Beschrijving
The helical LSD can also be fitted to some of the more modern sporty Peugeot and Citroen models that use the BE4 5-Speed manual transmission.
Applications:-
- Citroen CV4 VTS (177bhp)
- Citroen Xsara VTS
- Citroen BX 16v
- Citroen ZX 16v
- Citroen C4 VTR
- Peugeot 205 1.6 / 1.9 GTi
- Peugeot 206 2.0 litre CC
- Peugeot 206 GTi 180 / 138
- Peugeot 206 GTi & GTi 180
- Peugeot 207 GT & GTi THP 175
- Peugeot 207 HDi
- Peugeot 306 GTi-6 / Rallye / S16 / D-Turbo / HDi
- Peugeot 307 XSi
- Peugeot 307 HDi
- Peugeot 309 GTi / GTi-16
- Peugeot 405 Mi16 / LeMans
- Peugeot / Citroen BE4R gearbox
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
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
The 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 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 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.
