I'm reconfiguring my car a bit this winter and looking at strengthening my differential. I started out looking at kaaz, and cusco. I found AST and this particular lsd. Is anyone familiar with them? Here's the website I found for them and a copy of the email I received on my inquiry.

I'd surely appreciate you comments.

fltsfshr

Email to them
Hi I'm looking for a strong lsd for my modified S2000. I
dyno at 305rwhp. I'm running j's 444 gear set. I am reviewning the
carbon lsd for a combination street/autox combination. How is the
longevity in the carbon set and would you still recomend it over the
metal. I'm also looking at cusco and kaaz.

Their Response
We recommend our carbon LSD for S2000 unless your S2000 is pure race
car for drift contest. Most of the professional test drivers
commitioned by us found that for the D1 (drift grad Prix), the metal
LSD peformed better with the instant lock. For roadracing and
definately street driving carbon LSD provide excellent performance.
Strong metal clutch type LSD is usally associated with chattering /
cranking noise, but the noise of our carbon LSD is much lower, almost
unnoticable with our LSD oil.

Best regards,
Yasu / ATS USA

thanks again

fltsfshr

ps here is their website

http://www.a-t-s-usa.com/ats-products/List...ts-products.htm

 

I just heard from them again...fast service...this is his repsonse regarding life expectancy of plates.. CARBON lasts longer that steel. I'd still like your comments thank you

"Both carbon plate and metal plate wear away as the time passes. Carbon
last slightly longer than metal. By the way, the material is called
carbon/carbon and it is different from carbon fiber. If you mainly
drive on the street, the cycle of overhaul (changing the internal
plates is 2 to 4 years) depending on your way of driving. Professional
race teams (either D1 or roadrace) change the internal plates more
frequenly to adjust the initial torque - sometimes every 2 to 3 month.
But for most people, even a metal LSD last at least 2 years before the
first overhaul. The only important maintenance is changing LSD oil
every 3000 to 5000 milies for street driving. This goes for both metal
LSD and carbon LSD.

Best regards,
Yasu / ATS USA"

 

I've been told the carbon clutches last significantly longer. If that's the case, then I say go for a carbon lsd.

My Kaaz LSD has about 40k miles no it and I'm starting to get wheelspin. This might just be an issue with the redline fluid I have in there right now (I have another thread going about this subject). I'm going to play with the friction modifier content a little this weekend to see if I can get some more lockup out of it, but I suspect the clutches are starting to wear down. Overhauling the diff is a PITA, so I would recommend you go with whatever will give you the longest service intervals.

I definitely agree about changing the diff fluid regularly to maintain the clutches. However, I don't agree with the 3-5k recommendation. You should be able to feel the diff become noticeably more chattery when the fluid gets cooked, so just change it when that happens. That said, in my experience, Kaaz fluid will cook from one day at the track or hard mountain driving. The redline fluid I have now seems to last longer, but now I'm having the opposite problem - instead of chatter, I'm getting wheelspin. Anyway, if you change the fluid and then spend a weekend at the track, it's probably time to change it again, even if you haven't gone 3k miles. Conversely, if you change it and then drive 10k miles on the freeway, you probably are still ok.

 

what's the penalty for this ats lsd?

 

About $1100-$1200, last I checked.

 

$1400

fltsfshr
http://www.a-t-s-usa.com/ats-products/List...ts-products.htm

What I was looking at on their website was how the carbon differential functions compared to a metal clutch plate differential when you corner. Reverend I wouldn't mind your opinion on that.

It's also suppose to be a quieter differential compared to the metal clutched ones.

I'm hoping for a bit more input before I decide which way I'm going.

thanks

fltsfshr

 

I've heard they're quieter and I've heard they last longer. As for differences in how they make the car drive - I couldn't tell ya... I've never driven a car with a carbon lsd.

 

Here is what the Yasu told me this week. I placed my order yesterday 1,400.00 ouch!

Thank you very much for your interest in ATS products.
We do not have "deftforce"LSD for S2000.
Even though we do not have "Deftforce" for S2000, ATS recommends
standard metal LSD 2.0 way. 2.0 way comes with 60 degree cam
instead of 55 degree which is used for 1.5 way. 2.0 way gives you a
stronger locking performance for drifting. In addtition, our standard
LSD for S2000 has 16 plates in it like deftforce and provides
excellent durability.

Regarding your second question, we generally recommend our carbon LSD
for S2000 for compromise. If you are professional driver attending
drifting competition like D1, metal LSD might be better than carbon.
However, strong metal LSDs like ours usually have chattering noise and
annoy small percentage of people. The tolerance level is different by
person to person. However, for steet driving and roadracing, carbon
LSD is better without giving you much chattering noise (with our LSD
oil).

 

ATS carbon LSD's are used by J's race car and Amuse will soon use the ATS LSD for competion.

 

Some would say that the ATS LSD Carbon is the best on the market for now. But unfortunately it comes with a hefty price tag. If you think about so does everything else that is top of the line whatever it is.