Topic: Gauging Interest in OS Giken Differential

[DrJones]

I've been working with OS Giken to try and get a differential for our cars developed.
We are trying to gauge the interests the product.
It would be a 1.5 to a 2.0 way limited slip (as opposed to the stock lsd being a 1.0 way)

Basicly 1.5 way has 50% lock-up avalible under deceleration (off throttle)

Higher performance differentials like this can improve a vehicles handling immensely.
It would be an even larger improvement for the base models with the open differential.

as you would guess it would also work in other platforms that share our differential (e.g. CTS/CTS-V).

So this thread is to start a discussion on it and bring up questions (not to sell anything).

[miller11386]

Give me a driving scenario where a 2.0 LSD is better than a 1.0LSD.. im still not getting it.

Or is it just better at taking abuse?

[ophidia31]

I didnt know the difference, but heres a quick dirty explaination I found in google:

1-Way, 2-Way, 1.5-Way.......... What Does It Mean?

Some manufacturers make LSD's in different configurations and are commonly classified as 1 way, 2way, and 1.5 way. This designation reflects the design of the cam groove which enables the LSD to function differently under different loads. A 1 way differential means that the cam is shaped in such way as to have positive lock only when accelerating. The 2 way is constructed in a way to have positive lock motion in either acceleration or deceleration. The 1.5 way is a new term used to describe the 2 way cam which enables different lock up rates during the two directional forces. The 1.5 distribute positive lock stronger under acceleration than when decelerating. The 1.5 way can provide more forgiving balance when braking than a full 2 way setup, although it is less effective for true racing applications, it provides easier operation for beginners in throttle off conditions. It is also effective for front drive cars which need extra stability during braking.


Id love to have a better lsd but my base model came with the lsd option. Which is good enough for me and my driving. If I had more power and tracked it alot, id be more interested, but a new one is the last thing on the list. Good to see guys working with companies to get more stuff for our cars though. 

[Critterman]

Are you thinking different ratios as well  Dr. J?

[DrJones]

No gear ratio change.
I don't think OS Giken would make a different ring gear. The stock ring would bolt to this unit.

[Critterman]

any ball park figure?  I think a lot of us would like to think we could handle the 2.0, but I would be leaning toward the 1.5

[miller11386]

Im good with OEM unless it gives out.

This may be beneficial to auto x guys, but my car will be ill suited for auto X, so fairly mute point for me.

SOB or rlhammon may be better ones to ask.

[DrJones]

Generally most people don't use a 2.0 way.

Price would probably be $1500 to $1700 area. A little more pricey than strut bar, but 100x more improvement.

If you haven't driven a car with a 1.5 or 2.0 way diff you're missing out. it's amazing how much more you can steer the car using off-throttle adjustments.

[SKY888]

I've been working with OS Giken to try and get a differential for our cars developed.
We are trying to gauge the interests the product.
It would be a 1.5 to a 2.0 way limited slip (as opposed to the stock lsd being a 1.0 way)

Basicly 1.5 way has 50% lock-up avalible under deceleration (off throttle)

Higher performance differentials like this can improve a vehicles handling immensely.
It would be an even larger improvement for the base models with the open differential.

as you would guess it would also work in other platforms that share our differential (e.g. CTS/CTS-V).

So this thread is to start a discussion on it and bring up questions (not to sell anything).

if this is a parallel axis type differntial with a 2:1 bias torque bias,  I will just stick with the stock LSD.
or get the Quaife, which is a very similar unit.


Im personally interested with a torsen differential (cross axis differentials) thats around 3.5-4:1 torque bias........and maybe 8:1 torque bias

[DrJones]

It's a clutch type.

and the problem with torsen type is that if you lift a wheel off the ground it instantly becomes an open diff.
Clutch types don't care if a wheel is off the ground.

And yes, depending on the course/surface/conditions I have lifted an inside rear tire.

[elff]

I'd spend that money on a proper roll cage first.
because, if I can't get the kappa on a track, then I really don't need a better rear diff.  What we have, works more than well enough on the street. 

Wouldn't swapping out the diff change your classification in AutoX?

[DrJones]

Not in Street Prepared. You are allowed the replace/change the differential but not the gear ratio (unless there is a model listed on the same line as your car in the class listings).
The GXP's and Base models are separate. so no swaping there.

If you're road racing / Tracking the car you'll need a roll cage anyways (or should have one).
I think it would have a better improvement for the auto-x than the track driver. Not saying it won't improve the control for the track user.

[elff]

Then I definitely don't need it as I don't AutoX anymore.   I got tired of spending an entire day waiting to drive my car for only a total of 4-6 minutes. 

[bondosgto]

waht makes this better than the quaiffe?

[Critterman]

I don't believe Quaffie makes a diff for our car anymore.

[Gentleman Jack]

I thought a Quaiffe was something else all together...

[snaponbob]

Courtesy Google http://www.autotech.com/quaife/news.htm

[Sol Asylum]

I thought a Quaiffe was something else all together...

Isn't that how people from Maine pronounce coffee?

[Gentleman Jack]

I don't know if that's a good price, but it's a lot cheaper than the Vette.

And that pronunciation of Coffee would be more mid Rhode Island than Maine.

[Critterman]

Courtesy Google http://www.autotech.com/quaife/news.htm

Early last year if I remember correctly.  DDM was looking into buying some and there were 2 left.