LSD

[Mikey16vClio]

Limited Slip Differencial. What is it? Whats it do?

 

[RobFenn]

The clues in the name

 

[clean16v]

The diff is limited? was told(not sure if its right) that another way fo creating the same effect is by welding 2 of the 4 plates in a standard diff. Basically it puts roughly equal power to both wheels, on normal diffs, its difficult to get both wheels spinning

 

[RobFenn]

Anyway basically ASFAIK its kind of like a clutch in operation where it allows so much torque or power through, a progressive amount of slippage, stopping wheelspin.

 

[rockport]

with LSD i was told that if a wheel comes off the ground, say for instance when going round a bend.. the power if forced to the other wheel!! in turn ripping the steering wheel from your hands. very good on a smooth race track, not so could on bumpy country roads... tho i could be talking complete bollox as this is what i was told from a mate who drives a modded SAAB AREO (with LSD) in which was race preped by Aborts Racing..

 

[Frosty]

Kind of.

It will only let one wheel turn a predefined amount faster than the other before it starts to pull the other wheel with it.

There are loads of factors and parameters for a LSD. How much slip is alowed, how quickly to accelerate the other wheel etc.

 

[clean16v]

RobFenn, that is what i thought, but been told it is not that, its just putting equal power to both wheels. Although what you said and what i believed bfore some mechanic told me i was wrong makes much more sense dont you think? Maybe we could design somat like that? make millions!!

 

[clean16v]

Thsi might sound stupid but what is actually slipped? is it the differencs in power between the two wheels?

 

[RobFenn]

Im confused now

 

[BenR]

LSD limits tha miniumum and maximum amount of power available to any one wheel at any one time.

In a normal diff, the wheel witht he least grip get the most power. jack a car up, stop one wheel, and apply throttle, the other free wheel will spin up with relatively little force on the locked wheel.

And lsd is rated in may ways in many countries, i live to use the % rating as its far easier, japs prefer the odd 1/1.3/1.5/1.7/2.0 etc etc.

And lsd will stop a wheel spinning up all its power, by limiting is max power. i.e. a 60/40 diff will only allow a mac of 60% to any one wheel.

Welding a diff locks its solid and makes each wheel turbn at the same rate with the same power......not the best, but better than none.

 

[RobFenn]

Super Ben strikes again!

 

[Steveold]

Lol the Jap version of the CTR has LSD but the UK version does not have it.... They do think it will have it soon though so I will wait till then coz LSD is the best thing since sliced bread for getting the power down without wheel spin

 

[Frosty]

You only have to look at the Focus RS to know thats not always true!

 

[Steveold]

Ahhh but that has a special dif.... its lsd but been played round with... And if you read the reviews its brillient on the track but a handful on the roads... I want a car thats quick round corners dont care if it darts all over the place lol... besides I have not read that any other car with LSD does that....

 

[Mikey16vClio]

Good debate. Keep it coming.

 

[BenR]

Quote: Originally posted by Steve on 11 March 2003

Lol the Jap version of the CTR has LSD but the UK version does not have it.... They do think it will have it soon though so I will wait till then coz LSD is the best thing since sliced bread for getting the power down without wheel spin

I find tyres are the best....but thats just my opinion.

The RS uses an ATB which is a highly complecated diff which varies the amount of torque applied to each wheel, its no constant. It judges grip levels if you will.

However, unlike an LSD, if you lift a wheel off the ground, it doent work.

 

[Frosty]

ATB: Active Torque Biasing.

Even the name is complicated. Read how the dif works and youll really scratch your head. It all makes sence a second time through though.

http://www.quaife.co.ukwww.quaife.co.uk

Laurence