01-11-2018, 07:46 PM | #1 |
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DCT rev hang after flooring it
Just wondering if anyone has a technique or a DCT setting that helps with this (minor) annoyance.
When flooring the car from a stop, the car takes off and gets me to 60 in 4 seconds. OK, now I'm done accelerating, as I can't really bring it up to 150 mph on local roads. I let off the gas and the car stays in 2nd gear at 5000 rpm or whatever and won't shift to third, or fourth, or fifth as it thinks I must be on a racetrack and I'm getting ready to brake hard for the next corner. I've owned my F80 for a little less than a year. My preferred method at this point is to use the paddles as soon as I'm done accelerating and manually shift to third and then fourth, and then hit an M button on my steering wheel to put it back in automatic. Is this the best (or only) method? I don't usually start threads, but this is a hard one to google. Thanks.
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01-11-2018, 08:57 PM | #2 |
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I believe that is how the car/engine was made. After a hard acceleration on the throttle, the car will hold the high rams and lower gear because it wants to keep the power rev there in case you want to accelerate faster. You can just manually upshift to a higher gear if you want to go to lower RPMs.
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01-11-2018, 09:57 PM | #3 |
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Solution: Drive it in S-mode
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01-12-2018, 03:56 AM | #4 |
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Ease back on the throttle and then it will continue to upshift normally.
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01-12-2018, 04:06 AM | #5 |
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So your not even using launch mode?? Or have full traction off im assuming?? DCT doesn't shift at the right times for me so never let off after 2nd but if you use launch control it will shift automatically so maybe before third you can put back into D mode to continue cruising??
Just gotta try different ways to get it as smooth as you like but in sports+ and flooring it just wants to stay with high boost on I suppose lol. Maybe try sport and transmission 2 on D drive, its quick and smooth for street thrills.
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01-12-2018, 06:38 AM | #6 |
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Thats how virtually all automatic transmissions behave, perhaps the dct holds the gear a little bit longer. It is anticipating that you want to go fast thus keeping you in a lower gear.
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01-12-2018, 02:45 PM | #10 |
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Yes, this is "normal" behavior for the car, and I do the same thing the OP does which is grabbing a paddle to manually upshift, but I'd like to disagree with the folks who say this is perfectly reasonable and the car thinks you are in "race" mode. IMHO that's pretty crappy electronic logic at this stage of the development of DCTs. What part of letting off the gas COMPLETELY for over a second or two and NOT getting on the brakes is the CPU interpreting as "I want to still drive aggressively"? Seems to me that this sort of driving is sending the message that "I'm done accelerating and I'd like to resume normal service now, please". This is especially true when in standard/default/efficiency throttle mode. I might be able to understand the DCTs logic of holding the gear in Sport or SportPLus modes, but it makes no sense at all in the default mode.
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01-12-2018, 03:21 PM | #11 | |
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01-12-2018, 03:22 PM | #12 |
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D1 / D2, these are DCT settings, not throttle settings? Sorry, I could probably RTFM for this...
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01-12-2018, 03:31 PM | #13 | |
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Never really noticed it unless I was sport plus+ D3 + max throttle driving aggressively. So use a lesser setting, or just switch to paddles and upshift yourself if it bugs you. Not a big deal, and totally normal. Last edited by IDBGOD; 01-12-2018 at 03:37 PM.. |
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01-12-2018, 03:49 PM | #14 | |
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01-12-2018, 03:50 PM | #15 |
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Had the same issue Stock as well as tuned. Brought it up to attention of CaryTheLabelGuy when he was fine tuning my vehicle. He identified it as an Over aggressive throttle plate. He was able to fix it for me with an update on my tune. Haven't had the issue since.
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01-12-2018, 04:42 PM | #16 |
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Just keep using the flappy paddles.
Computer won't know you just wanted WOT for a few seconds. It's more annoying when it upshifts under braking into a corner, so programmers made the correct choice in my opinion |
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01-12-2018, 07:21 PM | #17 |
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It's a wonder bmw drivers have a reputation for being clowns. Floors it from a standstill to 60 and complains the transmission is not omnipotent enough to know it is time to stop driving like an @ss-hat
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01-12-2018, 09:45 PM | #18 | |
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Since you don't like driving fast, I guess you fall into the BMW stereotype of a badge whore, or did you just buy one because you're a prick?
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01-12-2018, 11:41 PM | #19 | ||
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