S2000 Racing and Competition The S2000 on the track and Solo circuit. Some of the fastest S2000 drivers in the world call this forum home.
View Poll Results: Which LSD unit have you used and do you recommend?
Cusco RS (coil spring engagement, clutch, 1.5 way, 100% lock)
11.82%
Cusco MZ (Bellevue washer engage, clutch, 1.5 way, 100%)
0
0%
OS Giken (Bellevue washer engagement, clutch 1.5 way, 100%)
39.09%
Carbonetics (Bellevue washer engagement, clutch, 1.5 way, 100%)
9.09%
Kaaz (similar to Cusco MZ, clutch, 1.5, 100%)
15.45%
Torsen stock (non-clutch)
12.73%
Torsen Quaife (non-clutch)
11.82%
Voters: 110. You may not vote on this poll

Which LSD Unit Do You Recommend

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Old 12-18-2008, 08:01 AM
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Originally Posted by blackey,Dec 17 2008, 12:51 PM
FYI,

Kaaz has a new diff out call the super q. It is touted as having even higher strength, no break in, and is OEM quiet.

I have not seen one yet, but Kaaz is pretty well respected.

Bill
Wow... That Super Q sounds pretty cool!!

http://www.kaazusa.com/superq/
Old 12-18-2008, 08:42 AM
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Originally Posted by TheNick,Dec 18 2008, 09:46 AM
Dude I don't know if you noticed, but he's already in SM2.

'02 S2000T - Track Toy, Laskey 2.0L GT3076R motor, PuddyMod Racing diff, Moton CS, CCW Corsair C10s. 421 RWHP/285 RWTQ
True dat. BSP = land of the Diamond Star Maulers; no way I'd be competitive there. $M2 is fun on a local level but I won't be closing in on Erik and Andy's FD RX7s until I get a lot more seat time and really get the car dialed. Guy's gotta have goals, right?

Thanks again for the inputs on autocross diffs. Many good responses on this thread and offline. Looking like OS Giken 1.5 will be the one for me this time around. I had no probs with the Cusco RS 1.5 way at 100% lock last time (a little crunchy when cold, but I don't mind a little "charm" if it goes away when warm). I'll definitely post my observations once PuddyMod Racing gets my diff to me with the OSG in it.
Old 12-18-2008, 08:58 AM
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Originally Posted by mikegarrison,Dec 17 2008, 01:19 PM
Specifically, I think you mean the T-2R. It's the R version that is preloaded to avoid the lifted wheel issues. The S2000 already has a type T-2. http://www.torsen.com/files/Torsen%2...on%20Chart.pdf

But is there a T-2R that drops into the S2000? From Torsen: "The current applications for the TORSEN T-2R include the Ford 8.8 inch axle, the GM 8.5 inch axle, and the GM 7.6 inch axle."
Absolutely correct, the R version. My understanding from Torsen was that it was dimensionally identical but that the worm gears had a different taper. Worth a call. Don't forget that Torsen specifies that a much "heavier" wt fluid can be used to help determine some of the characteristics of the diff.
Old 12-18-2008, 09:45 AM
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Grassroots Motorsports tested diffs in a SCCA T3 race car on a tight autocross like track in the latest issue and found the OS Giken as their favorite.
Old 12-18-2008, 10:23 AM
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Originally Posted by stantaur,Dec 18 2008, 09:42 AM
True dat. BSP = land of the Diamond Star Maulers; no way I'd be competitive there. $M2 is fun on a local level but I won't be closing in on Erik and Andy's FD RX7s until I get a lot more seat time and really get the car dialed. Guy's gotta have goals, right?

Thanks again for the inputs on autocross diffs. Many good responses on this thread and offline. Looking like OS Giken 1.5 will be the one for me this time around. I had no probs with the Cusco RS 1.5 way at 100% lock last time (a little crunchy when cold, but I don't mind a little "charm" if it goes away when warm). I'll definitely post my observations once PuddyMod Racing gets my diff to me with the OSG in it.
Did you use any friction modifier to fix the cold-chattering?

You could always WPC treat any metal LSD plates to reduce/eliminate any chattering.
Old 12-18-2008, 11:49 PM
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Originally Posted by TypeSH,Dec 18 2008, 12:45 PM
Grassroots Motorsports tested diffs in a SCCA T3 race car on a tight autocross like track in the latest issue and found the OS Giken as their favorite.
The OS gikken was fastest, but it was only a few tenths faster than stock which was about equal to the kaaz.
Old 12-19-2008, 04:26 AM
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Originally Posted by Davidss,Dec 19 2008, 02:49 AM
The OS gikken was fastest, but it was only a few tenths faster than stock which was about equal to the kaaz.
Surprisingly little difference between the diffs.
Old 12-19-2008, 05:25 AM
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It was a very small track. According to the guys at GRM a few 10ths is a big deal on that tight little track.
Old 12-19-2008, 06:53 AM
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Originally Posted by Davidss,Dec 19 2008, 12:49 AM
The OS gikken was fastest, but it was only a few tenths faster than stock which was about equal to the kaaz.
True, but in AutoX a a few tenths can be the difference between 1st and also ran. On the track a few tenths here a few tenths there and now you are talking about real time.


Peter

Who spent a whole test day on his back changing out smoking hot pumpkins.
Old 12-19-2008, 07:18 AM
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Originally Posted by T3S2000,Dec 19 2008, 10:53 AM
Who spent a whole test day on his back changing out smoking hot pumpkins.
Were they at least Blonde?


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