Yah I know about all the differences and how they work, and I like a plate clutch much more than a Quaife on the track, but I'm suprised ya'll are saying the clutch ones are wearing out this fast on the 996. Ive known several clutch style LSD's go 30-40k miles on street with some track use. Ive had the most experience with OS Giken's.

 

Just to clarify that 30-40k is not in a 996 which is why im asking, this is my experience with other vehicles.

 

I read that a LSD was optional in europe.

 

The only problem with LSD's in the 996 TT was the perceived increase in understeer which the TT is not short on at all. Obviously the TT is also not lacking in rear traction either being rear engine and AWD so emphasis on the cars that keep their AWD will be low.

For 99% of Turbo owners running an LSD with AWD will prove useless, however for fine tuning the handling at the track, it could provide some use once you really are in control of the turn-in and mid corner handling aspects of the car.

 

The reason that a TBD is such a good option for the street, among the other reasons already mentioned, is the part about the car having a tendency to push on corner entry. When you introduce an LSD, which locks on braking, it increases that push and leaves you fiddling around with your suspension settings to dial it out and get it right.

For a street driven car, the likelihood that you will ever brake hard from say 120mph down to 50mph to enter a corner is minimal if ever. Under those conditions on the track, the LSD gives the car more rear end stability. For a car that doesn't ever see those conditions, why introduce the understeer when you don't need the stability? This is one of the major reasons that the TBD is so popular for the AWD Porsches among owners who don't race their cars.

One other thing I will mention, since I don't see it said elsewhere in the thread is that we do manufacture more than just LSDs. We do also make a top notch TBD for your car. It's not as well known as the LSD, which is really our claim to fame, but it is a part of our product line. In fact, I even have a low mileage used one right now that was part of what I am calling the GT3 Auto-x experiment. The "experiment" failed and after 2 events the car owner pulled it out, had us rebuild his factory LSD, and we bought back the the TBD from him. PM me for pricing.

Lastly, with respect to wear and tear on the LSD. I cannot speak to any other brand or make. But with our LSD we are generally seeing guys get between 3 and 5 seasons of PCA racing on turbo cars between rebuilds. For a street car that sees the track once or twice a year, I would expect that it would last as long as the gearbox does between synchros. There's also no special service interval for oil changes with our unit. If you're tracking the car, you want to change it more frequently because of that. But if you aren't, there's no reason to change the oil change cycle just because of the addition of one of our LSDs.

Sunnyside,
We don't make an LSD for Tip. but we are less than a month out on releasing a TBD for the Tip. It's been a long time coming, but they are just finishing them up, and once we get a couple in cars to test here in the states, we'll release them for wider distribution.

Regards,

Matt

 

Matt, your on the case with things... TBD for a Tip, well done that man!

 

You're welcome. It's one market advantage to being a small craftsman business. When you talk to me, you are talking to the owner of the company and I have the ability to choose to make things in small batches for a limited market.

When you're dealing with most of the other vendors out there in this market, you're talking to a salesman, who gets his parts from a distributor for some massive overseas company. If it doesn't make sense to the pencil pushers back in home office the thing will never get made. I can make something in as small of a production run as 10 units. Try to get Toyota or one of the other players in this market to do that for you. They may be able to make things cheaper, but they'll never be able to serve you in the same way.

 

That's an excellent reply.
The reason I want an LSD is that even on the road the rear breaks loose, even with PSM and with PSM off I dont think the car is capable of using ABD to control a single rear wheel spin out under high power oversteer. I would like the oversteer controllability of a slipper in the rear.
Please post when you have on ready. Does the box have to come out??
Frank

 

Yip, there accelerator pedals are a bit sticky also

 

Hello Frank,

We will not be making a true LSD for the tiptronic. The differential in that box is just so small that we didn't feel we had enough space to work with to make an effective LSD that would lock and be able to hold the power of the turbo cars. The only differential we'll be producing for the tiptronic will be a TBD gear-driven diff.