Blackline BMW 188K Diff

E70,E82,E83,E85,E87,E89,E90,E92,F10 

Helical LSD for vehicles fitted with 188K differential.

Suits:-

E38 728i Auto

E39 Manual - 520i, 523i 525i med 3,15:1 utväxling
( E39 525 med 3,15:1 är verifierat och monterat av oss på H2M Racing )

E39 Auto - 523i, 530i

E46 Manual - 320i (with 188l casing), 325i, 325ti, 325xi, 328i

E46 Auto - 318d, 323i, 325i, 328i (3.46: ratio), 330i

E53 Manual Rear Diff - X5 3.0i

E53 Auto Rear Diff - X5 4.4i, X5 4.6is

E60 Manual - 520i

E60 Auto - 520d, 520i, 525i, 535i (SMG), 530i , 535i, 535xi

E63 630i Manual & Auto

E70 X5 3.0d Auto Rear

E70 X5 35ix Rear

E82 Manual - 125i, 128i

E82 Auto - 123d, 125i, 135i

E83 Manual Rear Axle - X3 3.0d

E83 Auto Rear Axle - X3 2.0d

E85 Manual - Z4 2.5i, Z4 3.0si

E85 Auto - Z4 2.5i, Z4 3.0si, Z4 2.5si, Z4 2.5si (SMG), Z4 3.0i

E85 Alpina Z Roadster S 3.4

E87 Manual - 130i

E87 Auto - 118d, 120d (03/07 - 09/08), 123d, 130i

E89 Manual - Z4 sDrive 23i

E89 Auto - Z4 sDrive 23i, Z4 sDrive 30i

E90 Manual - 320d (with final drive 7591074), 320i (with 188k casing), 325i (with final drive 7591015), 328xi, 330i

E90 Auto - 320d (with final drive 7591017), 320i (with 188k casing), 325i, 328i, 330i, 335i (with final drive 7572055), 335xi

E92 Manual - 325i (with final drives 7529109, 7591015), 328i, 330i

E92 Auto - 320d (with final drive 7591017), 325i, 328i, 330i, 335i (with final drive 7572055), 335xi

F10 Manual - 535i

F10 Auto - 535i

Helical LSD Advantages:-

Equal rotational speed to both wheels

Torque distributed according to traction

Minimal service requirements - no clutches

Quick reaction compared to viscous LSDs

Gentle and progressive engagement, low noise

Easily controlled power take-off and drifting

Gears and body manufactured from 8620 alloy steel

Direct replacement into stock differential

Blackline Helical LSD's - How They Work

The Blackline helical LSD's are torque biasing, that is they distribute torque between the wheels, loading more torque towards the wheel with the best traction thus improving performance and driveabitily. Especially in low grip situations.

The helical gearing manages the distribution of friction within the LSD. When torque is applied to the helical gear system it creates force that pushes the gear into the differential body, thus creating friction. Increases of torque, increases the thrust force directly proprotional to the amount of torque. This allows the Blackline LSD to cope with considerable traction imbalance even under heavy power conditions, as would be the case on exiting a powered up corner. But at low torque conditions the LSD can differentiate quietly and smoothly, thus making the differential very suitable for normal road driving. The Blackline LSD uses the popular parallel axis helical geared configuration optimised for even load distribution. They are designed with a torque bias of 5:1 this means that if one wheel loses traction then the wheel with the most grip can receive five times as much torque as the wheel that is slipping. However, five times zero is still zero, so all these helical LSD's work best when both wheels are 'planted' and some traction is still available on the slipping wheel. In practice this is rarely a problem as there is always some 'drag' on the slipping wheel, however some drivers expertly use left foot braking to partially lock the spinning wheel.

Note - Helical LSD's work especially well when combined with modern anti-lock braking systems.