[mkaaes]

I was one of the first to have this problem in my 07 335i a few years ago. It lasted about 3-4 months as bmw and dinan "were" trying to find a solution. After a routine maintenance and having a few filters changed it went away.

[shortseller]

I have a Dinan S2 flash and just crossed 20k on the odometer, no oscolitons here. Very happy with my tune so far!

[Hangtime]

The problem with my car started after new BMW software was loaded last summer as part of the HPFP recall. Prior to that, I had no problems.

[tscdennab]

Originally Posted by bryce

lol


so because dinan costs 3x more than cobb, it's higher qualty? GTFO


i'd wager cobb's tune has hundreds more hours of r&d behind it. that's what I would call quality

Quality would mean a trouble-free tune.

I really don't want to start an argument, but have you failed to see the boost oscillations under 4000RPM on all Cobb logs ? Or the countless misfires that users are reporting ? Or the hesitations, limp modes, engine stops, etc. ? It seems that many people would trade all this for the ease of install and the lower price. But not everyone.

If you ask me, I don't think that right now Cobb is an alternative for Dinan users.

[deltalima0]

I originally bought a Dinan tune for my 07 and from experience it was the biggest waste of money for a tune IMHO. Knowing what I know now I would have never purchased it and probably the only item DINAN makes worth anything is the CAI but not at its price.

I do run Cobb stg2+ now and can tell you there is really no comparison to the two tunes except one is worth it in terms of performance and the other is a big waste.

[RoundelM3]

"i'd wager cobb's tune has hundreds more hours of r&d behind it. that's what I would call quality"

And you'd be both dead wrong and out some money. Dinan has years more experience than Cobb and was tuning BMWs long before Cobb started playing with Subarus.

BuraQ - let me know what you find out about that throttle oscillation correction - I get that too, on occasion. It's definitely throttle-related from the way it feels.

[Potty_Pants]

Originally Posted by sheedyslick

I researched the Dinan stage 2 software upgrade feverishly for about two weeks before my purchase and I haven't seen this issue out there. So, I find it kind of ironic that I've got to start this thread about what seems to be a known issue? I emailed this threads link to the Dinan technical representative that I spoke to so he can gather information.

SheedySlick,

ITS NOT NEW MAN... THEY KNOW ABOUT IT.. they wont get anything from these threads... I'll try to dig up the old one with the dyno in it... NASTY !

ppp


EDIT: Here's the links


http://www.e90post.com/forums/showthread.php?t=631860
http://www.e90post.com/forums/showthread.php?t=443171

same problem. DINAN FTMFL

[bryce]

Originally Posted by tscdennab

Quality would mean a trouble-free tune.

I really don't want to start an argument, but have you failed to see the boost oscillations under 4000RPM on all Cobb logs ? Or the countless misfires that users are reporting ? Or the hesitations, limp modes, engine stops, etc. ? It seems that many people would trade all this for the ease of install and the lower price. But not everyone.

If you ask me, I don't think that right now Cobb is an alternative for Dinan users.

my cobb stage 2+ logs are perfect. no misfires. no oscillations. no hesitations. no problems whatsoever.

the majority of cobb users have none of the issues you're referencing. yes, there are some users that do, but cobb easily has the largest market share of tunes on the n54. i'd bet the same percentage of users have issues with jb4, procede, GIAC, etc.

Originally Posted by roundel335

"i'd wager cobb's tune has hundreds more hours of r&d behind it. that's what I would call quality"

And you'd be both dead wrong and out some money. Dinan has years more experience than Cobb and was tuning BMWs long before Cobb started playing with Subarus.

BuraQ - let me know what you find out about that throttle oscillation correction - I get that too, on occasion. It's definitely throttle-related from the way it feels.

i was referencing n54 specific r&d. of course dinan has been around longer. cobb has exponentially more time developing the n54 specific tune than dinan. i'm pretty sure the dinan tune hasn't changed or been updated since it came out in 2007. that's pretty sad. it's a pretty basic, 12-13 psi tune that was created years ago, and you're arguing that it's better than cobb tunes that are constantly updated and improved upon?

who cares if dinan was tuning e30's, e36's, etc. before cobb was around. those cars have nothing in common with the e9x engine, except the basic i-6 layout. cobb has years more turbocharged tuning experience.

[bryce]

Originally Posted by tscdennab

Quality would mean a trouble-free tune.

I really don't want to start an argument, but have you failed to see the boost oscillations under 4000RPM on all Cobb logs ? Or the countless misfires that users are reporting ? Or the hesitations, limp modes, engine stops, etc. ? It seems that many people would trade all this for the ease of install and the lower price. But not everyone.

If you ask me, I don't think that right now Cobb is an alternative for Dinan users.

in addition, GIAC stage 2 has lots of problems. because there's less than a dozen forum members running that tune, you only hear about it from a few people.

[vasillalov]

Originally Posted by sheedyslick

I've had the Dinan stage 2 software mod on my 2010 335i E92 for about two weeks & 200+ miles. After the mod was completed i went to tear up some asphalt on the local interstate. I noticed that the turbo boost was not smooth during Wide Open Throttle while on the highway in 3rd 4th gear. It was more like a consistent short bursting boost. Two weeks and 200+miles later, it’s exactly the same.

Does it look like this? ..cause I've been getting the exact same thing that you are describing with Cobb ever since v3.00 beta came out.

v.3.01:


v. 4.01 beta:

[nafoo]

^^ +1

I have no issues with my Cobb tune. I raced a Dinan Stage 3 with the one of the first Cobb Stage 1 maps and all he could do was keep up...well except when we hit the highway.

Stage 2+ would have made him look stock, IMO

[vasillalov]

Originally Posted by bryce

my cobb stage 2+ logs are perfect. no misfires. no oscillations. no hesitations. no problems whatsoever.

the majority of cobb users have none of the issues you're referencing. yes, there are some users that do, but cobb easily has the largest market share of tunes on the n54. i'd bet the same percentage of users have issues with jb4, procede, GIAC, etc.

I beg to differ! Look at my previous post and logs. I know at least 5 people whom I talked to (one local) that have the exact same issue.

I wonder if Cobb will figure way around this.

[bryce]

Originally Posted by vasillalov

I beg to differ! Look at my previous post and logs. I know at least 5 people whom I talked to (one local) that have the exact same issue.

I wonder if Cobb will figure way around this.

5 people. out of thousands of cobb users. that was my point. every tune has a percentage of users with issues. i'm almost positive that your issue is hardware related, as my logs look nothing like yours and we're running the same software.


GIAC is not different, people have issues with that, too. only a handfull of people run GIAC, so it doesn't seem like that big of a deal.

[bryce]

vaseline- your solution will be to get protuned with a shop that has access tuner. your wastegates, soleniods, or something else is causing your issue. it's not a cobb issue.

[vasillalov]

Originally Posted by bryce

vaseline- your solution will be to get protuned with a shop that has access tuner. your wastegates, soleniods, or something else is causing your issue. it's not a cobb issue.

Keep your insults to yourself! I never said it was a Cobb issue! From what it looks like, this might be a bug in BMW's firmware.

Just look into the Cobb thread and you will see a lot of other people reporting this issue. And I guarantee you that there are others out there who are keeping quiet. The fact that Cobb even bothered releasing maps that attempt to fix boost oscillations should tell you something!

Beta maps for the BMW N54 AccessPORT are now available for download and evaluation. These v4.00 BETA maps were developed to provide smoother response, more power and address the 3k RPM "surge" that some users have been experiencing.

[bryce]

^i still would argue that it's a hardware issue, as MOST cobb users don't have that issue. wastegate stiffness or some other factor (that can't be address properly in a mass off-the-shelf tune that fits everyone) is causing it. just to prove that it's not a cobb issue, here's a textbook log (with the exception of a wheel spin dip) that i recorded on the older cobb v.301 maps:

[bryce]

here's another log with a few timing drops. i think the timing drops were a result of the tune not being fully adapted, as i had just reflased to stage2+ stock throttle on the way to work.

[bryce]

no surge or oscillations whatsoever, on maps that some people had issues with (v.301)

[vasillalov]

What is your BMW firmware version? What is your ECU ID? Do you have MSD80 or MSD81? How many miles on your car? All this can play into how the engine performs.

I have 27K on my 2008 model with MSD80. ECU Id is I8A0S. No waste gate rattle, no vacuum problems. Perhaps this is isolated to a specific BMW firmware and ECU version.

[bryce]

my main point is this- off-the-shelf maps are designed to fit a wide range of users at different altitudes, temperatures, humidity, octane, etc. it can't fit everyone's specific needs as there are hardware variances. if i was having issues like you are, i would get a custom tune from ProEFI that should eliminate any surges, oscillations, or whatever else you're having. don't expect cobb to fix a hardware issue

[vasillalov]

Originally Posted by bryce

no surge or oscillations whatsoever, on maps that some people had issues with (v.301)

I am glad it works great for you!

[bryce]

Originally Posted by vasillalov

What is your BMW firmware version? What is your ECU ID? Do you have MSD80 or MSD81? How many miles on your car? All this can play into how the engine performs.

I have 27K on my 2008 model with MSD80. ECU Id is I8A0S. No waste gate rattle, no vacuum problems. Perhaps this is isolated to a specific BMW firmware and ECU version.

i have the same ecu id (I8A0S), 2007 with 50k miles, msd80. i know i have the most up-to-date bmw software originally on the ecu. it's not software or ecu related. IT'S HARDWARE RELATED. my money's on wastegate stiffness