2 way rear diff?

[aris_unlimited]

I was looking at this 2 way rear diff http://www.intensepower.com/totetr20wayl.html and noticed that it says it is only for 350z w/ factory lsd. Does anyone know if it will actually work with a base models rear diff that doesn't have the factory lsd?

[BusyBadger]

You need the output shafts from the factory vlsd.

[aris_unlimited]

In that case I will look at some of the cusco lsds. They don't say anything about needing factory lsd. I noticed they have a couple that are 2 way. So I will just talk to the store to confirm that, and look into getting one of those.

[BusyBadger]

Why are you getting a lsd? If its for a street car that won't see track time (especially drift) but instead just needs a traction boost you may want to consider a helical lsd from Quaife. They're more expensive on the font end but are nearly transparent in operation and have nowhere near the maintenance needs of a conventional clutch type lsd. They are also made specifically to work with the open diff from the base model, users with the factory vlsd need the output shafts from the open diff.

[aris_unlimited]

I am getting it mostly for street applications, although later down the road it may see some track time. I am planning on doing some upgrades to improve hp, but I don't think I will go over 500 hp when all is said and done. And I found a guy that is using one and he has over 600 hp so it should be durable enough for me.

What kind of maintenance would a clutch type lsd require? Just curious about the maintenance because the cheapest I have found the quaife is about $500-600 more than a clutch type.

[JETPILOT]

Why do you want a 2 way lsd. You'd be much happier with a 1.5 way on the track and street unless your a hardcore drifter. If your looking for an LSD look into the OS Giken. It's the best out there for the Z. Satay away fro mthe Quaife for track use. The only maintenance for a clutch LSD is an oil change when specified.

[BusyBadger]

Jet - I'm curious to know what your thoughts are (if you've driven with it) of the ATS/Carbonetics Carbon LSD. Its what I plan to replace the stock viscous unit with when the time comes (on the Z and maybe on the S13). For a tracked dd it seems a better choice because of the lower noise and the longer lifespan of the clutch plates.

I'm also wondering what your objections to the Quaife atb diff are. It would never be my choice for a drift car but for any other track event where the possibility of getting a zero traction wheel is unlikely it seems a great choice. The zero maintenance and the lifetime warranty make it even more appealing.

[JETPILOT]

The ATS requires alot of fluid changes due to contamination from the carbon. You also must use their gear oil.

The Quife if you lift a wheel in a turn the differential becomes an open differential. Quaife differential like to be run with the cars roll center moved to the front of the and the suspension run loose in the rear to prevent lifting that inside read tire. The Quaife requires being more concious about what is going on with the chasis than I like to pay mind to. You will have to adjust your driving style.

The OS Giken is the diff everyone is using in the Super GT series 300/500 cars. It's a great differential.

[aris_unlimited]

Is there any kind of maintenance regimen with the OS Giken?

And will the OS Giken work in a base 350z's rear diff?

[redsx13]

I have a kaaz 2 way on my 240sx, an believe me, you dont want on your z. I wouldn't even put one on my z. If you still insist on getting a clutchtype, atleast go with a 1.5 way. you will thank me later.

[aris_unlimited]

what is wrong with a 2 way?

[BusyBadger]

Besides locking the rear wheels under acceleration when you begin to lose traction it will also do this under DE-celeration. Its not something that most drivers have ever experienced and/or had to deal with.

If you go into a turn too hot and lift the throttle with a 2 way you're going to spin. A 1.5 will lock under decel but it will do this at a much lower level so its not as much "work" to drive and safer on the street for most drivers.

[aris_unlimited]

Interesting. I did not know that. 1.5 it is lol

[C-Kwik]

The Quife if you lift a wheel in a turn the differential becomes an open differential. Quaife differential like to be run with the cars roll center moved to the front of the and the suspension run loose in the rear to prevent lifting that inside read tire. The Quaife requires being more concious about what is going on with the chasis than I like to pay mind to. You will have to adjust your driving style.

While the technical aspect of your take on a helical diff are correct, the Z really should have no problems with lifting a rear wheel if set up with any reasonable decency for road racing or street driving. If you shifted the roll couple distribution to the rear enough to cause a rear tire to lift, then you'll likely be paying a whole lotta mind to what the chassis is doing. Which is precisely what you said you don't want to have to do.

I would not worry about the effects of the rear tire lifting on a Z as the possibility of an occurance are pretty unlikely with any reasonable road race/street set-up.

[redsx13]

aris_unlimited, im glad you decided not to go with a 2 way, if a may make a suggestion, you would probably want to go with a Quife, if you want a really good diff for road racing, its worth the extra cash.

clutch types are reliable, but they will not last, it recommended to replace the clutches in your diff every 5,000 track miles. not to mention the periodic diff fluid changes in between that. And that oil is expensive!

[spitalul2bad]

I was looking into getting a 1.5 diff and 3.9:1 gears set at the next paycheck... I was going to go with the Quaife thanks to its NO MAINTENANCE policy.

I don't track the car regularly and only want good acceleration and a sliding back-end once in a while. The car is the "REV-UP" model. Don't know what trim, so don't know if I have the basic rear-diff set-up at all. I do know I have the BOSE, Brembo and leather options. It's a convertible and I'm keeping it N/A.

If I'm making the wrong diff choice with the Quaife please advise. Remember that I want to do as LITTLE maintenance on it as possible. Thanks.

[BusyBadger]

If you've currently got an open diff you're all set to go. If you've got a VLSD you're going to need the output shafts from an open diff to run the Quaife.

[aris_unlimited]

I do know I have the BOSE, Brembo and leather options. It's a convertible and I'm keeping it N/A.

With those options I would have to guess that you do NOT have a base model. And only base models have the open diff. If you also have cruise control then it is even more likely that you already have the stock vlsd.

[redsx13]

If you've currently got an open diff you're all set to go. If you've got a VLSD you're going to need the output shafts from an open diff to run the Quaife.

If you have a vlsd you also dont need to be spending money on a diff.

[spitalul2bad]

Yes, the car has cruise control.

So that means I have the VLSD... And that in turn means I don't need an aftermarket diff?... hmm...

Have I got this right?

[BusyBadger]

Need is a relative term.VLSD's do wear out over time and they certainly up to the task of constant track use. But you're car is fairly new, so unless you're having loads of traction problems you're probably fine for right now. If you are having problems with traction I'd personally go with better (newer) tires before I went with a new diff, the aftermarket LSD won't help out a bit if you're tires can't get any grip.