lag on shift

hijack · 06-19-2011, 07:50 AM

hi all,
tried search but it didn't bring any positive results.

i have 2007 335 6mt, jb4 installed.
when I'm running on stock or 5 map (doesn't matter) and shift from 1to2, or any other gears, I'm having lag. is there any fix for this issue because it really annoys me, I like when rear wheels are getting drifted on shifting with full throttle.

Big Tom · 06-19-2011, 08:02 AM

Quote:

Originally Posted by hijack

hi all,
tried search but it didn't bring any positive results.

i have 2007 335 6mt, jb4 installed.
when I'm running on stock or 5 map (doesn't matter) and shift from 1to2, or any other gears, I'm having lag. is there any fix for this issue because it really annoys me, I like when rear wheels are getting drifted on shifting with full throttle.

Seems to be a common JB4 related problem: http://www.n54tech.com/forums/showthread.php?t=12757

...and I manage to get rid of it when I changed to PROcede.

Mr. Nice · 06-19-2011, 08:31 AM

I have shift bog with Cobb as well, only solution I have found is not shifting as fast.

hijack · 06-19-2011, 08:54 AM

Quote:

Originally Posted by Mr. Nice

I have shift bog with Cobb as well, only solution I have found is not shifting as fast.

why do i need fast car then?

s2k_335i · 06-19-2011, 09:35 AM

Try to shift slower or change to Procede or Cobb....

Big Tom · 06-19-2011, 09:39 AM

Quote:

Originally Posted by s2k_335i

Try to shift slower or change to Procede or Cobb....

--->

Quote:

Originally Posted by Mr. Nice

I have shift bog with Cobb as well, only solution I have found is not shifting as fast.

quattrosaint · 06-19-2011, 10:20 AM

I thought this was because of the CDV?

themyst · 06-19-2011, 12:21 PM

To be fair, I bogged on both a JB3 and Procede. It's one of those things you can't do much about at this time until ATR comes out.

ian2002525 · 06-19-2011, 12:23 PM

Quote:

Originally Posted by themyst

To be fair, I bogged on both a JB3 and Procede. It's one of those things you can't do much about at this time until ATR comes out.

what is ATR?

Tzu · 06-19-2011, 01:04 PM

Access Tuner Race, fine tuning software for Cobb.

Mr. Nice · 06-19-2011, 01:51 PM

Quote:

Originally Posted by quattrosaint

I thought this was because of the CDV?

I deleted mine so you can rule that out.

gsmurf · 06-19-2011, 03:17 PM

Mine is the opposite, I use to have that lag on stock shifting from 1 to 2.
Now with the JB4 and the new FW that is gone. Same config as you with CDV delete.

Panoz · 06-19-2011, 03:57 PM

Guys...have you ever thought that this issue is not tune-related ?

I'm under the impression that this is a clutch issue. I personaly noticed that this is only happens when the clutch is overheated (due to traffic or intensive driving). I also experience minor clutch slipping. All the 6MT i know , has the same issue

tibra1 · 06-19-2011, 04:05 PM

GIAC no lags here..i have the modified CDV..and it helped alot with the 1-2 shift jerkiness on stock CDV...this does nothing for the lag the OP describes.

hijack · 06-20-2011, 12:42 AM

okay, will install cdv next week and tell you results )

Brey335i · 06-20-2011, 01:03 AM

All 335i manuals bog a little. Take it from someone who has driven a lot of good manuals. you can definitely improve it but you won't ever get it perfect. At least IMO

Joshboody · 06-20-2011, 01:52 AM

the bog, most often, is timing retard. it happens stock also when the weather is hot, especially with 91oct. You have to dial down boost to reduce it.

turb0mik3 · 06-20-2011, 03:15 AM

I don't know how hard you are shifting, but getting a perfect 1-2 shift is extremely hard and even more difficult when you are putting down more power. I have never experienced this "bog," but your description is slightly ambiguous. Do you feel a lag in the clutch engagement or releasing of the clutch or the differential? There are soooo many variables. Care to elaborate?

E90SoFlo · 06-20-2011, 06:33 AM

You guys saying you have to switch to PROceed is incorrect.

I was in a 08' 335 with a V5 last sat. night and it bogged once too..

Quote:

Originally Posted by Mflowt5

I don't know how hard you are shifting, but getting a perfect 1-2 shift is extremely hard and even more difficult when you are putting down more power. I have never experienced this "bog," but your description is slightly ambiguous. Do you feel a lag in the clutch engagement or releasing of the clutch or the differential? There are soooo many variables. Care to elaborate?

It feels like you missed a gear.

themyst · 06-20-2011, 06:38 AM

To be fair, both the JB3 and Procede bogged on my car on high boost. It just wasn't as bad on the Procede.

Both didn't bog at boost levels up to 15-16 psi and was worst on the 2-3 and 3-4 shifts.

hijack · 06-20-2011, 07:31 AM

I can feel how turbo is going on boost after shifting - i call it lag.

achien · 06-20-2011, 08:22 AM

Try Dinan. just had it installed last week and the shift (especially 1-2) had improved (no CDV delete).

I believe it's the way they changed the ECU throttle mapping. Besides removing the "drive-by-wire" throttle lag, they also continue to give the engine a little more gas when you life-off the throttle, this is very subtle but it actually prevents the fly-wheel from slowing too much until you get it into the next gear.

The drivability of Dinan is better than BMW stock and I believe the amount of testing and re-calibration is what makes them more expensive than other tuners.

Quote:

Originally Posted by hijack

hi all,
tried search but it didn't bring any positive results.

i have 2007 335 6mt, jb4 installed.
when I'm running on stock or 5 map (doesn't matter) and shift from 1to2, or any other gears, I'm having lag. is there any fix for this issue because it really annoys me, I like when rear wheels are getting drifted on shifting with full throttle.

06-19-2011, 07:50 AM	#1
hijack New Member 3 Rep 25 Posts Drives: g35 Join Date: Dec 2010 Location: belarus iTrader: (0)	lag on shift - 6mt hi all, tried search but it didn't bring any positive results. i have 2007 335 6mt, jb4 installed. when I'm running on stock or 5 map (doesn't matter) and shift from 1to2, or any other gears, I'm having lag. is there any fix for this issue because it really annoys me, I like when rear wheels are getting drifted on shifting with full throttle.
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06-19-2011, 09:35 AM	#5
s2k_335i This is it!! 15 Rep 672 Posts Drives: FBO 335i without meth Join Date: Jul 2010 Location: Land of Freedom iTrader: (1)	Try to shift slower or change to Procede or Cobb.... __________________ DFW, TX. Current: 08' Cayenne GTS, 14' Boxster S, 12' CBR 1000', 04' Bayliner 2556 Sold: 2010 A4, 2008 335i, 2007 335i, 2006 M3, 2006 S2000, 1990 NSX, 1991 300zx, 1992 Supra, 1996 Prelude, 1981 CRX, 1980 Mustang.
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06-19-2011, 10:20 AM	#7
quattrosaint Lieutenant 28 Rep 553 Posts Drives: Fast Join Date: Mar 2010 Location: Dallas iTrader: (5)	I thought this was because of the CDV? __________________ [SIZE="2"]335 E92 Space Gray/Coral/Aluminum/6MT
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06-19-2011, 12:21 PM	#8
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	To be fair, I bogged on both a JB3 and Procede. It's one of those things you can't do much about at this time until ATR comes out. __________________ E90 LCI N54 6AT
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06-19-2011, 01:04 PM	#10
Tzu Lieutenant Colonel 29 Rep 1,551 Posts Drives: 335i Join Date: Jun 2010 Location: Toronto iTrader: (1)	Access Tuner Race, fine tuning software for Cobb.
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06-19-2011, 03:17 PM	#12
gsmurf First Lieutenant 9 Rep 332 Posts Drives: F30 340i Xdrive Join Date: Mar 2007 Location: Seattle iTrader: (9) Garage List 2011 328i Xdrive [0.00]	Mine is the opposite, I use to have that lag on stock shifting from 1 to 2. Now with the JB4 and the new FW that is gone. Same config as you with CDV delete. Last edited by gsmurf; 06-19-2011 at 03:26 PM..
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06-19-2011, 03:57 PM	#13
Panoz Lieutenant Colonel 84 Rep 1,575 Posts Drives: E92 Space Grey 335i ,Aero Kit Join Date: Nov 2006 Location: EU iTrader: (0)	Guys...have you ever thought that this issue is not tune-related ? I'm under the impression that this is a clutch issue. I personaly noticed that this is only happens when the clutch is overheated (due to traffic or intensive driving). I also experience minor clutch slipping. All the 6MT i know , has the same issue __________________ Procede V4 , Catless DPs, Forge FMIC, Injen Intake, VK Oilcooler, Hartge Quads Exhaust, Modded CDV, Synapse BOV Kit, BMW Performance 335i SSK Kit, P3 vent boost gauge Space Grey 335i -> See more pics HERE
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06-19-2011, 04:05 PM	#14
tibra1 Banned 127 Rep 6,773 Posts Drives: 2011 ZCP M3 - 2007 335i crashd Join Date: Apr 2009 Location: NYC iTrader: (4)	GIAC no lags here..i have the modified CDV..and it helped alot with the 1-2 shift jerkiness on stock CDV...this does nothing for the lag the OP describes.
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06-20-2011, 12:42 AM	#15
hijack New Member 3 Rep 25 Posts Drives: g35 Join Date: Dec 2010 Location: belarus iTrader: (0)	okay, will install cdv next week and tell you results )
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06-20-2011, 01:03 AM	#16
Brey335i Banned 112 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	All 335i manuals bog a little. Take it from someone who has driven a lot of good manuals. you can definitely improve it but you won't ever get it perfect. At least IMO
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06-20-2011, 01:52 AM	#17
Joshboody Lieutenant Colonel 65 Rep 1,708 Posts Drives: pickemuptruck Join Date: Jul 2009 Location: Phoenix, AZ iTrader: (7)	the bog, most often, is timing retard. it happens stock also when the weather is hot, especially with 91oct. You have to dial down boost to reduce it.
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06-20-2011, 03:15 AM	#18
turb0mik3 242 Rep 2,781 Posts Drives: E90 335i Racecar Join Date: Jan 2010 Location: San Diego, CA iTrader: (1) Garage List 2010 BMW 335i [8.90]	I don't know how hard you are shifting, but getting a perfect 1-2 shift is extremely hard and even more difficult when you are putting down more power. I have never experienced this "bog," but your description is slightly ambiguous. Do you feel a lag in the clutch engagement or releasing of the clutch or the differential? There are soooo many variables. Care to elaborate? __________________ HG Motorsports \| Motiv Motorsport \| Sparta Evolution \| BBS Motorsports \| Sabelt \| JRZ \| NASA ST1 SoCal --- 554whp/487wtrq --- 3200lbs <<YouTube Channel w/ Race Videos>>
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06-20-2011, 06:38 AM	#20
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	To be fair, both the JB3 and Procede bogged on my car on high boost. It just wasn't as bad on the Procede. Both didn't bog at boost levels up to 15-16 psi and was worst on the 2-3 and 3-4 shifts. __________________ E90 LCI N54 6AT
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06-20-2011, 07:31 AM	#21
hijack New Member 3 Rep 25 Posts Drives: g35 Join Date: Dec 2010 Location: belarus iTrader: (0)	I can feel how turbo is going on boost after shifting - i call it lag.
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