A mechanical LSD will transfer torque to the wheel that needs it most, so you are not smoking the inside tire when taking a turn at speed with the throttle planted.

It is not always necessary though. For example the Lotus Exige does not have an LSD. The consensus from what I have read on the Lotus forums is that it is not necessary for the track unless you are autocrossing, which involves low speeds and therefore needs more traction.

 

My S2000 didn't come with the LSD. From my understanding it came with the AP2's

 

all S2000s come with LSD

 

Yes. All s2000 have LSD. AP1 and AP2

 

Ok, im surprised no one has said this yet... every s2000 comes with a LSD BUT if you upgrade to a 1.5 or 2-way you will see better times on the track, ON THE TRACK only.

When you push the limits of the s2k on the track, the inside rear wheel can lift and with our LSD it will send all power to that wheel which doesn't help. So if you upgrade it keeps the power fully locked into both wheels. In other words when you turn both rear wheels will turn at the same speed which also causes scuffing(like most 240s you see around) but not as bad. I dont have one of these after-market LSD's yet, but plan to in the future, I hear it totally changes how the car handles(for the better) and alot of racers like them.

 

Welded spiders FTW.

 

So if i get 1.5 way LSD, it'll help my cornering better right? And it's a lot easier to predict when will i oversteer. Thinking of getting it after a set of coilovers.

 

The purpose of a limited slip diff is to be able to accelerate harder though a corner. While it does have an effect on how the car behaves, it isn't necessarily making it "better" or "worse." Nor does it make the car, if I understand the gist of your question, "easier to drive."

Sounds like you have an oversteer problem - changing the LSD is not how to go about solving this. Alignment, tires, suspension, and most importantly, driver, are where to look.

 

No thats what happens when you have an open differential, the factory S2000 diff will not send all the power to the wheel with the least grip, it wouldn't be an LSD if it did.

The difference between the factory lsd and an aftermarket clutch type or a quaife gear type is how much it locks (bias), when it locks, under how much power, etc etc. Basically they are more aggressive as well having the ability to handle more power.

 

No, he's right. Torsen type LSDs act like open diffs when one wheel is off the ground.