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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > **infamous n55 torque dip**



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      02-01-2011, 02:30 PM   #45
shockin330i
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Originally Posted by dmboone25 View Post
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
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      02-01-2011, 02:44 PM   #46
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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?
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      02-01-2011, 02:44 PM   #47
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Quote:
Originally Posted by dmboone25 View Post
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
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      02-01-2011, 02:54 PM   #48
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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
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      02-01-2011, 03:06 PM   #49
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Quote:
Originally Posted by dmboone25 View Post
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...
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      02-01-2011, 07:24 PM   #50
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here's my answer to this :http://www.e90post.com/forums/showth...62#post8819162
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      02-01-2011, 09:55 PM   #51
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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, 10:19 PM   #52
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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
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      02-01-2011, 10:22 PM   #53
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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, 10:41 AM   #54
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This is BMW's way to keep us from adding more HP.
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      02-02-2011, 01:09 PM   #55
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my 135 dct with tune - started jerking or feels like knocking under load any reason why ??
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      02-02-2011, 01:21 PM   #56
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my 135 dct with tune - started jerking or feels like knocking under load any reason why ??
Is it cold?
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      02-02-2011, 01:56 PM   #57
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Is it cold?
no ..
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      02-02-2011, 02:24 PM   #58
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Whic tune?
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      02-02-2011, 02:34 PM   #59
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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?
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      02-02-2011, 02:36 PM   #60
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What mods are done to this car. Is it a N55 or N54?

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