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007335i 007335i is offline
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Default 335is DCT? - 08-19-2016, 10:52 PM

I'm thinking about selling my 6MT and buying a 335is with a DCT. I'm going to mod it, and want to know what are the pros/cons about this platform.
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ricecrackers101 ricecrackers101 is offline
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Default 08-20-2016, 04:00 AM

pros - faster shifting, no shift bog, better looks
cons - car is more expensive, upgraded clutch packs are expensive
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A418t81 A418t81 is offline
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Default 08-20-2016, 07:39 AM

I've had 3 335s in the past and the 335is with the DCT that I have now is by far my favorite. The transmission is excellent and really, really complements the N54 as you mod it. It has a much different feel to it than the regular auto.


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BEAR-AvHistory BEAR-AvHistory is offline
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Default 08-20-2016, 11:30 AM

There are no cons!!!


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2011z435is 2011z435is is offline
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Default 08-21-2016, 03:45 PM

the only con I can think of is trying to launch it (if you are fbo)
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T3hD0gg T3hD0gg is offline
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Default 08-21-2016, 04:50 PM

I've actually just done a similar change (E90 335i xDrive with a manual to 335is with DCT) and I love the near instant manual shifts along with the smooth automatic shifts when moving around town. Yes, there was quite a price difference but with what I wanted to do with the car, it made sense to make the change.
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007335i 007335i is offline
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Default 08-21-2016, 08:34 PM

Quote:
Originally Posted by T3hD0gg
I've actually just done a similar change (E90 335i xDrive with a manual to 335is with DCT) and I love the near instant manual shifts along with the smooth automatic shifts when moving around town. Yes, there was quite a price difference but with what I wanted to do with the car, it made sense to make the change.
I took one for a test drive last week, and loved everything about it. What do you plan on doing with yours?
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T3hD0gg T3hD0gg is offline
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Default 08-21-2016, 09:02 PM

Quote:
Originally Posted by 007335i
I took one for a test drive last week, and loved everything about it. What do you plan on doing with yours?
Everything I planned on doing with my E90. I purchased Pure's Stage 2 turbos a while ago and they were delivered over a month ago and they've been sitting in my kitchen along with various supporting add-ons like inlets, outlets and port injection. I have an MFactory LSD coming in this coming week as well.

If the clutches start slipping or the transmission seems to start overheating at the track, I plan on throwing in SSP Performance's clutches or their heavy duty cooling package respectively.

Plenty of go fast bits while retaining most of the low-end torque.

The main reason I switched away from my previous car is because of the added weight and drivetrain loss due to xDrive wasn't something I was a fan of and I figured if I was going to make a BMW go fast, I might as well do it with the drivetrain it was made for and enjoy a little bit of sliding at the track. The DCT was just a nice touch to sweeten the idea. If I had hated the DCT, I probably would have gone with a manual 335is.
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Aaron Aaron is offline
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Default 08-21-2016, 10:00 PM

Quote:
Originally Posted by T3hD0gg
I probably would have gone with a manual 335is.
That's what I did, couldn't be happier. Hate automatics.
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T3hD0gg T3hD0gg is offline
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Default 08-22-2016, 05:46 AM

Quote:
Originally Posted by Aaron
That's what I did, couldn't be happier. Hate automatics.
My first four cars were manual (and this 335is is now my fifth) so I felt the same way. For others, I recommend at least giving the DCT a try and seeing how you feel about both before making a decision.
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007335i 007335i is offline
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Default 08-22-2016, 01:06 PM

Are there any DCT flashes?
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MFactory MFactory is offline
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Default 08-22-2016, 01:12 PM

DCT's are the way forward, and has been the case with every car that I have owned

Every car that I own now is a DCT, and do not even miss an MT one bit (especially in traffic! lol)


MFactory / YCW Engineering (LSD's, Gears, Flywheels, Clutches, Driveshafts, Axles) - www.teammfactory.com
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Aaron Aaron is offline
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Default 08-22-2016, 04:40 PM

In that sense, self-driving cars is the way forward. You won't miss driving one bit.
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Terry @ BMS Terry @ BMS is offline
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Default 08-22-2016, 04:51 PM

We have a 2012 335is DCT. Nice car and it shifts fast. As long as you keep it under 550whp shouldn't be an issue. Above that and you may need to upgrade the DCT clutch packs.


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Default 08-22-2016, 07:09 PM

Quote:
Originally Posted by 007335i
Are there any DCT flashes?
There isn't a performance flash or anything (like Alpina flashes for the standard automatics) but there is a flash to lower the launch control RPM from 5000 to 3500. You can find it talked about here and steps at the bottom of the page if you're familiar with WinKFP. I've successfully done the flash and confirmed that it revs to 3500 RPM but I haven't actually launched it with the change yet. I'm waiting for my LSD to get in and to install a differential brace to reduce the wheel hop.
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007335i 007335i is offline
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Default 08-22-2016, 07:36 PM

Quote:
Originally Posted by T3hD0gg
There isn't a performance flash or anything (like Alpina flashes for the standard automatics) but there is a flash to lower the launch control RPM from 5000 to 3500. You can find it talked about here and steps at the bottom of the page if you're familiar with WinKFP. I've successfully done the flash and confirmed that it revs to 3500 RPM but I haven't actually launched it with the change yet. I'm waiting for my LSD to get in and to install a differential brace to reduce the wheel hop.
I know there's always an issues with traction with n54's. But with DR I was able to grab traction with every launch. Have you tried Drag radials?
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Mixmaster Mixmaster is offline
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Default 08-22-2016, 08:19 PM

Quote:
Originally Posted by MFactory
DCT's are the way forward, and has been the case with every car that I have owned

Every car that I own now is a DCT, and do not even miss an MT one bit (especially in traffic! lol)
It seems the Euro makers are steering away though going 8 speed triptronics. Freind just got a 340i
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007335i 007335i is offline
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Default 08-22-2016, 09:25 PM

Quote:
Originally Posted by Mixmaster
It seems the Euro makers are steering away though going 8 speed triptronics. Freind just got a 340i

I noticed that too. Times are changing for the automotive industries, 8 speed, 9 speeds, and eventually 11 speed transmissions soon, in the name of efficiency; even thought manuals will always be more efficient then any auto.
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007335i 007335i is offline
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Default 08-22-2016, 09:30 PM

Quote:
Originally Posted by MFactory
DCT's are the way forward, and has been the case with every car that I have owned

Every car that I own now is a DCT, and do not even miss an MT one bit (especially in traffic! lol)
What do you offer for the DCT guys?
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keyap keyap is offline
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Default 08-23-2016, 03:40 AM

Quote:
Are there any DCT flashes?
Here you go - jump to post #57

http://www.n54tech.com/forums/showth...t=40495&page=3


UK 2011 - E82- 135i - N55 - DCT

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T3hD0gg T3hD0gg is offline
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Default 08-23-2016, 07:37 AM

Quote:
Originally Posted by 007335i
I know there's always an issues with traction with n54's. But with DR I was able to grab traction with every launch. Have you tried Drag radials?
I just got the car on the 15th so I definitely haven't had the chance to do that..

I don't plan on taking my car to the drag strip often though. Once everything is bolted on, I'd like to see what I can do for a quarter mile time but I'm more interested in setting the car up for road courses or highway touring.
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Default 08-23-2016, 07:39 AM

Quote:
Originally Posted by keyap
Interesting. Should be a nice read. Thanks for the share!
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MFactory MFactory is offline
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Default 08-23-2016, 07:58 AM

Car manufacturers will always make AT/Tiptronic (be it 6/7/8spd etc, as high-end luxury cars will always use this e.g MB, Bentley etc), especially with advances in the TCU programming, and they are going this route with more gears for the DCT as well (my DCT is 7spd)

DCT isn't a replacement for AT; it is an upgrade on the MT, and will replace MT on high-end sports cars (if they already haven't done so. Most already have). Same control as offered by MT, quicker shift times, less clutch wear, idiot-proof (it's impossible to do a 1-2-1), more convenient and, most importantly, safer.

You need to remember, a DCT is NOT an AT (although it does offer an AT function, normally the default setting until you change the shift mode. The AT function is software-related, not hardware-related. An AT is hardware first and foremost).

MT has it's place for die-hards, but drive (and appreciate) a DCT for long enough on both street and track, and you will start wondering why you even bothered with a 3rd pedal.

An analogy for those OAP's like me: Back in the 90's when I had a mobile phone, everyone thought it was pointless and that I was just a poser. Fast forward to the 21st century and guess what? Most people would be paralysed without a mobile phone, and most of the 21st century generation won't even remember a time without one. How many people even use a landline at home anymore?


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Last edited by MFactory; 08-23-2016 at 08:08 AM..
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keyap keyap is offline
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Default 08-23-2016, 12:45 PM

If you go DCT and are looking for high power then slip may be a factor.

I'm not familiar enough with the n54 platform to quote specifics but with the N55s, anything over 18 to 19psi and you'll start to slip.

With the N55, this can be resolved via two options - a DCT flash which can give you a few more PSI or a high load BEF (flash which lets the DME see increased boost and triggers the DCT to apply more pressure).

I'm guessing with the more advanced N54 tuning options there may be other ways too.


UK 2011 - E82- 135i - N55 - DCT

JB4 | BMS OCC | N20 TMap | Fuel-It! PI | AIC6 PI Controller | Fuel-It! Fuel Lines | Fuel-It! Stage 2 LPFP | Continental In-line E Sensor | ER Charge Pipe | Pure Stage 2 Turbo | Pure High Flow Inlet | GFB DV+ | Richter C'less D/Pipe | Berk Race Full Exhaust | MFactory Pro Helical LSD (75% Bias Ratio) | eDiff Disabled Via Coding | MFactory Solid Diff Bushes | Diff Lockdown Bracket | Custom 98G0B BEF | NGK 5992s | KW3 Coilovers
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MFactory MFactory is offline
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Default 08-23-2016, 12:49 PM

Quote:
Originally Posted by keyap
If you go DCT and are looking for high power then slip may be a factor.

I'm not familiar enough with the n54 platform to quote specifics but with the N55s, anything over 18 to 19psi and you'll start to slip.

With the N55, this can be resolved via two options - a DCT flash which can give you a few more PSI or a high load BEF (flash which lets the DME see increased boost and triggers the DCT to apply more pressure).

I'm guessing with the more advanced N54 tuning options there may be other ways too.
Upgraded clutch packs

Expensive (for now), but they do exist.


MFactory / YCW Engineering (LSD's, Gears, Flywheels, Clutches, Driveshafts, Axles) - www.teammfactory.com
YCW Suspension (Mid-Range Coilovers) - www.ycwsuspension.com
SWIFT Springs Europe (Exclusive Distributor) - www.swiftspringseurope.com
SWIFT Springs Asia (Exclusive Distributor) - www.swiftspringsasia.com
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