Probably should be ask a tech... but then its more of a modding thread than a problem.

John said earlier that if I'm pushing 1.8bar+ through my turbo I really should get limited slip diff.... ok? So, what is it and how does it work in engineering terms?

I've been under my car a lot recently. so know how the engine & box power the driveshafts, etc etc, but how does LSD incorporate into this setup? Does LSD even exist for the Fabia?

Simple answers please, for a simple brain.

simplest option would be the esp that comes with the Vrs ......if a wheel starts to spin it applies the brakes on that wheel forcing the power to the other wheel......I had it on my octy 130 pd so in theory it should be somewhere on the ecu from your vrs donor car

When you go 'round a corner the wheel on the inside (with no downforce) has little traction and so spins. With a standard open diff all the power will be lost to this spinning wheel. A limited slip diff has a clutch which loosely binds the wheels. Allows enough slip for turning corners, but saves it all being lost in the above situation. HTH?

simplest option would be the esp that comes with the Vrs ......if a wheel starts to spin it applies the brakes on that wheel forcing the power to the other wheel......I had it on my octy 130 pd so in theory it should be somewhere on the ecu from your vrs donor car

Hmmmm, vRS ECU, vRS clocks.... Wonder if it'll just be "there"?

Is there an ESP button in the vRS Fabia too then? Or is it just something that sits in the background? Any actual "mechanical" bits or does it just use the ABS system in the hubs (which I have) ?

edit: TKW - says a lot thanks. Just wondered if such a thing exists then for the Fabia - I can't see anything else extra bolting on down there, so it must be a replacement of something or other.... And its ALL very expensive down there.

Hmmmm' date=' vRS ECU, vRS clocks.... Wonder if it'll just be "there"?

Is there an ESP button in the vRS Fabia too then? Or is it just something that sits in the background? Any actual "mechanical" bits or does it just use the ABS system in the hubs (which I have) ?[/quote']

Not sure about the fabia vrs but I would have thought it would be on there the dash button was only to turn it off/on

The electronic system will not help you on the track very much at all, I think it is intended to help you start in slippery conditions. For a fast corner you'll need an LSD.

Yes ESP has a button on the dashboard in place of the ASR button, do you have that?

Yes ESP has a button on the dashboard in place of the ASR button, do you have that?

I have an ASR button indeed.... Perhaps its essentially the same thing... but different.

I have an ASR button indeed.... Perhaps its essentially the same thing... but different.

only one way to find out ...fire it up and spin the wheels on some wet ground ....nasty orange light should come on on the dash .........keeps doing it on mine ...makes me jump every time

there are mechanical LSD which work like TKW said above, which poeple put on their race cars (focus RS has one) the ESP on the furby has an electronic LSD which brakes each wheel that spins as octygone said, the asr has a torque limiter which tries to stop the wheels spinning (doesn't do a very good job on my furby!) by limiting the torque from the engine....

I have an ASR button indeed.... Perhaps its essentially the same thing... but different.

ASR and ESP are different as far as im aware.

ASR is more like traction control where as the ESP is the full electronic stability program effort which detects slides etc :eek:

ASR and ESP are different as far as im aware.

ASR is more like traction control where as the ESP is the full electronic stability program effort which detects slides etc :eek:

correct , asr is a torque limiter traction control, esp is a stability program, that includes an electronic LSD..........

Not sure about the fabia vrs but I would have thought it would be on there the dash button was only to turn it off/on

Doesn't ESP work on all the wheels (rather than just the driven wheels?) and probably requires extra sensors above and beyond the ABS system as it detects wheel angles, etc to counter slides - it's hard to believe it's an

the easiest way of describing it is the normal furby diff sends power down the path of least resistance ie spinning inside unloaded wheel an lsd sends it to the path of most resistance .

www.howstuffworks.com and type in slip differential

I would imagine there is also an array of additional electronics.

I would imagine there is also an array of additional electronics.

I can see jason cringing in the corner now and reaching for the phone .......ring ring please can i have the rest of the wiring loom and all the sensors :(

Sorry about that jason.....I really do hope that you get sorted soon and I take my hat off to you for trying

The vRS Furby apparently has electronic diff lock - but as mentioned above, I reckon this is just individual wheel braking rather than a diff lock. Go mechanical if you can, but it'll cost as I'd wager there's not one available - a big job too to fit.

Also, bear in mind it will affect the handling of the car, acceleration and possibly even braking depending on setup - check it out carefully first.

I can see jason cringing in the corner now and reaching for the phone .......ring ring please can i have the rest of the wiring loom and all the sensors :(

PMSL

Jason ought to get the rest of the car free I reckon, he's bought most of it already!!

I can just imagine it -

'Morning Mark, It's Jason'

'Morning J, what bits do you need today?' (Mark covers phone and shouts to rest of office "it's that ****ing idiot from Devon again")

Once finished on the phone - Mark says to monkey in the yard, get Jason's car out Nobby, he needs a few more bits.

I don't know a great deal about the system but there is a ring behind the steering wheel to measure it's position.

I think the electronic diff lock would slow the car down, whereas the proper mechanical diff lock would speed the car up when driven to the limit.......

think a diff is about 700Quid up, plus probably thata again to fit as u have remove the box n split it remove the normal diff , and reverse the process

http://www.eiptuning.com/eip/differentials.html

have a peek here i believe the 6 speed box is the o2m type,

ESP prevents understeer and oversteer by braking the relevant wheel, its not standard on the Fabia vRS and doesn't help with putting the power down.

EDL brakes the spinning wheel to send torque to the wheel with more traction, its a bit crude and is really meant for slippery conditions. It only works at slow speeds (Below 20mph on Fords not sure on VAG). In the Fabia brochure I have EDL is standard on the PD100 but not on the vRS. :confused:

It's annoys me that even if you turn off ASR, EDL still operates.

EDL IS NOT AN ELECTRONIC DIFF!!

As for LSD, the most common type is the Viscous LSD, works similar to a torque converter in that if a wheel starts to spin the fluid transfers torque to the wheel with traction. There are also mechanical LSD that work in a number of ways. The most common Mechanical LSD is probably the Torsen diff. Do a search on google but basically it has a mechanical function that transfers torque to the other wheel. They offer better traction than the viscous type because none of the torque is spun away. They are however more violent which is why the Focus does torque steer a bit on uneven and wet roads.

The final type is the electronic active diff as used on WRC cars and some road cars like the Lancer EVO, Skyline etc. The degree of torque lock up and slip can be determined by the driver or computer. It can also be used to send more power to a given wheel to counteract understeer or oversteer, its a the same as ESP but puts power on a wheel instead of braking a wheel.

Cheers

Lee

ESP prevents understeer and oversteer by braking the relevant wheel' date=' its not standard on the Fabia vRS and doesn't help with putting the power down.

EDL brakes the spinning wheel to send torque to the wheel with more traction, its a bit crude and is really meant for slippery conditions. It only works at slow speeds (Below 20mph on Fords not sure on VAG). In the Fabia brochure I have EDL is standard on the PD100 but not on the vRS. :confused:

It's annoys me that even if you turn off ASR, EDL still operates.

EDL IS NOT AN ELECTRONIC DIFF!!

As for LSD, the most common type is the Viscous LSD, works similar to a torque converter in that if a wheel starts to spin the fluid transfers torque to the wheel with traction. There are also mechanical LSD that work in a number of ways. The most common Mechanical LSD is probably the Torsen diff. Do a search on google but basically it has a mechanical function that transfers torque to the other wheel. They offer better traction than the viscous type because none of the torque is spun away. They are however more violent which is why the Focus does torque steer a bit on uneven and wet roads.

The final type is the electronic active diff as used on WRC cars and some road cars like the Lancer EVO, Skyline etc.

Cheers

Lee[/quote']

probably the most consise and accurate answer! lol.....

can't you get 1, 1.5 and 2 LSD's?????? Can on GT4 anyway

Anyone know what the differences are?

can't you get 1' date=' 1.5 and 2 LSD's?????? Can on GT4 anyway

Anyone know what the differences are?[/quote']

When you spec a LSD obviously it needs to handle the power and torque but then you get into how much slipage you will need and the degree of lock up.

Some Scoobs have an adjustable centre diff, you can set the diff from nearly open to nearly locked up. Makes for good traction when the front and rear diffs are LSD as well.

In bad conditions cars with open diffs are virtually one wheel drive, it's no wonder a Scoob is awesome in bad weather.

Cheers

Lee

PMSL

Jason ought to get the rest of the car free I reckon' date=' he's bought most of it already!!

I can just imagine it - 'Morning Mark, It's Jason'

'Morning J, what bits do you need today?' (Mark covers phone and shouts to rest of office "it's that ****ing idiot from Devon again")

Once finished on the phone - Mark says to monkey in the yard, get Jason's car out Nobby, he needs a few more bits. [/quote']

Hi

Now I know why I like reading this forum so much ... good info with humour

keep it up guys

good luck with the project Jason ...... reminds me of when I was building

my cooper S rally car from a bare shell in the 1960`s