What about Limited Slip Differentials?

[ppDoc]

Originally Posted by 335ito135i

Don't forget you can't do donuts on concrete without one!!!! VIP

donuts = waste

[BMWeber]

Originally Posted by Advevo

What will happen with youre brake pads when you join a driftday with the ediff.

I am still not convinced and if you can not change to a LSD because of the Ediff than i am not buying a 135i

I'll almost guarantee and I'm counting on tuners having software upgrades to disable the E-diff

[ppDoc]

Originally Posted by BMWeber

I'll almost guarantee and I'm counting on tuners having software upgrades to disable the E-diff

then u'd have NO diff. hmm what's the benefit of that. software updates also voids ur warranty, unless you plan on doing this after 4 years.

[atr_hugo]

The issue they're trying to solve is the interaction between an aftermarket LSD and the vestigial E-LSD software.

[1ster]

Originally Posted by atr_hugo

The issue they're trying to solve is the interaction between an aftermarket LSD and the vestigial E-LSD software.

It seems like if you could just turn the e-diff setting to "off" you'd solve the problem, but there's no way it will be that easy. The ABS, DCS, and e-diff are likely way too entangled. It'll take some serious software engineering to sort it out.

[atr_hugo]

Originally Posted by 1ster

It seems like if you could just turn the e-diff setting to "off" you'd solve the problem, but there's no way it will be that easy. The ABS, DCS, and e-diff are likely way too entangled. It'll take some serious software engineering to sort it out.

What he said!! I suspect that there's some initial Siemens VDO code with some individual modules written for BMW on top of the base code. The issue would be, is the E-LSD (E-DIFF) a standalone component that calls the ABS code to brake the spinning wheel or is that code tangled up in the ABS code (spaghetti code ; -).

[BimmerBoi2100]

I don't think this vehicle needs LSD. Why would anyone spend a couple hundred to a couple thousand on something like LSD? Just to improve you lap time by a few tenths of a second. Not money well spent in my opinion. Maybe if you raced your car for money if, I could see buying LSD. How many times would you race your car? Enough times to justify an LSD purchase? I seriously doubt it. Not sure if any of you guys realize that performance parts for Bimmers a pretty expensive, so prepare yourseves to purchase an LSD for a pretty penny.

[mikeo]

Those of us that have spent in lot of time in LSD BMWs, both street and track, know exactly why we want a real LSD and are prepared to pony up for one. It's that simple.

[BMWeber]

Originally Posted by mikeo

Those of us that have spend in lot of time in LSD BMWs, both street and track, know exactly why we want a real LSD and are prepared to pony up for one. It's that simple.

agreed and I do enough track days the cost would most likely be offset by the large amount of rear brakes(pads and rotors) I will destroy with the E-diff. certain tight tracks like the road course at NHIS a car with a LSD vs a car without is seconds faster not tenths. Not to mention the premature tire failure from the inside tire spinning all the time. an LSD is worth every penny

[inTgr8r]

Originally Posted by mikeo

Those of us that have spend in lot of time in LSD BMWs, both street and track, know exactly why we want a real LSD and are prepared to pony up for one. It's that simple.

^ WHS....

[ChrisK]

IMHO:

Since the 335i doesn't get one, I doubt the 1 Series will either.

[ducati]

Originally Posted by BimmerBoi2100

I don't think this vehicle needs LSD. Why would anyone spend a couple hundred to a couple thousand on something like LSD? Just to improve you lap time by a few tenths of a second. Not money well spent in my opinion. Maybe if you raced your car for money if, I could see buying LSD. How many times would you race your car? Enough times to justify an LSD purchase? I seriously doubt it. Not sure if any of you guys realize that performance parts for Bimmers a pretty expensive, so prepare yourseves to purchase an LSD for a pretty penny.

Let's see--do you ever turn your car? I bet you do. Do you know what an apex is? Probably.

OK, so when adding throttle at the apex to drive out of the corner... ANY CORNER, not necessarily a racetrack... And your car had 300 lb-ft of torque trying to make it through an OPEN differential and 235mm tires... You will have wheelspin. Excessive, uncrontrollable wheelspin, which leads to excessive and difficult to control oversteer.

Try it in a 335, see what I mean.

If you don't ever come across that situation, well, then you 'aint driving hard enough :thumbup:

Of course, you could complete the turn and only add throttle once you've straightened... But then you might as well have a Buick.

[R32]

Originally Posted by chriskurn

IMHO: Since the 335i doesn't get one, I doubt the 1 Series will either.

i'm sure you're right. aftermarket solutions will be expensive, too.

Originally Posted by 1ster

It seems like if you could just turn the e-diff setting to "off" you'd solve the problem, but there's no way it will be that easy. The ABS, DCS, and e-diff are likely way too entangled. It'll take some serious software engineering to sort it out.

is the e-diff different from the 335i? you can already get a quaife lsd for the 335i, and it doesn't seem to run afoul of those electronic nannies.

[BimmerBoi2100]

I'll leave the drag racing to you guys. It's just comical to me that folks want to drag race this thing. Also, why bitch about something you know you ain't getting? Seems asinine to me.

Why not build a car for that purpose? Would be cheaper than spending 35k on the car, then another 700-4000 on an LSD. The thought of spending up to more than 40k on a premium small car to drag race make me cringe. Not money well spent....

I bet you guys' insurance is through the roof!

[atr_hugo]

Drag racing? Whose talking about drag racing besides you? IIRC, 'ducati' was describing track-in, hitting the apex and applying throttle on track-out. Steer towards track-in, leave the fricking steering wheel alone and point the nose with the throttle from there to track-out. As soon as you start to remove steering angle (just past the apex of the turn), throttle is squeezed on. Those are descriptions of road racing - not drag racing. If you want to go drag racing you'll want a 'locker' not an LSD.

Why are you posting on something you know nothing about?

[ducati]

Originally Posted by BimmerBoi2100

I'll leave the drag racing to you guys. It's just comical to me that folks want to drag race this thing.

OK, I take that back. You don't know what an apex is.

[grant]

Anyone who thinks the 135i doesn't need a real LSD shouldn't be buying a BMW :-)

[BimmerBoi2100]

I do know about it. But why not build a car for that purpose that all I'm saying. If I wanted to ROAD race I wouldn't buy a 1 series. I'd rather take me a Nissan 240sx or something, gut it, and build it the way I want it. I bet I wouldn't spend 45k. LOL use a car you wouldn't mind f*cking up....

[321]

Originally Posted by BimmerBoi2100

I do know about it. But why not build a car for that purpose that all I'm saying. If I wanted to ROAD race I wouldn't buy a 1 series. I'd rather take me a Nissan 240sx or something, gut it, and build it the way I want it. I bet I wouldn't spend 45k. LOL use a car you wouldn't mind f*cking up....

some cars are just meant to be driven....

[atr_hugo]

Ah, a picture may help illustrate what we're talking about. Here's why you'd want an LSD in a BMW:

[BimmerBoi2100]

LOL is that track in America?

[ChrisK]

I know I am going to get killed for this...



I agree this car is screaming to get tracked. However...before we start with "Anyone who thinks the 135i doesn't need a real LSD shouldn't be buying a BMW" statements.

Let's get a review of the car! LOL