Take-off lag

Nishan · 01-20-2011, 08:51 AM

Hi,

I have a 135i DCT and I noticed that even when the car is in sport mode and I floor the accelerator, there is a slight lag before the car takes-off. Is the common?

I have not tried the launch control yet....waiting for mileage

oman135 · 01-20-2011, 08:52 AM

there is a little lag !
did u disable the traction control

Nishan · 01-20-2011, 08:55 AM

No, does that eliminate the lag?

bogart · 01-20-2011, 09:46 AM

Quote:

Originally Posted by Nish 135i M DCT

Hi,

I have a 135i DCT and I noticed that even when the car is in sport mode and I floor the accelerator, there is a slight lag before the car takes-off. Is the common?

I have not tried the launch control yet....waiting for mileage

I feel your DCT pain... although I have learned to overcome it. Please read through the following post:

http://www.1addicts.com/forums/showt...=477547&page=2

SlicktopTTZ · 01-20-2011, 11:54 AM

Quote:

Originally Posted by bogart

:

Bogart, best avatar of the year so far.

DWRAT · 01-21-2011, 12:10 AM

I had the exact same concern from a dead stop when mine was new.
Let me tell you once you get to about 1,500 miles all the lag goes away.
In fact now from a dead stop I can't floor it or the tires start burning.
Here was my compliant post: http://www.1addicts.com/forums/showthread.php?t=415653
and after break in
Read here: http://www.1addicts.com/forums/showthread.php?t=450504

HondaGoneRogue · 01-21-2011, 12:23 AM

Have you guys had a ride in a 1er with a JB3/4? I think you will love what you feel.
Besides the power, BMS does wonders with the throttle smoothing and lag fix's. I think N55's feel even better with the tune, from what I've read.

GO135i007 · 01-21-2011, 07:18 AM

Quote:

Originally Posted by HondaGoneRogue

Have you guys had a ride in a 1er with a JB3/4? I think you will love what you feel.
Besides the power, BMS does wonders with the throttle smoothing and lag fix's. I think N55's feel even better with the tune, from what I've read.

I love my JB3

NYC6 · 01-21-2011, 11:52 AM

Quote:

Originally Posted by SlicktopTTZ

Bogart, best avatar of the year so far.

imported_mega · 01-21-2011, 01:45 PM

Quote:

Originally Posted by HondaGoneRogue

Have you guys had a ride in a 1er with a JB3/4? I think you will love what you feel.
Besides the power, BMS does wonders with the throttle smoothing and lag fix's. I think N55's feel even better with the tune, from what I've read.

I do not think either tune does anything to the DCT

onefastman · 01-21-2011, 01:46 PM

Yes it does

imported_mega · 01-21-2011, 01:55 PM

Quote:

Originally Posted by onefastman

Yes it does

really? What does it do to the transmission ?

HondaGoneRogue · 01-21-2011, 02:17 PM

I don't think the DTC is the source of the lag in question. But either way, I am pretty sure they can remap the throttle to overcome any lag if it is indeed because of the DTC software.

HondaGoneRogue · 01-21-2011, 02:20 PM

Quote:

Originally Posted by imported_mega

really? What does it do to the transmission ?

What does the transmission do regarding the lag? I think we need to specify if its THROTTLE lag or TURBO lag they are feeling.

imported_mega · 01-21-2011, 02:24 PM

I thought they were talking about transmission lag

HondaGoneRogue · 01-21-2011, 03:13 PM

After re-reading the first post, I agree. Thanks for the correction. However, the tune can still manipulate the throttle, just like the Blitz, and the one that WSTO sells (Pivot?). Maybe those are a better solution?

Diver · 01-21-2011, 03:17 PM

Its possible to hit a flat spot in traffic when driving slowly in D2 and then giving a lot of throttle at once. The real cure is to use the M mode as mentioned above.

gmartan · 01-27-2011, 09:20 PM

Quote:

Originally Posted by HondaGoneRogue

I don't think the DTC is the source of the lag in question. But either way, I am pretty sure they can remap the throttle to overcome any lag if it is indeed because of the DTC software.

This is the one issue that I find most annoying, other than the RFTs (now removed), because I can't get BMW to take this seriously. It ain't the DTC or the dual clutch transmission as some (including BMW) claim. If it was the transmission the tach would show the engine responding to the the gas pedal pressure immediately. It does not. The gas just doesn't come on immediately as it should. That's the lag. It is well documented amongst various BMW models but varies from model to model and from year to year. Sport mode helps a little but not consistently.

Aside from never knowing if the power will come on in time to pull into moving traffic from a stop, it is also annoying to take your foot off the gas coming into a corner then attempt to power out of that corner as normal only to coast through the corner before the power kicks in. No fun there. Dinan (and others) will sell a fix for this but we shouldn't have to get it done that way.

Raine · 01-27-2011, 09:50 PM

Uh, I'm not sure what the 135i version of the BMS Powerbox is (probably JB?), but it certainly fixed my throttle lag.

01-20-2011, 08:51 AM	#1
Nishan Private First Class 32 Rep 177 Posts Drives: BMW 1M Join Date: Jan 2011 Location: South africa iTrader: (0) Garage List 2012 BMW 1M [0.00]	Take-off lag Hi, I have a 135i DCT and I noticed that even when the car is in sport mode and I floor the accelerator, there is a slight lag before the car takes-off. Is the common? I have not tried the launch control yet....waiting for mileage
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01-20-2011, 08:52 AM	#2
oman135 Major 69 Rep 1,041 Posts Drives: F80 M3 Join Date: Aug 2010 Location: Oman-Muscat iTrader: (0)	there is a little lag ! did u disable the traction control __________________ 2016 YMB F80 M3
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01-20-2011, 08:55 AM	#3
Nishan Private First Class 32 Rep 177 Posts Drives: BMW 1M Join Date: Jan 2011 Location: South africa iTrader: (0) Garage List 2012 BMW 1M [0.00]	No, does that eliminate the lag?
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01-21-2011, 12:10 AM	#6
DWRAT Private 2 Rep 55 Posts Drives: 135i Join Date: Jul 2010 Location: Phoenix, AZ iTrader: (0)	I had the exact same concern from a dead stop when mine was new. Let me tell you once you get to about 1,500 miles all the lag goes away. In fact now from a dead stop I can't floor it or the tires start burning. Here was my compliant post: http://www.1addicts.com/forums/showthread.php?t=415653 and after break in Read here: http://www.1addicts.com/forums/showthread.php?t=450504 __________________ 2011 135i DCT Last edited by DWRAT; 01-21-2011 at 12:16 AM..
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01-21-2011, 12:23 AM	#7
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	Have you guys had a ride in a 1er with a JB3/4? I think you will love what you feel. Besides the power, BMS does wonders with the throttle smoothing and lag fix's. I think N55's feel even better with the tune, from what I've read. __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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01-21-2011, 01:46 PM	#11
onefastman Major General 159 Rep 5,689 Posts Drives: 2009 135i 2011 e92m dct Join Date: Sep 2009 Location: Earth iTrader: (15)	Yes it does __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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01-21-2011, 02:17 PM	#13
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	I don't think the DTC is the source of the lag in question. But either way, I am pretty sure they can remap the throttle to overcome any lag if it is indeed because of the DTC software. __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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01-21-2011, 02:24 PM	#15
imported_mega Colonel 122 Rep 2,199 Posts Drives: various bmw's Join Date: Jul 2007 Location: neverland iTrader: (0)	I thought they were talking about transmission lag __________________ You only need two tools in life - WD-40 and Duct Tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape. Driving e82, e72, e85, R53 Gone but not forgotten.. 1974 2002, many various 3s.
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01-21-2011, 03:13 PM	#16
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	After re-reading the first post, I agree. Thanks for the correction. However, the tune can still manipulate the throttle, just like the Blitz, and the one that WSTO sells (Pivot?). Maybe those are a better solution? __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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01-21-2011, 03:17 PM	#17
Diver Brigadier General 504 Rep 3,446 Posts Drives: Black '12 135i - Sold Join Date: Nov 2010 Location: Texas iTrader: (0)	Its possible to hit a flat spot in traffic when driving slowly in D2 and then giving a lot of throttle at once. The real cure is to use the M mode as mentioned above. __________________ See my photography at http://ronscubadiver.wordpress.com
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01-27-2011, 09:50 PM	#19
Raine Captain 44 Rep 841 Posts Drives: '11 E82, '04 E60 Join Date: Jun 2010 Location: Toronto iTrader: (3)	Uh, I'm not sure what the 135i version of the BMS Powerbox is (probably JB?), but it certainly fixed my throttle lag.
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