double clutch vs manual

[MORIAL]

Does anyone know how much faster to double clutch is over the manual

[elh0102]

I recently bought an '11 Coupe with DCT, after a lifetime of conventional manual transmissions. No doubt the DCT is faster in shifts, but unless you earn your living driving, does it make any difference? Drive them both and buy your preference. I opted for it after owning a GT3. The BMW clutch and shifter are relatively crappy in comparison. So far, I'm satisfied, no problems. Have not had it on track yet, but I'm looking forward to it, probably next spring.

[1cleanm6]

its pretty hard to say im sure a very well driver in a 6 speed can match dct.

I have a 6 speed btw and for me it doesnt matter because i never even go near redline, its pretty rare.

[saeedg48]

it's much faster. I had the opportunity of going head to head with a DCT, I've got the manual and by 130MPH he was a good 1.5 - 2 car lengths ahead of me. His take off was faster and his 1-2 gear change was much less dramatic.

If you're asking this question because you're trying to decide between the two, I would say go for the DCT. When there's next to no traffic I love the 6MT otherwise the DCT is better in my opinion.

The 6MT is more rewording under hardcore driving.

[MVF4Rrider]

Originally Posted by 1cleanm3

its pretty hard to say im sure a very well driver in a 6 speed can match dct.

impossible to match is more accurate. The DCT really earns its merit in downshifting and short shifting mid corner. There are reasons these days no true race car has a standard (traditional) manual gearbox. Too limiting and too easy to blow the motor by over revving it (especially during aggressive downshifts). All that aside, I like both equally.

[MVF4Rrider]

Originally Posted by saeedg48

The 6MT is more rewording under hardcore driving.

Don't mean to disagree twice on the bounce, but 6MT is least rewarding at very aggressive driving. Don't make the mistake of "move involvement" as better or more rewarding. More rewarding is blipping down the gears under extreme braking, and shifting when ideal, not just when a 6 MT allows it without upsetting the chassis. Master the DCT and you'll never look back. Drive both "hardcore" on the Nurburgring and you'll know what I'm talking about. If all you do is aggressively drive to Starbucks, sell the BMW and buy a minivan.

[Scoobe]

One requires a developed skill to maximize, the other doesn't. I'm lazy and have the DCT. When I want my 6MT fix, I take the Shelby out, but I only break her out on occasion. But to be honest, if the Shelby had a DCT option, I'd get it with it too. You get to concentrate more on managing your RPM's than clutching and shifting.

[dizzyj]

its 6 faster

[crackberry]

Originally Posted by Scoobe

One requires a developed skill to maximize, the other doesn't. I'm lazy and have the DCT. When I want my 6MT fix, I take the Shelby out, but I only break her out on occasion. But to be honest, if the Shelby had a DCT option, I'd get it with it too. You get to concentrate more on managing your RPM's than clutching and shifting.

im also lazy and wont be getting a manual.

cheers to sloth

[Scoobe]

Originally Posted by crackberry

im also lazy and wont be getting a manual.

cheers to sloth

LOL that should be our counter to the Club 6MT, Club Sloth with a picure of the DCT shifter and the paw of a sloth.

[luckistryke]

Originally Posted by Scoobe

LOL that should be our counter to the Club 6MT, Club Sloth with a picure of the DCT shifter and the paw of a sloth.

That actually sounds pretty good.

[Donbona]

It all depends what you want in a car, yes dct is quicker in most aspects but some drivers want the raw feeling of a MT...
I drive a dct but im a lasy ass

[crackberry]

and sport and sloth even have the same number of letters. lol sounds like a viable alternative

club sloth all the way for sure!

[michaelthepsycho]

Originally Posted by MVF4Rrider

[...] Don't make the mistake of "mo[r]e involvement" as better or more rewarding. More rewarding is blipping down the gears under extreme braking, and shifting when ideal, not just when a 6 MT allows it without upsetting the chassis. Master the DCT and you'll never look back. [...]

Couldn't have said it better myself. Manuals may be fun to drive on the street but in an extreme situation on the track, people really don't need two more distractions.

[quiksi]

DCT is definitely faster, although if I was buying a car purely for performance reasons it wouldn't be an M3

[Groundhog]

From what I hear manuel is better at the track; the slushboxes get really irritable after being lit up over hard session.

I've driven both back to back. I like the DCT's smoothness and F1 sound.

[330CIZHP]

DLSJ5 raced his M-DCT coupe with similar mods versus JonMartin's 6 speed manual M3 sedan and both were neck-and-neck all the way to 150 mph.

Although, JonMartin had to hit all his shifts perfectly to keep with the M-DCT.

M-DCT also tries to "predict" your next shift and pre-selects the gear with the disengaged clutch. If you go against its "prediction" on the race track especially, it becomes confused and in haste tries to correct the gear selected in the disengaged clutch causing a big lag.

[MVF4Rrider]

Originally Posted by 330CIZHP

DLSJ5 raced his M-DCT coupe with similar mods versus JonMartin's 6 speed manual M3 sedan and both were neck-and-neck all the way to 150 mph.

Although, JonMartin had to hit all his shifts perfectly to keep with the M-DCT.

M-DCT also tries to "predict" your next shift and pre-selects the gear with the disengaged clutch. If you go against its "prediction" on the race track especially, it becomes confused and in haste tries to correct the gear selected in the disengaged clutch causing a big lag.

When on power, it predicts and prepares for an upshift (unless already in top gear). When off throttle, it prepares for a possible downshift. Only an idiot would shift up or down while out of sync with the appropriate throttle input. DCT can't make up for brainless twits.

[powertrip]

Jon's car was also putting out more power than Drews's car. That comparison really showed how potent cat delete & an OE tune can be. FYI, Drew destroyed every other 6 speed he went up against.

Originally Posted by 330CIZHP

DLSJ5 raced his M-DCT coupe with similar mods versus JonMartin's 6 speed manual M3 sedan and both were neck-and-neck all the way to 150 mph.

Although, JonMartin had to hit all his shifts perfectly to keep with the M-DCT.

M-DCT also tries to "predict" your next shift and pre-selects the gear with the disengaged clutch. If you go against its "prediction" on the race track especially, it becomes confused and in haste tries to correct the gear selected in the disengaged clutch causing a big lag.

[SunnyD]

The DCT is so incredibly smooth and fast, it makes the SMG look like a newb manual driver. Some people complain that the DCT almost feels too much like an automatic transmission, but I think it's technology at its finest. I do find myself missing driving a traditional manual, though.

[Donbona]

Originally Posted by MVF4Rrider

When on power, it predicts and prepares for an upshift (unless already in top gear). When off throttle, it prepares for a possible downshift. Only an idiot would shift up or down while out of sync with the appropriate throttle input. DCT can't make up for brainless twits.

I never knew how to explain this before (I had the same thoughts).... but you have done a great job... thanks

[ns2000x]

Originally Posted by MVF4Rrider

Don't mean to disagree twice on the bounce, but 6MT is least rewarding at very aggressive driving. Don't make the mistake of "move involvement" as better or more rewarding. More rewarding is blipping down the gears under extreme braking, and shifting when ideal, not just when a 6 MT allows it without upsetting the chassis. Master the DCT and you'll never look back. Drive both "hardcore" on the Nurburgring and you'll know what I'm talking about. If all you do is aggressively drive to Starbucks, sell the BMW and buy a minivan.

Arguing over what is "more rewarding" is as counterproductive as arguing if steak or lobster tastes better. Point being, it is purely personnel preference. However I do follow the point you are trying to make, that being exactly that different people, can find different aspects rewarding, and that someone shouldn't overlook something they have yet to experience themselves.

Cheers.

PS: <rant> $3900 CDN for the DCT is a good enough reason not to bother for people like me riding the fence. As a no cost option it would be a coin flip for me. </rant>