[bimmer456]

I don't have the LSD so can't speak to how much better it improves cornering, but I have the P-Zero run flats which do pretty well even in the rain. I normally run in sport+ but in the rain I do have to use sport, but that still give me plenty of performance and the tires grip well in this mode to take corners in a confidence inspiring manner. I imagine an LSD would help with a rear drive car at the limit when the drive wheels slip, though.

[the dope steez]

Originally Posted by Aberle

Putting all the various opinions together in a way that works within the context of where I live I´ve opted to go for the LSD. I might have an opportunity to import it in July.

Regular non-flat tires sound like a solid choice in terms of handling, but unfortunately the safety conditions around here are pretty bad (average 26 murders daily), so run-flats are very attractive from this point of view. Other than that, the ones I currently have still have a lot of life left in them. Once they get worn out, the logical step will be to upgrade to better run flats.

Sounds like the combination of both these changes should produce the desired results or close to it.-

I've got nothing to add except you're a brave man driving such a nice unit in Guatemala! I just got back from a work trip there and the roads are bruuuutal (where I was at least). No wonder there's a pinchazo shop every 2 miles.

No experience with the murder rate but I hear that's quite bad as well!

[theMpower]

I have Quaife LSD 3.08 on my M240i, with the electronic differential disabled.
Tested it in both ways (LSD with eLSD ON and OFF) and I prefer it with eLSD OFF.
Everything is smoother and the traction control only comes on when necessary.

[NISFAN]

Originally Posted by theMpower

I have Quaife LSD 3.08 on my M240i, with the electronic differential disabled.
Tested it in both ways (LSD with eLSD ON and OFF) and I prefer it with eLSD OFF.
Everything is smoother and the traction control only comes on when necessary.

6MT?

[bimmer456]

Do you have 18s or 19s on your 340, I have the 19s with the p zero run flats they are pretty good. Not sure if you're tracking the vehicle haven't noticed much understeer with that setup

[Aberle]

Originally Posted by bimmer456

Do you have 18s or 19s on your 340, I have the 19s with the p zero run flats they are pretty good. Not sure if you're tracking the vehicle haven't noticed much understeer with that setup

I have the 19´s with the stock Bridgestones S001´s RFT´s for which I've heard a whole range of contradicting opinions. Anywhere from them being good to them being total crap. However, I can see how having better tires would make a difference.

So I'm thinking that when they wear out I´ll upgrade.

[theMpower]

Originally Posted by NISFAN

6MT?

No, ZF8.
It's possible to install a 3.08 instead of the 2.81, I had to adjust it electronically, but no problem. The car gains vitality and is incredible.

[3ToAgree]

Originally Posted by Aberle

I have the 19´s with the stock Bridgestones S001´s RFT´s for which I've heard a whole range of contradicting opinions. Anywhere from them being good to them being total crap. However, I can see how having better tires would make a difference.

So I'm thinking that when they wear out I´ll upgrade.

Was so happy to get rid of my Bridgestone RFT's.... Here's a pic of new tires on 19"...

[eluded]

Originally Posted by 3ToAgree

Was so happy to get rid of my Bridgestone RFT's.... Here's a pic of new tires on 19"...

Nice, I am still waiting for mine to wear out.

[NISFAN]

Originally Posted by theMpower

No, ZF8.
It's possible to install a 3.08 instead of the 2.81, I had to adjust it electronically, but no problem. The car gains vitality and is incredible.

I have been thinking about this as a viable upgrade. 3.08. But wasn't sure what electronic 'issues' it would bring up......if any. Speedo still ok? Traction control issues? Etc?

[3ToAgree]

When i had my M Performance LSD installed, the dealer had to do coding with the install. How does an aftermarket LSD deal with this?

[bimmer456]

Originally Posted by 3ToAgree

When i had my M Performance LSD installed, the dealer had to do coding with the install. How does an aftermarket LSD deal with this?

I haven't seen any aftermarket LSD and would stay away from those. Coding is needed to calibrate the traction control so it works properly with the LSD and lets it do its job.

[3ToAgree]

Originally Posted by bimmer456

I haven't seen any aftermarket LSD and would stay away from those. Coding is needed to calibrate the traction control so it works properly with the LSD and lets it do its job.

Yeah, that's why i had asked the question as someone in the thread mentioned they installed a Quaife LSD so not sure how that integrates with the coding question and points you raised above.

[theMpower]

Originally Posted by NISFAN

I have been thinking about this as a viable upgrade. 3.08. But wasn't sure what electronic 'issues' it would bring up......if any. Speedo still ok? Traction control issues? Etc?

If you install 3.08 without adjusting, the car enters limp mode frequently (propulsion).
After making the adjustment everything works well again. Speedo ok, DSC ok, no limp mode or power cut.

Sorry for my English, but I think you understand me.

[oceanview]

Originally Posted by bimmer456

I haven't seen any aftermarket LSD and would stay away from those. Coding is needed to calibrate the traction control so it works properly with the LSD and lets it do its job.

Originally Posted by 3ToAgree

Yeah, that's why i had asked the question as someone in the thread mentioned they installed a Quaife LSD so not sure how that integrates with the coding question and points you raised above.

I have the Quaife LSD on my 335i for 3 years now. Nothing coded. No problem and you can really tell the difference as the car is not understeering anymore as it did in same situations before LSD.

I mostly drive the car in comfort/sport mode with DSC activated.

[kern417]

What about cruise control? On a previous car, I found that cruise control was disabled and threw a soft code because the car saw too much of a variation between engine rpm and the speedometer compared to what it would expect to see with stock gearing. It was the only thing affected and not much of a deal breaker for most, but I use it on longer trips.

Also curious if there are any issues with automatic rev matching for 6MT guys.

I don't see why any traction control settings would need to be adjusted. The car doesn't intervene unless it sees slip, and the LSD isn't working anymore after wheels slip. There are a ton of people with aftermarket units that haven't reported any issues.

[3ToAgree]

Maybe the 335i was different but the 340i for sure requires coding.

[kern417]

Originally Posted by 3ToAgree

Maybe the 335i was different but the 340i for sure requires coding.

Why? What does it do?

Traction control is looking for wheel slip and intervenes at that point. When would traction control interfere with an LSD's operation if the wheels aren't slipping?

[3ToAgree]

Originally Posted by kern417

Why? What does it do?

Traction control is looking for wheel slip and intervenes at that point. When would traction control interfere with an LSD's operation if the wheels aren't slipping?

Honestly, not sure but I know the dealer had to do coding on the install. Someone mentioned above it was linked to traction control but not sure how the computer needs to adjust.

[kern417]

Originally Posted by 3ToAgree

Honestly, not sure but I know the dealer had to do coding on the install. Someone mentioned above it was linked to traction control but not sure how the computer needs to adjust.

I guess i understand that the dealer might do it, but i don't think it's necessary. You'll still see the benefits of an LSD without any coding to traction control. It might be coding something else though, I just can't imagine what.

Then again, people have commented on needing coding for big brake kits. That just baffles me.

[3ToAgree]

Originally Posted by kern417

I guess i understand that the dealer might do it, but i don't think it's necessary. You'll still see the benefits of an LSD without any coding to traction control. It might be coding something else though, I just can't imagine what.

Then again, people have commented on needing coding for big brake kits. That just baffles me.

Funny you say that, I also have the M Performance BBK and the dealer did required coding for that also. They said the coding was related to having to adjust the ABS refresh rates versus stock brakes or something of that nature. My car is still under warranty so my base assumption is that it's doing something and I have just done it.

[kern417]

Originally Posted by 3ToAgree

Funny you say that, I also have the M Performance BBK and the dealer did required coding for that also. They said the coding was related to having to adjust the ABS refresh rates versus stock brakes or something of that nature. My car is still under warranty so my base assumption is that it's doing something and I have just done it.

I kind of thought that could be the case and makes sense, because abs is electronically controlled. So I can see that, but still weird that a bbk requires coding but upgraded rotors/pads that may make your car stop just as fast, don't. I still think there is some fluff to that requirement, maybe safety regulations or something that they have to meet as an OEM provider for aftermarket upgrades. But did the brakes actually feel any different before and after coding (if you tried it)?

the thing about our diff is nothing's electronically controlled. with an aftermarket diff you won't have any electronics either. but maybe someone that knows more than us will stumble on the thread and explain.