LSD or Wider Wheels/Tires?

RotorOver · 09-26-2017, 01:54 PM

Quote:

Originally Posted by wdc330i

Quote:

Originally Posted by RotorOver

Just pulled the trigger on a Wavetrac LSD from Diffsonline. Stepping down to a 3.08 final drive ratio from the 2.81 in the auto. I'll report back once I get it installed.

Nice! We'll have to compare notes. My OEM LSD gets installed today.

Sounds good and hope you enjoy it!

XutvJet · 09-26-2017, 02:46 PM

How much are you guys paying for install and who's doing it?

RotorOver · 09-26-2017, 06:04 PM

Quote:

Originally Posted by XutvJet

How much are you guys paying for install and who's doing it?

I just ordered it, so I haven't contacted my shop yet. I've read in other threads 3-3.5 hours of labor is the norm though.

wdc330i · 09-27-2017, 10:35 AM

Quote:

Originally Posted by XutvJet

How much are you guys paying for install and who's doing it?

Local dealer. $2,575 before tax. They were running a parts special, the diff at "dealer cost." So, the part was $2,000 and install is $575, per BMW's website.

Dylan86 · 09-27-2017, 01:39 PM

Quote:

Originally Posted by wdc330i

Nice! We'll have to compare notes. My OEM LSD gets installed today.

Nice!

RotorOver · 09-28-2017, 05:44 PM

Quote:

Originally Posted by XutvJet

How much are you guys paying for install and who's doing it?

My local indie shop quoted me $450 for the install.

wdc330i · 09-28-2017, 07:12 PM

Quote:

Originally Posted by RotorOver

My local indie shop quoted me $450 for the install.

The advantage to paying dealer rates is that the part is covered for the life of your car warranty. That to me is worth $125 premium.

RotorOver · 09-28-2017, 09:03 PM

Quote:

Originally Posted by wdc330i

The advantage to paying dealer rates is that the part is covered for the life of your car warranty. That to me is worth $125 premium.

The trade-off is the Wavetrac has a full lifetime warranty good for any and all operating conditions, including racing, for the original and subsequent owners.

Which dealer did the work? First impressions?

wdc330i · 09-29-2017, 06:41 AM

Quote:

Originally Posted by RotorOver

The trade-off is the Wavetrac has a full lifetime warranty good for any and all operating conditions, including racing, for the original and subsequent owners.

Which dealer did the work? First impressions?

Cool.

Nalley, which was where I bought the car. First impressions are in this thread. I haven't had the time to put many miles on yet.

http://www.2addicts.com/forums/showthread.php?t=1423890

RotorOver · 09-29-2017, 06:56 AM

Quote:

Originally Posted by wdc330i

Quote:

Originally Posted by RotorOver

The trade-off is the Wavetrac has a full lifetime warranty good for any and all operating conditions, including racing, for the original and subsequent owners.

Which dealer did the work? First impressions?

Cool.

Nalley, which was where I bought the car. First impressions are in this thread. I haven't had the time to put many miles on yet.

http://www.2addicts.com/forums/showthread.php?t=1423890

Good to hear you can feel the difference right off the bat! I?m looking forward to it- install is scheduled for Wednesday at Solo MotorSports.

wdc330i · 09-29-2017, 07:43 AM

Re: feeling it. It helps to have owned and driven daily RWD cars with LSDs. Especially the E46 M3, which had similar power, weight, size, and the staggered wheel setup as the M240.

Ever since I bought it, the 2 has felt like it has more power than grip and composure. Now it feels like it has all three.

For those pursuing tunes and power kits for the 2, I would definitely recommend doing the LSD first. Unless you just want the power to blast ahead in a straight line on a smooth, flat road.

Dylan86 · 09-29-2017, 09:25 AM

Glad to hear you can feel it! It's hard to explain to some who are in doubt about the LSD, but it truly transforms the behavior, in the best possible way. Predictable power oversteer!

XutvJet · 09-29-2017, 12:08 PM

Quote:

Originally Posted by wdc330i

Cool.

Nalley, which was where I bought the car. First impressions are in this thread. I haven't had the time to put many miles on yet.

http://www.2addicts.com/forums/showthread.php?t=1423890

Some have noted that the car feels more stable, even under very normal driving. Are you finding that to be true?

wdc330i · 09-29-2017, 12:34 PM

Quote:

Originally Posted by XutvJet

Some have noted that the car feels more stable, even under very normal driving. Are you finding that to be true?

Yes. Feels more stable and predictable. But that makes sense, given how many road imperfections we encounter everywhere.

CAMOETO · 10-01-2017, 10:28 PM

Different car, I know, but my e90 335i with an open diff felt very nervous compared with my m240i, which has a m-performance LSD. It's much more predictable, especially in wet weather.

RotorOver · 10-07-2017, 10:00 AM

Got the Wavetrac LSD with a 3.08 final drive ratio installed. My car has the ZF auto, so the 2.81 final drive ratio was stock. I’ve only put about 60 miles on the car since then with half of it in bad traffic, but thought I’d offer some first impressions.

First off, you can most definitely feel the LSD doing its thing primarily from a stop and of course in and out of turns. With 1/3 and half throttle launches the car stays locked on with no walk that sometimes you can induce with the open diff. Keep in mind this is with the shorter final drive ratio which gets you through the lower gears quicker as well, so that is saying something. As far as turns, it feels like the car rotated quicker on entry especially apparent on tight turns. On one particular long, fast, sweeping turn on my commute home, I pushed it a bit harder than I normally would and the car felt so much more planted allowing to push even harder. I can now understand what people mean when they say the LSD is confidence inspiring.

The difference with the 3.08 final drive ratio is definitely noticeable as well. It makes Comfort mode more useable especially in acceleration as the car is quickly hitting the shift points with very little drop in rpm between. When on the throttle in Sport mode, it’s seems to hold the higher rpm vice looking for an up shift.

Interestingly, in stop and go traffic (avg speeds 15-20 mph) it appears to be producing better fuel economy as well, which to me is counter-intuitive. Granted it’s only a couple of data points, but that’s what I’ve seen.

Despite having these mods on the car just a short time, I’m already convinced it was worth the money. Thanks for the advice guys!

Edit: I really need to add that this is one of those transformational mods that makes this car even better. For me up there with the Dinan springs which transformed the car’s handling and ahead of the tune which was a leap in torque and power.

XutvJet · 10-07-2017, 11:10 AM

I wish there was a way to confirm that the M Performance LSD offered for the F3X chassis 3/4 N55 series would fit the 2 series. It's a 3.23 vs the M235's 3.08. It would be a hell of a lot cheaper to go that route than having someone build it. I've looked at tons of pictures and they seem to use the same exact pumpkin, axles, and they're the same rear subframes, but ya know, BMW does strange stuff and doesn't parts bin share all the time.

Dylan86 · 10-07-2017, 12:01 PM

Quote:

Originally Posted by XutvJet

I wish there was a way to confirm that the M Performance LSD offered for the F3X chassis 3/4 N55 series would fit the 2 series. It's a 3.23 vs the M235's 3.08. It would be a hell of a lot cheaper to go that route than having someone build it. I've looked at tons of pictures and they seem to use the same exact pumpkin, axles, and they're the same rear subframes, but ya know, BMW does strange stuff and doesn't parts bin share all the time.

My bet would be that it's compatible. Any way to have a vendor confirm dimensions/mounting points ? One that would stock both the F22/F30 models. I don't see why they'd change a casting, or subframe, for a car which belongs to the same parts bin (for the most part).

If the return policy is unused/uninstalled, try it? lol..

wdc330i · 10-07-2017, 01:35 PM

[/QUOTE]Edit: I really need to add that this is one of those transformational mods that makes this car even better.[/QUOTE]

I completely agree. I am really loving the improvement. I feel it every day, even at low speeds through my winding neighborhood. It makes me want to hold onto the car in perpetuity. At the very least, I don't ever want to have another RWD BMW without a mechanical LSD.

cosworthpower · 09-12-2018, 03:35 AM

Sorry to bring up an old thread, but is coding required to run a 3.08 ratio if changing from 2.81 so as not to throw the ECU?

RotorOver · 09-12-2018, 06:57 PM

Quote:

Originally Posted by cosworthpower

Sorry to bring up an old thread, but is coding required to run a 3.08 ratio if changing from 2.81 so as not to throw the ECU?

No worries. As I understand it, the ECU(s) should adapt, but in my case, I’m getting an occasional drive train malfunction warning that doesn’t persist, with no accompanying CEL or ill performance effects. Apparently, they are internal codes that can’t be seen with a standard OBD2 diagnostic tool. More of an annoyance than anything else. According to Dan at Diffsonline, he’s done dozens of the final drive changes to 3.08 and I’m the only he’s aware of having an issue. If the engine and/or ZF8 ECU doesn’t adapt, eventually I’ll pursue a programming solution now that the engine ECU is cracked (don’t know about the ZF8 ECU). I’ve read about this issue on older models and eventually it’s seems solutions were worked out.

cosworthpower · 09-12-2018, 10:00 PM

Just as you posted this I sent a PM.. thanks for the reply!

09-26-2017, 02:46 PM	#46
XutvJet Major General 5538 Rep 5,365 Posts Drives: 2011 Cayman Base, 2016 M235 Join Date: Mar 2016 Location: Kansas City iTrader: (-1)	How much are you guys paying for install and who's doing it?
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09-29-2017, 07:43 AM	#55
wdc330i Lieutenant 223 Rep 478 Posts Drives: '22 M440xi GC Join Date: Apr 2016 Location: Atlanta iTrader: (0)	Re: feeling it. It helps to have owned and driven daily RWD cars with LSDs. Especially the E46 M3, which had similar power, weight, size, and the staggered wheel setup as the M240. Ever since I bought it, the 2 has felt like it has more power than grip and composure. Now it feels like it has all three. For those pursuing tunes and power kits for the 2, I would definitely recommend doing the LSD first. Unless you just want the power to blast ahead in a straight line on a smooth, flat road. __________________ '22 M440xi GC (BSM/Tacora) Previous: 2017 M240i Convertible; 2016 X5 50i; 2017 Boxster 718s; 2012 328iT Sport; 2009 X5 3.0; 2006 M3C; 2006 530xiT; 2003 325xiT; 2002 330i Sport; 2001 Z3 2.5; 2001 330i.
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09-29-2017, 09:25 AM	#56
Dylan86 Colonel 1330 Rep 2,214 Posts Drives: F15d msport, F22 m235i Join Date: Jan 2016 Location: GTA iTrader: (0)	Glad to hear you can feel it! It's hard to explain to some who are in doubt about the LSD, but it truly transforms the behavior, in the best possible way. Predictable power oversteer!
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10-01-2017, 10:28 PM	#59
CAMOETO First Lieutenant 140 Rep 381 Posts Drives: 2017 m240i Join Date: Sep 2010 Location: SE MI iTrader: (2)	Different car, I know, but my e90 335i with an open diff felt very nervous compared with my m240i, which has a m-performance LSD. It's much more predictable, especially in wet weather. __________________ Current: 2019 640i GT, 2019 MX-5 GT-S, 2015 X1 xDrive35i Gone, but not forgotten: 2017 m240i, 2016 GTI PP, 2013 Camaro SS, 2009 G8 GXP, 2008 G8 GT, 2007 335i, 2003 530i
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10-07-2017, 10:00 AM	#60
RotorOver Newer 2er 296 Rep 474 Posts Drives: 2017 M240i (Sold) Join Date: Jun 2016 Location: Johns Creek, GA iTrader: (0) Garage List 2017 BMW M240i [10.00]	Got the Wavetrac LSD with a 3.08 final drive ratio installed. My car has the ZF auto, so the 2.81 final drive ratio was stock. I’ve only put about 60 miles on the car since then with half of it in bad traffic, but thought I’d offer some first impressions. First off, you can most definitely feel the LSD doing its thing primarily from a stop and of course in and out of turns. With 1/3 and half throttle launches the car stays locked on with no walk that sometimes you can induce with the open diff. Keep in mind this is with the shorter final drive ratio which gets you through the lower gears quicker as well, so that is saying something. As far as turns, it feels like the car rotated quicker on entry especially apparent on tight turns. On one particular long, fast, sweeping turn on my commute home, I pushed it a bit harder than I normally would and the car felt so much more planted allowing to push even harder. I can now understand what people mean when they say the LSD is confidence inspiring. The difference with the 3.08 final drive ratio is definitely noticeable as well. It makes Comfort mode more useable especially in acceleration as the car is quickly hitting the shift points with very little drop in rpm between. When on the throttle in Sport mode, it’s seems to hold the higher rpm vice looking for an up shift. Interestingly, in stop and go traffic (avg speeds 15-20 mph) it appears to be producing better fuel economy as well, which to me is counter-intuitive. Granted it’s only a couple of data points, but that’s what I’ve seen. Despite having these mods on the car just a short time, I’m already convinced it was worth the money. Thanks for the advice guys! Edit: I really need to add that this is one of those transformational mods that makes this car even better. For me up there with the Dinan springs which transformed the car’s handling and ahead of the tune which was a leap in torque and power. __________________ 2017 BMW M240i (Sold) 2021 F-150 Raptor 2017 Porsche 718 Cayman S 2017 Audi Q5 Last edited by RotorOver; 10-07-2017 at 10:15 AM..
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10-07-2017, 11:10 AM	#61
XutvJet Major General 5538 Rep 5,365 Posts Drives: 2011 Cayman Base, 2016 M235 Join Date: Mar 2016 Location: Kansas City iTrader: (-1)	I wish there was a way to confirm that the M Performance LSD offered for the F3X chassis 3/4 N55 series would fit the 2 series. It's a 3.23 vs the M235's 3.08. It would be a hell of a lot cheaper to go that route than having someone build it. I've looked at tons of pictures and they seem to use the same exact pumpkin, axles, and they're the same rear subframes, but ya know, BMW does strange stuff and doesn't parts bin share all the time.
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10-07-2017, 01:35 PM	#63
wdc330i Lieutenant 223 Rep 478 Posts Drives: '22 M440xi GC Join Date: Apr 2016 Location: Atlanta iTrader: (0)	[/QUOTE]Edit: I really need to add that this is one of those transformational mods that makes this car even better.[/QUOTE] I completely agree. I am really loving the improvement. I feel it every day, even at low speeds through my winding neighborhood. It makes me want to hold onto the car in perpetuity. At the very least, I don't ever want to have another RWD BMW without a mechanical LSD. __________________ '22 M440xi GC (BSM/Tacora) Previous: 2017 M240i Convertible; 2016 X5 50i; 2017 Boxster 718s; 2012 328iT Sport; 2009 X5 3.0; 2006 M3C; 2006 530xiT; 2003 325xiT; 2002 330i Sport; 2001 Z3 2.5; 2001 330i.
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09-12-2018, 03:35 AM	#64
cosworthpower New Member 2 Rep 10 Posts Drives: M140i Join Date: Sep 2018 Location: Sydney AU iTrader: (0)	Sorry to bring up an old thread, but is coding required to run a 3.08 ratio if changing from 2.81 so as not to throw the ECU?
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09-12-2018, 10:00 PM	#66
cosworthpower New Member 2 Rep 10 Posts Drives: M140i Join Date: Sep 2018 Location: Sydney AU iTrader: (0)	Just as you posted this I sent a PM.. thanks for the reply!
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