BMW E46 M3
Legend Eternal
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
Technical Sections Coding / Tuning / Audio-Video / Electronics

Post Reply
 
Thread Tools Search this Thread
      04-04-2020, 09:28 PM   #1
x Spades x
Second Lieutenant
34
Rep
229
Posts

Drives: BMW E46 M3
Join Date: Feb 2020
Location: CT

iTrader: (0)

CSL SMG CODING inquiry

Hey Guys,

So i just got a dyno tune for my car, which included the CSL ECU and CSL SMG module tunes. The car drives great, but when i down shift (while braking), the car engine brakes immediately... no blip whatsoever. I almost get tossed into the windshield, that how hard the engine braking is. In S3, it seemscto blip correctly, but anything above that, its a violent jerk forward.

Has anyone else experienced this? Does the ECU have to adapt?

Thanks in advance!
Appreciate 0
      04-05-2020, 06:28 PM   #2
Andrew
Moderator
Andrew's Avatar
United_States
229
Rep
423
Posts

Drives: E46 M3 / E92 M3
Join Date: Mar 2012
Location: Irvine, CA

iTrader: (1)

Garage List
2003 BMW M3  [0.00]
2008 BMW M3  [0.00]
CSL ECU? So I'm assuming you're running a CSL air box. Sounds like the transmission is downshifting without blipping the throttle. Right? So do you feel the same thing, but worse, when you down shift without braking?

I'm moving this to the Coding and Tuning section.
__________________
[Track] 03 AW/CIN 6MT E46 M3
[Street] 08 AW/FR 6MT E92 M3
[Tow/Overland] 18 Toyota Tacoma Off-Road
Appreciate 0
      04-05-2020, 08:08 PM   #3
x Spades x
Second Lieutenant
34
Rep
229
Posts

Drives: BMW E46 M3
Join Date: Feb 2020
Location: CT

iTrader: (0)

Quote:
Originally Posted by Andrew View Post
CSL ECU? So I'm assuming you're running a CSL air box. Sounds like the transmission is downshifting without blipping the throttle. Right? So do you feel the same thing, but worse, when you down shift without braking?

I'm moving this to the Coding and Tuning section.
Thanks Andrew.

Yes, i have the CSL airbox with working flap. My ecu was converted to the csl version (h bridge). Yes, its the same feeling as downshifting without touching anything. So is no blip, just kill myself engine strain
Appreciate 0
      04-05-2020, 08:40 PM   #4
Andrew
Moderator
Andrew's Avatar
United_States
229
Rep
423
Posts

Drives: E46 M3 / E92 M3
Join Date: Mar 2012
Location: Irvine, CA

iTrader: (1)

Garage List
2003 BMW M3  [0.00]
2008 BMW M3  [0.00]
Quote:
Originally Posted by x Spades x View Post
Thanks Andrew.

Yes, i have the CSL airbox with working flap. My ecu was converted to the csl version (h bridge). Yes, its the same feeling as downshifting without touching anything. So is no blip, just kill myself engine strain
I would check the CSL SMG parameters. Definitely should rev-match downshift. You can also try ECUWorx's MSS54/HP tool to enable CSL interetia update and make sure rev matching is enabled.
__________________
[Track] 03 AW/CIN 6MT E46 M3
[Street] 08 AW/FR 6MT E92 M3
[Tow/Overland] 18 Toyota Tacoma Off-Road
Appreciate 0
      04-05-2020, 09:54 PM   #5
x Spades x
Second Lieutenant
34
Rep
229
Posts

Drives: BMW E46 M3
Join Date: Feb 2020
Location: CT

iTrader: (0)

Quote:
Originally Posted by Andrew View Post
I would check the CSL SMG parameters. Definitely should rev-match downshift. You can also try ECUWorx's MSS54/HP tool to enable CSL interetia update and make sure rev matching is enabled.
I have Martyn's tool. When i upload my bin, CSL intertia and downshift blips are greyed out... :-(.
Appreciate 0
Post 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



All times are GMT -5. The time now is 01:05 AM.




e46m3
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
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