[McLuVan]

When you get an lsd...what happens to the DSC?
do you have to turn it off every time you start your car?

[veightkiller]

curious

[enrita]

The sensors are the one of the ABS than has nothing to do with LSD? they will still check the speed of the wheels.

[Sparky66]

Originally Posted by McLuVan

When you get an lsd...what happens to the DSC?
do you have to turn it off every time you start your car?

Absolutely nothing changes with all the nanny aids on. Basically, it feels just like factory, although you will notice the DSC light is not activated no where near as much as before under hard acceleration. Turning on DTC will help the car act like it has a very limited version of an LSD but will prevent accelleration and brake the car accordingly to make adjustments to slides.

The advantage of a real and proper LSD is only fully realised once you turn off DSC/DTC, which will disable all the nanny aids.

- Since Straight line hard accelleration will not be impeded or slowed down by any interaction of the nanny aids, the car tends to have greater straight line accelleration without feeling like it's being held back and will have improved stability without the dreaded drift of a single wheeler diff......overall faster but a lot safer.

-High Speed turn in into a corner will transfer weight and engine power to the outside wheel and induce less understeer as the car rotates more into the corner.
As a note:
Car manufacturers build in and setup cars to Understeer as an early warning safety system that you are losing grip, to force the average driver to brake early / reduce speed and make increased steering adjustments to enable turn in at a corner which may have been taken at too high a speed.
-Corner exit speed can be taken at higher speed with an LSD, due to more grip without picking up the inside wheel or getting single wheel wheelspin as is the case with open wheel diff arrangements. So basically you can step on the gas a lot quicker for higher exit speed out of a corner.

Best of both worlds with LSD,

DSC on = cruising around and effortless automatic error correction control in the wet. Car gives you early warning of a slide and will adjust speed (slower) and correct angle to prevent slide.

DSC off = for experienced drivers for fast high speed predictable handling and grip for all out accelleration. Car will not automatically take over and adjust slide. Combination input of throttle, steering and braking will need to be provided by the driver to correct situation.

[Mr. 5]

The simpler way of thinking about it is:

Without LSD: 1 wheels slips then DSC gets activated.
With LSD: 1 Wheel starts to slip, other wheel grips, both wheels slip then DSC gets activated.

I added an LSD in my GLI and every body was curious about traction control.
Now traction control gets activated after both wheels brake loose.

[JoeyFiasco]

informative, thanks fellas

[cliverman]

Originally Posted by Mr. 5

The simpler way of thinking about it is:

Without LSD: 1 wheels slips then DSC gets activated.
With LSD: 1 Wheel starts to slip, other wheel grips, both wheels slip then DSC gets activated.

I added an LSD in my GLI and every body was curious about traction control.
Now traction control gets activated after both wheels brake loose.

Nice explanation.

[Ghost170]

If you have LSD, you still have to turn off DSC to fully use the LSD. Just like what you have to do for the M cars. On my e36 M3 I dissabled the DSC.

[WOPALX]

Originally Posted by Mr. 5

The simpler way of thinking about it is:

Without LSD: 1 wheels slips then DSC gets activated.
With LSD: 1 Wheel starts to slip, other wheel grips, both wheels slip then DSC gets activated.

I added an LSD in my GLI and every body was curious about traction control.
Now traction control gets activated after both wheels brake loose.

To illustrate what the LSD allows you to do, and to explore the limits of your car (either with or without LSD) it's best to spend some time at a race track or skid pan.

I am off to the skid pan today at a local race track, some of the BM's coming are;

1 x E90 with LSD
1 x 135 with LSD
1 x E92 stock diff
? 1 x 135 with stock diff

I did a similar day before my LSD was installed so will be good to see the changes it makes.

I have my video camera so will take some video and post it when I have finished editing it.

[McLuVan]

oh that makes sense
so basically just turn off DTC/DSC every time you start the car
so hold down the DTC button for 3 or was it 5 seconds
I forgot

[Mr. 5]

Originally Posted by McLuVan

oh that makes sense
so basically just turn off DTC/DSC every time you start the car
so hold down the DTC button for 3 or was it 5 seconds
I forgot

Isn't this a standard practice already for everyone?
You mean to tell me that I am the only one?

What's mentioned above is as routine for me as putting on my seat belt.

[midlife]

Originally Posted by Mr. 5

Isn't this a standard practice already for everyone?
You mean to tell me that I am the only one?

What's mentioned above is as routine for me as putting on my seat belt.

i just had my quaife LSD installed in my 335 today... and i am picking up the car tomorrow !

i race an e36 with LSD at the circuit track, so i am guessing my 335 handling dynamics should now behave similar to my e36.

question:
i believe i will be disabling BOTH DTC nannies for everyday normal driving.
BUT when it is raining out, would pressing the DTC button just once be a good idea??

thanks

[zsapphire7]

keep in mind different LSDs behave differently. A quaife ATB lsd i think has the ability to transfer 80% tq to the wheel with greater grip while clutch lsd theoretical is 50/50. (correct me if im wrong ) Your 335i may behave slightly differently than a clutch based lsd at the limits (probably more oversteer).

[Mr. 5]

Originally Posted by midlife

i just had my quaife LSD installed in my 335 today... and i am picking up the car tomorrow !

i race an e36 with LSD at the circuit track, so i am guessing my 335 handling dynamics should now behave similar to my e36.

question:
i believe i will be disabling BOTH DTC nannies for everyday normal driving.
BUT when it is raining out, would pressing the DTC button just once be a good idea??

thanks

Congrats on the LSD!
I would say to leave complete traction control on during the rain unless you want to have some drifting fun (be careful).

[midlife]

Originally Posted by Mr. 5

Congrats on the LSD!
I would say to leave complete traction control on during the rain unless you want to have some drifting fun (be careful).

thanks,

one last thing guys:
i have a 1/4 mile race coming up in my 6AT 335 against a 135 6 MT.
with my new LSD, from a dig, is this what i should do ?:
1/ all nannies off
2/ power brake at approx what RPM ??

comments please. of course, i will try a few test luanches with the new LSD, but i really do not luanch too much cause i do not like to beat on this car (i have an e36 to do that with).

my mods are JB3 low boost (high altitude map), UR catless dps, UR cai, FMIC, forge DV, LSD on yokohama advan sport tires.

thanks

[McLuVan]

Originally Posted by Mr. 5

Isn't this a standard practice already for everyone?
You mean to tell me that I am the only one?

What's mentioned above is as routine for me as putting on my seat belt.

I did it once in my old 335i
scared the crap out of me

you got some balls

[midlife]

Originally Posted by McLuVan

I did it once in my old 335i
scared the crap out of me

you got some balls

WOW,
seriously, is this really a warning ??

[McLuVan]

Originally Posted by midlife

WOW,
seriously, is this really a warning ??

well it was raining

and I'm a noob driver
it was like my first time out in the rain

[BuLoOoSki]

have traction control completely off and power break to the highest RPM u can. (im assuming you're gonna have drag radials on) If you dont have drag radials on Id say break boost to 1800-1900rpm just so that you dont spin a lot. You can pratice launching and see which one works best for you. for me with street tires i launch at 1900rpm and with drag radials 2200rpm

Originally Posted by midlife

thanks,

one last thing guys:
i have a 1/4 mile race coming up in my 6AT 335 against a 135 6 MT.
with my new LSD, from a dig, is this what i should do ?:
1/ all nannies off
2/ power brake at approx what RPM ??

comments please. of course, i will try a few test luanches with the new LSD, but i really do not luanch too much cause i do not like to beat on this car (i have an e36 to do that with).

my mods are JB3 low boost (high altitude map), UR catless dps, UR cai, FMIC, forge DV, LSD on yokohama advan sport tires.

thanks

[midlife]

Originally Posted by BuLoOoSki

have traction control completely off and power break to the highest RPM u can. (im assuming you're gonna have drag radials on) If you dont have drag radials on Id say break boost to 1800-1900rpm just so that you dont spin a lot. You can pratice launching and see which one works best for you. for me with street tires i launch at 1900rpm and with drag radials 2200rpm

thanks, btw did you have an LSD??

got the car back today - damn - it was raining.
maybe it was all in my mind, but even driving for only about 20 minutes in the rain, the car definitely felt slightly different with the LSD.

i just i just have to wait for dry roads and no traffic to see exactly what i gained.
btw, bought my quaife lsd from harold at HP autowerkes - he was just incredible with customer service.

[midlife]

Originally Posted by zsapphire7

keep in mind different LSDs behave differently. A quaife ATB lsd i think has the ability to transfer 80% tq to the wheel with greater grip while clutch lsd theoretical is 50/50. (correct me if im wrong ) Your 335i may behave slightly differently than a clutch based lsd at the limits (probably more oversteer).

thanks for the warning.

granted, we all hate understeer thru a fast corner.
but oversteer can really get hairy sometimes

[midlife]

Originally Posted by McLuVan

well it was raining

and I'm a noob driver
it was like my first time out in the rain

a newbie driver with a 335 in the rain - be careful dude.

i am a very experienced driver with quite a few track days under my belt.
i highly suggest you keep your nannies on during the rain - most especially if you are tuned.

my 2 cents