[slubu]

My coworker has a 335 he leased in June 07. He has not had his progman updated. Today I convinced him to go out and drive each other's cars to see what this whole turbo lag issue is all about that has affected post 29.2 updated people, and potentially is affecting some MSD81 owners.

Well I am happy to report that our cars felt exactly the same. Both were just as responsive in various tests, and suffered what seemed like the same lag upon WOT at low RPMs, probably to just let the boost build. Additionally, he said he did not feel my car was any different than his. Both of us are 6MT.

At least in my situation, MSD81 has not induced the lag associated with 29.2. Or if it has it was so minute that I did not notice it, and therefore am not concerned about it. I do know that people have complained with MSD81 and the 135, and obviously 29.2+ MSD80s. I'm curious if any other 335 MSD81's think they have lag. After driving both cars back to back, I have finally and happily reached the conclusion that I do not have this dreaded lag problem. My hearts go out to the 29.2 guys...

My only thought is that it could potentially be a software fix to address something in MSD80 cars that does not impact MSD81 guys, or the early MSD81 guys have a version prior to 29.2. But that's beyond my expertise.

[e90AW335i]

I told you bro....

[mistermojorizin]

i'm developing 2 theories:

1st theory: v81+29.2 = no lag, but v80+29.2 = lag - have been seeing a lot of people with v81 perfectly content but people with v80 reporting lag. Mine is a v80 and it has lag, but i'm not sure if it has v29.2. but if it does, that would explain the lag.

2nd theory: there is a 3rd factor that's causing some cars to have lag and some not to have lag, whether they are pre or post 29.2 (like fuel pump malfunction or wastegate malfunction). This theory would explain a post i read from 2006 that said the 335 has lag.

slubu, does your car have the burbuling/popping exhaust people mention with 29.2? I don't think mine does.

[Tobias1980]

Originally Posted by mistermojorizin

i'm developing 2 theories:

1st theory: v81+29.2 = no lag, but v80+29.2 = lag - have been seeing a lot of people with v81 perfectly content but people with v80 reporting lag. Mine is a v80 and it has lag, but i'm not sure if it has v29.2. but if it does, that would explain the lag.

2nd theory: there is a 3rd factor that's causing some cars to have lag and some not to have lag, whether they are pre or post 29.2 (like fuel pump malfunction or wastegate malfunction). This theory would explain a post i read from 2006 that said the 335 has lag.

slubu, does your car have the burbuling/popping exhaust people mention with 29.2? I don't think mine does.

+1 on the 2nd theory. I beliave the combination of earlier engines and 29.2 is the problem. There has been changes in the engine hardware, as an example of this I can tell you that the turbo package is in its third revision.

[Bubbles]

My car has burbled since the Dinan Flash in Dec. 2007. I was updated to 30.0.02 and the burble is still there, but a bit more subdued.

Slubu with a 6mt you should not have much of a lag issue, however 6at have a problem.

[Bubbles]

Originally Posted by Tobias1980

+1 on the 2nd theory. I beliave the combination of earlier engines and 29.2 is the problem. There has been changes in the engine hardware, as an example of this I can tell you that the turbo package is in its third revision.

What else do you know about the Ver. 3 turbos?

[ezatnova]

Originally Posted by mistermojorizin

i'm developing 2 theories:

1st theory: v81+29.2 = no lag, but v80+29.2 = lag - have been seeing a lot of people with v81 perfectly content but people with v80 reporting lag. Mine is a v80 and it has lag, but i'm not sure if it has v29.2. but if it does, that would explain the lag.

2nd theory: there is a 3rd factor that's causing some cars to have lag and some not to have lag, whether they are pre or post 29.2 (like fuel pump malfunction or wastegate malfunction). This theory would explain a post i read from 2006 that said the 335 has lag.

slubu, does your car have the burbuling/popping exhaust people mention with 29.2? I don't think mine does.

I am starting to buy into the MSD80 + 29.2 theory now too.

Also, on the exhaust popping, the 135 has a much different exhaust system than the 335, so you could very well not have the popping we are getting through our left pipes.

[slubu]

What is this exhaust popping/burble you guys are talking about? I may have it but I need more of an explanation. Ezatnova can you explain the popping you mention through your left pipe.

[Joeyballs]

my msd81 may 2008 build e92 has no concernable lag. I made a post about it a couple months ago.

I think the msd80 29.2 guys are feeling something I'm not. If I smash on the pedal below 1500 rpm without down shifting there is a pause/lag and I have trouble believing that never existed in any of these cars. It's so minor its expected.

[stressdoc]

Originally Posted by Tobias1980

+1 on the 2nd theory. I beliave the combination of earlier engines and 29.2 is the problem. There has been changes in the engine hardware, as an example of this I can tell you that the turbo package is in its third revision.

Hi Tobias, any details/facts regarding the revisions to the turbo systems would be of great interest.

[MMakoto]

Originally Posted by slubu

What is this exhaust popping/burble you guys are talking about? I may have it but I need more of an explanation. Ezatnova can you explain the popping you mention through your left pipe.

start the engine, then rev to 3k rpm and let loose of the accelerator, you'll hear that burping sound right away from your left pipe. when you're driving on 1st gear, and you accelerate higher than 3k rpm to 2nd gear, it is less noticeable. just cruise around the block w/ no radio and windows down, then you'll know.

my car is 09/2006 built, and i recently had an update on the dme (should be msd81), fuel pump, and progman 30.0.2. i noticed the burping sound right away when i drove my car out from the lot, and it sounds louder than before too. it doesn't bother me THAT much yet, but we'll see.

[slubu]

My exhaust is loud and throaty and I love it. I don't think I have that burple or whatever. What I do have though, is when I start the car, about 1 second later I hear this rattle coming from the left exhaust pipe for about 1 second. Like a popping sound. Anyone have that?

[MMakoto]

Originally Posted by slubu

My exhaust is loud and throaty and I love it. I don't think I have that burple or whatever. What I do have though, is when I start the car, about 1 second later I hear this rattle coming from the left exhaust pipe for about 1 second. Like a popping sound. Anyone have that?

when i start my car, only the right pipe is active, then 30-45 seconds later, i hear the pop sound from the left pipe, and now both pipes are active. so yours is acting much faster than mine. i don't see any problems with yours or that 1 second delay.

[Tobias1980]

Originally Posted by stressdoc

Hi Tobias, any details/facts regarding the revisions to the turbo systems would be of great interest.

My friend in Sweden just got his turbo system replaced due to wastegate problems. He has an early built E91. He told me that BMW had changed parts number 3 times for the hardware according to the BMW shop who performed the replacement.

My friend got 29.2 and new hardware now and describes his car as "better than new, with amazing power" He used to have V2 but now he states that it doesn't feels like he need it anymore

[slubu]

Originally Posted by MMakoto

when i start my car, only the right pipe is active, then 30-45 seconds later, i hear the pop sound from the left pipe, and now both pipes are active. so yours is acting much faster than mine. i don't see any problems with yours or that 1 second delay.

So essentially I somehow have the golf tee mod already built in?

[Bubbles]

Originally Posted by Tobias1980

My friend in Sweden just got his turbo system replaced due to wastegate problems. He has an early built E91. He told me that BMW had changed parts number 3 times for the hardware according to the BMW shop who performed the replacement.

My friend got 29.2 and new hardware now and describes his car as "better than new, with amazing power" He used to have V2 but now he states that it doesn't feels like he need it anymore

Well, I have new turbos and indeed notice a difference. I'm waiting on the paper work to get the part numbers.

[RBBMWE46M3]

Man all this talk about loud exhausts and burble, my car is as quiet as a field mouse. No popping or burbling.The car I test drove back in March (07 335xi sedan) had a great sounding exhaust. My car, though not offenseve, is quiet and has very little sound, very muffled. I wish I had some noise from my car. Not the buzz bomb sound like a bumble bee like the punk ass kids around here, but, the sound out of the test car I drove out of mine would be nice

I hate to ask this question, but, how do I know which dme version I have? My car is an march order early June delivery (08) sorry about the nooby question

[Bubbles]

Originally Posted by RBBMWE46M3

Man all this talk about loud exhausts and burble, my car is as quiet as a field mouse. No popping or burbling.The car I test drove back in March (07 335xi sedan) had a great sounding exhaust. My car, though not offenseve, is quiet and has very little sound, very muffled. I wish I had some noise from my car. Not the buzz bomb sound like a bumble bee like the punk ass kids around here, but, the sound out of the test car I drove out of mine would be nice

I hate to ask this question, but, how do I know which dme version I have? My car is an march order early June delivery (08) sorry about the nooby question

Coupes are louder than sedans.

[RBBMWE46M3]

Originally Posted by Bubbles

Coupes are louder than sedans.

really? How are the exhausts different other than the route or path from cats to tips???

[cliverman]

Originally Posted by Joeyballs

my msd81 may 2008 build e92 has no concernable lag. I made a post about it a couple months ago.

I think the msd80 29.2 guys are feeling something I'm not. If I smash on the pedal below 1500 rpm without down shifting there is a pause/lag and I have trouble believing that never existed in any of these cars. It's so minor its expected.

+1
April 2008 build e90 has no concernable lag
I'm guessing that I have msd81 and 29.2.

[benyl]

Originally Posted by RBBMWE46M3

really? How are the exhausts different other than the route or path from cats to tips???

coupes don't have resonators.

[mistermojorizin]

Originally Posted by slubu

My exhaust is loud and throaty and I love it. I don't think I have that burple or whatever. What I do have though, is when I start the car, about 1 second later I hear this rattle coming from the left exhaust pipe for about 1 second. Like a popping sound. Anyone have that?

yea my car makes a little metallic sound at 1,000 rpm in 2nd gear - whether i'm going up in rpms or down in rpms, and i believe its that flap opening. i also hear the sound in 3rd gear but at a different rpm - i haven't figured out which. no ting sound in 1st.

but this is different than the burble people are describing with 29.2