01-04-2017, 05:22 AM | #1 |
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Handbrake turns vs DCT
Does anyone know if it's ok to use handbrake in turns (ie car moving at some speed) on DCT-equipped cars? Basically question is about driving on snow/ice and drifting when using a handbrake is sometimes a useful trick.
I tried researching it and found some mentions that it is actually ok (as if the DCT would disengage the clutch whenever handbrake is used) like here (http://www.1addicts.com/forums/showthread.php?t=565999) and here (http://f80.bimmerpost.com/forums/sho....php?t=1004274) but the answers were not really substantiated and most of discussions about handrbake vs DCT are about parking and not the proper use of it anyway And I don't want to screw up my DCT doing smth like that of course! If the engine keeps revving and transmission is engaged (to the rear wheels), then blocking your rear wheels with a handbrake could be quite a shock unless one fully steps off the throttle etc. Seems like I am not the only one wondering about that so any insight would be very useful. |
01-04-2017, 06:21 AM | #2 |
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Why exactly would you want to do this? For drifting on ice?
Regardless, it shouldn't be a problem to use the handbrake, but you definitely will not have as fine control over it as you would a 6MT. |
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01-04-2017, 06:36 AM | #4 | |
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Yes, basically for drifting on ice. I am going through an ice driving course now (a generic one, not by BMW) and while using throttle is perfectly enough for drifting, using a handbrake is just another way and actually a rather controllable one (I used to have an FWD car where it was pretty much the only way to get the car drifting). Also I can see that there's an ice rally technique called "Scandinavian flick" which also involves handbraking in a turn. Regarding your MT comment, could be true, I've heard references from my instructor that DCT felt slightly more detached compared with MT to them but anyway I've got the DCT (which i like a lot) and wonder if it's safe for it to be used with a handbrake in a turn. |
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01-04-2017, 12:50 PM | #5 | |
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Mike
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01-04-2017, 12:52 PM | #6 | ||
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01-04-2017, 01:17 PM | #7 | |
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01-04-2017, 02:08 PM | #8 | |
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01-04-2017, 02:41 PM | #9 |
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Not sure about the M2 specifically, but any setups I've seen that are similar (quite common on Japanese cars), just have the drum machined into the hat as you mentioned and would have thought the aftermarket kits would be the same.
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01-04-2017, 03:29 PM | #10 |
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Now I'm very curious I'll start another thread... Thanks!
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01-04-2017, 05:09 PM | #11 |
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I found these parts listed on Autohausaz.com
parking brake actuator and parking brake pad set. I could not find any thing about a separate hub with pads! Now I will have to go by the dealer to learn more! Mike Sounds like I'll eventually need some "special tool" to DIY brakes DAM IT!
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01-04-2017, 06:07 PM | #12 |
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Take a look here:
http://www.realoem.com/bmw/enUS/show...diagId=34_2208 It shows that the parking brakes are very small mechanical drum brakes. Having seen this system in person and having worked on it on my E90 I can tell you it is not remotely set up for drifting work. It's designed for what it is normally used for, use if for drifting and you will screw that system up. I don't know about the DCT but I suspect the rear diff won't be happy if you start doing handbrake turns, on the ice will reduce these factors a bit but I wouldn't do with the stock system. |
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01-04-2017, 06:15 PM | #13 |
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So it is the same for the manual as well as DCT. I kind of thought that this car with an actual hand brake leaver (unlike most newer cars with electrically actuated parking brake) was designed to do that kind of "sports driving?"
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01-04-2017, 10:23 PM | #14 | |
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BTW, even when the pros teach you drifting at M School they don't instruct the use of the handbrake, they instruct the use of the gas pedal which. |
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01-05-2017, 03:03 AM | #17 |
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Thanks for all the views guys. To me the original issue is more or less settled: irrespective of what DCT does when handbrake is engaged (and I'd still be worried regarding that as seems like no clear idea on DCT behavior here), the brake itself is not really designed for heavy use (and it will be heavy if applied to a spinning wheel even if I step off the throttle) so should be avoided.
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01-05-2017, 04:07 AM | #18 | ||
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01-05-2017, 11:50 AM | #19 |
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You can also use the E-brake to limit wheel spin on ice and snow...this is old school and now the car's electronics does this. The rear brake pads do much less work in stopping the car than the fronts in routine function, usually I change the front pads Two to One vs the rears. So using the Rear E-brake for occasional spin control is fine. And by the way it's an E-brake, not just a parking brake. If your hydraulics fail you have a backup that is DESIGNED to stop your car from a speed....
Mike
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01-05-2017, 02:38 PM | #20 | |||
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01-06-2017, 06:10 AM | #21 |
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I went out and tested a handbrake turn in the snow. Works great with my DCT. As soon as I pull the handbrake lever the DCT disengages the clutch. And when I release the handbrake the DCT engages the clutch.
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01-06-2017, 08:10 AM | #22 |
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Very interesting. Maybe a stupid question but how did you notice the clutch disengagement?
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