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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-13-2013, 10:35 PM   #121
wanganstyle
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I will be supplying knock down kits for current diff builder clients (b2b) in Europe/aus/asia; I'm not sure the adaptation is easy enough to give out to individuals to assemble; those with the skills/tools to build this kind of unit will likely be a very high end speed shop or differential/gearing specialist.

Parts to allow for this conversion have taken quite a long time to re-engineer; building differentials is something I have been doing for over a decade; this conversion was extremely time consuming and not for the faint of heart or budget user.

A lot of precise setup is required; diff building is pretty simple but there is a learning curve (much like wheel to wheel track racing with contact).

Two units were built from scratch here in the Bay Area; both are different styles and purpose built for their applications; the billet spacer LSD is for a 600rwhp turbocharged e39.

Billet ring gear spacer is for LOW ratios; 2.35/2.65/2.93/3.07 final drive is available for those going for turbo or v8 power setups.

Billet top cap adaptation is considerably more expensive in cost and is for: 3.15/3.23/3.38/3.46/3.64/3.73/3.91/ 4.10-4.88 final drive ratios. The costs increase quite a bit as the center stack had to be repositioned with bespoke billet parts (and USA labor costs).

Guys running double over drive T56+Lsx v8 engines have picked anywhere between 3.15-4.45 ratios.

The cheapest/easiest way to get a LSD into a e46non m is to buy a Kaaz and stuff it in. Hopefully one understands how to set it up: or deal with its grumpiness. Many Japanese car friends use them and have had to remove/re set multiple times- average for friends with street driven HPDE 350z/370z friends to re set the Kaaz has been about 3x.

Notes on KAAZ:

it's a Race unit. Annoying as hell on street for low speed parking/u turns etc if ran as is out of the box bran new. It's strong as hell but requires KAAZ fluid only (not cheap at all). Kaaz uses steel discs and oil expansion to lock- no clutch material. Using the special kaaz Oil is incredibly important in that style of diff; conventional cheap 75-90 will have very increased wear in the Kaaz center section. Rebuild / reset is also recommended every couple years depending on application.

If comparing an e30 with Kaaz or Oem LSD in a car that needs to see street duty; ill take the ZF OEM unit every day; I removed the Kaaz in my streeted e30 and replaced it a Oem zf unit to save my ears from noise when parking
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LSD dreamers thread

http://forum.e46fanatics.com/showthread.php?p=14989087
WSG Billet CNC LSD production Development
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http://forums.bimmerforums.com/forum....php?t=1437471

Last edited by wanganstyle; 01-15-2013 at 01:17 AM.
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Old 01-14-2013, 03:28 AM   #122
Thaniel
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Originally Posted by wanganstyle View Post
Billet ring gear spacer is for LOW ratios; 2.35/2.65/2.93/3.07 final drive is available for those going for turbo or v8 power setups.

Billet top cap adaptation is considerably more expensive in cost and is for: 3.15/3.23/3.38/3.46/3.64/3.73/3.91/ 4.10-4.88 final drive ratios. The costs increase quite a bit as the center stack had to be repositioned with bespoke billet parts (and USA labor costs).
Ah thanks. That helps.

I've rebuilt a few transmissions (manual and automatic). Not done a diff yet but think i could manage to set one up. Would be fun to find out
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Old 01-15-2013, 07:33 PM   #123
wanganstyle
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Originally Posted by Thaniel View Post
Ah thanks. That helps.

I've rebuilt a few transmissions (manual and automatic). Not done a diff yet but think i could manage to set one up. Would be fun to find out

For those with very good resources ($0 machine shop access) and hardcore DIY skills (seems like you) it is possible
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LSD dreamers thread

http://forum.e46fanatics.com/showthread.php?p=14989087
WSG Billet CNC LSD production Development
http://forums.bimmerforums.com/forum...pdate-backdate
S54B32+E36 1997 M3 Sedan+DTA S100 alpha N
http://forums.bimmerforums.com/forum....php?t=1437471

Last edited by wanganstyle; 01-16-2013 at 04:51 AM.
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Old 04-15-2013, 12:47 PM   #124
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Wish you were selling these in the U.S.

That said, the amount of work makes it look like it would still be pretty expensive.

I race in SCCA Solo (autocross) here in the U.S. and would like to stay in a class that uses street tires, but the class I want to stay in allows aftermarket diffs, but they have to retain the street car's original ratio, which for me, is the 2.93.

No one that I'm aware of makes a 2.93 ratio LSD. This is due to the ring gear size, I guess?

Anyway, if you have any ideas as to getting a 2.93 LSD build relatively reasonably, say, under $2k U.S. let me know.

Nice work. I wish I had half those tools and one tenth of the knowledge.
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Old 04-15-2013, 01:24 PM   #125
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performancegearing.com - $2k for a 2.93 with LSD in the housing.

I'm using 40/90 ramps, with 45lb static lock, which I'd recommend for an STX build, if you want to go that way.
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Old 04-15-2013, 02:46 PM   #126
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Thanks Matt.

Still trying to decide if it's worth it, or I want to go DSP, or just use this perfectly wonderful street car for groceries, and kid hauling and get something else.

With all the fast drivers and cars in the Austin club, DSP is beginning to pique my interest, but it would be at least a two year build. The diff is really the kicker, I need to choose before I pick a diff, as I wouldn't use a 2.93 for DSP, obviously. I don't think I'll be competitive even regionally in STX with an open, and with Todd Roberts in the club, not even in the club. Todd's been top 2 to 5 in PAX almost every event, but just toasted his MS3's motor.

But I'm thread jacking, sorry.

Last edited by MurphysLaww; 04-15-2013 at 02:49 PM.
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Old 05-15-2013, 10:48 AM   #127
wanganstyle
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Originally Posted by MurphysLaww View Post
Wish you were selling these in the U.S.

That said, the amount of work makes it look like it would still be pretty expensive.

I race in SCCA Solo (autocross) here in the U.S. and would like to stay in a class that uses street tires, but the class I want to stay in allows aftermarket diffs, but they have to retain the street car's original ratio, which for me, is the 2.93.

No one that I'm aware of makes a 2.93 ratio LSD. This is due to the ring gear size, I guess?

Anyway, if you have any ideas as to getting a 2.93 LSD build relatively reasonably, say, under $2k U.S. let me know.

Nice work. I wish I had half those tools and one tenth of the knowledge.
Both units were built in Northern California at an international clients request;
All labor/materials/machine work is proudly USA -SF BAY AREA

I made a 2.93 LSD unit for e39 non-M to handle a Technica Motorsports turbo built engine (s52 with double vanos installed) and TRM turbo kit.
A 2.93 LSD unit for e46 would be easy to do - I have precision digitially milled e46 housings waiting for custom orders.

If one is going for autocross setting a set of ramps in 60/30 or 70/30 or 80/20 Accel/Deccel setup would be popular; I do small runs of Custom EDM machined ramps for serious racers with something special in mind
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LSD dreamers thread

http://forum.e46fanatics.com/showthread.php?p=14989087
WSG Billet CNC LSD production Development
http://forums.bimmerforums.com/forum...pdate-backdate
S54B32+E36 1997 M3 Sedan+DTA S100 alpha N
http://forums.bimmerforums.com/forum....php?t=1437471

Last edited by wanganstyle; 05-15-2013 at 11:15 AM.
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Old 05-15-2013, 12:40 PM   #128
Llink78
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Originally Posted by wanganstyle View Post
Both units were built in Northern California at an international clients request;
All labor/materials/machine work is proudly USA -SF BAY AREA

I made a 2.93 LSD unit for e39 non-M to handle a Technica Motorsports turbo built engine (s52 with double vanos installed) and TRM turbo kit.
A 2.93 LSD unit for e46 would be easy to do - I have precision digitially milled e46 housings waiting for custom orders.

If one is going for autocross setting a set of ramps in 60/30 or 70/30 or 80/20 Accel/Deccel setup would be popular; I do small runs of Custom EDM machined ramps for serious racers with something special in mind
So when are you taking on work for the e46 community and i happen to need a 2.93

Last edited by Llink78; 05-15-2013 at 12:41 PM.
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Old 05-15-2013, 01:29 PM   #129
wanganstyle
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So when are you taking on work for the e46 community and i happen to need a 2.93
Perhaps at special request


Its not really economical to build on a large scale; at least on a production level standpoint.

Buying a wavetrac and DIY-ing the install if you dare would be less than having a full billet unit created and setup.

Sadly there is no hallibrand quick change plug and play avail.
__________________

LSD dreamers thread

http://forum.e46fanatics.com/showthread.php?p=14989087
WSG Billet CNC LSD production Development
http://forums.bimmerforums.com/forum...pdate-backdate
S54B32+E36 1997 M3 Sedan+DTA S100 alpha N
http://forums.bimmerforums.com/forum....php?t=1437471

Last edited by wanganstyle; 05-15-2013 at 05:25 PM.
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Old 05-26-2013, 07:16 PM   #130
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Just Woa.. That is seriously knowing your stuff. and being well equipped as fudge!

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Old 07-07-2013, 08:02 PM   #131
wanganstyle
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here is the install setup with gear installed into a non-modified E46 case; no grinding is required with the 3 piece design.
All ring gear bolts must be installed and torqued on the center section first, the top cap on the passenger side is the last piece into the case.



The 6mm bolts are high grade and assembled through the right axle opening; a long T handle ball head 6mm helps getting them all in
Shift/rotate the unit carefully to use torque to 32 Ft-Lbs.

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LSD dreamers thread

http://forum.e46fanatics.com/showthread.php?p=14989087
WSG Billet CNC LSD production Development
http://forums.bimmerforums.com/forum...pdate-backdate
S54B32+E36 1997 M3 Sedan+DTA S100 alpha N
http://forums.bimmerforums.com/forum....php?t=1437471

Last edited by wanganstyle; 07-18-2013 at 12:01 AM.
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Old 08-10-2013, 09:51 PM   #132
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OK, why on earth are people so focused on using the E46 housing in the first place? All I keep thinking to myself is use a modified E36 subframe or a modified E46 M3 subframe and just use the entire unit from an E36. Screw the damn E46 housing - it's not worth the headache or the time. $3,000 just to put a LSD in your car? You could have a fab-shop make you an entire custom rear subframe for half that. This is assinine. I wish I saw this thread a few hours ago before I blew my whole paycheck, you can get E36 rear subframes for less than $100. At least I know what my money is going towards next week.

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Old 08-10-2013, 10:06 PM   #133
imae34driver
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I have an lsd unit that fits the housing 300$ shipped laying around???

Id imagine there is many options that are cheaper then

I cant imagine spending 3000$ ???? For a diff? Thats incredible
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Old 08-10-2013, 10:23 PM   #134
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OK, why on earth are people so focused on using the E46 housing in the first place? All I keep thinking to myself is use a modified E36 subframe or a modified E46 M3 subframe and just use the entire unit from an E36. Screw the damn E46 housing - it's not worth the headache or the time. $3,000 just to put a LSD in your car? You could have a fab-shop make you an entire custom rear subframe for half that. This is assinine. I wish I saw this thread a few hours ago before I blew my whole paycheck, you can get E36 rear subframes for less than $100. At least I know what my money is going towards next week.
If you get this figured out in the next few months. I know im down for a cheaper LSD option.
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Old 08-12-2013, 04:07 AM   #135
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OK, why on earth are people so focused on using the E46 housing in the first place? All I keep thinking to myself is use a modified E36 subframe or a modified E46 M3 subframe and just use the entire unit from an E36. Screw the damn E46 housing - it's not worth the headache or the time. $3,000 just to put a LSD in your car? You could have a fab-shop make you an entire custom rear subframe for half that. This is assinine. I wish I saw this thread a few hours ago before I blew my whole paycheck, you can get E36 rear subframes for less than $100. At least I know what my money is going towards next week.
Well the original purpose of this thread was to fit an E36 diff in an E46 housing with little to no modification. So the cost creeped from like $500 to $3k.

I agree a modified subframe at this point is the way to go, if it's not too expensive.

This seems worth investigating:

http://forum.e46fanatics.com/showpos...&postcount=181
http://forum.e46fanatics.com/showpos...&postcount=186
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Old 09-05-2013, 01:32 PM   #136
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Old 10-28-2013, 09:32 PM   #137
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@Wanganstyle, if you're still around I'd like to talk to you about an LSD for my ZHP. Although the OS Giken site lists a unit for the 330Ci, as you know the regular 330 has a 2.93 ratio, while the ZHP has a 3.07 ratio. I'm not sure I'm allowed to change the ratio in my SCCA Solo STX class.
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Old 10-28-2013, 09:58 PM   #138
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No, you can't change ratios in STX.

I have a full STX kit I'm looking to sell as a package, including a 3.07 LSD diff, pop me an email if you're interested.


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Old 10-28-2013, 10:52 PM   #139
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@murph1379, thanks for the STX clarification. I'm not interested in a package right now, just a clutch-type LSD.
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Old 10-29-2013, 05:02 PM   #140
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No, you can't change ratios in STX.

I have a full STX kit I'm looking to sell as a package, including a 3.07 LSD diff, pop me an email if you're interested.


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You are allowed to install equipment that was optional, aren't you? Not sure how that'd work with say.. a 3.38 or 3.64 diff (both of which were technically optional)
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