DCT slipping with lots of Torque? Nope! - Page 3 - BMW 3-Series (E90 E92) Forum

Kcyrusm · 02-07-2013, 02:49 PM

Great info guys, keep it comin!

Can't wait to hear back with updates on the mechatronic tuning and upgraded turbo setups.

BuraQ, I see you broke into the 11's!!!!! Congrats dude!!!!!!

Update: I'm at 11,000 miles now, still going strong on my DCT, no slipping. There is a slight delay in power delivery on WOT, but Jake@PTF had told me previously that it is a known thing with the Cobb tune and is probably saving my clutches. I think I remember him saying it can be removed, but I don't wanna risk the stress.

BuraQ · 02-07-2013, 04:31 PM

Quote:

Originally Posted by Kcyrusm

BuraQ, I see you broke into the 11's!!!!! Congrats dude!!!!!!

Yes sir......aiming for mid and consistent 11s, stay tuned

33k miles, 200+ launches, and the DCT is still working strong

romanonj · 02-07-2013, 10:11 PM

What a great thread! Having owned my IS a little over two months now, I am noticing that it is a lot happier in either full auto with sport on, or manual mode with or without sport mode. When you refer to dtc off and completely off, what do you mean? One press of a button it is off, I am not aware of any secondary deactivation.. I may be wrong.

Thanks!

mdyates · 02-08-2013, 08:37 AM

Good info!! How are you two launching your DCT? I see the two step technique out there, but would like to know what technique you're using to get great 60 ft's?

busta7777 · 02-13-2013, 05:01 AM

Im at 17k
411 with 457 tq pro tuned since 10k
Tuned since 2k on e40
Clutch doesnt spin with pro tune but
When i stacked jb4 +cobb it did

Im about to be installing rb turbos by begging of march let u guys know how it goes

I also only lauchned about 15 times since i had the car only WOT at around 2nd gear through 5th

_ink · 02-13-2013, 09:29 AM

Quote:

Originally Posted by romanonj

What a great thread! Having owned my IS a little over two months now, I am noticing that it is a lot happier in either full auto with sport on, or manual mode with or without sport mode. When you refer to dtc off and completely off, what do you mean? One press of a button it is off, I am not aware of any secondary deactivation.. I may be wrong.

Thanks!

One press is partially off, and the second option is press and hold for 5 seconds for completely off.

BuraQ · 02-13-2013, 09:50 AM

Quote:

Originally Posted by mdyates

Good info!! How are you two launching your DCT? I see the two step technique out there, but would like to know what technique you're using to get great 60 ft's?

That is an intro for beginers, not the official launching method I use at the track that is obvious on my reaction times and 60's

I have been promissing a another vid of the official method I use at teh track, just been lazy. I will aventually make it public to make it more competitive among the 335is tunes

Quote:

Originally Posted by busta7777

Im at 17k
411 with 457 tq pro tuned since 10k
Tuned since 2k on e40
Clutch doesnt spin with pro tune but
When i stacked jb4 +cobb it did

Im about to be installing rb turbos by begging of march let u guys know how it goes

I also only lauchned about 15 times since i had the car only WOT at around 2nd gear through 5th

IMO, it seems the slippage is more prone to happen on piggybacks. I think the reason for this is because the DCT is reading values directly from the DME, and not the piggyback, as clutch pressure on the DCT is passive not active

As you noticed,I have more clutch pressure on clutch 1 which is the clutch used for launching. Any newly added power you have to give the DCT time to adapt as far as exclusively flash tunes are concerned.

mdyates · 02-13-2013, 11:06 AM

Thanks BuraQ! I am going to Bradenton Sunday, Any info would help! Has anyone (JB4) tried limiting boost to say 7-8 psi in 1st and using LC?

M3coupe · 02-13-2013, 12:02 PM

Quote:

Originally Posted by _ink

Quote:

Originally Posted by romanonj

What a great thread! Having owned my IS a little over two months now, I am noticing that it is a lot happier in either full auto with sport on, or manual mode with or without sport mode. When you refer to dtc off and completely off, what do you mean? One press of a button it is off, I am not aware of any secondary deactivation.. I may be wrong.

Thanks!

One press is partially off, and the second option is press and hold for 5 seconds for completely off.

I believe this to be incorrect. My understanding is DTC is partially on by default. One quick press puts it full on and one long several second press turns completely off? Someone correct me if I'm wrong

romanonj · 03-14-2013, 10:44 AM

Sorry to bring this back, but wanted to pose a question here..

There is one annoyance with DCT (at least in my mind), where while accelerating in manual mode, flooring gas pedal automatically downshifts. This is particulary annoying when I already downshifted to engine "sweet" spot (around 3500 - 4000 rpm), and then tranny shifts it into lower gear and puts it in the dead rpm spot 5500 rpms+.. Is there a way to turn this feature off?

Jeff@TopGearSolutions · 03-14-2013, 11:25 AM

Quote:

Originally Posted by romanonj

Sorry to bring this back, but wanted to pose a question here..

There is one annoyance with DCT (at least in my mind), where while accelerating in manual mode, flooring gas pedal automatically downshifts. This is particulary annoying when I already downshifted to engine "sweet" spot (around 3500 - 4000 rpm), and then tranny shifts it into lower gear and puts it in the dead rpm spot 5500 rpms+.. Is there a way to turn this feature off?

Don't hit the kick down pedal and use Manual Mode. (I'm assuming the DCT has one just like Auto).

View Poll Results: Does your DCT slip and/or Have Problems with 400tq+ ?
I have a DCT with 400tq+ and my clutch slips (I HAVE abused my transmission)	4	13.79%
I have a DCT with 400tq+ and my clutch slips (I have NOT abused my transmission)	9	31.03%
I have a DCT with 400tq+ and NO problems with my transmission (I HAVE abused my transmission)	9	31.03%
I have a DCT with 400tq+ and NO problems with my transmission (I have NOT abused my transmission)	7	24.14%
Voters: 29. You may not vote on this poll

02-07-2013, 02:49 PM	#45
Kcyrusm Second Lieutenant Drives: 2012 335is DCT Join Date: Oct 2010 Location: N. VA Posts: 291 iTrader: (1)	Great info guys, keep it comin! Can't wait to hear back with updates on the mechatronic tuning and upgraded turbo setups. BuraQ, I see you broke into the 11's!!!!! Congrats dude!!!!!! Update: I'm at 11,000 miles now, still going strong on my DCT, no slipping. There is a slight delay in power delivery on WOT, but Jake@PTF had told me previously that it is a known thing with the Cobb tune and is probably saving my clutches. I think I remember him saying it can be removed, but I don't wanna risk the stress. __________________ ________________ BMS DCI \| AR Catless DP's \| ETS FMIC \| E38 Map Cobb Protuned by Jake@PTF 2012 BMW 335is: 11.926 @ 117.710 MPH (stock runflats)

02-07-2013, 10:11 PM	#47
romanonj First Lieutenant Drives: X3 and 335is w/DCT Join Date: Jan 2012 Location: New Jersey, Ocean County Posts: 323 iTrader: (6)	What a great thread! Having owned my IS a little over two months now, I am noticing that it is a lot happier in either full auto with sport on, or manual mode with or without sport mode. When you refer to dtc off and completely off, what do you mean? One press of a button it is off, I am not aware of any secondary deactivation.. I may be wrong. Thanks! __________________ 2011 e92 335is DCT 2007 X3 2006 e90 330i 132k miles SOLD!

03-14-2013, 10:44 AM	#54
romanonj First Lieutenant Drives: X3 and 335is w/DCT Join Date: Jan 2012 Location: New Jersey, Ocean County Posts: 323 iTrader: (6)	Sorry to bring this back, but wanted to pose a question here.. There is one annoyance with DCT (at least in my mind), where while accelerating in manual mode, flooring gas pedal automatically downshifts. This is particulary annoying when I already downshifted to engine "sweet" spot (around 3500 - 4000 rpm), and then tranny shifts it into lower gear and puts it in the dead rpm spot 5500 rpms+.. Is there a way to turn this feature off? __________________ 2011 e92 335is DCT 2007 X3 2006 e90 330i 132k miles SOLD!

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02-08-2013, 08:37 AM	#48
mdyates Private First Class Drives: 13 335is DCT JB4 Join Date: Jul 2011 Location: Orlando Posts: 156 iTrader: (1)	Good info!! How are you two launching your DCT? I see the two step technique out there, but would like to know what technique you're using to get great 60 ft's?

02-13-2013, 05:01 AM	#49
busta7777 Lieutenant Drives: N54 335iS Join Date: Apr 2010 Location: 562 Posts: 583 iTrader: (4)	Im at 17k 411 with 457 tq pro tuned since 10k Tuned since 2k on e40 Clutch doesnt spin with pro tune but When i stacked jb4 +cobb it did Im about to be installing rb turbos by begging of march let u guys know how it goes I also only lauchned about 15 times since i had the car only WOT at around 2nd gear through 5th

02-13-2013, 11:06 AM	#52
mdyates Private First Class Drives: 13 335is DCT JB4 Join Date: Jul 2011 Location: Orlando Posts: 156 iTrader: (1)	Thanks BuraQ! I am going to Bradenton Sunday, Any info would help! Has anyone (JB4) tried limiting boost to say 7-8 psi in 1st and using LC?