BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
NOLIMITS NoPhoto
Post Reply
 
Thread Tools Search this Thread
      08-03-2011, 02:32 AM   #1
lukester
First Lieutenant
Germany
111
Rep
330
Posts

Drives: BMW M3
Join Date: Feb 2011
Location: Munich, Germany

iTrader: (0)

Question How long does the ECU need to learn after a mod? Can this be resetted?

Hi guys,

I'm running the complete Akrapovic exhaust for some weeks and installed the MS pulleys and the MS Intake Stage 2 yesterday.

For the install of the pulleys and the Intake Kit we unplugged the battery to be sure.

How long does the ECU adapt? As after starting and running the car yesterday evening for ~20miles I can say ... it pulls hard and feels good but if I didn't know that we installed the pulleys and the intake kit I'm not sure I could tell.

Looking for an idea to understand the ECU. Will this be resetted if unplugged from the battery for 3-4 hours?
Even if not unplugged and you change something. Has anybody an idea how long it takes until it completely adapted the new "environment".
Appreciate 0
      08-03-2011, 02:52 AM   #2
3XTR3M3
Lieutenant Colonel
3XTR3M3's Avatar
United_States
58
Rep
1,577
Posts

Drives: E92 AW M3 6MT
Join Date: Aug 2006
Location: LA

iTrader: (1)

I think the vehicle adapting to mods is based on actually driving and configuring itself in the real world.
__________________
Appreciate 0
      08-03-2011, 03:19 AM   #3
lukester
First Lieutenant
Germany
111
Rep
330
Posts

Drives: BMW M3
Join Date: Feb 2011
Location: Munich, Germany

iTrader: (0)

so that means it's a never ending adaption process.
before this M3 my last "project" was a race ready supercharged Challenger SRT8 where disconnecting the battery as well as reflashing the ECU with the tune helped a lot to reset all adaptions and to bring the real power and responsiviness back again.

Any ideas if this is needed with the e9x M3s?
Appreciate 0
      08-03-2011, 04:15 AM   #4
saeedg48
Brigadier General
United_States
175
Rep
3,547
Posts

Drives: Porsche 991.1 GT3
Join Date: Nov 2008
Location: Unknown

iTrader: (1)

after i tuned my car i noticed it right away.
__________________

2008 M3 Sedan + catless + Tune
2012 CLS63 AMG
2014 M6 Coupe + catless + KW V3

2015 Porsche GT3
Appreciate 0
      08-03-2011, 09:53 AM   #5
Taz@Evolve. P
BimmerPost Supporting Vendor
Taz@Evolve. P's Avatar
11
Rep
349
Posts


Drives: Quick enough
Join Date: Apr 2011
Location: US

iTrader: (1)

You will need to either reset the adaptations manually (using a tool such as the Bav Tec, or soon, our own tool) or simply drive for a while to let it adapt on it's own unfortunately.
Appreciate 0
      08-03-2011, 09:58 AM   #6
lukester
First Lieutenant
Germany
111
Rep
330
Posts

Drives: BMW M3
Join Date: Feb 2011
Location: Munich, Germany

iTrader: (0)

Quote:
Originally Posted by Paul@Evolve View Post
You will need to either reset the adaptations manually (using a tool such as the Bav Tec, or soon, our own tool) or simply drive for a while to let it adapt on it's own unfortunately.
hmm. sounds familiar with the Challenger ECU. But shouldn't a complete reflash of the ECU with e.g. your Akrapovic tune reset adaptions, too?
Appreciate 0
      08-03-2011, 11:32 AM   #7
Sales@Evolve
BimmerPost Supporting Vendor
29
Rep
1,064
Posts


Drives: Slow
Join Date: Feb 2008
Location: Luton, Bedfordshire

iTrader: (0)

Quote:
Originally Posted by lukester View Post
hmm. sounds familiar with the Challenger ECU. But shouldn't a complete reflash of the ECU with e.g. your Akrapovic tune reset adaptions, too?
No, all adaptions are not reset with a flash.
Appreciate 0
      08-03-2011, 11:39 AM   #8
sales@ESSTuning
sales@ESSTuning's Avatar
193
Rep
3,155
Posts

Drives: ESS M3 / M4
Join Date: May 2007
Location: AZ

iTrader: (6)

Adaptation on this ECU is fairly quick. Simply drive the car and it will self correct as much as it can given conditions, mods etc.. There are some changes the ecu cannot correct such as power changes at certain RPM's due to some exhaust system designs and major changes such as displacement and forced induction. For these you will need to look into tuning options to correct.
Appreciate 0
      08-03-2011, 11:50 AM   #9
Sales@Evolve
BimmerPost Supporting Vendor
29
Rep
1,064
Posts


Drives: Slow
Join Date: Feb 2008
Location: Luton, Bedfordshire

iTrader: (0)

Quote:
Originally Posted by lukester View Post
Hi guys,

I'm running the complete Akrapovic exhaust for some weeks and installed the MS pulleys and the MS Intake Stage 2 yesterday.

For the install of the pulleys and the Intake Kit we unplugged the battery to be sure.

How long does the ECU adapt? As after starting and running the car yesterday evening for ~20miles I can say ... it pulls hard and feels good but if I didn't know that we installed the pulleys and the intake kit I'm not sure I could tell.

Looking for an idea to understand the ECU. Will this be resetted if unplugged from the battery for 3-4 hours?
Even if not unplugged and you change something. Has anybody an idea how long it takes until it completely adapted the new "environment".
Disconnecting the battery does not reset the adaptions.

An intake and pulley is a small gain in power. From the particular products you have I know where they come from and they are going to do something.

Some people will install a filter and come back saying ..... WOW..... car pulls so much harder it's unreal!
Same thing will pulley......... man, it really is so much more free revving!

There isn't exactly much to adapt to with these two upgrades. Intake temperatures are taken care of by AIT sensor, any minimal increase in RF will be taken in to account very quick and I doubt there is much change to the lambda anyway but that would be dealt with real quick too.

To fully understand the ECU will take someone to write a huge essay but to get a general idea (which is way more than anyone on here has right now!) it would be fairly doable so that everyone understand it.

Just do not lose sight on the basics....... engine's have not changed and ignition, fuel and cam timing are still the major basic tuning factors.
Appreciate 0
      08-03-2011, 03:33 PM   #10
Singletrack
4th down; 4th quarter? Renegade.
Singletrack's Avatar
United_States
49
Rep
3,826
Posts

Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

iTrader: (3)

Quote:
Originally Posted by Paul@Evolve View Post
You will need to either reset the adaptations manually (using a tool such as the Bav Tec, or soon, our own tool) or simply drive for a while to let it adapt on it's own unfortunately.
That's great news : )
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
Forum Jump


All times are GMT -4. The time now is 05:21 PM.




m3post
m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, 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