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Hiya, I was going to hijack the other thread but i'd thought i'd start one here..

LSD, really worth its weight in gold? Atm im contemplating on either sports or SE, its £1k difference or there abouts. I'd just like to know more about them in this particular car.. will it ever get used if not pushed very hard? will it need any extra maintence? Is it better than traction control?

Perhaps the most stupid question is - LSD is just a mechanical version of traction control (electronicly conrolled) right?

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Hiya, I was going to hijack the other thread but i'd thought i'd start one here..

LSD, really worth its weight in gold? Atm im contemplating on either sports or SE, its £1k difference or there abouts. I'd just like to know more about them in this particular car.. will it ever get used if not pushed very hard? will it need any extra maintence? Is it better than traction control?

Perhaps the most stupid question is - LSD is just a mechanical version of traction control (electronicly conrolled) right?

even if you have got a lsd(me do) you still have traction control matey.a lsd gives you better control of a slide if you do like getting sideways. :unsure:

but it all depends on your drivin style matey.

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LSD type differential on sport model does not require any special treatment.

As the matter of fact, it uses the same oil and has about the same wear that normal differentials have.

That is because it's not a real Torsen but a torsen type. It's operation is based on friction between gears, oil and differential's case.

That means that there is no so stable performance as other pure mechanical LSD differentials but there is also no particular wear.

I think it’s just about right for the IS200 sport model and it really makes a difference. Especially on slippery roads (plenty of, we have here).

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Perhaps the most stupid question is - LSD is just a mechanical version of traction control (electronicly conrolled) right?

I'm sure that someone will correct me if I'm wrong. But as I understand it, an LSD will help you put the power down when cornering hard. With an "open" (conventional) diff, the power could mostly be spun away through a lightly-loaded wheel due to the cornering forces, meaning you won't get the power down properly. A limited-slip diff will, as the name suggests, limit the slip that the diff produces which means that you can get more power down.

Traction control can work in different ways. On the IS200 it seems to work by detecting when the wheels are slipping and then limiting/cutting the power.

So the LSD helps you put more power down in some situations, whereas the IS200's electronic traction control will actual cut the power in other situations. So they'll be doing different things.

But yes, in a way the LSD is a sort of traction control.

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Perhaps the most stupid question is - LSD is just a mechanical version of traction control (electronicly conrolled) right?

I'm sure that someone will correct me if I'm wrong. But as I understand it, an LSD will help you put the power down when cornering hard. With an "open" (conventional) diff, the power could mostly be spun away through a lightly-loaded wheel due to the cornering forces, meaning you won't get the power down properly. A limited-slip diff will, as the name suggests, limit the slip that the diff produces which means that you can get more power down.

Traction control can work in different ways. On the IS200 it seems to work by detecting when the wheels are slipping and then limiting/cutting the power.

So the LSD helps you put more power down in some situations, whereas the IS200's electronic traction control will actual cut the power in other situations. So they'll be doing different things.

But yes, in a way the LSD is a sort of traction control.

Thanks for clarification :) So LSD retains its power by shifting the inside wheel to correct speed (slower speed) whereas the outer one to be faster. If the above is true then wouldnt traction control come on less frequenly (less sensitive) on a Sport than a SE because it has LSD to keep the wheels spinning @ correct speed while cornering thus less slipping more grip..?

what is the difference between the se and the sport lsd as im buying a sport one some time soon

thanks

The Sport has LSD the SE doesn't.

thats what i thought....

Also thanks for the info guys, very helpful :)

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Thanks for clarification :) So LSD retains its power by shifting the inside wheel to correct speed (slower speed) whereas the outer one to be faster. If the above is true then wouldnt traction control come on less frequenly (less sensitive) on a Sport than a SE because it has LSD to keep the wheels spinning @ correct speed while cornering thus less slipping more grip..?

The diff is there because as you say the wheels need to go at different speeds around a corner (the outside one has to travel further). With a normal (open) diff, if you're cornering hard then what can happen is that the inside wheel is very lightly loaded due to weight transfer, so virtually all the power might end up going to that wheel since it can spin a lot faster, which means you lose the power because it doesn't get put down on the road properly.

Your question is a good one and I can see your thinking. Unfortunately I don't know the specifics of exactly how the TRC works on the IS200 to be able to comment on that. For example, does it just work front-to-back (i.e. detects if the back wheels are spinning faster than the front ones, indicating wheelspin at the rear through lack of traction), or does it work side-to-side (as in your example) too ?Perhaps someone else might know more ?

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I believe the TRC in the IS200 uses the ABS sensors to see if there is wheel spin (detected as wheel spinning faster than actual road speed) and then cutting/limiting power produced by the engine untill the wheel spin has stopped.

I suppose this would mean the TRC is less likely to cut in with the LSD as there will be less inside wheel spin on hard cornering due to power transfer from the diff.

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