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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Has anyone contacted BMW regarding 29.2 and lag?



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      11-08-2013, 05:05 PM   #4907
Dackelone
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Quote:
Originally Posted by Pseudo Nim View Post
Uh... Wasn't this fixed with the v31 update? And they're up to like v46 now
IDK... a lot of the 135i guys with N54/N55's are experiencing "gutted" performance after BMW "updates" their DME software. Mainly loss of throttle response due to the wastegates remaining open more as you drive. They have also noticed a much quieter engine than what they had before the SW update.


TT3 iN NyC thanks, but I already have a tune(but its not yours).

I was mainly asking on behalf of the 135i guys with N54/N55 engines. Seems there are an awful lot of unhappy people when they get their car's back from BMW after a SW update.
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      11-08-2013, 05:27 PM   #4908
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If you have say a cobb tune, will it not totally override any BMW software updates making this issue irrelevant? Or do the bmw updates somehow affect your tune after you go back and re-install the tune after a bmw update?
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      11-08-2013, 06:25 PM   #4909
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Quote:
Originally Posted by nikitino25 View Post
If you have say a cobb tune, will it not totally override any BMW software updates making this issue irrelevant? Or do the bmw updates somehow affect your tune after you go back and re-install the tune after a bmw update?
If you have a tune you'll be fine.
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      11-09-2013, 05:20 AM   #4910
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The tunes only override the specific areas of the software that they need to use to achieve their results. If the BMW software update is newer than the tune then there is a chance that the tune may not override the BMW software. This would happen if BMW were trying to block tunes and put in new safeguards(this is just an example and I am not saying that they have) In the past it has been said that they relocate certain code to other areas in order to hide them.
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      05-16-2014, 03:07 PM   #4911
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Sorry for this necro post.

I own a 01/2007 335i (euro), and i strongly suspect i got a software version with the waste gate ratle fix ( leaving 1 waste gate a bit open a lower rpm)
If you look at my dyno you can see it builds torque till 3000 opm and then hitting full boost...
does the latest software version gets rid of this issue ? Or how do i ask bmw to get rid of this abbomination ?

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      05-16-2014, 06:09 PM   #4912
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Is there a way to get our cars back to the 2007 software?
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      05-17-2014, 03:20 PM   #4913
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Quote:
Originally Posted by ThatRWD
Is there a way to get our cars back to the 2007 software?
Get a tune...
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      05-18-2014, 01:22 AM   #4914
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Quote:
Originally Posted by ihc95 View Post
Get a tune...
that is not true,

A tuner can not acces the wastegate solenoid management.
A tuner can acces things like boost, fuel, timings etc...
Pre 2007, one waste gaste was always closed during WOT on low rpm's. The newer software always leaves both waste gates a bit open, thus introducing less torque wich is perceived as lag, because at 3000 rpm the waste gate behavior is normal again. (you can see it clearly on my dyno)

I was just wondering if even the most recent updates still have this "wastegate fix"
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      05-18-2014, 08:49 AM   #4915
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As far as I understand, BMW has a flash to fix the lag, there is a TSB about it. I have not verified this but one of these days I will go to BMW to get rid of the 29.2...I would rather have rattle and deal with that other ways.
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      05-20-2014, 12:12 PM   #4916
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Quote:
Originally Posted by Odan.be View Post
that is not true,

A tuner can not acces the wastegate solenoid management.
A tuner can acces things like boost, fuel, timings etc...
Pre 2007, one waste gaste was always closed during WOT on low rpm's. The newer software always leaves both waste gates a bit open, thus introducing less torque wich is perceived as lag, because at 3000 rpm the waste gate behavior is normal again. (you can see it clearly on my dyno)

I was just wondering if even the most recent updates still have this "wastegate fix"
first of all you can absolutely affect the position of the wastegates with a number of the piggybacks and/ or obd flashed tunes.

secondly - if you want your car back to performance prior to 29.2 you need to go tell your service advisor you are not happy with the responsiveness of the new (this is years old already) DME version and that you want them to plug in the car and click the "revert wastegate operation" button. i had this whole experience years ago and 29.2 is a real let down until you have them undo the wastegate "fix"
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      05-20-2014, 12:54 PM   #4917
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Quote:
Originally Posted by davidkotok
]first of all you can absolutely affect the position of the wastegates with a number of the piggybacks and/ or obd flashed tunes.

secondly - if you want your car back to performance prior to 29.2 you need to go tell your service advisor you are not happy with the responsiveness of the new (this is years old already) DME version and that you want them to plug in the car and click the "revert wastegate operation" button. i had this whole experience years ago and 29.2 is a real let down until you have them undo the wastegate "fix"
And even the latest update ( dunno the number) always installs the "waste gate fix" ?
Or did they remove that in the latest versions ? Or do you still have to remove it .. even with the latest and most current versions ?


Grtz !
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      05-20-2014, 01:42 PM   #4918
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So when everything is perfect how does the turbo lag feel ?
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      05-29-2014, 07:38 AM   #4919
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When everything is perfect you ask yourself, what is this turbo lag people are talking about because you do not have it. Very few people are still around that have experienced the car in its original state prior to BMW fixing it by inducing the lag.
As far as the Dyno posted above, if you compare it to the original BMW Sales brochure Dyno you are doing better because the original dyno torque peaked at 1500 and stayed there. Your dyno has the initial spike at the beginning(about 250 rpm late but then continues to climb and your HP has a steady increase.
Scroll down this page to see the original Dyno that BMW used to sell the cars.
http://www.e90post.com/forums/showth...ht=v30&page=36

A lag dyno would look pretty similar but shift to the right on the rpm axis so the spike hits at 3000 rpm or above. that is lag. Hit the gas, wait for it to hit 3000 rpm or more then feel it pull.
Not lag: hit the gas and be shoved back in your seat before 2000 rpm
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      05-29-2014, 08:12 AM   #4920
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The rattle that accompanies the problem is due to the wastegates not closing completely and they flap. The wastegates not closing will result in the turbos not functioning properly and a serious power reduction. If anyone has eve had Limp mode, you know the feeling. When they close is when you feel the surge. I am not aware that they can be partially open. From what I know of them they are either open or closed or flapping in the breeze but they cant be open partially. The amount of time and when they open can be controlled by the software but not how much they are open.
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      06-14-2014, 08:36 PM   #4921
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Going in for the fix and jerky transmission shifts from a cold stop on Monday will report back
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      01-22-2015, 12:12 PM   #4922
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Quote:
Originally Posted by ThatRWD View Post
Going in for the fix and jerky transmission shifts from a cold stop on Monday will report back
Well last time I took it in, the tech/sa apparently wasn't listening and only did the TCU update. Taking it in again to BMW of Fairfax this time, hopefully things get resolved. Will post an update .

No one replied last time so I figured there wasn't much interest but enthusiasts and people who care about their car shouldn't let this thread die!
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      01-23-2015, 09:04 PM   #4923
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Hmm Alexandria just seems to be wasting my time, guess I'll be doing it myself.

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      06-30-2015, 02:41 AM   #4924
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any extra lag thgen dude?
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      09-23-2015, 07:16 PM   #4925
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Just wanted to let everyone know that there is an option in ISTA /P for "wategate conversion," which programs them to function as on the pre-29.2 software.
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      11-11-2015, 02:11 PM   #4926
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Checking in for old time's sake. Hope everyone is non-laggy and doing well.

Wonder if this old thread will ever hit 5000?
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      11-11-2015, 02:32 PM   #4927
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Quote:
Originally Posted by iScream View Post
Checking in for old time's sake. Hope everyone is non-laggy and doing well.

Wonder if this old thread will ever hit 5000?
I ended up just getting a Stage II sw tune from a German company. That solved all my problems.
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      01-31-2016, 01:05 PM   #4928
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How can I tell if I have 29.2 or not? Is that the version of the update?
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