LSD Conversion Kit

Matticus91 · 09-05-2018, 10:13 AM

Alright so I've secured a deal with these guys to get a kit for testing in my car. In turn, I'm providing a detailed installation video as well as a review and followup videos of "testing" the kit in action.

They've been responsive, helpful and very fair and I'm personally very curious to see how this works out.

In addition to this deal, They're willing to organize a group buy for us:

5-10 units will make them just $240/set
10+ units they'll do $200/set!!

Those prices include shipping as well. Please think about it and vote below, keep in mind I'm not getting paid for this and if I think the kit is crap, I'll say so.

If you have any questions you'd want answered in a review, post them up!

www.racingdiffs.com

rdmarsiii · 09-05-2018, 10:24 AM

I'm interested!

zx10guy · 09-05-2018, 11:47 AM

As long as you come over to my place and help me install it.

durpflip · 09-05-2018, 12:16 PM

i'd be interested too, but i'm still a little new at this whole aftermarket LSD thing.

- is this a clutch-based LSD?
- would it work on an auto car? (don't roast me for this ok it's a DD)
- would it be harder to ship to canada?

desertman123 · 09-05-2018, 12:50 PM

Is this thing basically an aggressive "2-way"? Automatic 328i's are a dime a dozen in junkyards... I might pick up another diff for science.

The main thing I'm worried about is failure - how will it fail and will it be on the highway going 80?

Gangplank · 09-05-2018, 09:48 PM

Good on ya for setting this up. You really need 2 test mules. A 135i & a 128i. Get them installed, take em to the track, & drive them around the street.

gixracer · 09-06-2018, 03:10 PM

Quote:

Originally Posted by Gangplank

Good on ya for setting this up. You really need 2 test mules. A 135i & a 128i. Get them installed, take em to the track, & drive them around the street.

I got a diff ready for install, 328 small

02Pilot · 09-09-2018, 08:23 AM

Quote:

Originally Posted by desertman123

The main thing I'm worried about is failure - how will it fail and will it be on the highway going 80?

Failure in normal driving is likely to be benign and manifest simply as a loss of LS functionality, as the most likely failure point I can see is the friction surfaces. In track use, it's theoretically possible you could break a spring or something, but you'd need a lot more power to do so unless the springs are made of soft cheese.

The big unknown is the durability of the friction surfaces. It will take some testing time to figure that out. I'd love to see micrometer measurements and visual comparisons of the friction areas after a few thousand miles.

Matticus91 · 09-10-2018, 09:35 AM

Alright guys so here's the deal, the manual 135i's require machining to the crown ring and internal gears for this kit to work since the ring is welded to the diff. The LOE on this is too high for it to be worth it for me.

The company is still willing to offer a FREE kit to someone who is willing to step up and do this job, and then provide a detailed install video as well as a video for testing and review.

If anyone is interested, let me know and I'll put you in touch with the owner.

bm996tt · 09-10-2018, 11:58 AM

Buy a proven quality lsd, none of this makes sense to me unless your really hard up for cash= and then I would suggest revaluating priorities.

02Pilot · 09-10-2018, 04:24 PM

Quote:

Originally Posted by Matticus91

Alright guys so here's the deal, the manual 135i's require machining to the crown ring and internal gears for this kit to work since the ring is welded to the diff. The LOE on this is too high for it to be worth it for me.

The company is still willing to offer a FREE kit to someone who is willing to step up and do this job, and then provide a detailed install video as well as a video for testing and review.

If anyone is interested, let me know and I'll put you in touch with the owner.

What's the story with other drivetrain configurations? Is there a setup for which this is essentially drop-in, or do they all require machine work?

desertman123 · 09-10-2018, 08:38 PM

Quote:

Originally Posted by 02Pilot

What's the story with other drivetrain configurations? Is there a setup for which this is essentially drop-in, or do they all require machine work?

https://www.1addicts.com/forums/show...1412547&page=3

128i's have bolted ring gears.

chris_flies · 09-11-2018, 12:13 PM

Quote:

Originally Posted by desertman123

https://www.1addicts.com/forums/show...1412547&page=3

128i's have bolted ring gears.

The ONE thing that makes some 135i owners jealous.

I think older 135i/335i Autos had a bolted ring gear...

desertman123 · 09-11-2018, 12:15 PM

Quote:

Originally Posted by chris_flies

The ONE thing that makes some 135i owners jealous.

I think older 135i/335i Autos had a bolted ring gear...

Yep N54 autos have bolted ring gears. You can swap them into a 128i if you use the rear half of the 135i driveshaft

1and1 · 09-11-2018, 01:21 PM

Quote:

Originally Posted by chris_flies

...older 135i/335i Autos had a bolted ring gear...

As God intended they should be...

There's a video out there someplace of a shop cutting the ring gear off. Easy enough to do if you have very expensive tools....

chris_flies · 09-11-2018, 02:42 PM

Quote:

Originally Posted by 1and1

Quote:

Originally Posted by chris_flies

...older 135i/335i Autos had a bolted ring gear...

As God intended they should be...

There's a video out there someplace of a shop cutting the ring gear off. Easy enough to do if you have very expensive tools....

Anything's easy with expensive tools

ShocknAwe · 09-11-2018, 05:30 PM

I'd hate to be in the car when it fails.

desertman123 · 10-15-2018, 12:08 AM

So has anyone been crazy enough to try it?

View Poll Results: What is your interest level in these kits?
Very interested	14	37.84%
Curious, need more information and review	15	40.54%
Not interested	8	21.62%
Voters: 37. You may not vote on this poll

09-05-2018, 10:13 AM	#1
Matticus91 Brigadier General 3231 Rep 3,722 Posts Drives: 2013 135i Join Date: Aug 2015 Location: Washington DC iTrader: (6)	LSD Conversion Kit - Details and Group Buy Alright so I've secured a deal with these guys to get a kit for testing in my car. In turn, I'm providing a detailed installation video as well as a review and followup videos of "testing" the kit in action. They've been responsive, helpful and very fair and I'm personally very curious to see how this works out. In addition to this deal, They're willing to organize a group buy for us: 5-10 units will make them just $240/set 10+ units they'll do $200/set!! Those prices include shipping as well. Please think about it and vote below, keep in mind I'm not getting paid for this and if I think the kit is crap, I'll say so. If you have any questions you'd want answered in a review, post them up! www.racingdiffs.com __________________ "Tobias" 2013 135i ///M-Sport 6MT • Pure Stage 1 • XDI 35 HPFP • 404whp/440wtq IG: msteelio91
	Appreciate 2 chris_flies2749.50 BAN_M2C3317.50 Tweet Quote

09-05-2018, 10:24 AM	#2
rdmarsiii New Member 5 Rep 16 Posts Drives: 2012 135i Join Date: Nov 2017 Location: TX Panhandle iTrader: (0)	I'm interested!
	Appreciate 1 Matticus913230.50 Quote

09-05-2018, 12:16 PM	#4
durpflip Enlisted Member 15 Rep 45 Posts Drives: a superior vehicle Join Date: Jan 2017 Location: New Brunswick iTrader: (0) Garage List 2008 BMW 128i [0.00]	i'd be interested too, but i'm still a little new at this whole aftermarket LSD thing. - is this a clutch-based LSD? - would it work on an auto car? (don't roast me for this ok it's a DD) - would it be harder to ship to canada?
	Appreciate 1 Matticus913230.50 Quote

09-05-2018, 12:50 PM	#5
desertman123 E82 Mudflap Ambassador 1927 Rep 2,049 Posts Drives: '08 128i Join Date: May 2016 Location: Orlando, FL iTrader: (0) Garage List 2008 BMW 128i [5.00] 2014 BMW 528i [5.00]	Is this thing basically an aggressive "2-way"? Automatic 328i's are a dime a dozen in junkyards... I might pick up another diff for science. The main thing I'm worried about is failure - how will it fail and will it be on the highway going 80? __________________ My 2008 128i - Sparkling Graphite/Beige - Sport pkg - 6MT - Click me! Parents' 2014 528i - Mineral White/Ivory White - fully loaded Instagram @Andreys_128i
	Appreciate 2 Gangplank1365.00 Matticus913230.50 Quote

09-05-2018, 09:48 PM	#6
Gangplank Colonel 1365 Rep 2,831 Posts Drives: 2011 e82 135i n55 Sprt DCT - S Join Date: Nov 2015 Location: Port St. Lucie, FL iTrader: (1) Garage List 2011 135i [0.00]	Good on ya for setting this up. You really need 2 test mules. A 135i & a 128i. Get them installed, take em to the track, & drive them around the street. __________________ 2011 135i w/ DCT \| Sport Pkg \| PPK \| Ohlins R&T Swift Springs \| M3 Front Control Arms \| Diff. Brace \| RSFB Inserts
	Appreciate 1 Matticus913230.50 Quote

09-10-2018, 09:35 AM	#9
Matticus91 Brigadier General 3231 Rep 3,722 Posts Drives: 2013 135i Join Date: Aug 2015 Location: Washington DC iTrader: (6)	Alright guys so here's the deal, the manual 135i's require machining to the crown ring and internal gears for this kit to work since the ring is welded to the diff. The LOE on this is too high for it to be worth it for me. The company is still willing to offer a FREE kit to someone who is willing to step up and do this job, and then provide a detailed install video as well as a video for testing and review. If anyone is interested, let me know and I'll put you in touch with the owner. __________________ "Tobias" 2013 135i ///M-Sport 6MT • Pure Stage 1 • XDI 35 HPFP • 404whp/440wtq IG: msteelio91
	Appreciate 1 chris_flies2749.50 Quote

09-10-2018, 11:58 AM	#10
bm996tt Private First Class 43 Rep 157 Posts Drives: 2013 135is Join Date: May 2017 Location: Pa iTrader: (0)	Buy a proven quality lsd, none of this makes sense to me unless your really hard up for cash= and then I would suggest revaluating priorities.
	Appreciate 0 Quote

09-11-2018, 05:30 PM	#17
ShocknAwe 1Addict 2670 Rep 7,257 Posts Drives: E82 Mutt Join Date: Jul 2012 Location: Charleston iTrader: (22)	I'd hate to be in the car when it fails. __________________ 2010 135i 6MT Jet Black N54/3 Converted ///Mutt \| BUILD THREAD \| GARAGE SALE
	Appreciate 0 Quote

10-15-2018, 12:08 AM	#18
desertman123 E82 Mudflap Ambassador 1927 Rep 2,049 Posts Drives: '08 128i Join Date: May 2016 Location: Orlando, FL iTrader: (0) Garage List 2008 BMW 128i [5.00] 2014 BMW 528i [5.00]	So has anyone been crazy enough to try it? __________________ My 2008 128i - Sparkling Graphite/Beige - Sport pkg - 6MT - Click me! Parents' 2014 528i - Mineral White/Ivory White - fully loaded Instagram @Andreys_128i
	Appreciate 0 Quote

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