3.07 final drive Torsen LSD for e30

[Wanganstyle]

Pondering changing my gearing to a 3.15 (going to build one up this week) and will be selling the 3.07 torsen currently in my car.

It's a complete original bmw factory lsd from 2002 z3 3.0 5 speed; 68k miles + (been in my e30 last 3,000 miles).

3.07 final drive + torsen LSD; 188mm medium case for 6 cylinder cars

This will also plug and play into 4 cylinder e30's; many write ups on this!

Its currently installed in my e30 325.

Sf bay area locals welcome to drive it, I can show you how well it works:)

This is ideal as torsen LSD does not wear out!! It does not break either. It's a genuine bmw built Belgium zexel unit.

Ideal for s50/52 swaps that need more traction and an LSD; a modern torsion unit will cost less and last much longer than the traditional clutch LSD.








ITEM IS SOLD.

[ck_taft325is]

Fuck me, that would be perfect in a 24v E30. Specifically, my 24v E30. Best of luck with the sale. To much on my plate right now ;)

[Mossman]

I'm rocking a 3.15torsen behind an S52 and a G260 and i love it.

[phreshkid]

I too am rocking the s3.15 with an m52/zf and I think it's perfect.

[Wanganstyle]

Fuck me, that would be perfect in a 24v E30. Specifically, my 24v E30. Best of luck with the sale. To much on my plate right now ;)

word up, thanks for the kind words!

[Wanganstyle]

bump. for serious only !!!

[Supadave]

;)bump, cuz its cool

[Supadave]

Just for you guys wondering what a torsen diff is.

uattro, Quaife, Torsen, Peloquin: (Torque Biasing Differentials)
Audi's Quattro (Audi's marketting name for all their AWD systems) using Torsen and the popular aftermarket Quaife systems use a set of worm gears inside the differential in place of the simple bevelled spider gears, which bind up when there's a resistive torque imbalance. That means, as long as both sides show equal resistance then they are free to rotate at different speeds, such as when going around a turn.
The whole thing is often called a "Torsen" system as in "Torque Sensing" (Torsen is actually a registered trademark, and the more generic term is Torque Biasing Differential or TBD) because it instantly reacts to torque imbalance transferring torque to the wheels that can use it most. There's a difference between the two main types of torque biasing diffs. Quattro's Torsen diffs used something developed by Gleason called invex gearing which is is really all about worm gears. A torque imbalance causes it to *try* to turn the low traction output shaft faster than the higher traction side, but that would cause the invex spider gears to turn, and they drive worm gears which have a greater mechanical advantage (due to the angle of the teeth) than the output sun gears have on the worm gears. That means that a multiple of the torque that would have gone to the low traction side actually goes to the high traction side. So if 20 ft-lbs of traction is at the low traction side, something like 80 ft-lbs goes to the side that can actually use it. A ratio of 4 to 1 or 5 to 1 is common but changing the gear teeth angles changes the ratio. The Quaife unit uses helical gears to accomplish very much the same thing, but the actual operation is not nearly as easy to understand. The helical gears float in pockets on the inside of the housing and apply radial and axial forces generated by the angle of the gear teeth. It can be tuned just like the invex gears to vary the torque ratio. Note however that without significant preload either torque biasing diff will not work well with a wheel completely off the ground. 0 ft-lbs time 4 is still 0. A simple braking trick helps though. (Note, the EDL system discussed above, actually works pretty well with a torsen diff. It activates rarely, but allows for much greater torque transfer when it does.) For this reason, they're rarely found on offroad 4x4 vehicles, the notable exception being the original Hummer H1, which has a note in the owner's manual explaining how to use the brakes and gas at the same time, should one or more tires be off the ground (as is not uncommon while offroading).

It is capable of going from an open differential to say 60% locked differential condition absolutely instantly (zero lag), so many would argue that it's about as close to perfect as it gets for performance driving. There are no clutches to wear out. Several AWD systems like the Audi Quattro system put a torsen diff in the center of the car to control slip between front and rear wheels. This system does not have the problem the VC does with the ABS. A torsen diff only distributes torque when it's under load. When it's freewheeling all the wheels can turn at different speeds as the ABS may desire.

[ACHTUNG]

Thanks for the explanation.

Now I want this even more. Decisions, Decisions...

[Wanganstyle]

Thanks for the explanation.

Now I want this even more. Decisions, Decisions...

If your goal is handling for street/hpde car, torsen is pretty much the ticket.

Clutch diffs are ancient monsters; I build them all day yes, they put down faster lap times for stiffly sprung track only cars but really does not handle like a Torsen does- makes u go crazy WOT every corner exit because you can really use the torque transfer- feel similar to driving a FWD car with Torsen like a Prelude SH with the ATTS system

S2000 - Torsen
Rx7 FD3S - Torsen

Many other beautiful FR sports cars use it also!

[Supadave]

Only if i could find a 3.23 like this...

[Wanganstyle]

Only if i could find a 3.23 like this...

PM me if you are serious......I recently built a 3.64 Torsen for a 4 digit rwhp local drag car :D

[Supadave]

Pm'ed

[Wanganstyle]

bump. 3.07 avail!

[Edev]

It's what I have in my Z, and it's great. Extra bump for you.