BimmerFest BMW Forum banner

1 - 20 of 33 Posts

·
Registered
Joined
·
2,150 Posts
Discussion Starter · #1 ·
Well, I've been driving my car like a stole it and was taking a 90 degree turn aggressively without the damn DSC off :mad:

So I take the turn, and as the rear begins to break loose, the Right rear wheel gets a little electronic braking that just jars the car.

Did I do anything bad to the wheel, suspension, anything?

Car seems to be driving normally, but just concerned. Could use the input and the comforting :( :bawling: :p
 

·
Adolescent On-Call
Joined
·
3,262 Posts
wheel-man said:
the Right rear wheel gets a little electronic braking that just jars the car.:( :bawling: :p
Jarring as in when the ABS kicks in? Kinda like da-da-da-da-da in the brakes? That would be normal, me thinketh. :dunno:
 

·
Registered
Joined
·
2,150 Posts
Discussion Starter · #6 ·
machmeter said:
Jarring as in when the ABS kicks in? Kinda like da-da-da-da-da in the brakes? That would be normal, me thinketh. :dunno:
Not like ABS... like standing on the brakes for the Right rear wheel only. It was weird and I was all paranoid afterwards.
 

·
Adolescent On-Call
Joined
·
3,262 Posts
Your car is probably fine. Anyway, it's designed to save your a$$ from sliding off the road :D so it apparently works. Better than having that beautiful CalTrans shrubbery coming through your side window :eeps:
 

·
Registered
Joined
·
2,150 Posts
Discussion Starter · #9 ·
bluskye said:
Its DSC doing it's job to correct your oversteer. There's nothing wrong, stop being paranoid.
You're right... but just because you think they're coming after you, doesn't mean that they aren't :eeps:

I am probably one of the more paranoid peeps on this forum when it comes to my car. I need a lift in the garage so I can check things out whenever I want.
 

·
Grinning from ear to ear
Joined
·
2,029 Posts
Here's what I'm thinking. Dynamic Brake Assist can apply the brakes to each wheel independently based on what it thinks your intended path is. Did you have DSC completely off (ie holding it down for 5 seconds), or just the first level off (ie tapping the button)?
 

·
Registered
Joined
·
2,150 Posts
Discussion Starter · #11 ·
icemanjs4 said:
Here's what I'm thinking. Dynamic Brake Assist can apply the brakes to each wheel independently based on what it thinks your intended path is. Did you have DSC completely off (ie holding it down for 5 seconds), or just the first level off (ie tapping the button)?
Unfortunately I had it on :eek: :(
 

·
Empowered Consumer
Joined
·
4,042 Posts
wheel-man said:
Unfortunately I had it on :eek: :(
Or, depending upon how skilled a driver you are, you're fortunate you had it on.

DSC did what it was supposed to, which is to act as a strict little electronic nanny. There's nothing wrong with your car.

Alex
 

·
:-)
Joined
·
2,262 Posts
when i was driving an x3 at one of those mini-autocross events and when the dsc kicked in, it scared the crap out of me. it felt like what you describe 'jarring' i felt like the car was breaking apart or something.
 

·
Ubergeek
Joined
·
15,646 Posts
You're fine. One of the first things I did after buying my was to "test" with DSC in a wet parking lot. Fun.
 

·
Registered
Joined
·
4,122 Posts
KrisL said:
You're fine. One of the first things I did after buying my was to "test" with DSC in a wet parking lot. Fun.
Fun AND educational. How many people have purchased a new car with ABS for the first time and, when ABS kicks in for the first time with the pedal feedback, have taken their foot OFF the brake, thinking they had some kind of brake failure? Plenty, methinks. :eek:
 

·
Ich bin ein Bimmerer
Joined
·
1,241 Posts
BahnBaum said:
Or, depending upon how skilled a driver you are, you're fortunate you had it on.

DSC did what it was supposed to, which is to act as a strict little electronic nanny. There's nothing wrong with your car.

Alex
:stupid: You should see how unmerciful the cars at the BMW Performance Center in Spartanburg get hammered by clubfooted bafoons on a regular basis. I don't think any more damage was done to your car than if, say, you lost traction due to surface while cornering, and suddenly one tire stuck and straightened you out a bit. Actually, likely less, since your brakes were doing the modulation: there wasn't an external traction or friction shock to the geometry, just a nice little slowing of one or two wheels to get you back in line.
 

·
Grinning from ear to ear
Joined
·
2,029 Posts
LMC said:
Fun AND educational. How many people have purchased a new car with ABS for the first time and, when ABS kicks in for the first time with the pedal feedback, have taken their foot OFF the brake, thinking they had some kind of brake failure? Plenty, methinks. :eek:
Duh, that's what testdriving cars is for :) Seriously though - that's how I got over my ABS phobia - by testing out the brakes on other cars. Now it doesn't bother me at all other than feeling a bit weird.

Hey is it legal to go to an open parking lot with no cars and start doing doughnuts and the like in order to learn your car's limits? I'm not talking about doing stupid stuff, but I want to know what my car can and can't do in a safer environment than on the road. But the cops out here are merciless. Can you get pulled over for this?

And no- I'm not a street racer, or some punk kid - I just want to get to know my car better. Thanks
 

·
Ubergeek
Joined
·
15,646 Posts
icemanjs4 said:
And no- I'm not a street racer, or some punk kid - I just want to get to know my car better. Thanks
Good question...

Can I recommend BMWCCA car control clinics and autocrosses? :)
 

·
I do'nt make mistakes.
Joined
·
10,478 Posts
BahnBaum said:
Or, depending upon how skilled a driver you are, you're fortunate you had it on.

DSC did what it was supposed to, which is to act as a strict little electronic nanny. There's nothing wrong with your car.

Alex
I'm all for leaving the DSC on until you truely become a skilled driver.

Today at driving school at Road America, a guy I meet this week (parked next to him) was taking his wife around the track during the morning track touring (50mph limit). He turned his DSC on his M5 off during staging, and then before we left, it started to rain. Well, lap one, he entered the second slowest turn, that has a lot of tar patches. He spun a complete 360 (and thankfully stayed on the track).

Same spot with me a little later (before I heard his story), I hit the same spot at a similar speed and my rear end twitched over may 10 degrees before DSC saved it and I drove on thinking it that wasn't so bad.
 

·
Rest in peace, Coach
Joined
·
9,106 Posts
wheel-man said:
Well, I've been driving my car like a stole it and was taking a 90 degree turn aggressively without the damn DSC off :mad:

So I take the turn, and as the rear begins to break loose, the Right rear wheel gets a little electronic braking that just jars the car.

Did I do anything bad to the wheel, suspension, anything?

Car seems to be driving normally, but just concerned. Could use the input and the comforting :( :bawling: :p
This is probably going to offend you, but if you take my advice to heart it will save your life later. Really.

Go take a car control clinic or a high performance driving school before you "experiment" on the street with your skills. Situation like you described where dynamic brakes are kicking in to save your life, may not be correctable via DSC or dynamic brakes the next time. There's only so much in car electronics can do to buffer you from the forces of physics.

Once you have taken a car control clinic you will know exactly what you need to do to prevent an oversteer situation, and once you have taken a few high performance driving schools you will understand that driving aggressively and snapping the steering wheel around a corner is NOT the fast way around the corner. You need to turn in smoothly and hit the gas on the apex and track out.

That being said, it doesn't sound right that the brakes applying is harsh enough to be "jarring". I've experienced DSC and dynamic brakes kicking in at the limit of adhesion (oh, about 120+ mph on the banking ovals of California Speedway) and it feels more like a pulsing sensation in your brake pedal, with what can best described as light "thumps" you hear from the the ABS control unit rapidly engaging/disengaging the brakes. If the brakes are applied hard enough by dynamic brakes to jar the car, it may upset the weight balance enough were you tank-slap around and spin the otherway out of control. I have yet to experience DSC kick in hard enough were I can feel it outside of the flashing lights on the dash and very slight, seat of the pants feel when it kicks in.

EDIT: My apologies if you have had a few schools already. Judging from your post I have to assume that you have not had proper driver's training.
 
1 - 20 of 33 Posts
Top