[Neutrino45]

Originally Posted by carve

Most cars on the road don't have traction control, but they also don't have the power of a 335i, and aren't as safe as a 335i- safety contributed to by DSC & DTC. There is no reason to turn these all off on public roads.

I've been watching a lot of car reviews on Youtube for the past year and almost all new cars come with traction control as standard. Even inexpensive cars.

[dtc100]

Originally Posted by eunos33

Is this normal behavior? I tried spinning the wheels with DTC Off and it feels like the rear wheels jump (like skipping rocks on water) Instead of just spinning the wheels and getting tire smoke.

Almost sounds like the ABS had kicked in.

[techlogik]

Originally Posted by dtc100

Almost sounds like the ABS had kicked in.

What? There is no way ABS should work unless the wheels are at impending lockup while the brakes are pushed, and they won't cause wheel hop.

Wheel hop is a result of the toe changing while the wheel is slipping during hard acceleration, then regaining traction as the toe goes back to its normal position, this happens repeatedly. Hence it "hops". Bushings that aren't rigid enough are a the primary cause of wheel hop.

[dtc100]

Originally Posted by techlogik

What? There is no way ABS should work unless the wheels are at impending lockup while the brakes are pushed, and they won't cause wheel hop.

Wheel hop is a result of the toe changing while the wheel is slipping during hard acceleration, then regaining traction as the toe goes back to its normal position, this happens repeatedly. Hence it "hops". Bushings that aren't rigid enough are a the primary cause of wheel hop.

Well what do I know? I just thought he had described something similar to the many times when my ABS kicked in

I thought it is difficult to smoke the tires on a BMW because of the balanced weight. The Mustang I had years back would smoke every time, I am older now.

[E46toE90]

Originally Posted by JhnR

OFF = new tires

=/ rear tires lasted me 3 months

i no longer turn it off lol

[Tag]

Just think of it like this. DTC is what you feel reduce power to your rear wheels when you get even the slightest of slipping. DSC is basically what will correct the car if it starts to lose control and is about to spin or swerve. It's ok to turn off DTC, you won't get that lag when taking off if you get a little bit of slipping. Turn off both and you're asking for trouble. I've seen far too many lose control and wreck their cars by doing this. Remember, our cars are putting down a lot of power and they are RWD so it doesn't take much to lose control.

[335TWNTURBO]

Originally Posted by WWONG

DSC probably can get you out of trouble in a hurry, but you have to realize more than half of the cars (some faster) in the streets drive around without any form of stability control, so it isn't as scary as you guys are trying to make it sound.

good point.....

[Amdahl]

Originally Posted by e93WhiteonRed

This is true - but keep in mind that almost all cars at our power level and above have some sort of limited slip differential - Eaton, Auburn, whatever - which makes them a TON more predictible when you lose traction - HUGE mistake on BMW's part if you ask me.

Have any of you lost traction at high speed on a straight away and felt your car jet to one side... thats because one wheel is slipping and the other wheel is pushing you into the wall....

My understanding is that it is impossible to turn off the 'e-diff.' The car will still brake a spinning wheel(until it decides the brakes might overheat). It just isn't doing it in response to stability or traction control issues.

[Hoog_23]

I saw an early Z3 stuffed into a jersey barrier early on a Sat morning this summer on a tight curve on the Hutchinson Parkway. No rain or anything. EMS had just gotten there. Poor guy was dead. I wondered if stability control would have saved him from spinning (he hit head on on the barrier on the inside of the turn).

[Kolyan2k]

Originally Posted by WWONG

DSC probably can get you out of trouble in a hurry, but you have to realize more than half of the cars (some faster) in the streets drive around without any form of stability control, so it isn't as scary as you guys are trying to make it sound.

if you dont do anything stupid then its pretty safe to drive with OFF...and if you know the limits of your car.

[Single-t]

If you can find a place to turn everything off and "exercise" the car then do it. And of course when I say find a place, that means somewhere somewhat isolated.
My first encounter was going full throtle into a 4-way intersection and making a hard left turn and getting 90 degrees sideways before I corrected and was on my way.

But I'll say one thing...IT WAS FUN!!!

[Ron1n]

The more I drive with it completely off, the more I believe that the car still intervenes to some extent, especially when tuned. My experiences are mixed, and I wish we had some hard data from BMW (what really happens in each stage, and I don't mean some sort of Marketing propaganda).

Originally Posted by Watwood

Only disadvantage is you're the only one in control, some call that an advantage. Seems like cruise control bitches if you try to turn it on whilst in this mode.

If by bitches, you mean it won't engage, you're right.

[mithiral67]

On my 03 and 05 330i's I turned it all the way off once on each and never did it again as I lost complete control of the car. On my 335, I recently turned if all the way off to give it a try again (dont ask me why) and I have been getting very predictable drifts in 1st and 2nd gear and having a lot of fun. Maybe I have been getting shit ass luckly.

Thanks for the thread, I probably going to stick with just one click from now on.

[Kolyan2k]

snow is the best time to try. much lower speeds will give you the same effect.

[dave4]

I know I'm bringing back an old thread, but can you turn off DSC & DTC while moving or you have to be at a complete stop?

[fazman]

Originally Posted by dave4

I know I'm bringing back an old thread, but can you turn off DSC & DTC while moving or you have to be at a complete stop?

It's electronic... so it can be done at anytime and at any speed. I recently tried the one button press on my FBO 335xi in the snow. I have to say it was fun to make the car slide a bit on a common turn i make... but i still think it's best to leave all the safety controls on (even in my XI).

I also have others driving my car so I don't want them to get into trouble with the car in the snow/rain.

[Meeni]

Originally Posted by eunos33

Is this normal behavior? I tried spinning the wheels with DTC Off and it feels like the rear wheels jump (like skipping rocks on water) Instead of just spinning the wheels and getting tire smoke.

This is normal behavior of traction control preventing overpower spin. It cuts the power abruptly to stop the spin so it feels like jumps because the axle is taking shocks.

Pressing once the button shuts down this nanny (DTC). Unclear why it still does it when you turn it off.

Pressing long shuts down this + it cuts the stability control program (DSC), except for ABS you have no assistance anymore. You can spin the car in all directions you want without the computer applying brakes at selected wheels to keep you straight.

I do not recommend cutting it under the rain, it is very easy to trigger DTC on wet surfaces. DSC only is already very permissive to have fun, if you need to shut it off because you feel it, maybe you are not driving safely on open roads.

[Jitevashaat]

Don't be like me. I didn't do any research on DSC, so I didn't realize how often it would save my ass during my daily driving. Decided to completely turn it off once after work ( a friend had told me about it). Even with a 3 lane road, I just wasn't prepared since I didn't realize how much it saved my ass continuously. Let's just say Im upgrading my whole suspension and have to replace a few air bags. LEARN BEFORE YOU DO. I'll be heading to the track when my car is done.

[fazman]

Originally Posted by Sal Collaziano

Since I got my 335i, whether from a roll or off the line, I turn off DTC entirely (by holding it for 3 seconds or so). What is the disadvantage to doing this? As I'm reading, I see people state that you shouldn't turn it off completely.. Would somebody mind explaining this to me?

I have no problems with turning off the DTC/DSC (long button press) on my '08 FBO 335xi in the dry/rain/snow. I've always driven high HP cars/turbo cars... haven't had an accident yet.

[BKBMW335I]

That's usually one of the first things I do is turn it all the way off unless it's raining outside or if the road is wet and slippery.

Other than that, I love all the power I have being put down on the pavement where it belongs.

[motoguy128]

Keep in mind that stability control has the unique ability to apply individual brakes to maintain control. Humans cannot do that very well.

In DTC mode, it seems to allow you some freedom to slide around and wheelspin, but catches it before it gets too sideways. This is the best mode for snow and ice. Regular traction control is too restrictive unless you drive like an old lady, then you'll never notice.

[tc535i]

Originally Posted by Kolyan2k

I remember I turned my dtc off for the first time in rain on my m3. I left room for error on the road and made sure no cars around.....I keep it on after that. The car did crazy 360.

On dry m3 was stable with dtc off, probably not the case with 335i.

A tuned 335 has way more tq than an m3, even more susceptible to breaking tires loose on sudden acceleration