[Mr. 340]

Greetings,
I am looking to get an LSD for my RWD 340i soon. Researched a lot but would like to know if anyone here is personally running either on of these LSDs to leave any feedback or recommendations on which one is better.

The reason I want an LSD is mostly to be able to get traction on both rear wheels since the car comes with open diff. Since I am adding more power I want to be able to put that power down. Also I like drifting and doing some power slides once in a while.

And sometimes when entering some parking spaces that are steep, one of my rear wheels sometimes comes off the ground and spins giving me no traction while the other wheel doesn't have any power. Trying to get rid of this issue.

Thanks!

[F32Fleet]

Wavetrac IF you intend to spend a lot of time tracking the car. The WT won't turn into an open diff if you get a wheel off the ground. For street it's a toss up. Buy on price, availability, etc.

[Hiflyer731]

Interested in what you find and decide. These cars really need an LSD.

[NISFAN]

I have a Quaife and love it. Really locks up when launching or accelerating hard with steering angle. A must on these cars.

[Mr. 340]

Originally Posted by F32Fleet

Wavetrac IF you intend to spend a lot of time tracking the car. The WT won't turn into an open diff if you get a wheel off the ground. For street it's a toss up. Buy on price, availability, etc.

I don't intend on tracking the car much, but I do need a LSD that doesn't spin if one of the wheel comes off the ground. If Wavetrac provides that function, then I should probably just spend a little more and get that one instead.

Thanks!

[Mr. 340]

Originally Posted by Hiflyer731

Interested in what you find and decide. These cars really need an LSD.

Agreed. Sucks that BMW doesn't make it standard for the 340s. I'll keep you updated on what I end up getting. So far it looks like Wavetrac is taking the win.

[Mr. 340]

Originally Posted by NISFAN

I have a Quaife and love it. Really locks up when launching or accelerating hard with steering angle. A must on these cars.

Great to hear! Have you had any issues or anything? How was the installation process? I have read that Quaife LSDs are very reliable and I am also looking for reliability. Do both wheels always spin together or do you have moments in which one of them spins freely?

[MTWO]

Had both on my cars. Don’t see a point spending extra on the Quaife but both are great

[NISFAN]

Originally Posted by Alan340

Great to hear! Have you had any issues or anything? How was the installation process? I have read that Quaife LSDs are very reliable and I am also looking for reliability. Do both wheels always spin together or do you have moments in which one of them spins freely?

Install went well, I actually had a machine shop do the ring gear cut for me.
No issues with Quaife, as you would expect, they have been making these since before time began.

I've never noticed this one wheel lift issue that is made so much about. That includes me getting airborne on some of the small arch bridges in rural England.

All I know is these cars must have an LSD, the type is not so important maybe, but you have just got to get one.

[Mr. 340]

Originally Posted by NISFAN

Install went well, I actually had a machine shop do the ring gear cut for me.
No issues with Quaife, as you would expect, they have been making these since before time began.

I've never noticed this one wheel lift issue that is made so much about. That includes me getting airborne on some of the small arch bridges in rural England.

All I know is these cars must have an LSD, the type is not so important maybe, but you have just got to get one.

Yeah, Quaife has been around for a while now, so I would expect a quality product. Nice, so you haven't had any issues! Thanks for the input Once I get my meth kit installed and my costume tune I'll see which one I go with.

[theone1973]

Originally Posted by Alan340

Yeah, Quaife has been around for a while now, so I would expect a quality product. Nice, so you haven't had any issues! Thanks for the input Once I get my meth kit installed and my costume tune I'll see which one I go with.

I also have quaife Very happy !

Got mine fitted at workshop in Sweden 2300 euro total.

[Solid67]

Originally Posted by theone1973

I also have quaife Very happy !

Got mine fitted at workshop in Sweden 2300 euro total.

So the quaife is a straight plug and play for any of the xdrive cars?

[yokata]

Originally Posted by Solid67

So the quaife is a straight plug and play for any of the xdrive cars?

Bro you have AWD ,dont need LSD.

[Solid67]

Originally Posted by yokata

Bro you have AWD ,dont need LSD.

You have a point, but since most performance, AWD cars come with an LSD and for those of using xDelete, a differential would be nice to get the most out of it. It would still be nice even if you stick full time with xdrive. Just trying to see what the total cost with installation was.

[WolfGTI]

Popular misconception - LSD will make the XDrive even better.

Originally Posted by yokata

Bro you have AWD ,dont need LSD.

[yokata]

Originally Posted by Solid67

You have a point, but since most performance, AWD cars come with an LSD and for those of using xDelete, a differential would be nice to get the most out of it. It would still be nice even if you stick full time with xdrive. Just trying to see what the total cost with installation was.

For me this xdelete is full of shit u wear the extra weight and its not even close to rwd except donuts ofc ,so guys pls decide what u want rwd or awd....

[theone1973]

Originally Posted by Solid67

So the quaife is a straight plug and play for any of the xdrive cars?

Not sure about x drives mate

Mine is 2wd..I think it took around 4 hours to fit.

[kern417]

Originally Posted by yokata

Bro you have AWD ,dont need LSD.

Anyone who enjoys turns needs an LSD.

Wavetrac I'd say is just as reliable as Quaife, but the clutches wear out like on any other clutch based LSD. So it's hard to say how long it'll take, but eventually their main selling point will stop working. But at that point it'll operate just like Quaife or any other mechanical LSD.

I have wavetrac on another car and no complaints. But personally I'd go with the mperformance one if your car is RWD. It just makes the process so simple whereas I've had issues in the past with picking the wrong machine shop to install an LSD.

[Polo08816]

Originally Posted by kern417

Anyone who enjoys turns needs an LSD.

Wavetrac I'd say is just as reliable as Quaife, but the clutches wear out like on any other clutch based LSD. So it's hard to say how long it'll take, but eventually their main selling point will stop working. But at that point it'll operate just like Quaife or any other mechanical LSD.

I have wavetrac on another car and no complaints. But personally I'd go with the mperformance one if your car is RWD. It just makes the process so simple whereas I've had issues in the past with picking the wrong machine shop to install an LSD.

Wavetrac has clutches?

[conradb58]

Originally Posted by Polo08816

Wavetrac has clutches?

it's a clutch plate style differential

[Polo08816]

Originally Posted by kern417

Anyone who enjoys turns needs an LSD.

Wavetrac I'd say is just as reliable as Quaife, but the clutches wear out like on any other clutch based LSD. So it's hard to say how long it'll take, but eventually their main selling point will stop working. But at that point it'll operate just like Quaife or any other mechanical LSD.

I have wavetrac on another car and no complaints. But personally I'd go with the mperformance one if your car is RWD. It just makes the process so simple whereas I've had issues in the past with picking the wrong machine shop to install an LSD.

Originally Posted by conradb58

it's a clutch plate style differential

Originally Posted by Polo08816

Wavetrac has clutches?

I was under the impression that a Wavetrac is a helical gear differential similar to Quaife.

https://diffsonline.com/bmw-differen...formation.html

Wavetrac: Wavetrac's helical limited slip carrier. The beauty of the Wavetrac is that it is ideally suited to high performance road cars that see track use. It is very strong, yet transparent to both driver and traction control electronics during regular driving. On the track or in spirited road use, it provides two wheel drive without the handling issues that traditional clutch type diffs create (there is no tendency to push/understeer with a Wavetrac.) The Wavetrac outperforms other gear type diffs because unlike them, it won't lost drive when one axle is unloaded (which happens more often than you'd think. Lastly, one of the most underrated benefits of the Wavetrac is its smooth delivery of the power near the limit. It's patented design makes for a very predictable, smooth addition of power when you need it most- when things are at their limits: on the edge of traction mid corner and you're using throttle to keep it there; or coming into a corner a little hot, but quickly back on it to maintain exit speed…These situations are often subjective to the driver, but the benefit can be felt. The Wavetrac makes you faster because it lets you drive with confidence.

QUAIFE ATB: This differential is QUAIFE's Automatic Torque Biasing unit. QUAIFE does not specify bias ratio details and generally, does not use the term. The QUAIFE ATB differential is an all helical gear design. The angle and tooth form of the helix used, the number of pinions used, and many other factors (including the particular car fitted) all contribute to how the differential behaves and biases drive torque. Each QUAIFE differential application is designed to offer the best compromise between performance and durability. We recommend Redline 75W110 fluid for this application.

[kern417]

Originally Posted by Polo08816

I was under the impression that a Wavetrac is a helical gear differential similar to Quaife.

https://diffsonline.com/bmw-differen...formation.html

It is but I believe the feature that allows it to keep transferring power when one wheel is in the air is clutch/friction-based and can wear.