OBX Helical LSD

[Jean]

There are a number of these on ebay for e30, new items for about $400 when you are taking a gamble with a 100-200k on a used stock S diff for $200 and up.

Are these junk ?

[Mike325]

Aren't these the ones out of the ix?

[Jean]

I didn't see where it said Only for IX but you might be right. I am just thinking if a used rear end with a tired and old lsd is worth 200-400 or if it makes more sense to look for a new LSD instead if one is available that is.

[backtrail69]

Both Jon Volk of 666 Fab and my friend Sam (mechanic/honda nut) said that people have been using them in drag hondas for quite a while and they have worked extremely well. You just have to replace the hardware with higher grade ARP bolts or something and to make sure everything was torqued correctly. I personally would rather not deal with setting backlash and all that stuff when you are setting up a diff. I would leave that stuff the the professionals. So, bolting in a used diff works for me.

[matt]

the iX diff is Viscous, not helical.

[2002maniac]

I think this is supposed to be a cheaper (probably chinese) copy of the Quaife differential.

If it offers true quaife performance at that price I would definately buy one. The real thing is ~$1400 IIRC

What I'm afraid of is that this is a case of, "You get what you pay for"

[matt]

I think this is supposed to be a cheaper (probably chinese) copy of the Quaife differential.

If it offers true quaife performance at that price I would definately buy one. The real thing is ~$1400 IIRC

What I'm afraid of is that this is a case of, "You get what you pay for"

Ditto.

Then again, for $400... I'm thinking about it.

[BrandC]

I think this is supposed to be a cheaper (probably chinese) copy of the Quaife differential.

What I'm afraid of is that this is a case of, "You get what you pay for"

OBX has been around a while now, so they have to at least know how to cheat people or copy high-quality products very well.

I suppose if you ask OBX what kinds of materials they use to make the housing and spider gears you could compare it to a Quaife unit. The expensive part of the Quaife is the engineering and research that goes into making a helical unit. It's much more complicated than clutch-pack differentials in that they are designed not to wear very much/at all.

[Jean]

Quaife for e30 is $1400?? wow, a friend of mine who autox with me has one on his rsx-s and it was much much cheaper than that brand new.

I tried to find a price online for it, 693 pounds http://www.quaife.co.uk/BMW-325i-E30...B-differential

It does not list the lock % though.... anybody know ?

[2002maniac]

It does not list the lock % though.... anybody know ?

100%

that is the beauty of the quaife.

[Jean]

I am going to have to give this a second thought, maybe pick up a medium case rear diff open or lsd and then go from there with the addon obx or quaife...maybe there are other options out there.

Thanks guys

[MikeE30325i]

My Sentra Has A Quaife Lsd In It. Very Nice.

[E30-323ti]

100%

that is the beauty of the quaife.

It's not just 100% as that would be hideous off throttle & turning.

It is infinitely variable, torque gets split proportionately between the wheels, the larger proportion goes to the wheel with the most grip (or that can apply the most torque to the ground).
They are also often call TORSEN diffs, for TORque SENsing.

For $400 brand new, it's worth a go really!!!

[2002maniac]

It's not just 100% as that would be hideous off throttle & turning.

of course. i should have been more clear. There is NO lock unless it is needed.

[Mr Deagle]

someone buy it and test it for us