when you get above target boost. The factory table allows quite a bit of "swing" before P-factor starts to kick in.
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 05:24 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST