328 High Speed Cornering

[legendeer]

Hi Guys,Wanted 2 seek sum opinion on my ride's cornering abilities. Basic 328, lowered 40mm, bilstein shocks M3 Sports springs with adjustable camber kit. Some of you may recall i wanted to turbocharge the baby, but i'm now learning the car, getting to know her better before the major mods.I am not a stranger to corners, but i am not very familiar with rear-wheelers. Couple of weeks back, was tackling a beautiful corner, everything was going well, till "ASC failure" blinked several times on the display, and i almost got into serious trouble. Car spun-out, pusing-pusing macam gasing and came to rest beside kerb. Was a late night, deserted road. Can anyone please elaborate on ASC? Any help is much appreciated. Thanks guys.

 

[june_yap]

Can share what is your speed at that corner and which road and is it dry?
tyre size, type

 

[turbology]

In normal circumstances:
FWD car understeer when you reach corner limit.
RWD oversteer when you reach corner limit.
I am sure you already know that.

ACS : http://www.bmw.com/com/en/insights/...ype=index&article=automatic_stability_control

With ACS on, computer can only do so much. You can't defy the law of physics, and solely depend of ACS functions.
If you reach the limit of ACS, where ACS no longer able to correct errors for you, you will eventually spun out of control.

ACS help during a "unexpected event". If you going for corner attack, is better you turn the ACS off. (unless you have adjustable Stability control like in others car )
A warning: with ACS off, car react different. You need to relearn what you know about the car.

 

[climenta]

For UDMs, go for a good set of after market ARBs front & back. Feel the difference before going for after market shocks. Step by step upgrades will let you understand its limitations better.

 

[ALBundy]

Hi Guys,

Wanted 2 seek sum opinion on my ride's cornering abilities. Basic 328, lowered 40mm, bilstein shocks M3 Sports springs with adjustable camber kit. Some of you may recall i wanted to turbocharge the baby, but i'm now learning the car, getting to know her better before the major mods.

I am not a stranger to corners, but i am not very familiar with rear-wheelers. Couple of weeks back, was tackling a beautiful corner, everything was going well, till "ASC failure" blinked several times on the display, and i almost got into serious trouble. Car spun-out, pusing-pusing macam gasing and came to rest beside kerb. Was a late night, deserted road.

Can anyone please elaborate on ASC? Any help is much appreciated. Thanks guys.

On the E36, it only has ASC. Basically once the sensors detect that you are losing traction of the car (in this case I believe understeer), it will cut off power supply. On the later generation (ASC+Traction), there will be some braking ability to help the driver regain control of the vehicle.

The latest iteration of this technology is DSC plus.

My advice is for you to learn more about driving and how to counter situations like this in a proper driving school.

Cheers

 

[legendeer]

In normal circumstances:
FWD car understeer when you reach corner limit.
RWD oversteer when you reach corner limit.
I am sure you already know that.

ACS : http://www.bmw.com/com/en/insights/...ype=index&article=automatic_stability_control

With ACS on, computer can only do so much. You can't defy the law of physics, and solely depend of ACS functions.
If you reach the limit of ACS, where ACS no longer able to correct errors for you, you will eventually spun out of control.

ACS help during a "unexpected event". If you going for corner attack, is better you turn the ACS off. (unless you have adjustable Stability control like in others car )
A warning: with ACS off, car react different. You need to relearn what you know about the car.

Turbology, you nailed it. Exactly what happened at the corner...car was fighting me. Should have turned ASC off...duh. Wat a dumbass mistake.

On the E36, it only has ASC. Basically once the sensors detect that you are losing traction of the car (in this case I believe understeer), it will cut off power supply. On the later generation (ASC+Traction), there will be some braking ability to help the driver regain control of the vehicle.

The latest iteration of this technology is DSC plus.

My advice is for you to learn more about driving and how to counter situations like this in a proper driving school.

Cheers

Al Bundy, appreciate the input, i understand the direction you're coming from, but i've been doing this for quite a long time (don't assume there hasn't been training), and yes granted, it's my mistake that i didn't fully familiarize myself with the electronics.


At the corner apex - limit, my ride gave up fighting me and just decided it wouldn't do what i wanted anymore, and it's Oversteer, not Understeer. Understeer isn't a major issue, the car just takes a much wider trajectory, while oversteer makes you turn right into the corner, which is what happened.

Looks like it's back to the track with asc OFF for me!@ - Gotta "re-learn" the vehicle like turbology said. Rear-wheelers seem to be "happy-tail", gotta learn to tame the tail. Have a feeling it's not gonna be a walk in the park though.

Many thanks for confirming the ASC issue for me dudes.

 

[ALBundy]

Hi legendeer,

It all depends on what you did on entry and also at the apex. A lot of problems arised due to the entry speed, and what was initially an understeer situation turned into an oversteer situation and that is when you start fighting the car (fish-tailing).

As for the ASC being turn off or on, I don't think it will have much effect. Traction control is more like a safety net.

Cheers

 

[legendeer]

Hi Bundy,

Many thanks for the reply. I have a feeling u might have got it right with regards to understeer turning into oversteer. A beautiful corner turned ugly in a milisecond.

Looks like i have to test the asc out for myself...will post feedback in a week. There's a few drift circuits near my place in JB, will post results when i'm back.

Thanks again.

 

[turbology]

Looks like i have to test the asc out for myself...will post feedback in a week. There's a few drift circuits near my place in JB, will post results when i'm back.

Would love to join but I don't stay in JB.
In autocross event in US, you get penalize for turning ASC or ABS off.
They claimed you can achieve faster track time without ASC or ABS...

At highspeed corner with ACS off, you might not get any faster (maybe I little faster exit speed, since you allow to throttle off earlier with ACS off). But the respone will be more manageable, and predictable with ACS off. If oversteer too strong, you should change some settings : wider rear, ARBs, tires pressure, toe/chamber settings... etc. Share your result with us.

Wear a helmet. Good luck and be safe.

 

[legendeer]

"Would love to join but I don't stay in JB.
In autocross event in US, you get penalize for turning ASC or ABS off.
They claimed you can achieve faster track time without ASC or ABS..."- Turbology


That's interesting to know turbology, will keep you guys in the loop, no worries. I don't live there either, but will be going for a family visit. Trying to fit it into my schedule. I'm pretty sure the results will be surprising.

 

[legendeer]

Okay guys, i can officially say ASC off makes a totally different machine. Did track, and genting 4 trips, 2 with asc on, 2 with asc off, on 4 separate occasions.

Can confirm asc off is quite scary. Car fishtails like mad, and u gotta stay on ur toes, but the advantage is, u will know how it slides, and when u counter, the car responds. With ASC on, u will get oversteer, and if oversteer is too hard, u will get in trouble if try to counter.

 

[JOKER]

no matter what corner, uphill, downhill, dry, wet, ... just make sure your tire was in good condition;pressure and there was no sharp nail or pot HOLESs on the road :heeeelllllooooo:

and no traffic stuck half-way....

cornering also depend on the rear Differential, get the LSD version...

 

[turbology]

like he didn't know this

 

[legendeer]

Lol, nvm, appreciate the comments anyway. LSD ah...wait i buy new car la bro.