300zx, viscous lsd:good or crap

hello all im looking at weather to use a 300zx/z31 viscous lsd or a s13 mechanical lsd i think the zx would be any easyer project but that doesn\'t matter just want to know witch one is the better unit
thanks
tim

By all evidence a mechanical LSD will always be preferable and better in performance to a Viscous LSD.
You also have to take into account factors like which one is easier and economical to fit in your situation when decidng.

The R31 and Z31 are clutch LSD except for the Shiro Special Z31 which is viscous. And yes Clutch is always better than Viscous LSD. The drift king said it well...when a clutch LSD starts wearing out, it feels like a fresh rebuilt viscous unit.
 
To avoid confusion between 2 threads, hte Z31 with the good diff is the MKII Z31 turbo, and the R31 which in NA is the Infinity something (J30 or M30 or something like that), and it came with the VG30

modified clutch and viscous lsds seem to work quite wll apparently.

hi all gonna put an lsd in my car soon an dont want to go the 300zx viscous and cant find any 300zx mechanical units in vic so was thinken of importing a skyline r32,33,34 lsd in to aus with my ca18det half cut, any body know what the half shaft splne od is and how many slines or if it the same as s12?i recon i could make the mounting brackets fo the short nose r200 easy enough and lengthen tail shaft but dot know abou the half shafts so any help would be great :-P

If you\'re gonna go to all the trouble to import it, then why not do the easy part and just put the LSD into your case? So long as you have the same style ring gear (10mm or 12 mm), all you have to do is swap the ring from your open diff to the LSD. I would have it set up at a shop to be sure it is correct (unless of course you have the tools and knowledge to do it yourself).

 
It\'s actually fairly simple to swap if you have access to air tools.
 
The only thing you really need to worry about will be the halfshaft inputs. And from what I\'ve read you can even have the input from the doner car intergrated onto your existing shafts. I know this has to be done at a driveline shop, but it may be your best bet.
 
Just my thoughts.