DSC

[moranor@axis]

is there a way to re program the DSC? i want to turn it down or if possible i want to control the way it works

what would be best is if i can stop it from cutting power and just get it to work by braking one of the rear wheels...
if this is done the car should behave almost like it has an LSD

 

[zaleonardz]

This does make me slightly nervous, I must admit

Also keep in mind that your DSC and ABS controllers are very much interlinked, so if you are going to fiddle, dont get it wrong.

But very interesting take on it

 

[Hellas]

Weld the dif together and add a switch on the rear brake lines to use either the left or the right side.

 

[moranor@axis]

i was reading up on the z4 today and it seems the new z4 does not have an lsd at 1st i was :bawling: but then after reading up on it it seems that what it does is use the brakes to brake the wheel that is spinning this if i have it right will send all the power to the other wheel so in essence what it has is an E-diff i remember reading that the DSC 1st cuts the engine then if necessary applies the brakes so im thinking if i some how cut the engine control then the brakes should work how i want them to

---

Welding the diff will make it a horrible drive most days 'fiddle brakes' will work but if i can get this DSC thing right it would be perfect

 

[applehero]

It sounds like you need dual stage traction control... :thumb:

 

[moranor@axis]

anyone know much about how advanced the EBC was on the e46? or how i can go about disconnecting the engine controll?

 

[netercol]

is there a way to re program the DSC? i want to turn it down or if possible i want to control the way it works

what would be best is if i can stop it from cutting power and just get it to work by braking one of the rear wheels...
if this is done the car should behave almost like it has an LSD

i hate to say it, but i doubt whether this is reasonably possible.. you would not believe the amount of calibration that has gone into DSC, just watch the DSC in action with INPA while driving, its crazy.. on top of that nobody to my knowledge has ever gone to the trouble of cracking the programming on the DSC/ABS/ZKE modules, so making changes in software is going to be close to impossible.

thinking about it, your best approach would prolly be to fool the wheel sensors into thinking the wheel is spinning, so the DSC will slow it down.. but how to implement this in a way that will not kill you is another story.. :thinking:

 

[rick540]

The description of what you want to do describes the functions of ASC as opposed to DSC.

Why on earth would you want to modify this life saving system?

Just switch it off when you want to play.

 

[Truvalu]

The description of what you want to do describes the functions of ASC as opposed to DSC.

Why on earth would you want to modify this life saving system?

Just switch it off when you want to play.

There is also the half-on / half-off feature....

 

[moranor@axis]

how do i turn it half off? thought there was only on and off

I want to make it behave like it has an lsd just tuning DSC off will not do that...

thinking some more about this now i think some sort of piggy back system would be better because i need to make sure id does not brake both the back wheels at the same time while the engine is revving high dont think this would have good results so i need to make it so it only ever brakes one wheel at a time...

 

[Sankekur]

As far as I now it doesn't brake both wheels at once but each wheel depending how much is needed.

By pressing the DSC button you turn it half off (the DSC light will be on), if you then press and hold it you will turn it off completely with only ABS still working (DSC light on and handbrake light on in orange/yellow). Or unplug the connector to the DSC system and that will turn off everything including ABS

 

[andrewbuch]

Only the face lift E46's had the DSC with half on/off function as far as I know.

My pre face has a ASC button, its either on or off.

If there is a DSC button, then Sankekur's process is correct

Just do what Clutchplate has done in his 540iM, disconnect the DSC unit fully therefore you have no traction control, No ABS, No Speedo.. ie, INSANE

 

[moranor@axis]

well on my car it says DSC on the button so im guessing some pre F/L had DSC

i like my ABS so ill keep that...

do you know what exacty half off means? (no cutting engine but still uses back brakes?)

 

[andrewbuch]

Maybe its cause my little car is only a 318i so did not need DSC

I dont know what exactly each mode does

 

[Sankekur]

as far as i know the half off only means less of everything, so where full on would catch the tail for instance as fast as possible, the half on/off will let is slide a bit before trying to catch it to prevent you from losing it completely, fully off the DSC sits with its arms folded and watches you make a complete hash of everything.

 

[moranor@axis]

well roads are wet today so ill go play in the parking lot and see im hoping it wont cut the power

 

[andrewbuch]

lucky you, we need some rain up here its so dry.. & I also wanna go & play

 

[Sankekur]

Yeah I noticed a parking lot close to where I live that is completely empty at night and well lit (this is of course good and bad ) So when it rains again, might pay it a visit, so to speak

 

[andrewbuch]

Remember Guys, Video evidence or it did not happen

 

[moranor@axis]

"IIRC, in the first stage the engine will no longer cut power if it senses slip (but ABS will still activate to prevent slippage at the rear wheel that's slipping to try to transfer the power to the non-slipping wheel). In the second stage (with 'brake' illuminated), ABS won't kick in to spoil the fun, either.

Having driven only RWD cars y whole life, I found the engine cut feature to be both annoying and unsafe when driving my 330Ci because it was just so unnatural/unexpected. Wheel spin I can handle, but a sudden cut in power is just weird.

DSC would intervene frequently in my 330Ci; I'm glad it doesn't intervene so much in the M3.

--SONET "

interesting