DSC coding settings for 135is

[paranoidroid]

Originally Posted by ApexResistance

Back on point... To the OP, I would imagine that if the ability to code the friction coefficients for the DSC on the M cars is possible, given that the Non-M cars show the same codes, I would assume that you could modify the DSC friction coefficient the same way. Though I don't know if the values are the same as the M cars, since the M cars come with a limited slip differential. You could play with it, but I don't think you'd get the same results the M guys do. Give it a try, and let us know how is goes.

Thanks for bringing this back on topic.

The issue with messing around with the friction coefficients without some reference is the other M cars have different suspension & tire setup. The 135is is the same as the normal 135i but came from factory allowing for more slip in both DSC & DTC modes. I just want the nannies to be a bit more permissive while still having them enabled. This is why if we can get the DSC Module coding values from a 135is car we could safely lower the limits a bit but still be in tune with the stock suspension..

[paranoidroid]

Originally Posted by MightyMouseTech

I doubt there is a difference. The 135i and 135is are built the same in Germany. The only diff is the PPK and PE being added stateside. Only thing I could see is that the PPK software MIGHT make a change.

There is a difference between 135i & 135is. This came straight from the BMW 135is press release on the differences from the 135i:

"BMW’s Dynamic Stability Control (DSC) also includes a Dynamic Traction Control (DTC) function that provides electronic intervention to prevent loss of vehicle control, but at a higher threshold before activation. This allows the driver to experience more spirited driving on dry roads and offers more flexibility when driving in more challenging conditions such as in snow. In addition to its duties as a safety system, the DSC system on the 135is is programmed specifically to enhance performance-oriented driving."

So yea, we need the values from a 135is and we can copy the settings for those who want a more permissive DSC/DTC on our 135i.

[Bimmer-Bob]

Originally Posted by paranoidroid

Thanks for bringing this back on topic.

The issue with messing around with the friction coefficients without some reference is the other M cars have different suspension & tire setup. The 135is is the same as the normal 135i but came from factory allowing for more slip in both DSC & DTC modes. I just want the nannies to be a bit more permissive while still having them enabled. This is why if we can get the DSC Module coding values from a 135is car we could safely lower the limits a bit but still be in tune with the stock suspension..

What's your source for saying that the "is" DSC parameters are different? As MightyMouseTech stated, the "is" is essentially a port-installed US-only accessory package. Perhaps the PPK coding alters the stock DSC parameters (as he said) but do you have any other info definitively stating the settings are different?

[MightyMouseTech]

Originally Posted by paranoidroid

There is a difference between 135i & 135is. This came straight from the BMW 135is press release:

"BMW’s Dynamic Stability Control (DSC) also includes a Dynamic Traction Control (DTC) function that provides electronic intervention to prevent loss of vehicle control, but at a higher threshold before activation. This allows the driver to experience more spirited driving on dry roads and offers more flexibility when driving in more challenging conditions such as in snow. In addition to its duties as a safety system, the DSC system on the 135is is programmed specifically to enhance performance-oriented driving."

Ok, a press release, always take those with a grain of salt.

The "is" was not a different model in Germany, it was a made up model by BMW USA. My Canadian 135i "M Sport Edition" was built exactly the same as the "is" at the factory. You can not even tell them apart by VIN number, exact same VO codes. The only difference, was the port added PPK, PE and a couple badges for the US cars.

I would very much like it if there was a way to make it less intrusive, just don't think the "is" is any different.

[Bimmer-Bob]

Originally Posted by paranoidroid

There is a difference between 135i & 135is. This came straight from the BMW 135is press release on the differences from the 135i:

"BMW’s Dynamic Stability Control (DSC) also includes a Dynamic Traction Control (DTC) function that provides electronic intervention to prevent loss of vehicle control, but at a higher threshold before activation. This allows the driver to experience more spirited driving on dry roads and offers more flexibility when driving in more challenging conditions such as in snow. In addition to its duties as a safety system, the DSC system on the 135is is programmed specifically to enhance performance-oriented driving."

So yea, we need the values from a 135is and we can copy the settings for those who want a more permissive DSC/DTC on our 135i.

Ah, beat me to it!

Interesting though, because this seems to be officially endorsing DTC (again, one press of the button) as some sort of "Sport Mode" rather than just a solution for low-traction conditions (which makes sense, since it should allow for greater slip angle). I'm not sure it definitively states that the 135is DSC is actually different though - kinda sounds like marketing twisting words. But yeah, it would be interesting to see a .trc file from an "is" DSC module as compared to a regular 135i or 128i.

[Esteban]

Originally Posted by paranoidroid

There is a difference between 135i & 135is. This came straight from the BMW 135is press release on the differences from the 135i:

"BMW’s Dynamic Stability Control (DSC) also includes a Dynamic Traction Control (DTC) function that provides electronic intervention to prevent loss of vehicle control, but at a higher threshold before activation. This allows the driver to experience more spirited driving on dry roads and offers more flexibility when driving in more challenging conditions such as in snow. In addition to its duties as a safety system, the DSC system on the 135is is programmed specifically to enhance performance-oriented driving."

So yea, we need the values from a 135is and we can copy the settings for those who want a more permissive DSC/DTC on our 135i.

I remember reading that as well and wondering exactly what that meant. That announcement also talks about the 135is suspension and differential as if they are different from the standard 135i. Pretty sure they're not.

"The 135is is equipped with sport suspension incorporating an aluminum double-pivot front suspension and a five-link fully independent rear suspension in lightweight steel."

"The differential in the 135is comes from a new generation of final drives optimized for running smoothness and fuel efficiency. Featuring double-helical ball bearings, the differential runs at an even lower operating temperature reached more quickly than before thanks to the reduction of fluid required in the differential. Electronic rear brake management is used to simulate a differential lock for stronger acceleration in turns and low-traction conditions."

http://www.1addicts.com/forums/showthread.php?t=691753

[Esteban]

Originally Posted by MightyMouseTech

I doubt there is a difference. The 135i and 135is are built the same in Germany. The only diff is the PPK and PE being added stateside. Only thing I could see is that the PPK software MIGHT make a change.

That would be nice, but I doubt it too.

[paranoidroid]

You guys might be right and maybe the 135is would be coded the same and it's marketing spiel. It'd be interesting to see how the 135i in Europe is coded, since I know the M cars in DSC changing MDYNAMIC_MODE_USA from true to false for USA vehicles allow for more permissive DSC. The USA models are much more intrusive. We also have these settings in the 135i DSC module so it'll be interesting to those who want to test spirited driving with less intrusive DSC but still maintain some of the safeties to play with these variables..

A theory a few mentioned is that DTC is really just the same as the marketed 'M Dynamic Mode' for M cars.. so with some tweaking we can have our own 'M Dynamic Mode' that allows for much more spirited driving while maintain some safeties..

[paranoidroid]

Originally Posted by MightyMouseTech

Ok, a press release, always take those with a grain of salt.

The "is" was not a different model in Germany, it was a made up model by BMW USA. My Canadian 135i "M Sport Edition" was built exactly the same as the "is" at the factory. You can not even tell them apart by VIN number, exact same VO codes. The only difference, was the port added PPK, PE and a couple badges for the US cars.

I would very much like it if there was a way to make it less intrusive, just don't think the "is" is any different.

Point taken and good info. If you want to play with the vars to make it less intrusive read this info:

http://www.m3post.com/forums/showthread.php?t=688943

and

http://www.m3post.com/forums/showthread.php?t=956396

Our 135i have the exact same variables to be coded..

[simp15d]

Fubar_M3, I would help if I could, I have a 135i 2013 M Sports. I bought all the cables, loaded all, Inpa, Dr. Wateva, ISTA+, NCSexp, NCS Dummy, FInd ECU, etc.. USB update my Maps but what's this FSC.. at the end, it can't find my ECU.!!! not sure what's next. All I wanted is to detect any codes etc.. and maybe a little coding.
If you solve my problem I will solve yours.. deal

[simp15d]

Could someone help me, if the car has DCS, DCT do I use the diff oil with LSD? or not?

[chris_flies]

Originally Posted by simp15d

Could someone help me, if the car has DCS, DCT do I use the diff oil with LSD? or not?

None of these cars came from the factory with an LSD (except the 1M). The DSC computer (Dynamic Stability Control) controls the brakes to sorta route power to the wheel with traction, acting like an LSD, but it just can't come close. The DSC computer has 3 operating modes; On (kills fun as soon as it happens), DTC (allows more wheel spin, but no sideways-ness), and DSC (everything is off, don't die).

Your DCT (Double-Clutch Transmission) needs BMW DCT fluid (whatever that may be).

Terminology is everything...

[Esteban]

The fluid used in the DCT is Pentosin FFL-4 (DCTF-1) fluid. I believe it takes 5 liters.

[simp15d]

thanks for that peeps.

[cjb762]

Originally Posted by paranoidroid

I read somewhere BMW programmed the 135is DSC to be less intrusive than the standard 135i. I think this is something 135i owners can code in, we just need the right values.

Can someone with a 135is and the ability to read coding values do a dump of DSC module settings and post the FSW_PSW?

Of particular interest are the limit settings for oversteer & understeer (UEBERSTEUERN_MUE_1_2, UNTERSTEUERSCHWELLE_2, etc).

A thread with more info specific to E90/E92 M3: http://www.m3post.com/forums/showthread.php?t=956396

I'm not sure if you ever got your answer, but here is the pull from my 135is...