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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > May be buying DCT



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      07-14-2012, 01:42 PM   #1
bigdnno98
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May be buying DCT

So how much tq can the DCT handle? I'm thinking about getting a 135i with DCT. Of course I plan to go FBO with meth immediately and drag race regularly. I just finished reading up on the DCT but haven't heard of one failing yet. I was reading a little about upgraded clutch packs. Are these readily available and how much are they?

Thanks in advance for your help.
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      07-14-2012, 02:19 PM   #2
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No one has successfully run upgraded clutch packs, AFAIK, and if you are a drag racer, you might want a steptronic car instead. The launch control on the DCTs hasn't produced any good 60 foot times and from the reviews posted on here, is kind of a pain (on the dragstrip).
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      07-14-2012, 02:26 PM   #3
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That's kind of what I was wondering, would I just be better off with a 6AT. In that case I'll prob just look for another n54. Thanks for the input.
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      07-14-2012, 03:40 PM   #4
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Don't discount the majority of owners who absolutely LOVE the DCT on a daily driver basis, or even mild road course use. When it comes down to it, how often are you at the strip? 1% of the time you're using the car?

A 4th gen Camaro (LS1) is the best bang for the buck in terms of modern dragstrip queen cars, IMO, if that's what you're into.
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      07-14-2012, 03:45 PM   #5
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Nah, I hate American cars. I usually go to the drag strip twice a month. I love my 335i. I just can't get the times that the 6AT guys get with my 6MT. I'll prob pick up a 2010 6AT so I can keep my n54.
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      07-16-2012, 08:19 AM   #6
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I LOOVE mine!!
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      07-16-2012, 08:39 AM   #7
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DCT will give you the best drag times (shifts faster, better gearing), but FBO + meth you'll be exceeding the TQ limits (it's 420 ft lbs).

SSP sells 600 + 700 WHP clutch upgrades, there's full threads documenting the DCT upgrade on the M3 forums after all the DCT owners with superchargers started to feel their clutches slipping
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      07-16-2012, 03:11 PM   #8
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yeah was just reading that the clutch disk upgrade up to 600 hp is around $1700 + around $600 labor from my local shop. $2300 isn't too bad I guess, just not sure that it will make a N55 DCT faster than my N54 6MT. (I suck at drag racing the 6MT which is why I'm looking at DCT or 6 AT)
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      07-16-2012, 03:14 PM   #9
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DCT is faster as manual!

If you could eleminate the torque frontier of the standard clutch, it is your best choice
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