Quick question: Delay in power shifting at redline?

STooK · 01-25-2021, 09:42 AM

Hey guys,

Is it normal for there to be a delay in power when shifting at redline? 6MT here and yesterday I was merging on the highway and redlined 1-2 shift. After shifting into second I went back on the throttle and there was about a half second delay before the car started accelerating again.

I thought maybe it could be a Clutch delay valve but I did a quick search and someone said there's no CDV on these cars. Am I just trying to shift too fast or is this normal behavior? This only seems to happen when I'm giving 100% throttle and shifting at redline. Thanks.

akkando · 01-25-2021, 11:39 AM

Don't have MT but could be traction control stepping in?

STooK · 01-25-2021, 12:32 PM

Quote:

Originally Posted by akkando

Don't have MT but could be traction control stepping in?

Interesting, I didn't even think of that. I never drive with DSC OFF so that's very possible. Does the traction control light flash when it's intervening? I don't remember anything flashing.

DRLane · 01-25-2021, 12:48 PM

Quote:

Originally Posted by STooK

Quote:

Originally Posted by akkando

Don't have MT but could be traction control stepping in?

Interesting, I didn't even think of that. I never drive with DSC OFF so that's very possible. Does the traction control light flash when it's intervening? I don't remember anything flashing.

Sounds like TC engagement, although I rarely take first to red line or launch the car. I'm more into 2nd and 3rd. Try it with MDM.

Jerezblack.m3 · 01-25-2021, 12:58 PM

This happens to me too. No lights showing and seems like theres a power cut but the engine keeps going. I have a DCT. Could be the TC or sparkplugs/injector needs to be changed. Dont know. I wanna know the issue too

DRLane · 01-25-2021, 01:00 PM

Quote:

Originally Posted by Jerezblack.m3

This happens to me too. No lights showing and seems like theres a power cut but the engine keeps going. I have a DCT. Could be the TC or sparkplugs/injector needs to be changed. Dont know. I wanna know the issue too

Turn off TC and you'll know immediately. If TC is on it'll cut the power anytime the traction hints of slip.

kyrix1st · 01-25-2021, 01:30 PM

Traction control is toxic on these cars, gives false sense of grip while not really saving you when in a pinch.

I would permanently turn it off.

Eja144 · 01-25-2021, 02:12 PM

Definitely sounds like traction control. Even in MDM mode my car will cut power on high RPM 1-2 shifts. As long as the road is dry, I usually drive with DSC off once the car is warmed up.

pbonsalb · 01-25-2021, 04:13 PM

Euro MDM is much less invasive and worth the coding and if needed new/used steering wheel switch gear with szl module. I rarely turn mine off; the stock MDM intervened way too much. Euro MDM will let you leave a little rubber or slide a little. More is fun, but slower.

GotV8? · 01-25-2021, 05:46 PM

OP, mine is a 6MT as well, try to see if you can duplicate it with your TC "turn on" and see if it still exist. Then repeat it with your TC "turn off". It happened to me before when I try doing that with "TC ON" during my first year of ownership on early morning roads with moist surface. Gluck

amrazM · 01-26-2021, 05:29 AM

Quote:

Originally Posted by Jerezblack.m3

This happens to me too. No lights showing and seems like theres a power cut but the engine keeps going. I have a DCT. Could be the TC or sparkplugs/injector needs to be changed. Dont know. I wanna know the issue too

no, just no

STooK · 01-26-2021, 11:43 AM

Thank you guys for the response. I will try with TC off someday but right now I don't feel comfortable as I'm still on summers and it's cold here in NY. Just glad it's not something wrong with the car.

Silos · 04-30-2021, 01:12 PM

Quote:

Originally Posted by STooK

Thank you guys for the response. I will try with TC off someday but right now I don't feel comfortable as I'm still on summers and it's cold here in NY. Just glad it's not something wrong with the car.

came here after driving my car hard last night exhibiting the same issue, however, it seems to happen when at high RPM and if I let off the throttle and back again at WOT. Almost like the clutch is slipping, but it isn't.

Hoping you found what your issue was. I will also need to test with traction control off.

STooK · 05-19-2021, 09:29 PM

Quote:

Originally Posted by Silos

came here after driving my car hard last night exhibiting the same issue, however, it seems to happen when at high RPM and if I let off the throttle and back again at WOT. Almost like the clutch is slipping, but it isn't.

Hoping you found what your issue was. I will also need to test with traction control off.

I haven't really had the issue again now that the weather is warmer but I also take my time between shifts now and no longer get that "delay". I just take a split second longer between the shifts (be more gentle with it than almost power shifting it) and it feels much smoother.

Ajolives · 05-20-2021, 06:55 AM

Definitely TCS getting in the way, power shifting 1-2 gets the backend excitable, but controllable. I've had TCS on before trying to drive like an a-hole and it cuts power.

G60nut · 05-20-2021, 11:41 AM

Quote:

Definitely TCS getting in the way, power shifting 1-2 gets the backend excitable, but controllable. I've had TCS on before trying to drive like an a-hole and it cuts power.

I'll second this. Also note if the slip is minor or for a short duration the TCS does its job but the light doesn't come on.

neilum · 05-20-2021, 12:08 PM

Euro MDM is a game changer! Truly.

I never drive without MDM mode on, its just night/day difference.

Arctic Drifter · 05-24-2021, 04:29 PM

Since my 6MT is a Euro-version I've never experienced this, atleast not in connection to a gear shift. Of course the TC engages sometimes but when in MDM-mode you don't get that feeling of loosing power, just traction.

Silos · 05-25-2021, 10:51 AM

I don't mean to thread-jack, but mine almost seems like the clutch is slipping, but I don't think it actually is. With gear engaged (usually only in 3rd or 4th gear), and at high RPM's (~5k) if I let off the throttle and then WOT, I get slight delay in power, followed by a slight "thump" on the drivetrain and then the car jolts forward. No clutch smell. Doesn't do it any other time, even going from low RPM to redline. TC disabled.

It's almost like the driveshaft has a lot of play, or the clutches in the diff are slipping(?). I do have the "clink" sound coming from the DS when reversing or in 1st gear, so maybe it's that(?)

nrubenstein · 05-25-2021, 12:21 PM

Quote:

Originally Posted by Silos

I don't mean to thread-jack, but mine almost seems like the clutch is slipping, but I don't think it actually is. With gear engaged (usually only in 3rd or 4th gear), and at high RPM's (~5k) if I let off the throttle and then WOT, I get slight delay in power, followed by a slight "thump" on the drivetrain and then the car jolts forward. No clutch smell. Doesn't do it any other time, even going from low RPM to redline. TC disabled.

It's almost like the driveshaft has a lot of play, or the clutches in the diff are slipping(?). I do have the "clink" sound coming from the DS when reversing or in 1st gear, so maybe it's that(?)

This is normal behavior. It's driveline lash. Don't do it. You might have extra play due to wear, but even 100% new, these cars have lash.

Peertwelve · 05-25-2021, 12:58 PM

Could it be the clutch delay valve?

nrubenstein · 05-25-2021, 01:00 PM

Quote:

Originally Posted by Peertwelve

Could it be the clutch delay valve?

1) Even if there was one, no, not what he described.
2) I don't believe that the M3 gets one.

01-25-2021, 09:42 AM	#1
STooK Lieutenant Colonel 726 Rep 1,974 Posts Drives: 2013 E92 M3 ZCP Join Date: Sep 2011 Location: NY iTrader: (6)	Quick question: Delay in power shifting at redline? Hey guys, Is it normal for there to be a delay in power when shifting at redline? 6MT here and yesterday I was merging on the highway and redlined 1-2 shift. After shifting into second I went back on the throttle and there was about a half second delay before the car started accelerating again. I thought maybe it could be a Clutch delay valve but I did a quick search and someone said there's no CDV on these cars. Am I just trying to shift too fast or is this normal behavior? This only seems to happen when I'm giving 100% throttle and shifting at redline. Thanks. __________________ 2013 BMW E92 ///M3 AW/BLK ZCP CF Roof 6 Speed - Perfection 2011 BMW E90 328i xDrive Space Grey/Black - Daily 2011 BMW E93 ///M3 MW/FR/BLK 6 Speed - Gone but not forgotten
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01-25-2021, 11:39 AM	#2
akkando Major General 5863 Rep 6,635 Posts Drives: 17 M2 DCT LBB,11 e90 M3 ZCP IB Join Date: Jan 2017 Location: Bay Area iTrader: (1)	Don't have MT but could be traction control stepping in?
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01-25-2021, 12:58 PM	#5
Jerezblack.m3 First Lieutenant 149 Rep 307 Posts Drives: BMW E92 M3 Join Date: Jul 2019 Location: San Francisco iTrader: (4)	This happens to me too. No lights showing and seems like theres a power cut but the engine keeps going. I have a DCT. Could be the TC or sparkplugs/injector needs to be changed. Dont know. I wanna know the issue too
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01-25-2021, 01:30 PM	#7
kyrix1st Colonel 2360 Rep 2,360 Posts Drives: G87 M2; E92M3 MT&DCT; M3 euro Join Date: Sep 2014 Location: nyc iTrader: (0) Garage List 2004 BMW Z4 [0.00]	Traction control is toxic on these cars, gives false sense of grip while not really saving you when in a pinch. I would permanently turn it off. __________________ Pass me if you can.
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01-25-2021, 02:12 PM	#8
Eja144 Second Lieutenant 303 Rep 298 Posts Drives: 2008 E90 M3 Join Date: Jun 2019 Location: Long Island, NY iTrader: (0)	Definitely sounds like traction control. Even in MDM mode my car will cut power on high RPM 1-2 shifts. As long as the road is dry, I usually drive with DSC off once the car is warmed up.
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01-25-2021, 04:13 PM	#9
pbonsalb Lieutenant General 5227 Rep 10,610 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	Euro MDM is much less invasive and worth the coding and if needed new/used steering wheel switch gear with szl module. I rarely turn mine off; the stock MDM intervened way too much. Euro MDM will let you leave a little rubber or slide a little. More is fun, but slower.
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01-25-2021, 05:46 PM	#10
GotV8? Captain 1051 Rep 836 Posts Drives: Jerez E92 M3 ZCP "12" Join Date: Mar 2017 Location: OHIO iTrader: (0) Garage List 1996 Honda Prelude ... [0.00] 2018 BMW F85 X5M [0.00] 2012 E92 M3 ZCP [0.00]	OP, mine is a 6MT as well, try to see if you can duplicate it with your TC "turn on" and see if it still exist. Then repeat it with your TC "turn off". It happened to me before when I try doing that with "TC ON" during my first year of ownership on early morning roads with moist surface. Gluck Last edited by GotV8?; 01-26-2021 at 12:31 PM..
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01-26-2021, 11:43 AM	#12
STooK Lieutenant Colonel 726 Rep 1,974 Posts Drives: 2013 E92 M3 ZCP Join Date: Sep 2011 Location: NY iTrader: (6)	Thank you guys for the response. I will try with TC off someday but right now I don't feel comfortable as I'm still on summers and it's cold here in NY. Just glad it's not something wrong with the car. __________________ 2013 BMW E92 ///M3 AW/BLK ZCP CF Roof 6 Speed - Perfection 2011 BMW E90 328i xDrive Space Grey/Black - Daily 2011 BMW E93 ///M3 MW/FR/BLK 6 Speed - Gone but not forgotten
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05-20-2021, 06:55 AM	#15
Ajolives Captain 922 Rep 933 Posts Drives: E90 M3 Join Date: Mar 2019 Location: Tampa iTrader: (0) Garage List 2019 Audi SQ5 [0.00] 2008 BMW M3 [0.00]	Definitely TCS getting in the way, power shifting 1-2 gets the backend excitable, but controllable. I've had TCS on before trying to drive like an a-hole and it cuts power.
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05-20-2021, 12:08 PM	#17
neilum Captain 897 Rep 753 Posts Drives: 718 GT4 Join Date: Oct 2012 Location: Bergen County NJ iTrader: (2)	Euro MDM is a game changer! Truly. I never drive without MDM mode on, its just night/day difference.
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05-24-2021, 04:29 PM	#18
Arctic Drifter Soffpotatis 7 Rep 29 Posts Drives: BMW M3 E92 6MT Join Date: Dec 2015 Location: Sweden iTrader: (0)	Since my 6MT is a Euro-version I've never experienced this, atleast not in connection to a gear shift. Of course the TC engages sometimes but when in MDM-mode you don't get that feeling of loosing power, just traction. __________________ Garage: M3 6MT (E92)
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05-25-2021, 10:51 AM	#19
Silos First Lieutenant 556 Rep 358 Posts Drives: M2 Comp Join Date: Sep 2018 Location: Thousand Oaks, CA iTrader: (2)	I don't mean to thread-jack, but mine almost seems like the clutch is slipping, but I don't think it actually is. With gear engaged (usually only in 3rd or 4th gear), and at high RPM's (~5k) if I let off the throttle and then WOT, I get slight delay in power, followed by a slight "thump" on the drivetrain and then the car jolts forward. No clutch smell. Doesn't do it any other time, even going from low RPM to redline. TC disabled. It's almost like the driveshaft has a lot of play, or the clutches in the diff are slipping(?). I do have the "clink" sound coming from the DS when reversing or in 1st gear, so maybe it's that(?)
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05-25-2021, 12:58 PM	#21
Peertwelve Captain 781 Rep 914 Posts Drives: Silverstone E92 M3 Join Date: Jun 2011 Location: Seattle iTrader: (2) Garage List 2008 BMW M3 [3.00]	Could it be the clutch delay valve? __________________ 2008 SSII E92 M3 \| LCI CIC, Apps, Tails\| MPE \| BBS Ch-R 1990 325i Sold- 2011 335i Sedan \| 6MT \| Wavetrac \| Eibach Pro \| CDV delete \| Cobb \| BSW Sudden death - 1970 BMW 2002
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