BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      06-17-2008, 10:29 AM   #23
itsthechuck
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If that is the problem I don't see how the RR downpipes will fix it, I don't think the downpipes should effect the wastegates. Could probably fix it with some software, I know on my standalone on my WRX I could play with the wastegate duty cycle.
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      06-17-2008, 10:42 AM   #24
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The downpipes will avoid the problem not fix it. The idea would be to use DPs only with no software. Resonable gain without messsing with the ECU.
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      06-17-2008, 10:48 AM   #25
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Anyone know what's BMW stance on this issue - do they care about the new lag?
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      06-17-2008, 10:54 AM   #26
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Well, they're the ones who issued the software, so I can only assume they see this as an acceptable tradeoff.
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      06-17-2008, 10:57 AM   #27
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We have to remember that as an enthusiast community, we still represent a small minority of all N54 engine owners/prospective buyers.

I would guess that many, if not most, owners/buyers will not notice the change. Or if they do, they will not really care about it too much.

N.B.: I have not driven a car with 29.2 or V81, so I'm really just guessing here.
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      06-17-2008, 10:59 AM   #28
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From what I have read, Shark Edit should be able to remove the problem and add extra power. Patience grasshopper. JMHO
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      06-17-2008, 11:16 AM   #29
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I know we only represent a small amount of overall buyers of the 1 but, turbo lag is never a good thing. I would really be interested in seeing a review with the "upgrade"
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      06-17-2008, 01:11 PM   #30
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well...theres no way im not going dinan now.
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      06-17-2008, 02:26 PM   #31
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If anyone here is able to run pre and post 29.2 and post impressions, that would be awesome.
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      06-17-2008, 03:37 PM   #32
gan08
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Quote:
Originally Posted by EODGUY View Post
If anyone here is able to run pre and post 29.2 and post impressions, that would be awesome.
That would be me..
My 135 is Feb08 build and I was really impressed with the low end torque until the software update for the Alarm installation.

I'm not a performance driver, but I can tell the difference in 1st and 2nd gear start. Lack of power below 3k rpm.

I reported to my SA, and got replied that maybe the weather temp got warmer and taht's why it feels slower. Well, maybe that's the reason?
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      06-17-2008, 04:55 PM   #33
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I'm sitting here reading this link to the $26K engine blow up (on a modded leased car no less) when I realize.. this is my town.. my dealership.. and it just happened. Too close to home. I think I'll stick to suspension tweaks.
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      06-17-2008, 04:57 PM   #34
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I have a Apr/May build. Is that 29.2? I have great power across the RPM spectrum.
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      06-17-2008, 07:07 PM   #35
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I like how they think the engine is magnesium...
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      06-17-2008, 07:19 PM   #36
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Quote:
Originally Posted by RiXst3r View Post
The turbo lag is caused by the changes the bmw made to the wastegate duty cycle at low engine loads, or cruise, idle to address wastegate rattling.

Basically when the N54 was released, several people noticed that the wastegates on this car were normally CLOSED, meaning that as soon as you hit the gas, you were already spinning the turbines. BMW made a change in the march 2008 software to address the issue with rattling wastegates, so now the wastegate stays open, and has to close first before boost can build... this is the lag. The wastegate being open also causes the car to sound louder, and more "burbley" at idle/cruise...

I am flat out refusing all software updates of any kind until this issue is resolved. It IS a real issue, and there have been hundreds of complaints. Some dealers have even removed the new software from their computers because of complaints.

-Rick

That's the first time I've really seen a solid explaination for this issue. Thanks. :thumbup:


That would explain the lag that I've noticed. I have been wondering to myself how all these magazine writers who drive cars for a living could say things like "there is zero lag" when there is very obvious lag under certain circumstances.

It's at it's worsts when you let off the gas in the upper RPM range (such as pulling along side another fast car at 50MPH in second gear), and then nail it. If there's a delay in the wastegate closing, that makes perfect sense.

I don't like it, but at least now I understand it. :w00t:
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      06-17-2008, 08:05 PM   #37
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The issue raised by the OP has nothing to do with aftermarket mods. This is a software patch from BMW that people are complaining.

Here's a thread: http://www.e90post.com/forums/showthread.php?t=147781
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      06-17-2008, 08:39 PM   #38
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let me get this straight - this 3k rpm lag only happens when car is in 1st gear?!....
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      06-17-2008, 09:02 PM   #39
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Passed this on to Autoblog. I'm so sick of companies playing this ridiculous game. The true fans always suffer. Hopefully something will come of this.
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      06-17-2008, 09:07 PM   #40
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Quote:
Originally Posted by JuggernautTCW View Post
let me get this straight - this 3k rpm lag only happens when car is in 1st gear?!....
For me, I notice it in 1st and then to a lesser extent in 2nd. From 3rd on, the engine pulls from just below 2k.
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      06-17-2008, 09:07 PM   #41
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What ridiculous game? Protecting their product? Protecting themselves from false warranty claims?
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      06-17-2008, 09:30 PM   #42
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Wow, I know this sounds alarmist, but being that my car is being built right now it gives me pause.
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      06-17-2008, 10:13 PM   #43
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Quote:
Originally Posted by dma550 View Post
Wow, I know this sounds alarmist, but being that my car is being built right now it gives me pause.
I'm in the same situation. I love how my 335 pulls, and the 135 is being built now. I"m not at all happy about having lag built into my car. I can't wait for the magazine to start doing some comparison's with the A4/5 and start bitching about the lag they now feel.
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      06-17-2008, 10:14 PM   #44
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Quote:
Originally Posted by Mad Dragon View Post
I like how they think the engine is magnesium...
You do realize the outer block is magnesium right?
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