[heisenbergB58]

Hi everyone, Im sure its covered, and Ive been searching for about three days with no luck, so Ive come to ask, do all E90 335i have a braking diff? I know March 08 introduced a revised/updated e-diff, but what about before that? Im looking to buy a 335i 6 speed, and I prefer the car to lay down 2 tracks rather than one, perhaps the better question is, will a pre 3/08 335i still put down 2 marks? I will be throwing a lsd in there as time and budget permits. Just wondering how she will behave in the meantime, thanks!

[TheMidnightNarwhal]

Originally Posted by Heisenberg93

Hi everyone, Im sure its covered, and Ive been searching for about three days with no luck, so Ive come to ask, do all E90 335i have a braking diff? I know March 08 introduced a revised/updated e-diff, but what about before that? Im looking to buy a 335i 6 speed, and I prefer the car to lay down 2 tracks rather than one, perhaps the better question is, will a pre 3/08 335i still put down 2 marks? I will be throwing a lsd in there as time and budget permits. Just wondering how she will behave in the meantime, thanks!

It will still be open diff car without e diff.

But on the note, I keep doing launches and burnouts with 2 tracks and I have a 2011 335is so I dunno.

[SnapCoupe]

Originally Posted by Heisenberg93

Hi everyone, Im sure its covered, and Ive been searching for about three days with no luck, so Ive come to ask, do all E90 335i have a braking diff? I know March 08 introduced a revised/updated e-diff, but what about before that? Im looking to buy a 335i 6 speed, and I prefer the car to lay down 2 tracks rather than one, perhaps the better question is, will a pre 3/08 335i still put down 2 marks? I will be throwing a lsd in there as time and budget permits. Just wondering how she will behave in the meantime, thanks!

The E-diff "simulates" a LSD by applying the rear brakes individually to the spinning wheel via the DSC. While it is quite a bit better than having an open diff without the E-diff intervention, it is no where near the same as a traditional LSD. In low speed (1st or 2nd gear) slides with my Z4M, it was incredibly easy to control the direction of the car without over correcting. With my 335i, low speed slides take a lot more steering input, as the throttle input lacks precision due to the rear brakes intervening. Due to this, it makes sliding the 335i, even with the E-diff, more stressful than satisfying.

One thing you should look into is the different options for LSDs in the 335i. Certain models are much cheaper/easier to throw a LSD into than others. I know for my 2011 manual, a portion of the stock diff internals are welded, making it much more expensive parts and labor wise to put a LSD into it. I believe if my car was an auto or a pre-lci, it would be about a third of the price to install a LSD.

[heisenbergB58]

Originally Posted by SnapCoupe

The E-diff "simulates" a LSD by applying the rear brakes individually to the spinning wheel via the DSC. While it is quite a bit better than having an open diff without the E-diff intervention, it is no where near the same as a traditional LSD. In low speed (1st or 2nd gear) slides with my Z4M, it was incredibly easy to control the direction of the car without over correcting. With my 335i, low speed slides take a lot more steering input, as the throttle input lacks precision due to the rear brakes intervening. Due to this, it makes sliding the 335i, even with the E-diff, more stressful than satisfying.

One thing you should look into is the different options for LSDs in the 335i. Certain models are much cheaper/easier to throw a LSD into than others. I know for my 2011 manual, a portion of the stock diff internals are welded, making it much more expensive parts and labor wise to put a LSD into it. I believe if my car was an auto or a pre-lci, it would be about a third of the price to install a LSD.

I appreciate the explanation but you didn't really answer my question at all, as I already understand how the "Ediff" works. I was just wondering how E90 335i's built before 3/2008 behave compared to 335i's built after the updated diff system.

[heisenbergB58]

Originally Posted by TheMidnightNarwhal

It will still be open diff car without e diff.

But on the note, I keep doing launches and burnouts with 2 tracks and I have a 2011 335is so I dunno.

Thanks, but your car is built well after the 3/2008 cut off, so I'm a bit confused with your reply. I am asking about 335i's built before the update, and how their differential braking system will act compared to a post 3/2008 335i. Do they simply not have any form of differential braking?

[SnapCoupe]

Originally Posted by Heisenberg93

I appreciate the explanation but you didn't really answer my question at all, as I already understand how the "Ediff" works. I was just wondering how E90 335i's built before 3/2008 behave compared to 335i's built after the updated diff system.

It will behave worse than those without an E-diff, as it will be a traditional open diff without the rear brakes intervening in an attempt to gain more traction.

One wheel peel babyyyy.

[heisenbergB58]

Originally Posted by SnapCoupe

It will behave worse than those without an E-diff, as it will be a traditional open diff without the rear brakes intervening in an attempt to gain more traction.

One wheel peel babyyyy.

Sheeeeeeeeeeeeeeeeet, So basically pre March 2008 they suck noodles and have no diff braking at all? Well when did they start to weld stuff in there? My budget allows for 2008 and up, but not too far up, as Im not wanting to spend too much on another car atm

[SnapCoupe]

Originally Posted by Heisenberg93

Sheeeeeeeeeeeeeeeeet, So basically pre March 2008 they suck noodles and have no diff braking at all? Well when did they start to weld stuff in there? My budget allows for 2008 and up, but not too far up, as Im not wanting to spend too much on another car atm

I think it was just the N55 manual cars that had the welded diff pieces IIRC. It might be the LCI manual cars, but i'm not 100% sure.

[heisenbergB58]

Originally Posted by SnapCoupe

I think it was just the N55 manual cars that had the welded diff pieces IIRC. It might be the LCI manual cars, but i'm not 100% sure.

Well I guess I will soon find out, since Im after a manual car, maybe Ill order a lsd pre installed into the diff housing from quafi or however its spelled

[AWDBooSTIn90]

My 09/2006 built 2007 335i 6mt has E-Diff.

From what ive read and researched, the DSC pump was changed in 3/08 because of some early build cars (2005/6's in Europe) had issues and they made the DSC pump module quicker to allow for quicker response times between each wheel getting braking pressure, whether its E-Diff, ABS or just traction control.

Also BMW didnt start marketing the feature of rear brake modulation, as E-Diff until 3/08, but it was always there in some form.

My car will put down two strips of rubber launching with the stock open Diff, with really no problem. I can get some quick 0-60mph times..

However, i feel the same about "sliding/drifting" the car as one of the previous posters described. Wait till you get a real LSD and then you can have your drifting fun lol.

[heisenbergB58]

Hey everyone, just a quick update, I got my BMW this week! 2007 335i manual sedan, and on my way to the grocery store I decided to stop by my local "skid pad" to see how my rear would react... Dispite the fact that I have a very mild clutch slip under boost, this car murders tires with the traction all the way off, and it left two marks and a cloud of smoke. I went to test a couple donuts, and sure enough felt very similar to my manual LSD IS300, just a bit heavier, and a bit turboier. During straightline burnouts I can definitely notice the LSD effect is being caused by braking, but until a real LSD swap is in place, I can get with it, very impressive car for a pre 3/08 and open diff.

[BB_cuda]

A guy named Matt Whitbread does in house machining of welded diff and install of Wavetrac LSD. He has many happy customers. He got banned but I have contact info if you’re interested.

I had a Wavetrac done by HP Autosport and it works great. Harold frequents this forum.

[drunkenup]

If it didn't have the ediff coding it would be pretty obvious. My 330i does not and that car will spin one wheel and go nowhere all day. Trying to get the back to come around in anything less than thick snow requires you to really upset and throw the car around. Ediff 135i still dimwitted and slow but comes around with relative ease. Despite having almost twice the power it doesn't spin and stop accelerating at half throttle in the rain

[cvc 22349a]

Originally Posted by Heisenberg93

I appreciate the explanation but you didn't really answer my question at all, as I already understand how the "Ediff" works. I was just wondering how E90 335i's built before 3/2008 behave compared to 335i's built after the updated diff system.

Huh? All e90s have an open 'ediff'. Did the DSC software programming change 3/2008?

[heisenbergB58]

Originally Posted by BB_cuda

A guy named Matt Whitbread does in house machining of welded diff and install of Wavetrac LSD. He has many happy customers. He got banned but I have contact info if you’re interested.

I had a Wavetrac done by HP Autosport and it works great. Harold frequents this forum.

What did he get banned for? lol DM me I'm down for info

[heisenbergB58]

Originally Posted by drunkenup

If it didn't have the ediff coding it would be pretty obvious. My 330i does not and that car will spin one wheel and go nowhere all day. Trying to get the back to come around in anything less than thick snow requires you to really upset and throw the car around. Ediff 135i still dimwitted and slow but comes around with relative ease. Despite having almost twice the power it doesn't spin and stop accelerating at half throttle in the rain

I'm decently satisfied with it on my 335i, it will work until I can afford to get a real lsd going. Dropping the clutch and lighting up the back is still fun and gives me two marks lol