Anyone know the difference in these two models? According to the website, the two have different ways of locking up, from what I understand.

The RS model seems to be a popular one on the forums as this is all I saw when I searched. Any input or reason why everyone goes with the RS Type?

 

RS and MZ is identical except for the RS uses helper springs to initiate the lockup to the cone plates where the MZ locks up the plate directly.

Difference? smoothness in engagement.

 

The RS doesn't use cone plates, just regular clutch discs. The springs apply a small amount of preload and that makes the transition smoother on the RS. The MZ uses two cone friction plates similiar to the Auburn Gear type LSD's for a higher bias ratio than the RS, making it more suited for higher hp cars, albeit with a rougher engagement. The RS is identical to the NISMO unit and would be my recommendation.
Will

 

No the RS is not identical to Nismo. the Nismo is more identical to the MZ and it is worse than the MZ as it does not have Oil Through system to keep the LSD cool.

The RS and MZ uses the same Clutch Plates, sorry not cone plate, typo.

Here is a diagram.




I've already sold two of the Type RS's on this site.

 

Thanks for the info all. If the MZ is more suited for high HP cars, should I not put it in my car? I dont plan to go FI so perhaps its a waste to install if I'm not going to use it to it full potential. What do you guys think?

 

get the type RS.

 

here are the differences:

http://www.z1auto.com/prodmore.asp?m...ine&prodid=518

there is no difference in the amount of power they can take. For what its worth, we've never sold an MZ diff for a Z to date, though we've sold about 15-20 of the RS rear diffs. I've run the RS in my car since 2003, and to date it remains the best overall mod I ever did (my car had a stock viscous limited slip, which was awful)

The RS is not the same as the NISMO at all - in fact, the NISMO and the MZ are the same unit.

 

Thanks for your input! But now I'm on the fence about selling it! Since I got the MZ for a really good price, I'd hate myself if I sold it, found out later that I should have kept it and pay more for it. Whats the average cost to install an LSD anyway?

 

u need the bearings and seals for parts which i'm selling btw. and if urs is base model without LSD, u'll need lsd axel stubs as well. labor is $150 typically if u take the pumpking to them. if they have to take off, it's another 100-150

 

As far as the NISMO and the Cusco units, last I checked the NISMO uses standard alternating clutches and preload springs, just like the RS. It does not use Conical clutches like the MZ. As far as which might hold up to more power, the very use of conical clutches means it will have a higher bias ratio than the RS. This is the very reason cone clutches are used in off road diffs by Eaton, Auburn Gear, etc.. for high torque trucks. I still say the RS is better for our car than the MZ, and since the NISMO is the same as the RS and it comes with the stub axles, I think if it can be had for around the same price as the RS it would be the better deal.
Will

 

I have a Track model that comes with a vlsd. Can I reuse the bearings and seals from that? Also regarding install time, how long does it usually take?