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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > COBB & 335is DCT Launch Control



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      02-18-2012, 02:39 PM   #1
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@ Cobb

I was going to send an email to you all with this question, but I think it would better serve as a guide for those with the 335is DCT interested in the COBB AP.

I finally bought another car, and now my 335is DCT is next in line for some AR Downpipes to run Stage 2+ FMIC maps with Dinan Stage 3 "mods". The Dinan CAI is being added to the list.

So you have an idea the power plant being built here, now my only concern is the launch control.

Stock LC is 5K rpms that drops to about 3-4K rpms on WOT which result in ultimate wheel spin. How near are we to getting LC dropped to 3K RPM on WOT on the Cobb AP ?


I know I can get 11s using Stage 2 + FMIC but not without usign LC in some sort of way.

For others: Please do not comment about my Dinan warranty and DPs, I have been down that alley and its been secured.

Thanks

Last edited by BQTuning; 02-18-2012 at 03:26 PM..
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      02-18-2012, 02:42 PM   #2
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Quote:
Originally Posted by BuraQ View Post

For others: Please do not comment about my Dinan warranty and DPs, I have been down that alley and its been secured.

Thanks
You KNOW it's inevitable...
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      02-18-2012, 03:49 PM   #3
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Email cobb and talk to Rob Irish directly, Dzenno has been doing that for a long time about his RBs and big turbo maps. I would think it wouldn't be too big of a deal to get that taken care of.
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      02-18-2012, 04:44 PM   #4
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Cobb replied in the Cobb Discussion thread a few days back saying their first priorities are to release the reworked maps (Stage 1+FMIC, revised Stage 2+, etc)....after that they plan to work on/release the LC but not sure if the LC is exclusive for the -is version or not...

Either way...as rader1 said send Rob a message...I sent him one yesterday and he was VERY prompt, quick and helpful replying..
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      02-20-2012, 02:38 AM   #5
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Can they do it for the non-is?
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      02-20-2012, 08:47 AM   #6
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Quote:
Originally Posted by BuraQ View Post
@ Cobb

I was going to send an email to you all with this question, but I think it would better serve as a guide for those with the 335is DCT interested in the COBB AP.

I finally bought another car, and now my 335is DCT is next in line for some AR Downpipes to run Stage 2+ FMIC maps with Dinan Stage 3 "mods". The Dinan CAI is being added to the list.

So you have an idea the power plant being built here, now my only concern is the launch control.

Stock LC is 5K rpms that drops to about 3-4K rpms on WOT which result in ultimate wheel spin. How near are we to getting LC dropped to 3K RPM on WOT on the Cobb AP ?


I know I can get 11s using Stage 2 + FMIC but not without usign LC in some sort of way.

For others: Please do not comment about my Dinan warranty and DPs, I have been down that alley and its been secured.

Thanks
i'd be more concerned about the dct transmission slipping at that torque level than the launch control, honestly
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      02-20-2012, 01:39 PM   #7
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Quote:
Originally Posted by bryce View Post
i'd be more concerned about the dct transmission slipping at that torque level than the launch control, honestly
According to Vish and some posts from BMS, slipping occures due to pre-exisitng abuse.

I have compared Cobb Stage 2+FMIC with the Dinan S3 and the difference is minimal on the "low end" based on the dynos provided on Cobb's site

Currently I am not experiencing any slipping with LC except wheel spin
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      02-20-2012, 02:17 PM   #8
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Quote:
Originally Posted by BuraQ View Post
According to Vish and some posts from BMS, slipping occures due to pre-exisitng abuse.

I have compared Cobb Stage 2+FMIC with the Dinan S3 and the difference is minimal on the "low end" based on the dynos provided on Cobb's site

Currently I am not experiencing any slipping with LC except wheel spin
the difference in torque is pretty substantial, IMO, between dinan stage 3 and cobb stage 2+
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      02-20-2012, 03:13 PM   #9
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Quote:
Originally Posted by BuraQ View Post
According to Vish and some posts from BMS, slipping occures due to pre-exisitng abuse.

I have compared Cobb Stage 2+FMIC with the Dinan S3 and the difference is minimal on the "low end" based on the dynos provided on Cobb's site

Currently I am not experiencing any slipping with LC except wheel spin
Based on dynos or based on actually using both? COBB Stage 2+ is far more powerful.

Slipping occurs because of too much torque between shifts I believe. Shiv said a while ago that the Procede targets lower boost between shifts to save the DCT.
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      02-20-2012, 05:33 PM   #10
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Quote:
Originally Posted by bryce View Post
the difference in torque is pretty substantial, IMO, between dinan stage 3 and cobb stage 2+
To be fair on this since we are addressing the DCT, I will have to run dynos on the same car of both tunes.

Quote:
Originally Posted by Brey335i View Post
Based on dynos or based on actually using both? COBB Stage 2+ is far more powerful.

Slipping occurs because of too much torque between shifts I believe. Shiv said a while ago that the Procede targets lower boost between shifts to save the DCT.
Based on dynos, cant comment on using both until I flash to Cobb
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      02-21-2012, 07:44 AM   #11
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is the DCT in these cars this weak when combined with tuned N54?
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      02-21-2012, 07:56 AM   #12
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Quote:
Originally Posted by Bash View Post
is the DCT in these cars this weak when combined with tuned N54?
yes it is if you load massive torque at low rpm, steptronic is stronger.
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      02-21-2012, 10:56 AM   #13
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Quote:
Originally Posted by BuraQ View Post
To be fair on this since we are addressing the DCT, I will have to run dynos on the same car of both tunes.



Based on dynos, cant comment on using both until I flash to Cobb
I think you will be surprised at how much torque it generates when you flash to Cobb. It was the first thing I noticed when I switched.
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      02-21-2012, 11:51 AM   #14
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Quote:
Originally Posted by Bash View Post
is the DCT in these cars this weak when combined with tuned N54?
Cant say for sure, because ALL 3 authorities that have experienced slipping addmited to previous abuse on the DCT. Atm it is generally accepted that on a non-abused DCT should hold safetly about 450 wtq

Quote:
Originally Posted by enrita View Post
yes it is if you load massive torque at low rpm, steptronic is stronger.
See above reply...

Quote:
Originally Posted by RnmEvo9 View Post
I think you will be surprised at how much torque it generates when you flash to Cobb. It was the first thing I noticed when I switched.
Remember I was there with you and I looked at your slip vs my 12.5 slip, there was minimal difference within 1/8 mile. After 1/8 mile is when you tour hell apart........,and your lighter also . The top end is what I need from Cobb...
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      02-21-2012, 12:14 PM   #15
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Buraq, yout 1/8th ET was the same but look at the 60' and tap speeds. It's more like he caught you at the 1/8th and just kept pulling way. Rnm was 4mph quicker in the 1/8th and 9mph quicker in the quarter. To me, that says there is nowhere in THAT camparo did the Dinan stage 3 compete with a stage 2+ cobb car.
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      02-21-2012, 12:27 PM   #16
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Agreed!
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      02-21-2012, 12:29 PM   #17
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Quote:
Originally Posted by BuraQ View Post
Cant say for sure, because ALL 3 authorities that have experienced slipping addmited to previous abuse on the DCT. Atm it is generally accepted that on a non-abused DCT should hold safetly about 450 wtq
if by previous abuse, you mean drag strip visits and WOT pulls, wouldn't that encompass a lot of dct owners?
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      02-21-2012, 01:09 PM   #18
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Quote:
Originally Posted by rader1 View Post
Buraq, yout 1/8th ET was the same but look at the 60' and tap speeds. It's more like he caught you at the 1/8th and just kept pulling way. Rnm was 4mph quicker in the 1/8th and 9mph quicker in the quarter. To me, that says there is nowhere in THAT camparo did the Dinan stage 3 compete with a stage 2+ cobb car.
I was commenting on the "low end" minimal difference not mid or top end where the Cobb S2+ is clearly superior in performance

I am not attesting that Dinan S3 is better than Cobb Stage 2+ . I know Cobb stage 2+ is better, as a falsh for racing, or I wouldnt be going to it.

All of this was summed up in lieu that Cobb Stage +FMIC will not have an impact on the 335is DCT slipping if Dinan S3, by comparison of "low end" torque delivery, did not faulter the DCT

So in other words I cant see how Cobb Stage 2+ would be an issue using LC

Quote:
Originally Posted by bryce View Post
if by previous abuse, you mean drag strip visits and WOT pulls, wouldn't that encompass a lot of dct owners?
I have been to the DS plenty of times and I dont think I have abused the DCT. Not like how Vish, Terry, and a M3 DCT owner (Article: DCT Build Part....) did..... I dont have radials, I dont run meth, I dont run a tune that doesnt compromise power.

Vish admiited it, a M3 DCT owner admitted it (from another forum that cannot be mentioned here), and I am pretty sure that Terry will admit this.

The rumor that the DCT is weak, or about DCT slipping is stemming from these three sourced experiences which have been misscrutinized and popagated out of context.
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      02-21-2012, 01:30 PM   #19
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Launch Control is definitely something we want to look in to for the future. We don't have any kind of time frame of when it might be available, but it's on our list of "cool things we can't wait to get to"!

Ian
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      02-22-2012, 06:57 AM   #20
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Quote:
Originally Posted by BuraQ View Post
Cant say for sure, because ALL 3 authorities that have experienced slipping addmited to previous abuse on the DCT. Atm it is generally accepted that on a non-abused DCT should hold safetly about 450 wtq



See above reply...



Remember I was there with you and I looked at your slip vs my 12.5 slip, there was minimal difference within 1/8 mile. After 1/8 mile is when you tour hell apart........,and your lighter also . The top end is what I need from Cobb...
Just looking at those slips, i would say there is about 50whp difference between these runs when considering trap speeds.
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      02-22-2012, 12:19 PM   #21
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Quote:
Originally Posted by Bash View Post
Just looking at those slips, i would say there is about 50whp difference between these runs when considering trap speeds.
Before flashing to Cobb I will get a dyno run done on the Dinan S3 to compare them on wtq. Not concerned about HP, but am concerned about the torque wuth LC
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      02-23-2012, 09:44 AM   #22
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Hey BuraQ, sorry I don't mean to thread jack but when did Cobb release an update for the 335is? A few months ago I was told that there was no difference between the 335i and 335is engine and that we would use the same maps as the 335i and 135i.
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