[335iFFM]

Originally Posted by BMDUB1

Yep its been on a Dyno jet, I don't post numbers, mostly because they all differ and really don't mean much. They are really good tho.

I usually don't comment much on the forums but I liked this thread because I run the same tune, and you know how some members can be...lol

No. Tranny is not slipping. It's Boost control - look at the Logs and RPM. I run more Boost than you do by the way ;-). 22psi on OEM turbo. Same on Stg1 Turbo. The cause seems to be in the Load tables

[335iFFM]

Update from BMW MUC:
AFR drop is intended. It should be there. The power loss shouldn't be there. Dzenno fixed the power loss.

Why should it be there (source: BMW TECH)
It's there to cool the piston. If it wouldn't be there the piston would burn as the DCT cuts ignition and the combustion chamber would get every hot. So this is a must have and HAS to be there.

I'll change the OP accordingly. Cobb still needs to fix the power loss. Dzenno knows how to. Call him

As always this only accounts to DCTs!

Best,
M

[iuhutch]

Originally Posted by JETmn

Been on there over a year...

Ditto been there for few years. 80% problems come from improper installation and it is sensitive to octane. Where I live we have e85 and the jb4 w e85 adapter is just galore

[iuhutch]

Originally Posted by BMDUB1

Weird... I had issues galore with the jb4 and none with my Cobb?

I love my Cobb, Jb4 was always throwing codes and getting limp modes?

Good luck!

I went the other way: Cobb -> BMS. Happy with the decision, just may take a little more map tweaking than the Cobb with OTS. Also late to market and limited to specific years. Terry also only guy to support bigger turbos ATM

[Nugget]

Originally Posted by iuhutch

I went the other way: Cobb -> BMS. Happy with the decision, just may take a little more map tweaking than the Cobb with OTS. Also late to market and limited to specific years. Terry also only guy to support bigger turbos ATM

Who told you that?

[jayzF30]

Originally Posted by iuhutch

I went the other way: Cobb -> BMS. Happy with the decision, just may take a little more map tweaking than the Cobb with OTS. Also late to market and limited to specific years. Terry also only guy to support bigger turbos ATM

JB is just a glorified boost controller and not an actual tune. If you think tuning is all about raising boost then JB is a hell of a "tune" for you.

[Subaru335i]

Originally Posted by jazze90

JB is just a glorified boost controller and not an actual tune. If you think tuning is all about raising boost then JB is a hell of a "tune" for you.

This is true, luckily the BMW's DME is pretty smart and cranking up the boost with JB doesn't usually blow stuff up.

[iuhutch]

Originally Posted by Nugget

Who told you that?

sorry, should have been more detailed. only guy i've seen that has tested, supports and builds maps for bigger turbos on the n55. i think ptf is now as well but i havent seen any data from them or anyone else yet...

[iuhutch]

Originally Posted by jazze90

JB is just a glorified boost controller and not an actual tune. If you think tuning is all about raising boost then JB is a hell of a "tune" for you.

may be a different way of tuning but per my experience, car feeling, having no issues, a great support team and a great running car is good enough for me.

[Swadeness]

I'm so happy I found this thread! I'm also in Germany and routinely have the car enter limp mode at speeds over 200 km/h. It's very frustrating and unsafe to have that happen at speed on the Autobahn or the Ring. I think I'll give PTF a call to see if they can help. For those of you experiencing power loss after a high RPM shift in DCT cars.....do you get the same result with and without the sport button pushed? I get better results if I do not use the sport button. I'm not 100% sure why this is but it does help the stuttering or power lag after a hard shift. I've had the same issue regardless of the traction control setting so I don't think its a throttle closure related to the DTC.

[Mannix]

Interesting thread.

Being new to the 335i, I have been joining forums and soaking up as much information as I can (as well as learning all the acronyms being used: FBO, CP, etc.; but I still don't know what "DCT" is), in order to make a well-informed decision on how to modify my car. Currently, it's bone stock.

I have been leaning towards Cobb until I read this thread. Now, JB4 is looking better.

So, Cobb, if you're monitoring this thread, hopefully you're working on these issues and will get them sorted out soon.

[Johnny Boost]

Originally Posted by Swadeness

I'm so happy I found this thread! I'm also in Germany and routinely have the car enter limp mode at speeds over 200 km/h. It's very frustrating and unsafe to have that happen at speed on the Autobahn or the Ring. I think I'll give PTF a call to see if they can help. For those of you experiencing power loss after a high RPM shift in DCT cars.....do you get the same result with and without the sport button pushed? I get better results if I do not use the sport button. I'm not 100% sure why this is but it does help the stuttering or power lag after a hard shift. I've had the same issue regardless of the traction control setting so I don't think its a throttle closure related to the DTC.

This may be a silly question but are you using DTC or are you disabling traction control completely? Also, what code(s) is your car throwing when it goes into limp mode?

[Walker16]

Originally Posted by Mannix

Interesting thread.

Being new to the 335i, I have been joining forums and soaking up as much information as I can (as well as learning all the acronyms being used: FBO, CP, etc.; but I still don't know what "DCT" is), in order to make a well-informed decision on how to modify my car. Currently, it's bone stock.

I have been leaning towards Cobb until I read this thread. Now, JB4 is looking better.

So, Cobb, if you're monitoring this thread, hopefully you're working on these issues and will get them sorted out soon.

DCT is dual clutch transmission. It is on new bmws

Or if you mean DTC it MEAND dynamic traction control.
Normally its fully on...
press once for half on allows for a little bit more slide or loss in grip..
press and hold for a few seconds fully off

[Mannix]

Originally Posted by Walker16

DCT is dual clutch transmission. It is on new bmws

Or if you mean DTC it MEAND dynamic traction control.
Normally its fully on...
press once for half on allows for a little bit more slide or loss in grip..
press and hold for a few seconds fully off

I know what DTC is. And thanks to you, I now know what DCT is.

How do I know if I have it? I have a '11 E92 335i N55. No M-package. No sport-package.

[Walker16]

You don't have it. It is the 7 speed transmission on the new models

[Newguy123]

Originally Posted by Mannix

I know what DTC is. And thanks to you, I now know what DCT is.

How do I know if I have it? I have a '11 E92 335i N55. No M-package. No sport-package.

You don't only 3 series that have it are the "IS" models

[Johnny Boost]

Originally Posted by Newguy123

You don't only 3 series that have it are the "IS" models

The Euro 335 models had DCT as an option. So there are some non-IS models with DCT.

[Swadeness]

Originally Posted by Johnny Boost

This may be a silly question but are you using DTC or are you disabling traction control completely? Also, what code(s) is your car throwing when it goes into limp mode?

I normally drive with the nannies on but I've experienced the stutter in all modes of DTC. Running with milder tune helps obviously. The stutter (and resulting limp mode if keep my foot in it) and the shutting off at high speed are probably separate issues. When I had the last high speed limp mode I had fault code 36CA.

[M.a.r.k.u.s]

Originally Posted by Swadeness

I'm so happy I found this thread! I'm also in Germany and routinely have the car enter limp mode at speeds over 200 km/h. It's very frustrating and unsafe to have that happen at speed on the Autobahn or the Ring. I think I'll give PTF a call to see if they can help. For those of you experiencing power loss after a high RPM shift in DCT cars.....do you get the same result with and without the sport button pushed? I get better results if I do not use the sport button. I'm not 100% sure why this is but it does help the stuttering or power lag after a hard shift. I've had the same issue regardless of the traction control setting so I don't think its a throttle closure related to the DTC.

Not sure what tune you have but this used to happen to me when shifting from 4th to 5th (I'm 6AT). I have a JB4, sent some logs to bms and found out that it was due to boost spikes during shifting. They told me to set the boost failsafe to 21 psi and the auto shift damper to 70. So far it has worked and the car hasn't gone into limp mode.

[K.david]

I'm on the fence about getting a cobb as i have a 135 with DCT trans. I like the fact that I'm actually purchasing a tune with cobb and not a complicated sensor augmentation device from Burger, even though its a good deal. I really hope Cobb figures it out. By the way who/what is this PTF everyones referring to?

[Johnny Boost]

Originally Posted by K.david

I'm on the fence about getting a cobb as i have a 135 with DCT trans. I like the fact that I'm actually purchasing a tune with cobb and not a complicated sensor augmentation device from Burger, even though its a good deal. I really hope Cobb figures it out. By the way who/what is this PTF everyones referring to?

PTF is Pro Tuning Freaks. They do dyno, remote dyno and e-tunes. They built their reputation by being the most popular tuner for the N54s on e90post. Now they offer the same services for the N55. I've been working with Dzenno from PTF and it's been a great experience.

Here is their website:

http://www.protuningfreaks.com/tunin...otune-bmw.html

[Newguy123]

Originally Posted by K.david

I'm on the fence about getting a cobb as i have a 135 with DCT trans. I like the fact that I'm actually purchasing a tune with cobb and not a complicated sensor augmentation device from Burger, even though its a good deal. I really hope Cobb figures it out. By the way who/what is this PTF everyones referring to?

IF you can get Cobb do it. I wish I could the jb4 is now causing my trans to slip and there is no support from Cobb. Get the Cobb tune if you are compatible before you start slipping too