**infamous n55 torque dip**

shockin330i · 02-01-2011, 01:30 PM

Quote:

Originally Posted by dmboone25

Shiv--why do you think this is for the DCT?

If that is an obvious question/answer I apologize.

Coming from my 2008 N54/MT 135 to the 2011 N55/DCT 135, I swear the new one feels faster stock...I think it may just be the way that the transmission shifts...

The clutch is slipping on the dct

dmboone25 · 02-01-2011, 01:44 PM

Quote:

Originally Posted by shockin330i

The clutch is slipping on the dct

Weird...I haven't experienced that on my stock car...but then again I wouldn't think that would happen on a stock car...

Aren't there 2 clutches in the DCT? One for even gears, one for odd?

shockin330i · 02-01-2011, 01:44 PM

Quote:

Originally Posted by dmboone25

Weird...I haven't experienced that on my stock car...but then again I wouldn't think that would happen on a stock car...

Aren't there 2 clutches in the DCT? One for even gears, one for odd?

I do believe this is the way it works. At least thats how it works for th vdubs

dmboone25 · 02-01-2011, 01:54 PM

Quote:

Originally Posted by shockin330i

I do believe this is the way it works. At least thats how it works for th vdubs

That's what I thought as well...I wonder if it is only one of the clutches or both...I suppose if the slippage was always in even or odd gears, that could tell you...not sure if that would be useful to the solution or not

shockin330i · 02-01-2011, 02:06 PM

Quote:

Originally Posted by dmboone25

That's what I thought as well...I wonder if it is only one of the clutches or both...I suppose if the slippage was always in even or odd gears, that could tell you...not sure if that would be useful to the solution or not

I guess we'll have to wait for shiv to respond to that...

black e · 02-01-2011, 06:24 PM

here's my answer to this :http://www.e90post.com/forums/showth...62#post8819162

Swadeness · 02-01-2011, 08:55 PM

OK after reading all that I have a couple of questions.

Do you guys believe this is just an anomaly that shows up on the dyno and not something we would see on the street? And are there any data logs from street runs that would support that answer either way?

This appears to not be related to any specific transmission correct?

What is the PROcede doing differently to cure this anomaly?

Am I the only who is frustrated with the fact that all these dyno graphs have different scales, smoothing, and aspect ratios? A slight change in scale or aspect ratio (stretching horizontal or vertical) can have a big impact on the way the graph looks to the eye. It makes fairly comparing two graphs side by side difficult.

Very interesting discussion guys, I love looking through and comparing these data logs! Keep it up.

shockin330i · 02-01-2011, 09:19 PM

Quote:

Originally Posted by Swadeness

OK after reading all that I have a couple of questions.

Do you guys believe this is just an anomaly that shows up on the dyno and not something we would see on the street? And are there any data logs from street runs that would support that answer either way?

This appears to not be related to any specific transmission correct?

What is the PROcede doing differently to cure this anomaly?

Am I the only who is frustrated with the fact that all these dyno graphs have different scales, smoothing, and aspect ratios? A slight change in scale or aspect ratio (stretching horizontal or vertical) can have a big impact on the way the graph looks to the eye. It makes fairly comparing two graphs side by side difficult.

Very interesting discussion guys, I love looking through and comparing these data logs! Keep it up.

Just send me dyno files and I can overlap them. Granted weather and other things won't be consistant

black e · 02-01-2011, 09:22 PM

The car doesn't do "the dip" on the street... And I actually changed my dynos in my thread to be more inline with what people use around here, STD correction and smoothing of 5.
I don't have a street log of 4-5th gear, from 2k to 6500 RPM because that also means 120+mph....but I'll make some logs in 3rd to show this.

dmboone25 · 02-02-2011, 09:41 AM

This is BMW's way to keep us from adding more HP.

babyboss · 02-02-2011, 12:09 PM

my 135 dct with tune - started jerking or feels like knocking under load any reason why ??

shockin330i · 02-02-2011, 12:21 PM

Quote:

Originally Posted by babyboss

my 135 dct with tune - started jerking or feels like knocking under load any reason why ??

Is it cold?

babyboss · 02-02-2011, 12:56 PM

Quote:

Originally Posted by shockin330i

Is it cold?

no ..

shockin330i · 02-02-2011, 01:24 PM

Whic tune?

GiRtHyN55 · 02-02-2011, 01:34 PM

Quote:

Originally Posted by shockin330i

Can I get some mother f'in torque on pump gas!!!!
procede new maps....

What mods are done to this car. Is it a N55 or N54?

jpsimon · 02-02-2011, 01:36 PM

Quote:

Originally Posted by GiRtHyN55

What mods are done to this car. Is it a N55 or N54?

http://www.e90post.com/forums/showthread.php?t=483266

02-01-2011, 06:24 PM	#50
black e Lieutenant 34 Rep 522 Posts Drives: DCT N55 135I Join Date: May 2010 Location: Boca Raton iTrader: (7)	here's my answer to this :http://www.e90post.com/forums/showth...62#post8819162
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02-01-2011, 08:55 PM	#51
Swadeness Captain 75 Rep 642 Posts Drives: 2011 135i Join Date: Aug 2008 Location: enroute iTrader: (0) Garage List 2011 135i [0.00]	OK after reading all that I have a couple of questions. Do you guys believe this is just an anomaly that shows up on the dyno and not something we would see on the street? And are there any data logs from street runs that would support that answer either way? This appears to not be related to any specific transmission correct? What is the PROcede doing differently to cure this anomaly? Am I the only who is frustrated with the fact that all these dyno graphs have different scales, smoothing, and aspect ratios? A slight change in scale or aspect ratio (stretching horizontal or vertical) can have a big impact on the way the graph looks to the eye. It makes fairly comparing two graphs side by side difficult. Very interesting discussion guys, I love looking through and comparing these data logs! Keep it up. __________________
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02-01-2011, 09:22 PM	#53
black e Lieutenant 34 Rep 522 Posts Drives: DCT N55 135I Join Date: May 2010 Location: Boca Raton iTrader: (7)	The car doesn't do "the dip" on the street... And I actually changed my dynos in my thread to be more inline with what people use around here, STD correction and smoothing of 5. I don't have a street log of 4-5th gear, from 2k to 6500 RPM because that also means 120+mph....but I'll make some logs in 3rd to show this.
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02-02-2011, 09:41 AM	#54
dmboone25 Lieutenant General 4972 Rep 10,200 Posts Drives: 2024 Golf R / 2022 718 Spyder Join Date: Sep 2006 Location: Dallas, TX iTrader: (0) Garage List 2007 E92 328i [10.00] 2007 328i [10.00]	This is BMW's way to keep us from adding more HP. __________________ Past rides: 2016 981 BGTS, 2020 MINI JCW, 2017 F80, 2015 981 CS, 2014 F22 235, 2011 E82 135, 2008 E82 135, 2007 E92 328, 2007 E92 328 (My lady drives an OG M2. So does my dad)
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02-02-2011, 12:09 PM	#55
babyboss Lieutenant 74 Rep 554 Posts Drives: 640d Msport Join Date: Jun 2010 Location: centurion iTrader: (0) Garage List 2012 640d [0.00]	my 135 dct with tune - started jerking or feels like knocking under load any reason why ??
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02-02-2011, 01:24 PM	#58
shockin330i Brigadier General 798 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	Whic tune? __________________ ERnie 2016 BSM/f80/ZCP
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