1way diff
 

My car is DD and I mostly drag the car on weekends and I also plan of tracking the car when the weather gets a bit cooler since I don't have an oil cool

Will the Quaife LSD work great as the 1.5 in the track I want to know where would I notice the difference?

The Quaife is not a locking clutch style LSD, so it 1.5 or 2.0 way doesn't apply. It's a torsion style differential and never locks. They are very smooth for street use, but I don't like them on track because of the fact that they never lock and it's common for a wheel to leave the ground, which will cause a Quaife to become essentially an open diff for that moment. Once you become accustomed to have a locking 1.5 diff feels it's hard to go back. I prefer the OSG...my favorite. Use on the 370Z, G37, GT-R, our GT3..you name it. : home :: online store ::...

for the most part I agree. Torsen diffs are great as long as both wheels are on the ground...for most people though, the open diff behavior during wheel lift is actually a good thing. Their life and maintenance is also much better for a streeted car.

Can you expand on this a bit? Been reading up on 1.5-way vs Quaife, and this seems to be the main tradeoff (Quaife doesn't handle a wheel in the air well, but is much simpler on maintenance and still a decent drivability upgrade over stock VLSD). Why is the open diff behavior actually a good thing? (easier to get the car back flat?).

basically, yeah. Most people won't encounter a lifted tire situation where they need to be on the gas--you shouldn't be putting yourself in a situation like that in a car DD, ever, IMO.

Clutch-type diffs can be a huge PITA on the street. The OSG is definitely streetable though...I just think for several hundred less, greater streetability, and essentially identical performance within the realm of most people's driving, the torsen diff is a winner. Everyone will weight things differently though.

The wheel in the air is a track thing when you are bouncing over curbs. If you have a wheel in the air on the street then you have a serious problem :p

I definitely prefer the locked behavior over curbs, it makes the car much more predictable. If you get wheel spin over the curb you experience loss of acceleration and a straightening effect (car rotates less while turning). It's only a split second though so most people won't notice unless really pushing hard. Cars set up with really stiff springs are going to bounce more, with the 12K/10K I have I barely bounce at all unless the curb is quite high.

I've seen some cars on auto-x lift a wheel in a corner without hitting a curb too. What happens w/ the Quaife vs 1.5-way there in terms of effect on the car? I'm leaning towards the Quaife setup just for cost and maintenance, but I don't want something that's going to cause some kind of dangerous or unpredictable reaction on a track in any of these wheel lift situations.

It won't be dangerous, just you won't be able to go crazy curb hoping on really tall curbs. You'll know when you've bitten off too much, just make a line correction to compensate.

At auto-x I've only seen FWD cars lift the rear tire, it is pretty rare for a RWD car to do this.

You got to have some stupid setup to lift a rear wheel on a RWD car. I know the BMW lifts the front wheel with the giant sway bar they run.

On a road course over curbing it happens all the time. On the street, unlikely but still have experienced it on really tight twisties, usually slow speed right turns as the inside pavement "falls away" from the tire. It's not so much the tire lifting, it's more like the pavement falls away in a dip. Those that have run Tail of the Dragon or the North GA mountains know exactly what I am talking about. :) Makes me want to go back. :)

Aside from more frequent changes, there are few drawbacks to daily driving the OSG 1.5 way LSD...no noise or overly obnoxious inside tire grab during slow speed manuevers. The older LSD's of yesteryear were intolerable for daily street use. Not anymore.

But if you don't see yourself doing track days or really pushing the car hard, the Quaife is going to be an improvement over stock for sure, and it's OEM fluid change intervals are inviting.

Glad we all have choices. :tup:

OK I bought the Quaife because it's mainly a DD and it won't be a bad mod for the track but not the best choice for a track car which mine is not

now how often should I change the diff fluid ?

For daily driving, once every 30K miles is what I recommend. Motul Gear 300 75/90 or 75/140 for the extreme use-track use.

when the track is open I drag almost every week sometime drift and planning on ditching that but tracking the car should I change it a bit earlier than that?

I will go with 75/140, how many quarts needed?

For the Differential you will need 2 liters...click here and order qty2: home :: online store ::...