diffs and diff gears.

[jaffaZ32]

I want to improve the acceleration of my Zed via altering the Diff but...

 

At the same time I also want a better diff so i get more power on the road before the Traction control takes it away.

 

So when buying a new diff, would i also replace the gearing of the diff with a leadergears gears? or can i specify gearing when ordering a new diff?

 

stock gear is 3.69 and leadergears is 4.10.

 

I don't want to fit a NA diff neither.

 

In your opinion who makes the best diff? i know Cusco, Quaife, Nismo and Kaaze make them for our cars

[markzx]

I believe the OS Giken diff sets come in 3 different ratio's

 

Quaife will build you what ever you want.

[jaffaZ32]

oh right, so if i bought a diff i wouldn't need the leadergears kit.

 

Thanking you sir ;)

[taff]

iI go for a tomei /kazz/or cusco 2 way machnical clutch type diff .I dont belive quaife is a clutch pack type lsd.Id leave the gearing as it it just get a propper lsd fitted it will make a lot of diffence especaily when pulling away hard ,may click a bit when turning tightly.

[Slick Pete.]

iI go for a tomei /kazz/or cusco 2 way machnical clutch type diff .I dont belive quaife is a clutch pack type lsd.Id leave the gearing as it it just get a propper lsd fitted it will make a lot of diffence especaily when pulling away hard ,may click a bit when turning tightly.

 

There is no "may " about it... It will click n groan at low speed corners.

Not to mention the fact that if you have it torqued up tight enough to be any real use at full throttle launches then it will attempt to send you straight on a most low speed roundabouts. :shock:

[jaffaZ32]

it will attempt to send you straight on a most low speed roundabouts. :shock:

 

 

:shock: youch, hello Mr roundabout lol.

 

The Quaife one is mechanical based. All cogs.

 

I'll look into those brands then to see what there is availible, thanks.

[markzx]

:shock: youch, hello Mr roundabout lol.

 

The Quaife one is mechanical based. All cogs.

 

I'll look into those brands then to see what there is availible, thanks.

 

John Dixon has a Quaife diff I think. It click clacks for Britain., but he may have some good feed back for you. I've been looking at the OS Giken set ups.

[walksonland]

As I type this I am half way through fitting a Quaife ATB diff and a leader 4.10 crown wheel and pinion. I believe this is the best setup available for sprint / hill climb racing. Doing it all myself it will take me two or three weeks to get it back on the road after that drop me a PM and I will tell you how well it works.

[Slick Pete.]

John Dixon has a Quaife diff I think. It click clacks for Britain., but he may have some good feed back for you

 

Probably a better option due to its torque biasing method of action. Avoids the going straight bit that Salisbury plate types exhibit.

[jaffaZ32]

As I type this I am half way through fitting a Quaife ATB diff and a leader 4.10 crown wheel and pinion. I believe this is the best setup available for sprint / hill climb racing. Doing it all myself it will take me two or three weeks to get it back on the road after that drop me a PM and I will tell you how well it works.

 

How did you get on with this?

 

I can get a Cusco diffs, are they any good?

 

but there are different options, all a bit confusing. Mz and Rs

 

Then you have 1 way and 2 way. i don't get it to be honest.

 

From the supplier

 

"Cusco MZ Type LSD, available in 1, 1.5 and 2 ways. This LSD is most suited to the track, whereas the Type RS is suited to the street.

 

With the Type RS, the initial torque is absorbed by the RS springs therefore the initial torque comes on gently compared to the Type MZ which comes on stronger as it uses cone plates and response of the LSD is better, as the friction is lower.

 

*Lower initial torque *Lower power loss *Reacts well to delicate pedal work *Durable and develops initial torque steadily"

 

 

 

Here is a diagram of the two type of diffs

[John Dixon]

I've got a cusco 2 way on mine.

It does give good traction but you have to be careful with it, no sudden backing off the power etc as it will lock pretty hard. Also, you tend to get a little more understeer which you then have to cancel with a bit more gas. It does clunk and bang very noticably at low speed to and even chirps a tyre when cornering at low speed (junctions mainly).

I'd go for a quaife ATB if they do one for the Z as they are much more forgiving. If you do get a plate go for a 1.5 or 1 way so you get no locking on decelleration, much easier to drive

[jaffaZ32]

I've got a cusco 2 way on mine.

It does give good traction but you have to be careful with it, no sudden backing off the power etc as it will lock pretty hard. Also, you tend to get a little more understeer which you then have to cancel with a bit more gas. It does clunk and bang very noticably at low speed to and even chirps a tyre when cornering at low speed (junctions mainly).

I'd go for a quaife ATB if they do one for the Z as they are much more forgiving. If you do get a plate go for a 1.5 or 1 way so you get no locking on decelleration, much easier to drive

 

Thanks for the info, i will look into the Quaife option.

 

Have you seen this one before it's made by Tomei and meant to be new out and apparently being made in a limited number tomei lsd

 

It's the only one Z1 sells, that must mean something in it's self and they praise it.

 

Also just out of interest is your the RS or the MZ?

[jaffaZ32]

I found the LSD for the 300zx but i've got a feeling it's for a Z31 not a Z32

 

Qauife LSD

 

Also look what else i found, Leeder gears make a different gear ratio for the Zed but also so do Quaife well that's if they are compatible Quaife gearing

[John Dixon]

Tomei again though is a 2 way plate.

Important line is "Since the LSD will lock while backing off the throttle this design will help with sliding the tail out under more controlled conditions"

You have to be sure that you are a smooth enough driver not to back off the gas quick if you go into a bend too hard, otherwise there is a good chance you will spin.

I'm not sure if mine is an RS or MZ, will try to find out.

Might be worth looking to see if any of the japanese companies do ATB or tosen type diffs? They do seem to love the plate type though, guess it's the drifting culture.

Think I'll change mine for a quaife if they do one. Other benefit as well over the plate type is no maintenance, the plates do wear and need replaced eventually.

[John Dixon]

Just checked on the spec sheet for the quaife and theirs is for an R200 which I'm guessing is the Z31

NA Z32 is R200V, TT Z32 is R230V. Might be worth seeing if they would do one, some of the other big RWD cars must have a similar size diff.

[jaffaZ32]

Just checked on the spec sheet for the quaife and theirs is for an R200 which I'm guessing is the Z31

NA Z32 is R200V, TT Z32 is R230V. Might be worth seeing if they would do one, some of the other big RWD cars must have a similar size diff.

 

Found it.

 

This is Quaife USA and they do make a doff for the R230V but by the sounds of it only sell it via one seller. Horsepowerfreaks

 

Quaife usa

 

horsepowerfreaks

[jaffaZ32]

John i've sent the company a email.

 

here is the 300zx specific info:

 

"We are proud to offer the exclusive HorsepowerFreaks Quaife Differential Kit for the 300zx Twin Turbo. Quaife differentials deliver unparalleled performance and reliability. Supplying power to the wheel with the most grip, these helical gear differentials provide maximum traction under all conditions. Whether you are drag racing, road racing, drifting or even daily driving your car, offered with a lifetime warranty, this is the last differential you will ever need to buy.

 

To provide a complete bolt up solution for the 300zx we include the passenger side output flange that eliminates the need for any machine work."

 

And here is the Qauife generic info:

 

"The Quaife Differential powers both drive wheels under nearly all conditions, instead of just one. With an ordinary open differential, standard on most cars, a lot of precious power is wasted during wheelspin under acceleration. This happens because the open differential shifts power to the wheel with less grip (along the path of least resistance). The Quaife, however, does just the opposite. It senses which wheel has the better grip, and biases the power to that wheel. It does this smoothly and constantly, and without ever completely removing power from the other wheel.

 

In drag-race style, straight-line acceleration runs, this results in a close to ideal 50/50 power split to both drive wheels, resulting in essentially twice the grip of an ordinary differential (they don't call open diffs "peglegs" for nothing).

 

In cornering, while accelerating out of a turn, the Quaife biases power to the outside wheel, reducing inside-wheel spin. This allows the driver to begin accelerating earlier, exiting the corner at a higher speed.

 

The Quaife also controls loss of traction when the front wheels are on slippery surfaces such as ice and snow or mud, providing the appropriate biased traction needed to overcome these adverse conditions. The Quaife Differential provides constant and infinitely variable drive. Power is transferred automatically without the use of normal friction pads or plates seen in other limited-slip designs.

 

The Quaife's unique design offers maximum traction, improves handling and steering, and puts the power where it is needed most. A definite advantage whether on the track or on the street.

 

The Quaife is extremely strong and durable and since the Quaife is gear operated, it has no plates or clutches that can wear out and need costly replacement.

 

The Quaife is great for street driving or racing. Racers don't have to put up with locking mechanisms or spools that tear the steering wheel out of their hands when cornering. Because it behaves like an open differential during ordinary driving, street drivers will have trouble telling it's there until pushing the car's limits.

 

We are proud to offer the exclusive HorsepowerFreaks Quaife Differential Kit for the 300zx Twin Turbo."

 

This does sound the better Diff than the ones i was previously looking at. I'm up for ordering one of these according the price is right.

 

Also could i alter the ratio to the same as a leader gear ratio with the kits i posted up?

[walksonland]

I still have my 300zx z32 tt with the R230 diff fitted with a Quaife ATB and leader gear set. It has been off the road for the past 6 months after a engine blow and spin through a fence. I cannot fault the ATB and the gears made it go like stink. I intend to rebuild it but up to now I have not had the cash.

[jaffaZ32]

I still have my 300zx z32 tt with the R230 diff fitted with a Quaife ATB and leader gear set. It has been off the road for the past 6 months after a engine blow and spin through a fence. I cannot fault the ATB and the gears made it go like stink. I intend to rebuild it but up to now I have not had the cash.

 

Sorry to hear that.

 

So the Quaife Diff will work with leader gears, that's good.

 

Where did you buy your diff from?

[walksonland]

Now only available from HorsepowerFreaks they paid for all the extra ones out of the special batch made for a group mostly in USA I think I had the only one in UK.

[jaffaZ32]

Now only available from HorsepowerFreaks they paid for all the extra ones out of the special batch made for a group mostly in USA I think I had the only one in UK.

 

I'm glad you said that. I've got in contact with them.

 

I'm going to speak to my Mechanic tomorrow and get the all clear to order it.

 

Does the leader gear cog fit well with that diff?

 

They sound a great combination by what i have heard about them both.

 

Thanks.

[walksonland]

The leader gears bolted on as good as gold but you will need it all shimming up, new oilseals and get the front pinion bearing checked for condition. I am going to have to strip and change that bearing when I get my zx back on the road.

[jaffaZ32]

I ordered the Quaife in the end.

 

Hopefully it will be good timing, fingers crossed i get the car back next week, run it in, tak it back for more work and tuning and fit the diff then.

[Bubuche]

I'm very interesting in this.

 

So what do you think of the Quaife?

Did you installed also the leader gear?