I would like to make some experiments in a second hand diff,putting a kia 4.77 gear set and I wanted to know if anybody has tryed this cheap LSD diff on the S2k.Is it worth it?I read even good opinions, especially for the quality/price deal.
Another question:what s the real difference between a stock s2k differential and a OBX/Quaife helical LSD diff?

 

I have use the obx diff in fwd applications, i can tell you that they are pretty crappy. You have to rebuild them out of the box, deburr the gears, sometimes replace the bolts, make sure the preload washers are in the correct position, then make sure the diff is true.

If you have the time and know-how to do all this then they are a great deal. They work good and i haven't see one break.

 

OBX = cheap ebay brand.. OK for some things but I wouldnt use them for any internal components.

http://www.honda-tech.com/showthread.php?t=1249085


Quaife is a reputable manufacturer of LSD's.

 

It is junk, save your money for a better unit. Quaife, OSG, Carbonetic, or even Kazz are all miles better.

OBX does not fit

 

thank you guys for the informations!
I don t have the know how to fix it in a proper way, so I think I ll leave the OBX idea and I ll just put the 4.77 in the stock diff...

By the way, a proper LSD diff what kind of advantage gives?Why it s "compulsory" for drift race?Is it because gives more power to the external wheel while spinning or what...sorry but I still have to comprehend this thing...

 

There are a few different types and configurations of differentials.

The stock s2000 diff is a helical or torsen type. It's a 1 way diff. It can lock in forward acceleration, but not on decel. It's open on decel. It's also open if one wheel is off the ground or there is a huge disparity between grip levels of wheels. Like...one wheel being on ice and the other on pavement. It works with a worm gear, takes no LSD additive in the oil, and doesn't wear out in the traditional sense. The lock won't slip and they have very smooth operation. Quaifes are stronger than stock.

Clutching diffs can be configured to be one way, two way (locked on decel and accel.), or 1.5 way. The locking strength can also be adjusted. The oil can be expensive. these will stay locked even if one wheel is off the ground. Imagine a set of clutches between two wheels. The clutches wear out over time, and can chatter. 2 way clutching diffs is where its at for drift cars.

Vlsds or viscous LSDs are clutchpack lsds operated by viscous fluid that heats up and pushes the clutchpacks together. The locking strength is usually weak. Nissan uses Vlsds in 240s, 350s, etc. Awd vehicles usually use these for the center diff.