Kaaz Limited Slip Differentials are renowned in the motorsport community for being rugged, reliable and ready to go out the box.
This diff can be supplied as standard, or as an updated SuperQ unit. The SuperQ range feature treated low friction plates which benefit from quieter and smoother performance. As well as this, SuperQ units benefit from longer plate life span, increased heat dissipation and don’t have a break-in period.
Specifications
- Torque 5.5-8.5 Kg/m
- Ramp angle 25/45
- Cone Springs x2
Plate Type Diffs
Plate type Limited Slip Differentials (LSD) use plate packs (sometimes called clutch packs) to effectively lock the entire rear axle under load.
It does this by using a cross pin and a ramp ring. The cross pin is a long cylindrical pin that sits in the middle of the diff between either one or two ramp rings.
These ramp rings have literal ramps machined into the side, when under load the whole ramp ring rotates causing the ramps to ride up against the cross pin, forcing the rings apart. As these ramp rings are forced apart, they push several friction plates together on either side of the diff.
This essentially acts like a clutch, but instead of applying the clutch to a moving shaft, it applies it to a stationary plate until there is enough friction between the plates to momentarily lock the diff.
What does 1.5 way mean?
LSDs come in 3 different “ways”, 1-way, 1.5-way and 2-way. This has to do with if the diff locks under acceleration, deceleration or both.
A 2-way diff is capable of locking under both acceleration and deceleration. It does this by having exactly the same ramp angles for both acceleration and deceleration.
1-way diffs are only capable of locking under acceleration. This is the “kindest” type of LSD and is normally only used for fast road driving.
A 1.5-way diff aims to find a middle ground between the two by making it easier to lock the diff under acceleration and harder under deceleration. This is done by having a lower ramp angle (this is the angle of the ramp that is machined into the ramp ring) for the acceleration side than the deceleration side.
This diff runs a 25/50 configuration (Accel ramp angle / decel ramp angle) meaning it would lock easier and more frequently under acceleration due to the shallow er ramp angle on the acceleration side.
Preload
Pre-load is the amount of pressure that is already applied onto the friction plates before the ramp rings push them together. The more pre-load you have, the more pressure will be exerted onto the friction plates. This means you’ll need less torque from the engine to lock the diff.
Ramp angles
Ramp angles are literally the angle of the ramp that is machined into the ramp rings. Depending on the angle of the ramp, it will be easier or harder for the ramps rings to ride up the cross pin and lock the diff.
Kit Contents
- Kaaz Diff
- Kaaz Oil