11-13-2018, 10:32 AM | #1 |
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DCT question: automatic DCT upshift when you keep bouncing off the rev limiter ?
Hi guys,
I am about to pull the trigger and from my M2 testdrives, i have come to accept the fact that the 6mt in the M2 is just not at the level of Miata, S2000, Civic type R, etc. The flywheel is way too heavy, shifter is clunky, and makes the car feel heavier than it is. So, i am leaning towards getting a DCT. In manual mode, will the dct up shift automatically if you keep bouncing off the rev limiter? I would like full control of the gears and i would like the dct to not shift even if i keep bouncing off the limiter. Thanks in advance! |
11-13-2018, 10:34 AM | #2 | |
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McGary911472.00 |
11-13-2018, 12:28 PM | #3 |
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As Anthony said, in manual mode, with DCT, you're completely on your own, other then one situation... (that I know of)
If you push petal to the floor, and then downshift, the car will find the lowest acceptable gear, and shift into that gear. Say you're in 5th, and you floor it and downshift... car will find which gear it can downshift into and still stay below red line, and put the car into that gear instantly, for instant pick-up. |
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11-13-2018, 12:46 PM | #4 | |
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The reason for this is how DCT gearboxes work. They are basically two manual gearboxes in one. One for the odd gears and one for the even gears. The car predicts what gear you will most likely want next and pre-engages it in the idle gearbox. So say you're in 2nd and you have your foot on the gas, the car will engage 3rd gear in the idle box because that's the one you're mostly likely to choose next (because you're foot is on the gas). But say you take your foot off the gas or stop on the brake, the car will engage 1st gear in the idle gearbox because it assumes you want to downshift based on the action of braking or letting off the gas. That's how DCT gearboxes achieve fast gear changes. I'm unaware of a way to precalculate that you want to dropdown multiple gears, so it still has to manually engage the gear you want instead of having it pre-loaded based on your actions. So, in this circumstance, it will engage the gear at the same speed that a normal transmission will. |
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cptobvious2531.50 |
11-14-2018, 12:35 AM | #5 | |
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11-14-2018, 01:43 AM | #6 | ||
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11-14-2018, 09:50 AM | #7 |
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No, holding it doesn't. But in automatic mode it will drop down a bunch of gears when you floor it in a high gear. I believe it keeps the same gear if you do it in manual mode. But that's nothing revolutionary. My 2007 Saab 93 does the same thing.
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11-14-2018, 12:33 PM | #8 |
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IMO the manual transmission while not up to Porsche standards is still amongst the best available today. A properly working Civic Type R transmission is great but only if you have a good one as plenty are very notchy going into 2nd gear and plenty suffer from grinding and lockout in the higher gears. There’s also nothing wrong with the flywheel as the rev-hang is programmed in for emissions like most new cars using manual transmissions in this day and age. In regards to the S2000 and Miata it’s easy to make a slick manual transmission when it only has to be built to handle the torque of an economy car engine.
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Fear-Mongrel1184.00 cptobvious2531.50 |
11-14-2018, 01:07 PM | #9 | |
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11-28-2018, 12:17 AM | #10 | |
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While i do like the 6mt in the m2, im coming from an s2000 and a miata, which are the pinnacle of manual transmission benchmarking. I felt the 6mt in the m2 actually made the car feel heavier and more disconnected. I got the dct and it's the best transmission ive ever owned so far. How it bangs into the gears during aggressive upshift is the best thing ive ever felt. Feels like a supercar. I'm sure the 6mt is great for most folks tho and regardless of the transmission this car is AWESOME!!! |
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11-28-2018, 07:52 AM | #11 | |
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Drives: 2018 M2 AW DCT
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