Hi All,

Wondering how ASC-T will effect performance during spirited driving? Will there be a noticible effect on straight line 0-60 time? Improved performance in the corners? Better traction from a standing start?

Would there be any beifits to driving with it turned off? If not, why is the capability to turn it on / off there?

Thanka!

 

In the manual it references driving in snow with chains, or 'rocking' a car if it's stuck as reasons to turn off ASC.

ASC will only activate when the speed of the wheels are different - i.e. if you lose traction. Some people find it inhibits their driving - especially if you're on a slippery service, i.e. gravel.

 

0-60 times will be affected with ASC+T if you spin your tires on launch. It cuts engine power, thinking you've lost traction on your front wheels.

It's not difficult to turn ASC+T off on launch.

 

or when your tires spinning when you drop clutch!

 

Are we talking DSC?

It's fairly common knowledge that DSC limits 'off the line' power, to prevent you from even coming near breaking traction.

 

Actually I chirp the wheels/spin the tires all of the time with DSC on - it tries to function after that. It helps prevent spin after you are driving, but even then (going up hills etc) the grip loss still happens and the DSC works to apply individual wheel braking, engine mgmt, etc to gain grip. In cars with ASC when driving and losing traction it has felt more like the gas and engine just totally cut out more abruptly. I can't say how the ASC is from a stop and how it differs in response under those circumstances.

To the poster here's a neat link on how DSC/ASC work that might be interesting to you - you can turn it off for max launches:
http://www.bmwworld.com/technology/dsc.htm

 

I've chriped the wheels with DSC as well... But doing so usually shuts down power to the powerplant. That's not what I'm meaning.


I'm meaning, the amount of gas/clutch producing x # of horsepower to reach 30mph from a stop, is < y # of horsepower produced when DSC is on.


The difference is significantly noticeable when quickly accelerating from a stop with DSC on, than when toggling it to off.

And whats the difference between ASC and DSC?

 

Oh okay, I thought that when you said "to prevent you from even coming near breaking traction" you were saying that you couldnt chirp the tires or spin the wheels at all.

Click the link in my post above for the differences between ASC & DSC :smile:

 

thanks for the responses! the links above pretty much explained things for me. To tell the truth I was really asking because ocassionally my 2005 MC ocasionally loses all power above 3k RPM in 1st. The revs go up but it doesn't translate to any noticible power. Thought the ASC-T might be messing with something. I'll post in the 'under the bonnet' forum to see if it's a common problem!

 

Possibly the known 3K RPM flat-spot in torque??

 

Possibly. I notice the usual dead spot between 3 and 4 k on the MC. Most of the time things pick back up after getting the engine speed up above 4k. But once in a while, nada. I can get the revs up to 6.5k and there's nothing more than the power 3k usually puts out.

 

The DSC operates differently on cars equiped with the factory LSD. Durring tire spinning acceleration the DSC does not kick in and cut engine power, It lets the LSD try and control wheel spin. The DSC will cut power if one of the front wheels is spinning a lot faster than the other.

I have not done any tire sizzling burnouts in my MINI, but when shifting into second gear at redline both my front tires spin without the DSC light flashing.