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BMW 3-Series (E90 E92) Forum
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Has anyone contacted BMW regarding 29.2 and lag?
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10-14-2008, 01:57 PM | #2245 |
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thanks man for info we will wait news from you, by the way this is hard to believe sometimes you should listen other people "Don't fix something that's not broken.." i am applying this to me and to some others maybe
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10-14-2008, 02:49 PM | #2246 |
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I have 335i e90 and enjoying few months of pre 29.2 ride and after that my car was upgraded to 30.0.2 and we all know what it did.
Yesterday I tried the DS mode after long time and wow..the ride was exellent. There was no lag and pickup was even better then pre 29.2 software. Not sure why we don't have all the wastegate issues in DS mode. I am thinking about driving my car in this mode till the problem is fixed. Anybody drawback with driving in DS. I think I might get low mileage. I have not seen the DS mode discussed here, is it because most people on this thread are with Manual. Thanks |
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10-14-2008, 02:57 PM | #2247 | |
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One of them is on a really sweet diet too. (Hold up your old pants, man!) |
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10-14-2008, 03:11 PM | #2248 | |
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10-14-2008, 04:40 PM | #2249 |
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shiv just posted that his car doesn't have the laggy software update any longer
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10-14-2008, 04:54 PM | #2250 | |
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10-14-2008, 04:59 PM | #2251 | |
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Pavel - you've been quiet, have you made progress with your car or have you dumped it?
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10-14-2008, 05:01 PM | #2252 |
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10-14-2008, 05:04 PM | #2253 | |
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he didn't say anything about msd81/30.2. this is what he said today in the 3.1 beta thread:
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10-14-2008, 05:18 PM | #2254 |
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10-14-2008, 05:33 PM | #2255 |
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It sounds like Shiv is saying those with MDS80 experience the biggest lag problem.
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10-14-2008, 05:40 PM | #2256 |
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Here is his post in response to my questions of "WTF?"...
"Since getting the new MSD81 ECU, I can't honestly say that I feel any excessive lag. I've looked at wastegate duty cycle during idle, cruise and light load conditions and they are all similar to with what I saw when the car was new running the earlier progman versions. The only time I was able to quantify a noticeable loss of boost response along with a loggable reduction in duty cycle was with the most recent update to the MSD80 ECU when duty cycles at idle were in the 10-15% (instead of 40-50% range) Shiv __________________ " This is mind boggoling, baffling, painful to comprehend, and confusing...all at the same time. Obviously this goes against quite a bit of feeback that we have gotten from all of you owners out there with newers cars (V81) who are right here with us, ranting about the POS progman and lag. Given that fact, I would discount what one person says about their one experience vs many with a very different experience. However, this one person also has the rare capability to log his wg duty cycle values. Very frustrating. Have any of you guys driven identical cars (transmission wise, MT/AT), both laggy, but one V80 29.2+ and one V81 29.2+? I would love for you to expand on your thoughts and confirmations, etc, of whether they felt exactly the same to you. |
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10-14-2008, 06:04 PM | #2257 | |
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Dumping in progress. |
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10-14-2008, 06:06 PM | #2258 |
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That's sad. Hopefully you're not getting hosed on the deal...
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10-14-2008, 06:15 PM | #2259 |
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Just a hunch, but it would not surprise me if the 'adaptable' (i.e., dynamically flexible) aspects of the Progman control were responsible for some of the variable lag responses that are evident.
It is possible that Progman 29.2+ has different effects in the MSD80 & 81. Perhaps by design, given the mechanical and material problems of the earliest version of the turbos that may need more "protection."
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10-14-2008, 06:16 PM | #2260 |
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I apologize to the 1 series owners. I was not trying to say you dont have lag or that it is less than mine, I was asking to findout, not to discredit. I am sorry if it was misinterpreted.
Shivs post confused me a bit. When he saiys getting the new MSD81 ECU, was it put into a previously lagging car or was this part of a whole new car?
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10-14-2008, 06:17 PM | #2261 |
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10-14-2008, 08:46 PM | #2262 |
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Shiv's comments do kind of echo what I've been thinking for a while. I drove my MSD81 back to back with a coworker's MSD80 pre 29.2 and I did not notice much of a lag difference. I've never driven a post 29.2 MSD80. To be honest I would not say I have full torque at 1400 rpms, but also I don't think I would ever lose to a smart car.
I would not be surprised if MSD80 pre 29.2 has a bit less lag than MSD81, but MSD80 post 29.2 has much greater lag than both. I have no idea what to make of the 135 people though. I'm starting to think it may be more of a software impact on a hardware variance.
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10-14-2008, 09:09 PM | #2263 |
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I had a 135i as a loaner for 3 days, it only had 200 miles on it. I did not notice any sort of lag, it was like my car before the 29.2. I even test drove a few before getting my 335i, and don't remember any lag in the 135i's. So, is this something that they are doing when they re-program our cars or do all the 08's have this lag problem.
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10-15-2008, 03:01 AM | #2264 |
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you know, I am not sure what causes this... but my car delays when I shift like 3rd to 4th or 4th to 5th at aournd 6500 RPM's while doing WOT runs at top speed. It only drops to like 5500 or something, and I do have the "modified" CDV from RR so I don't know what causes this. I also have grandma turned ALL THE WAY OFF meaning I hold it in for 3 seconds until I get the triangle with a circle around it.
Weird, I hate shift delays... |
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10-15-2008, 03:26 AM | #2265 |
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This is my experience too. I have lag (this is not present when the engine is cold - richer mixture or less lag?) but the car is not a total dog. Maybe the v80 and v81 DMEs make the engines respond differently during the lag-phase? In other words when NA the v81 responds better? Just trying to make some sense of all this.
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10-15-2008, 10:08 AM | #2266 |
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Failure.....
When I got to the garage they wanted to diagnose etc. They can only update if there's a problem. Had I been reading forums....... They road tested the car, said it was fine. They are now going to research the problem via their own internal forum. I asked them to get a statement from BMW as to whether 1s to 1.5s of lag at low revs in 3r / 4th gear is acceptable, especially as when the engine is cold lag is less than 0.5s. The strange thing is that driving home the lag characteristic is now different, it's more linear, it is still there but somehow the curve has changed so it's less noticeable. I wonder if they reset the throttle adaptation. How do you do this on the E9x? I knew how to do it on my E4x.
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