I know that Quaife does not make an LSD for the 350z but does anyone know of another company that makes an LSD that is not viscous or a clutch disc design?

 

There are currently no helical / Torsen-types of diffs for the Z33 at the moment... only clutch-types...

 

Cusco makes 2 types of LSDs

 

If you want streetable without a lot of noise and maintenance hassle, what's the best option? I'm guessing the nissan viscous LSD, but I know that's not very strong. The Cusco sounds good performance/wise, but doing a lot of LSD oil changes and hearing grinding or popping noises in the parking lot don't sound like fun. Are the helical/torsen clutches a good combo of strong and streetable?

 

someone on this forum has a kaaz 2-way....said its not that bad noise-wise

 

That would be me. No, the noise is definitely not bad at all.

Put it this way; I taught my girlfriend stick on the car with the LSD on and she had no problems.

The question I have for you is what you plan to be doing with the car? If you won't be tracking or drifting the car, you might as well stick with the viscous LSD that comes standard.

If still want an LSD, your best bet is the Kaaz 12-plate, rather than a Cusco or Kaaz 24-plate. Those are far too aggressive to be streetable. Active Traction Service is supposed to be coming out with a carbon fiber clutch LSD that is super-quiet/smooth and doesn't require oil changes every 3-4000 miles but that has been in development since winter.

 

I just want a very reliable LSD that I don't have to worry about wearing out when I do my autocrossing. Quaife will be ideal but they say they have had no interest from Z owners in having them build one. I find this pretty unbelievable considering the number of Z's and G35's being modified in Japan and North America.

 

ATS are excellant differentials. I ran the deftforce (20 "big" discs) in my rx7. Very harsh for most people. Their diff should be out soon.

I talked with Daytona as well, he seems to really like his Kaaz 12, and says it is very streetable. Most 12 disc style diff's have like a little rumble sound in the back, when driving in parking lots, as if you were driving on rocks...

My Kaaz 24 disc is in the mail and i will let you know how streetable that is. Everyone says it isnt, and most of you would never want something this harsh, but I'll share anyways for comparison sake.

 

Stupid question.... What do you mean by "harsh"? Does the back end feel choppy at slow speeds? What are the signs (complaints) about an LSD that is "not streetable"?

Ian
- still learning

 

So, my stock Nissan diff makes a resonating hum around 45mph.

Has anybody else experienced this? This is a key reason that I've been tempted to switch up to a torsens if one became available.

 

I wonder how good the NISMO unit is.

 

I have the immensely intimidating one wheel mark when burning out LOL

 

When making sharp turns with no power imput, the diff will "slip" and its basically the clutch discs "popping and locking" they have an insane clamping pressure on them, the more disc's the more pressure. And when power is applied, they pressure is so high that it does not unlock.

My deftforce in my rx7 in a parking lot felt like someone was hitting my diff with a sledgehammer when moving around. Or if you give like 1/3 throttle, the inside wheel would lock up and it would chirp and squeal around the turn. Even on exit ramps my car would pop if no power was applied (but in gear). But if you take it out of gear... it just makes a low rumble noise that most people can deal with.

 

what type is the nismo unit? 2-way? clutch-type?

 

That is not what we are talking about. You might want to check your diff fluid level, that sound is coming from you gears most likely, not your differential.

 

Nismo GT Pro LSD is a clutch-type, adjustable between 1.5-way and 2-way. If it's anything like the LSD for the S14 and S13, it's about as aggressive as the Kaaz.

I've found the best way to avoid the LSD pop is to just use less amount of throttle when making a sharp turn. That prevents the plates from locking up. Also, using a high-quality oil such as Kaaz or Redline makes the unit as smooth as possible. Adding GM's LSD additive will help if the noise still bothers you too much.

 

I want to go FI, so I want the extra traction of two drive wheels working for me, but I really don't want the popping noises, or the need to change the oil so often like on a clutch LSD. Is the stock LSD strong enough to take FI power to the rear wheels, and is it installable on a base model?

 

Well, it's not from the transmission, it's definately from the rear of the car. It could be from the final drive gears, versus the actual viscous plates. *shrug*

 

Thats what i meant... the gears in your diff...

 

can a stock lsd be installed on a base model?