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Complete limited slip differential BMW 130i 3.46 188L

Exchange original diff

Fitting oil drain plug

LSD type

Ratio

1.222,52
(Price excluding VAT): 1.010,35
Stock:
1 Items
Item No.:
130i_3.46_sperdiff

Complete limited slip differential BMW 130i 3.46 188L

Rebuilt 130i differential with new LSD. (3-series is different)

Completely overhauledBMW differential with new locking clock installed. The standard differential is sensitive to problems with the bearings, this was immediately remedied by the rebuild with stronger bearings than original.

PG Torsen

This is a Toren limited slip differential. The operation consists of worm gears that ensure that when 1 wheel slips, the other wheel is also driven. When 1 wheel then slips 3 laps, the other wheel will be driven at least 1 lap. There is no blocking effect on throttle off. So it is a big improvement compared to no lock at all, but slightly less in terms of performance than a plate lock differential. 
Performance: 3/5
Strength: 3/5
Durability: 4/5

Quaife Torsen

This is a Toren limited slip differential. The operation consists of worm gears that ensure that when 1 wheel slips, the other wheel is also driven. When 1 wheel then slips 3 laps, the other wheel will be driven at least 1 lap. There is no blocking effect on throttle off. It is therefore a significant improvement compared to no lock at all, but slightly less in terms of performance than a disc lock differential. The steel is of high quality.
Performance: 3/5
Strength: 4/5
Durability: 4/5

Gripper LSD

This is a classic disc limited slip differential made from high quality steel and has a high quality finish. The time limiter is available in various settings such as street use or circuit/competition use. The Gripper LSDl is very strong and has a lifetime warranty. The barrier plates do need an overhaul over time. With competition use this can be the case after two seasons, on public roads it can last for years. This strongly depends on the type of use.
Performance: 4/ 5
Strength: 5/5
Durability: 3/5 (due to the wear of the barrier plates over time)

OS Giken Superlock

The OS Giken superlock is a disc lock, as all BMW motorsport users prefer, but has major advantages over a traditional disc lock. For example, there is up to 100% locking percentage and virtually no wear due to the multitude of locking plates. With a normal disc lock differential, the locking effect weakens over time due to wear.
Normally 100% is not desirable, this has the disadvantage that the car is more difficult to steer because the wheels no longer want to turn independently. However, with an OS Giken this works differently because (unlike a normal disc lock) there are extra central springs in the diff that counteract the locking effect. This means that during quiet driving or parking there is little locking effect, but when accelerating this builds up to 100%.
This versatile system gives you the best setup for both road and track, no compromises needed.
Performance: 5/5
Strength: 4/5 (because the OS Giken is slightly smaller than the Gripper at this size)
< div style="background:#eee;border:1px solid #ccc;padding:5px 10px;">Sustainability: 5/5

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Adjusting the ratio affects the RPM. A higher ratio means significantly better acceleration but you sacrifice some comfort (because the engine revs up).

Theoretical top speeds in 6th gear at 6600rpm:

3.46 = 269km/h (standard original ratio)

3.64 = 256km/h

3.73 = 249km/h

3.91 = 238km/h

4.10 = 227km/h

Go to 'Additional information' below for english.

Completely rebuild differential with new LSD core. The OEM differential is sensitive to premature bearing failure. By rebuilding this differential with stronger bearings you don't have to worry about this issue anymore.

PG Torsen

This is a good base model to start with. The system works with gears only, and if 1 wheel loses traction and starts spinning, the gears will work and have the other (gripping) wheel turn too. For instance when 1 wheel slips 3 turns, the other will turn at least 1 time. On deceleration it works like a normal (not LSD) differential. Also with 1 wheel completely gripless, one ice or in the air it works like a normal differential so no locking. Despite these drawbacks it's a major upgrade over an open (not LSD) differential. BMW uses the torsen system in some of their models too.
Performance: 3/5
Strength: 3/5
Durability: 5/5

Quaife Torsen

This is a good base model to start with. The system works with gears only, and if 1 wheel loses traction and starts spinning, the gears will work and have the other (gripping) wheel turn too. For instance when 1 wheel slips 3 turns, the other will turn at least 1 time. On deceleration it works like a normal (not LSD) differential. Also with 1 wheel completely gripless, one ice or in the air it works like a normal differential so no locking. Despite these drawbacks it's a major upgrade over an open (not LSD) differential. BMW uses the torsen system in some of their models too. The LSD is made with high grade steel.
Performance: 3/5
Strength: 4/5
Durability: 5/5

Gripper LSD

This is a traditional clutch based LSD. It's the same system which was used on E30 M3, E39 M5 and so on. You can order it with a certain locking % like 25% or 50%, whatever seems best for the job. So for road use it would be different than rally use. It's used in modern race cars all around the world and the LSD is very strong. It comes with lifetime warranty. The clutchplates will need overhaul after some time. With competiton use this might be every 2 seasons, with road use you might be good for years. Ir really depends on the type of use.
Performance: 4/5
Strength: 5/5
Durability: 3/5 (because of clutches wearing out over time)

OS Giken LSD 

This is like the traditional LSD, but with an additional technique. It has a clever spring system which pulls the LSD out of locking. So when you drive slowly the LSD will not lock (hard) but when you accelerate hard it overcomes the spring power and has the potential to lock to 100%. This LSD has the best performance, there's no need to set it up differently from road use to rally use. And the clutches are not coated, which means with good circumstances you will not wear them out.
Performance: 5/5
Strength: 4/5 (because the OS Giken in this particular size is a bit smaller than the Gripper)
Durability: 5/5

Adjusting the ratio affects the rpm. A higher ratio means a significantly improved acceleration, but a bit less comfort (because of the higher rpm).

Theoretical top speeds in 6th gear with 6600rpm:

3,46 = 269km/h (original ratio)

3,64 = 256km/h

3,73 = 249km/h

3,91 = 238km/h

4,10 = 227km/h

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