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12-03-2007, 04:29 PM | #45 |
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One thing you need to know about these Dual Clutch systems is that though your acceleration will be better than a manual, you actually will feel that you aren't accelerating as fast. It's tricks you senses, because you don't have the dip and then trust as you change gear like you get with the manual so you don't really get much of a sensation of real power.
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12-03-2007, 04:54 PM | #46 | |
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12-03-2007, 05:09 PM | #47 | |
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Drives: 2007 E92 M3
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Does anyone have any data on the flywheel? My impression is that is is fairly insubstantial - the motor loses pretty quickly... |
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12-03-2007, 05:25 PM | #48 | |
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"It is the first time that a double drive plate clutch has been used on an M3. The clutch and the dual-mass flywheel are based on the E6x M5/M6 US (manual gearbox), but their combined weight has been reduced by 4 kg. The contact plate and the transfer plate form a single unit with the integrated clutch driving plate. The following changes have been made compared to the E6x M5/M6 gearbox clutch: The weight of the clutch and the dual-mass flywheel has been reduced. The transfer plate is hollow cast and shaped, similar to an internally ventilated brake disc. This increases heat dissipation and hence the permissible thermal load of the clutch. The clutch and the dual-mass flywheel are permanently connected and are balanced as a single unit. They can only be replaced in a set." In the first diagram, "1" is the M5/M6 clutch and "2" is the E92 M3 clutch. Also, the transmission has its own oil cooler, which the M5 does not.
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 Last edited by GregW / Oregon; 12-03-2007 at 09:04 PM.. |
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12-03-2007, 06:47 PM | #50 |
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Good stuff Greg. Where did you locate that info?
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12-03-2007, 06:47 PM | #51 |
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A bit OT
But here is an interesting FAQ on the DSG as implemented in the GTI. A very good preview of some of the features and possibly crippled features we can expect in the US.
http://www.turbofsi.com/DSG-FAQ.html |
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12-03-2007, 09:01 PM | #52 |
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Clutch info source
BMW Aftersales Training Information PDF. A great read if you haven't perused it: http://www.e90fanatics.com/pdf/BMW-M...nformation.pdf.
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12-03-2007, 09:53 PM | #53 | |
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12-04-2007, 07:08 AM | #54 | |
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12-04-2007, 09:38 AM | #55 | |
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12-04-2007, 10:19 AM | #57 |
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12-04-2007, 10:22 AM | #59 | |
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Anything more is surely distracting from the very purpose of these cars which is pure enjoyment. |
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12-04-2007, 03:14 PM | #60 |
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The US version's M-DCT will probably have launch control except it will be a tamed-down version for what rest-of-the-world M-DCT's will get. Kind of like how BMW has tamed-down the SMG3's launch control for the US vs RoW in the E60 M5 and E63/64 M6.
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12-04-2007, 06:15 PM | #61 | ||
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12-04-2007, 06:23 PM | #62 | |
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Personally I hope they add a lot MORE options under the iDrive menus. What I would like * Enable/Disable auto upshift at redline * Enable/Disable auto upshift on paddle hold (hold upshift paddle down for auto shift at redline) * Enable/Disable downshift queue * Enable/Disable shift speed depends on engine rpm * Enable/Disable smooth shift during lateral G load. * Enable/Disable throttle blip on downshift * Settable auto downshift RPM per gear * Seperate control for shift RPM in auto mode (from shift speed) |
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12-04-2007, 06:45 PM | #64 |
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12-05-2007, 12:41 AM | #65 | |
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I'm sure BMW is thinking about a lot of possibilities like these. But you'll have to realize the BMW is not designing the car for the 0.5% of folks like yourself (probably stating the obvious there...). I highly doubt we will get such thorough/detailed control. Maybe more things like this might be explicit in M-DCT generation II or III. They will certainly offer some features in M-DCT that won't be in regular non M DCT (which there will be plenty of, soon). I do think a bit of what you want will essentially be there. The smooth shift during lateral g loads should be a default (but doubtful). Maybe even the aggresive shift modes will still be smooth enough to really not need this. I think we'll get auto upshift at redline maybe in both auto and manual modes in one or more of the more aggressive settings. I also think we may see shift speed depends on engine rpm. Why would you want no blip on downshift? It is certainly great for lowering transmission wear as well as the more obvious benefits. |
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12-05-2007, 03:11 AM | #66 | |
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The blip on downshift on the current E46 only happens durring very agressive driving or on throttle downshifts. What I want to see is an option to always blip on downshift even if you are just slowing down off throttle or on the brakes. However, doing that all the time probably draws more attention than you really want. |
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