01-04-2024, 02:14 AM | #1 |
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dumB question regarding 6MT shifting
So just today I tried shifting gears with accelerator still depressed but not actively accelerating the car.
My thinking; thought the car auto blips up and down right? So far so good, no deleterious effects and possible better milage? Is this something anyone else does, is it safe or should I back off power before engaging a gear like a normal MT is usually driven?! |
01-04-2024, 05:16 PM | #3 |
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Ok not super helpful.
Why do we lift off in the first place, to be mechanically sympathetic to the clutch as new speeds are met. But the car is doing this better and faster than any of us can. So if driving at a steady state/speed, do I/we actually need to ease off the accelerator or not? Like I said no juddering is occuring indicative of a shift done poorly and loading up the clutch. Last edited by 3t3p; 01-05-2024 at 04:35 AM.. |
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01-04-2024, 05:50 PM | #4 |
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^Sounds like you have it figured out^
I’d love to be in the car when you turn off all the nannies and forget that the car no longer does it for you. |
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01-05-2024, 04:34 AM | #6 |
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How will I accidentally turn off all the nannies?! Oops I held the TC button for five seconds while driving to work. Sure.
I can manually downshift blip or code it off with MHD but I like what the car does and downshifting everywhere gets old sometimes. So still no good answer. |
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01-05-2024, 04:58 AM | #7 |
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I never said ‘accidentally’. Things become habitual/muscle memory, otherwise it’s YOUR car and YOUR transmission, drive it how YOU want to. It sounds like you’re either trolling or looking for confirmation on incorrect technique, which I very much doubt you’ll find here.
My thinking; you should have bought a DCT. |
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01-05-2024, 10:16 AM | #8 |
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Clutch is not the problem it’ll be your synchros later on.
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01-05-2024, 05:22 PM | #9 |
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This was my thought, but i don’t understand why it wouldnt be noticeable?
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01-05-2024, 06:04 PM | #10 |
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I used to have no lift shift on another car/ different platform. I loved it and accidentally tried it with my new to me m2. Nope, not a good idea. I’d just leave well enough alone and shift normally to avoid future repairs, but it’s your car and you should drive it as you see fit. As David1 replied, I think you’d probably end up having synchro issues.
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01-06-2024, 12:24 PM | #12 |
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This is not correct. The car only blips the throttle up. It's not possible to blip it down. If the engine speed is too high for the next gear, it'll be the clutch that slows it down to match the transmission speed when it's engaged.
Someone correct me if I'm wrong but I'm not really sure that the synchos will be notably affected. Once the clutch is pressed, it doesn't really matter what the engine speed is. The input shaft is now driven by the wheels until the shift selects the next gear where the input shaft is slowed by the synchros for the higher gear (since it sounds like OP is talking about upshifting). Sychros are doing the same job while the clutch is pressed whether the engine is dropping to 2000 rpms, staying at 3000 rpms of being revved up to 7000 rpms. its the re-engagement of the clutch that forces the engine to match the transmission speed |
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01-09-2024, 04:15 PM | #13 |
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There is no auto blip on upshifts. The engine needs to slow down before engaging a higher gear to match engine speed with input shaft speed--the opposite of downshift throttle "blips". There's no way to force this, you need to wait for RPM to fall, which is why rev hang on the 1-2 shift is annoying. You can engage the clutch earlier, when engine and input shaft speed don't match, and it's not going to buck the car like it does when you don't rev match a downshift, but it's not as smooth and not good for the clutch.
Not sure why you think you'd get better mileage by not lifting between shifts. |
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