Stabillity Control

M

mattp64

Member
After reading in a previous thread, that if you hit the DSC button, the computer let's go of the reigns a bit and allows the z4 to act as though it has an LSD, i'm wondering how this works?

Is it a similar system as on other cars (like the Merc C63 AMG) where stabillity control will apply the brakes to a rear wheel if it is slipping too much?
 
I'll start with the simple answer and let others build on it from there.

Fistly DSC is just a bunch of electronics and sensors so partially switching it off does not create any form of LSD. LSD usually requires a special diff gear set or clutch pack to allow one wheel to spin up to a certain amount faster than it's counterpart

As far as I'm aware there are 3 settings on DSC, normal, single press of the switch and press and hold while turning the ignition on

Normal is full nanny mode and using sensors calculates driver intention, wheel spin, change of direction and does all sorts of horrible but safe things like cutting engine power, applying brakes on correct wheel to prevent understeer, oversteer, etc. and helping the aged around the corner.

switching off merely reduces it's influence so letting you get the tail out a bit, not cutting the engine power, etc.

Fully off lets you be much more wild and allows wheels to spin, and more easy ditch entry, however I believe even in the fully 'off' mode it can still cut in when it says 'enough' and truly senses a crash
 
cj10jeeper said:
I'll start with the simple answer and let others build on it from there.

Fistly DSC is just a bunch of electronics and sensors so partially switching it off does not create any form of LSD. LSD usually requires a special diff gear set or clutch pack to allow one wheel to spin up to a certain amount faster than it's counterpart

As far as I'm aware there are 3 settings on DSC, normal, single press of the switch and press and hold while turning the ignition on

Normal is full nanny mode and using sensors calculates driver intention, wheel spin, change of direction and does all sorts of horrible but safe things like cutting engine power, applying brakes on correct wheel to prevent understeer, oversteer, etc. and helping the aged around the corner.

switching off merely reduces it's influence so letting you get the tail out a bit, not cutting the engine power, etc.

Fully off lets you be much more wild and allows wheels to spin, and more easy ditch entry, however I believe even in the fully 'off' mode it can still cut in when it says 'enough' and truly senses a crash
Click to expand...


IIRC you're right except the bit I've put in bold - it doesn't intervene if its fully off; you're on your own ....
 
This seems to have cleared it up, apart from what is Driving Dynamics Control that is engaged with the sport mode on?
 
mattp64 said:
This seems to have cleared it up, apart from what is Driving Dynamics Control that is engaged with the sport mode on?
Click to expand...
It's just the fancy/technical name for "sport button".
 
mattp64 said:
This seems to have cleared it up, apart from what is Driving Dynamics Control that is engaged with the sport mode on?
Click to expand...


IMO with sport mode on and also having all DTC/DSC options turned on (the normal mode for when you start the car) is that with the sport mode on, it is not as restrictive when it detects wheel spin. It will however still take control and slow you down, just IMO not as bad as with sport mode off.
 
Also with sport mode on it seems to let the back go out a bit whereas without sport mode off it doesnt seem to let it go out at all.....
 
I don't drive around with sport mode on very often, the throttle is too much like a hair trigger, and can confirm you can definately get the back out with this switched off.

J.
 
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