[Skycaptain]

Hi everyone, new here and not the most mechanically minded person so thought I could get some feeback please.
Purchased an m240i and will be fitting a limited slip diff. I can buy the BMW version fitted for almost the same price as the quaife version fitted through an after market BMW specialist tune shop. Are there any differences that a person can tell whilst driving the car such as sound/performance comparing the two?
Both offer warranty on the part and BMW on the rest of the car as well, assuming BMW would never know the quaife is fitted if something went wrong other than the lsd, they can't blame the quaife.

So which would you fit?

Cheers

[fbsm]

I have the M Perf LSD

It works....is quiet.....was over priced but still carries balance of warranty with car.....its also not particularly agressive with a 30% lockup

All things equal I would go with he quaife if I were to do it over again.

Better made, more agressive lockup

[Skycaptain]

Originally Posted by fbsm

I have the M Perf LSD

It works....is quiet.....was over priced but still carries balance of warranty with car.....its also not particularly agressive with a 30% lockup

All things equal I would go with he quaife if I were to do it over again.

Better made, more agressive lockup

Thanks for the response. Just to clarify is the M perf lsd a different manufacturer or is that the BMW m performance lsd from factory? If not, is there a percentage difference aggressiveness or feel, between the quaife and BMW versions?

[fbsm]

Originally Posted by Skycaptain

Thanks for the response. Just to clarify is the M perf lsd a different manufacturer or is that the BMW m performance lsd from factory? If not, is there a percentage difference aggressiveness or feel, between the quaife and BMW versions?

M perf = BMW factory/port option

[wdc330i]

Originally Posted by Skycaptain

Thanks for the response. Just to clarify is the M perf lsd a different manufacturer or is that the BMW m performance lsd from factory? If not, is there a percentage difference aggressiveness or feel, between the quaife and BMW versions?

They are one in the same. And now a dealer-installed part. http://www.shopbmwusa.com/PRODUCT/55...P-DIFFERENTIAL

[Skycaptain]

Originally Posted by fbsm

I have the M Perf LSD

It works....is quiet.....was over priced but still carries balance of warranty with car.....its also not particularly agressive with a 30% lockup

All things equal I would go with he quaife if I were to do it over again.

Better made, more agressive lockup

Can you notice the lsd in sport+ when driven accordingly, as appossed to not having one in place in the same setting? Or only when traction is completely off and driven accordingly?

Edit, found the info.

[p912guy]

Search in the Engine, Transmission and Tuning sub-forms for M235 and M240 and you'll find several very helpful threads. I was looking into this subject back in February and found lots of info. In the end, the cost benefit analysis determined the $3K was more useful in my bank account than in adding an LSD to my M235i.

[Skycaptain]

Originally Posted by p912guy

Search in the Engine, Transmission and Tuning sub-forms for M235 and M240 and you'll find several very helpful threads. I was looking into this subject back in February and found lots of info. In the end, the cost benefit analysis determined the $3K was more useful in my bank account than in adding an LSD to my M235i.

Thanks for that, seems the quaife is the way to go. I couldn't find or I missed if an lsd has any noticeable difference when in sports+

[ORIGIN M.]

Quaife all day

[Skycaptain]

After finding all the info and reading this review from a fellow member it seems the BMW lsd might be the better option. Not sure as yet.

http://www.2addicts.com/forums/showt...1077876&page=2

[Mywifes335]

I haven't been able to find the M-Performance LSD for under $2K. Cheapest was here:

https://www.bmwpartswholesale.com/oe...CABEgIX7vD_BwE

Also... might start a new thread - ANYONE know why BMW put a 2.81 rear in the new F22 M235/240 automatics versus the 3.08 that it uses for the pre-2017 automatics and all manuals?

[Skycaptain]

Originally Posted by Mywifes335

I haven't been able to find the M-Performance LSD for under $2K. Cheapest was here:

https://www.bmwpartswholesale.com/oe...CABEgIX7vD_BwE

Also... might start a new thread - ANYONE know why BMW put a 2.81 rear in the new F22 M235/240 automatics versus the 3.08 that it uses for the pre-2017 automatics and all manuals?

Ordered the quaife in the end. Diff is awaiting car, still got ages till it arrives

[CAMOETO]

Originally Posted by Mywifes335

I haven't been able to find the M-Performance LSD for under $2K. Cheapest was here:

https://www.bmwpartswholesale.com/oe...CABEgIX7vD_BwE

Also... might start a new thread - ANYONE know why BMW put a 2.81 rear in the new F22 M235/240 automatics versus the 3.08 that it uses for the pre-2017 automatics and all manuals?

They didn't just change the diff final drive gear in 2017 from 3.08 to 2.81 (9% less aggressive), they also changed gearing in the ZF 8-speed to be more aggressive in low gears to make up for the change in the diff gear while actually being less aggressive in the overdrive gears for improved fuel economy. 1st gear in 2017+ is 5.00 vs 4.71 in pre-2017 (6% more aggressive), while 8th gear in 2017+ is 4.64 vs 4.67 in pre-2017 (5% less aggressive).

2017 -
http://www.bmwusa.com/Standard/Content/Vehicles/2017/2/M240iCoupe/Features_and_Specs/M240iCoupeSpecifications.aspx

2014 - http://www.cars-data.com/en/bmw-m235i-coupe-specs/62196

[XutvJet]

Originally Posted by Skycaptain

After finding all the info and reading this review from a fellow member it seems the BMW lsd might be the better option. Not sure as yet.

http://www.2addicts.com/forums/showt...1077876&page=2

That thread is quite good and anyone considering a true LSD in this car should read the first post a couple of times because there's a wealth of comparison information between the stock eLSD, MP LSD, and the Quaife LSD. This statement in the first post is something I entirely agree with:

"If you are looking for an LSD for bad weather traction or for hard driving up to, and including, a single track day per year, don’t bother. The E-diff is actually quite good."

This is so important. Another thing owners must understand is that the eLSD is only active in DSC Off. All other modes and it's the traction and stability control systems dealing with the spin. The eLSD is completely off. Those nannies make the differential feel like an open diff getting controlled by nannies. It's operation is abrupt, inconsistent, and often allows for the typical one wheel spinning. In DSC Off, the eLSD does a pretty dang good job of imitating a viscous limited slip differential (VLSD) type setup. Both tires spin and the back end will drift and slide as far as you want it to. During somewhat aggressive B road driving, it is very hard for me find much fault in the eLSD especially if you're running the OEM MPSS tires. I say VSLD because it's not perfect and doesn't quite behave like a nicer mechanical unit like you'll get with the MP or Quaife units. I read article after article about how the M235/240 NEEDS a true LSD but then you find out the author was only testing the car in Sport or Sport+. If they only knew how well BMW's eLSD works on the street.

If you do routinely do track and/or auto-x, a mechanical LSD should be high on your list right after brake pads, fluid, and tires. In that order.

If you're looking for a mechanical LSD to improve your street driving experience, you might be a bit disappointed in the cost benefit. I'd strongly suggest driving around in DSC Off for a few days to feel just how good the car is with the nannies off.

My M235 is a 6MT and I've been researching LSDs for over a year now. What I really want to do is swap the MP LSD from the current gen 335/435 because it comes with a 3.23 gear vs the M235's 3.08 gear. That would give my M235 basically the same gearing as an M2. I'm trying to figure out if it's a direct swap. I would assume yes, but you never know with BMWs.

[Skycaptain]

I made the choice simple. If BMW gave you the option without charge for the elsd or lsd I'm sure not one person would option the elsd. Then it comes down to price, you can either afford it or you can't.

[XutvJet]

I don't believe that to be the case for many in here. I could have comfortably purchased a car far more expensive and I'm sure my story is not much different from many in here. I knew the eLSD was decent and wanted to really understand the car's limitations on the street, where i do 99.5% of my driving, before plucking down a couple of grand on this modificaion.
If anything, I feel the 6mt's biggest issue is It's somewhat long gearing rather than the lack of a mechanical LSD.

[Dylan86]

A lot of people (the ones w/o an LSD namely) or for any that haven't had one in the past don't understand how impactful it can be, in a good way.. It's not just about lock up on accel/decel, or transferring power without intervention to the wheel with the most grip through a corner. While these are the main benefits of the mechanical units, ones the eLSD won't give you on demand, there's more. Driving around town, the car will feel tighter, at low and high speeds. It will improve turn in and acceleration ability as well, something not a lot of people factor into the equation. I drove another 2er without the LSD and it was noticeable, just like getting into any other RWD non LSD BMW, it's just a sense of "loose" or "lack" of traction in the rear end, at all speeds, and noticeable on uneven and bumpy roads.

I think if anyone drives these cars hard, they should aquire the LSD before going FBO, or getting Coilovers, it's a game changer. A friend just installed his Quaife which was purched for under $2k on the forums (w/ pumpkin) and couldn't be happier about the car now. He was on the fence with the car after the first year, and felt it to be a bit underwhelmed coming from an M3, from a driving perspective, but he is content enough to keep it now.. Says a lot about these little mechanical gems.

[CAMOETO]

Originally Posted by Dylan86

A lot of people (the ones w/o an LSD namely) or for any that haven't had one in the past don't understand how impactful it can be, in a good way.. It's not just about lock up on accel/decel, or transferring power without intervention to the wheel with the most grip through a corner. While these are the main benefits of the mechanical units, ones the eLSD won't give you on demand, there's more. Driving around town, the car will feel tighter, at low and high speeds. It will improve turn in and acceleration ability as well, something not a lot of people factor into the equation. I drove another 2er without the LSD and it was noticeable, just like getting into any other RWD non LSD BMW, it's just a sense of "loose" or "lack" of traction in the rear end, at all speeds, and noticeable on uneven and bumpy roads.

I think if anyone drives these cars hard, they should aquire the LSD before going FBO, or getting Coilovers, it's a game changer. A friend just installed his Quaife which was purched for under $2k on the forums (w/ pumpkin) and couldn't be happier about the car now. He was on the fence with the car after the first year, and felt it to be a bit underwhelmed coming from an M3, from a driving perspective, but he is content enough to keep it now.. Says a lot about these little mechanical gems.

Also, a mechanical LSD will be much on snow/ice with both wheels getting power. I drove my G8 GT (which came with an LSD) in the winter and it was like night and day compared to my 335i with no LSD. The G8 got traction no problem in pretty deep snow, while the 335i was frequently a one tire slushy maker with no nannies, or just standing still and doing nothing with the nannies in the same conditions. Same Bridgestone Blizzack tires on both cars.

[madmax240]

Originally Posted by Skycaptain

Hi everyone, new here and not the most mechanically minded person so thought I could get some feeback please.
Purchased an m240i and will be fitting a limited slip diff. I can buy the BMW version fitted for almost the same price as the quaife version fitted through an after market BMW specialist tune shop. Are there any differences that a person can tell whilst driving the car such as sound/performance comparing the two?
Both offer warranty on the part and BMW on the rest of the car as well, assuming BMW would never know the quaife is fitted if something went wrong other than the lsd, they can't blame the quaife.

So which would you fit?

Cheers

private message sent.

[wdc330i]

Originally Posted by Dylan86

A lot of people (the ones w/o an LSD namely) or for any that haven't had one in the past don't understand how impactful it can be, in a good way.. It's not just about lock up on accel/decel, or transferring power without intervention to the wheel with the most grip through a corner. While these are the main benefits of the mechanical units, ones the eLSD won't give you on demand, there's more. Driving around town, the car will feel tighter, at low and high speeds. It will improve turn in and acceleration ability as well, something not a lot of people factor into the equation. I drove another 2er without the LSD and it was noticeable, just like getting into any other RWD non LSD BMW, it's just a sense of "loose" or "lack" of traction in the rear end, at all speeds, and noticeable on uneven and bumpy roads.

I think if anyone drives these cars hard, they should aquire the LSD before going FBO, or getting Coilovers, it's a game changer. A friend just installed his Quaife which was purched for under $2k on the forums (w/ pumpkin) and couldn't be happier about the car now. He was on the fence with the car after the first year, and felt it to be a bit underwhelmed coming from an M3, from a driving perspective, but he is content enough to keep it now.. Says a lot about these little mechanical gems.

Thank you for taking the time to write this.

I've been on the fence about adding the oem LSD, given the expense. But I find myself really missing the surefootedness of my e46 M3C. The 2 just doesn't seem as confidence-inspiring or as fun powering out of curves as the M3. Otherwise, they are very similar in size, power, and flickability.

Also, this is my daily driver even in inclement weather. I won't be putting on snows for the winter, as I did with the M (when I was living in Maryland). But I will change out to the new Michelin A/S+ tires. Hoping with the LSD, the car can better handle the very occasional nastiness that Atlanta brings. Topography is quite hilly here two, so any nastiness is made worse by the elevation.

[CAMOETO]

Originally Posted by wdc330i

Thank you for taking the time to write this.

I've been on the fence about adding the oem LSD, given the expense. But I find myself really missing the surefootedness of my e46 M3C. The 2 just doesn't seem as confidence-inspiring or as fun powering out of curves as the M3. Otherwise, they are very similar in size, power, and flickability.

Also, this is my daily driver even in inclement weather. I won't be putting on snows for the winter, as I did with the M (when I was living in Maryland). But I will change out to the new Michelin A/S+ tires. Hoping with the LSD, the car can better handle the very occasional nastiness that Atlanta brings. Topography is quite hilly here two, so any nastiness is made worse by the elevation.

The LSD should help for sure. Less nanny intervention in normal driving modes and much more capable in DSC off mode. I also have high hopes for the LSD in my 240i for the winter, which is the reason I got a winter wheel set Continental DWS AS tires instead of full on winters which I dread.

[wdc330i]

My M3 was unstoppable with winter tires (Michelin Pilot Alpin 2s, if I remember correctly). Unless it was deep snow, of course.

Will be interesting to see how the 240 does with the latest gen of Michelin all-seasons--which are supposed to be a major advancement. I had them briefly on my RWD E91 before I sold the car, and they were great. Didn't have a chance to try them in winter, though.

The DWS tires are pretty great, too. I had them on our E46 325xiT, and went through a few storms pretty well.

Now, how concerned to have to be with my dealer doing the differential swap? I dread them breaking something. I'm not sure how many--if any--of these they've done. They're a big dealer, but not especially performance-oriented.