LSD Question

[assassin10000]

zounds Wrote:Hey, can anybody explain me what MZ or RS is?

MZ = harsh engagement - will disengage if no torque is applied

RS = softer engagement - always lightly engaged.

The MZ design is such that as soon as you apply torque/power the plates are creating friction and causing the amount of slippage between the two axles to become less and less with the more torque/power applied. When you are off throttle there is little to NO lsd lock/grip action. The MZ is more of an on/off instant change in traction.

The RS design is always engaged, even off throttle in parking lot manuevers. The springs allow the clutch plates to always have a small amount of engagement so it's not an abrubt change midcorner/throttle control. Much smoother to drive and supposedly better for both grip and drift as it allows smoother footwork/throttle control with less chance of upsetting the balance of the car through abrubt changes in rear traction mid corner/drift (at least from what I gather.)

Both the MZ & the RS use the same clutchplates - overall amount of lock/grip should be equal at full engagment.


I have a 2way RS and I am very happy with it in my ae86. It's quiet, smooth and very good engagement when I apply power.

Note: the only reason an RS would be more noisy than an MZ would have to do with the fluid & amount of friction modifier in the diff. The ONLY time my RS made noise is when I put fluid in without lsd additive/friction modifier. Only backed out of the driveway before I realized I needed to put some in or change the fluid.

Since then I've experimented with different fluids (valvoline, redline, amsoil, mobil1 & lastly Motul) and I find the best fluid with the proper (IMHO) amount of modifier already added is Motul PA90 gear oil. No noise & great engagment with plenty of protection.

Andrew