s15 helical lsd? 180sx lsd? obx lsd? school me on lsds plz

[opponheimer]

What is the advantage of a s15 lsd over an 180sx lsd?

Has anyone had bad experiences with the obx lsd?

I just need something good enough to put power to the ground, i'm not drifting or anything, i'm having traction issues with my 450whp RB obviously.

[godsmack]

If you're having traction issues is it cause of one wheel peel or just overall. With traction issues u usually need to do something about your suspension and not the diff. But lsd is lsd and if you want something to lock up get either a 1 way or a 2 way diff and call it a day. And get better tires.

[clark]

well probably any 180sx Viscous LSD will probably be shot.

i personally have the S15 helical and effing love it. i don't drift either, but having an lsd rocks. so responsive out of turns.

there is that one kid on here who did a review of the obx helical in his s14 and apparently has not had any issues as of yet. it's also basically half the price of an S15 helical.


so did you ever figure out the problem with your engine?

[jr_ss]

If you aren't into drifting, then I would recommend the Helical... Mine works awesome, I can still slide if I want, but I'm not a drifter so it's more of a powerslide. On power coming out of the turns you can feel it transferring power to the outside wheel to propel you out of the turn. It works great for drag too. I don't know you're preferences and you may be the type of person that wants something to lock on decel and accel, then you should go with a 1.5/2 way. It's an OEM piece and damn near unbreakable because of it's design. It has my vote.

[opponheimer]

Originally Posted by clark

well probably any 180sx Viscous LSD will probably be shot.

i personally have the S15 helical and effing love it. i don't drift either, but having an lsd rocks. so responsive out of turns.

there is that one kid on here who did a review of the obx helical in his s14 and apparently has not had any issues as of yet. it's also basically half the price of an S15 helical.


so did you ever figure out the problem with your engine?

My ecu was bad, both of the ecus I got, put my AEM EMS on and bam ran fine on the base tune... Got it tuned partially to 20lb now @ 450rwhp
then i had to tear it apart cuz the manifold head flange was warped

[ANVIL]

what are you running now? open diff? i also have an rb and do mostly drag racing. anything will be better than an open diff. i have a 180 vlsd waiting to go in my car. i think miles/age doesnt matter its how well its been maintained. fresh fluid changes pretty often should help out with wear/life.

ive read TONS of good things about obx lsds from the honda crowd but nothing really from the 240 community. a lot of haters on it but nobody with any real solid proof or info, at least from what ive read.

[xs240]

hlsd = kick ass for grip/traction out of corners/etc... but be careful of hills/parking lots as it'll send power to the wheel with least traction, hence wheel spin with wheel in air/etc...

drifting = everything else (viscious, lock, etc...). The 1 way may be okay for road racing? 2 way = drift

And in regards to obx, not sure how it compares to nissan's oem hlsd however what i do know aceinhole bought one and changed some internals and it was okay by him... he has a pretty nice race car so if he ever shows up he can put more input into it.

There is of course the quaife HLSD (which is kinda rare) that would be pretty baller, again not sure how it differs to nissan's s15 hlsd... but id love to get my hands on it.

[smelly240]

viscous has nothing to do with oil being changed (its condition) really... its just hte abuse it endured.

the fluid inside the coupling never touches the oil... but it breaksdown/wears out from use.

i mean old oil might make it overheat easier but - if its vlsd and not shimmed... its not gonna lock up.

[rex2sx]

I think my favorit dif is the quaife or torsen diff jsut becuase how they work. These type of differentials transfer the EXACT amount of power lost to the slipping wheel over to the wheel with traction. I have yet to see one for 240s..Actually i think i did i cant remember the site though

Which is different from all the other types. Viscuos CAN be good, but like stated above they are sealed so when they are abused freguently, the oil breaks down and loses its thickness, thus they will stop working. Clutch types are cool except for when you have to replace them. Some last for a long time though. Not sure how long though.

Any you can get clutch types or helicals in 1/1.5 way or 2 way right?

[jr_ss]

Originally Posted by ANVIL

what are you running now? open diff? i also have an rb and do mostly drag racing. anything will be better than an open diff. i have a 180 vlsd waiting to go in my car. i think miles/age doesnt matter its how well its been maintained. fresh fluid changes pretty often should help out with wear/life.

Wrong. A VLSD is a sealed unit and the fluid cannot be changed. The Viscous fluid over time and abuse breaks down and the only way to fix it is to replace it with a new unit. You can shim it, but it'll still only last for so long....

Originally Posted by rex2sx

I think my favorit dif is the quaife or torsen diff jsut becuase how they work. These type of differentials transfer the EXACT amount of power lost to the slipping wheel over to the wheel with traction. I have yet to see one for 240s..Actually i think i did i cant remember the site though

Any you can get clutch types or helicals in 1/1.5 way or 2 way right?

The S15 Helical is a Torsen diff... Helicals are only made in one design. There is no 1/1.5/2way, they lock by the amount of trq being forced through them.

[opponheimer]

the obx is a helical design:

eBay Motors: OBX LSD HELICAL DIFFERENTIAL 89-98 NISSAN 240SX S13 S14 (item 400041228500 end time Apr-09-09 22:41:08 PDT)

[greddyguy]

you have a 450hp RB but still a diff noob?

i'd go with a s15 torsen diff, or a nice 2 way like the Tomei or Nismo diff

[rex2sx]

Originally Posted by jr_ss

Wrong. A VLSD is a sealed unit and the fluid cannot be changed. The Viscous fluid over time and abuse breaks down and the only way to fix it is to replace it with a new unit. You can shim it, but it'll still only last for so long....



The S15 Helical is a Torsen diff... Helicals are only made in one design. There is no 1/1.5/2way, they lock by the amount of trq being forced through them.

Torsen/helical/quaife..many different names and slightly different design but i like them the best

[HYPNOTIK]

I have the Balltec 1.5 and I love it. That's another option for you. I don't drag though, auto x/touge.

[Psycho 240 Freak]

I have a S15 HLSD and I only have about 300 whp. I can feel my rear end fighting harder for traction now, but with street tires, I'm still spinning a lot. I'm sure at 450 whp, without some really sticky tires. You'll be spinning regardless of what type of LSD you have. BTW, I still like my HLSD due to it's quietness and driving is still the same as an open diff in normal driving conditions. Even in bad weather, the car still drives like stock. The only time I notice it's there is when I mash on the gas.

[jspeedm]

Originally Posted by xs240

hlsd = kick ass for grip/traction out of corners/etc... but be careful of hills/parking lots as it'll send power to the wheel with least traction, hence wheel spin with wheel in air/etc....

wrong. it sends power to the wheel with the most traction unless one wheel is completely off the ground. then it works like an open.

[rex2sx]

Originally Posted by jspeedm

wrong. it sends power to the wheel with the most traction unless one wheel is completely off the ground. then it works like an open.

Yea. But even then, if you do the E-brake trick youll be able to get out.

[BigVinnie]

I have the OBX helical and have beaten the crap out of it for drift and autox. If you do other motor sports other than drifting its an awesome helical to own. Still holds up after almost 2 years of abuse. My friends have noticed the abuse that I have put mine through, that another one of my friends bought one too.
I love it for street use, and it is very responsive .
I don't know if the OBX will hold up to 450WHP, but I don't see why it wouldn't, it's a helical. Also check the pre load washers before install. My diff wass fine but I've heard that the pre load washers can be installed wrong on the OBX helical sometimes.

Some pics of my helical install.

[JRas]

^ really blue?! kinda gay

I have a S15 HLSD, love it

good for dd and grip use.. wouldn't be good for drift because they don't lock

they are reliable and no special fluid is needed

[A&M Boy]

i've got the obx lsd in my car. I just recently put an sr in the car and havent taken it to the auto-x yet but it does its job just fine. I followed Aceinthehole's example and opened it up and found that atleast one of the belleville springs was cracked, but i was planning on replacing the stack with a new set that was more beefy than the one that came with it. Other than that they are bulletproof; nothing can really wearout on them.

here's the thread that has alot of aceinthehole's info

http://zilvia.net/f/chat/101109-obx-...ng-review.html

and if you need i can dig up the old part numbers of the 2 sets springs i purchased.

[BigVinnie]

Originally Posted by JRas

^ really blue?! kinda gay

good for dd and grip use.. wouldn't be good for drift because they don't lock

Blue may be gay for you, I guess.

You don't need a locking diff for drift.
A softer suspension, which may cause some body roll will keep both tires to the ground for the HLSD. I've shredded plenty of tires with the HLSD and a some what soft suspension set up.
HLSD diffs are good for all around use, it isn't a diff that is specific to its sport, (like a 2way is for drift, and drag), (1.5way, 1way for grip, and auto x).

Mechanically helicals are far more superior to that of clutch type LSD's, as far as longevity is concerned.

[redline racer510]

A&Mcan you please enlighten us about how you replaced the "stack" and what parts you used and where you got them?

[rex2sx]

Originally Posted by BigVinnie

Blue may be gay for you, I guess.

You don't need a locking diff for drift.
A softer suspension, which may cause some body roll will keep both tires to the ground for the HLSD. I've shredded plenty of tires with the HLSD and a some what soft suspension set up.
HLSD diffs are good for all around use, it isn't a diff that is specific to its sport, (like a 2way is for drift, and drag), (1.5way, 1way for grip, and auto x).

Mechanically helicals are far more superior to that of clutch type LSD's, as far as longevity is concerned.

X2..Their in EVOs..I think..Their aweeeessooomme

[Exas Spec D]

So do HLSD's work as good/bad as VLSD when it comes to drifting? I mean, I drift with my VLSD pretty fine until it heats up and just starts slipping after 2 runs.

[opponheimer]

Anyone know what size belleville springs need to go on a obx lsd? And is a press needed?

[BigVinnie]

Originally Posted by Exas Spec D

So do HLSD's work as good/bad as VLSD when it comes to drifting? I mean, I drift with my VLSD pretty fine until it heats up and just starts slipping after 2 runs.

HLSD's far surpass the performance of a VLSD, and will probably outlast it 5 times the abuse and use. HLSD's use very little friction, which in most mechanical parts that endure friction, decrease longevity. In most cases HLSD's can be repaired, while VLSD's have one life span from it's sealed enclosure for viscous silicon gel.
HLSD's are much more responsive to driving conditions than a VLSD could.
The driver has much more control of braking response, and chassis maneuverability. which is why an HLSD is is selected by more people in auto x and grip, than VLSD would be.
As far as drifting I find the helical to be far superior to that of the VLSD, as long as the proper suspension for the HLSD would be used.

[Exas Spec D]

Thanks BigVinnie for the legit info and for answering my question. Now I shall purchase an HLSD.

[rex2sx]

oh so my infos not legit, i hate you..lol

Dont worry im not lying, i studied rears for a month STRAIGHT in school..day in and out.

[jspeedm]

Originally Posted by rex2sx

Any you can get clutch types or helicals in 1/1.5 way or 2 way right?

helicals only come one way.

Originally Posted by rex2sx

Yea. But even then, if you do the E-brake trick youll be able to get out.

yeah if you're stuck. you can't do that going around a tight corner, when the inside wheel lifts, if you want to maintain exit speed.

[S14DB]

Originally Posted by jspeedm

you can't do that going around a tight corner, when the inside wheel lifts, if you want to maintain exit speed.

That's a suspension issue not the diffs problem.