It's normal when doing sharp turns?

[marinipersonal]

Quick question, as there's something that I am unable to tell if it's normal behaviour or is something to bother the dealer with.
I'm driving a Leon SC 1.8 DSG. About 21.500 miles at the moment.
When performing sharp turns, if accelerating, the car feels quite dormant, as if the power was reduced.
I'm not mentioning the occasional hesitation when breaking/quick accelerating from the DSG. I mean, when driving down the road at 20, or so, and turning to either side, without breaking, if pressing gas, the car feels numb, then, once passed the turn, the power delivery is as normal.
Tried with and without the tuning box, checked tyre pressure, no idea.
Anyone able to help?
Thanks.

 

[yanivkoval]

It is called Electronic Differential Lock or (XDS)

The XDS electronic differential lock is an extension of the familiar EDL function. However, XDS responds not to loss of traction but to the unloading of the front wheel on the inside of the corner when cornering fast. XDS applies pressure from the ESC hydraulics to the inside wheel to prevent it from spinning. This improves traction and reduces the tendency to understeer. The level of pressure applied ranges from approximately 5 to 15 bar. The impression when driving is similar to that of a limited-slip differential in toned-down form. The precise, one-sided build-up of brake pressure makes cornering even sportier, quicker and more accurate.


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[Ckpearce91]

It is called Electronic Differential Lock or (XDS)

The XDS electronic differential lock is an extension of the familiar EDL function. However, XDS responds not to loss of traction but to the unloading of the front wheel on the inside of the corner when cornering fast. XDS applies pressure from the ESC hydraulics to the inside wheel to prevent it from spinning. This improves traction and reduces the tendency to understeer. The level of pressure applied ranges from approximately 5 to 15 bar. The impression when driving is similar to that of a limited-slip differential in toned-down form. The precise, one-sided build-up of brake pressure makes cornering even sportier, quicker and more accurate.


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Isn't the XDS only on the Cupra models though?

 

[kiddo]

No cupra use a system which is able to send power to wheel with most traction. In a traditional open diff power goes to path of least resistance which would be a spinning wheel. The cupra diff senses the spinning wheel and is able send power to the driveshaft of the opposing wheel thus still putting the power down. Not sure of the proper name for it. Its the same principle as a haldex system which detects front end slip and then sends power to rear diff.

 

[yanivkoval]

The Leon Cupra is equipped with the Locking Differential.

A differential compensates for the difference in wheel speeds on the driven axle.

The wheels on the same axle turn at different speeds when a vehicle is cornering because the wheel on the inside of the bend has a shorter distance to cover than the wheel on the outside, causing the outside wheel to turn faster. Compensating for this difference in speeds is generally the task of a bevel differential. A locking differential prevents either wheel from spinning freely, directing the power to the wheel with better grip instead. Speed-difference compensation can then be locked manually or automatically by up to 100 percent. This means that on slippery surfaces up to 100 percent of the engine’s power can be transmitted to the wheel with the best traction.


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[Kane7]

Word of warning don't test a LSD with a tuned engine on anti slip tarmac at 80 it tends to do it's job and breaks a drive shaft at .9G

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[Hughsey]

Quick question, as there's something that I am unable to tell if it's normal behaviour or is something to bother the dealer with.
I'm driving a Leon SC 1.8 DSG. About 21.500 miles at the moment.
When performing sharp turns, if accelerating, the car feels quite dormant, as if the power was reduced.
I'm not mentioning the occasional hesitation when breaking/quick accelerating from the DSG. I mean, when driving down the road at 20, or so, and turning to either side, without breaking, if pressing gas, the car feels numb, then, once passed the turn, the power delivery is as normal.
Tried with and without the tuning box, checked tyre pressure, no idea.
Anyone able to help?
Thanks.

I find this happens on a straight road in my 1.4 dsg 150
I find the pick up really sluggish like the gearbox has disengaged when not accelerating. Is this how DSG works?
Only feels better in sports mode

 

[CupraRobX]

The Leon Cupra is equipped with the Locking Differential.

A differential compensates for the difference in wheel speeds on the driven axle.

The wheels on the same axle turn at different speeds when a vehicle is cornering because the wheel on the inside of the bend has a shorter distance to cover than the wheel on the outside, causing the outside wheel to turn faster. Compensating for this difference in speeds is generally the task of a bevel differential. A locking differential prevents either wheel from spinning freely, directing the power to the wheel with better grip instead. Speed-difference compensation can then be locked manually or automatically by up to 100 percent. This means that on slippery surfaces up to 100 percent of the engine’s power can be transmitted to the wheel with the best traction.


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The Cupra has an open diff and not a locking diff. What it does have is a set of variable friction clutches, modulated by hydraulic pressure from an electric pump, that can change the lockup between one of the half-shafts and the crown-wheel / diff-cage. The golf R and S3 need to take power directly from the front cross axle crown-wheel rather than one of the front half-shafts for the haldex system - with ours only being fwd, this conveniently leaves a nice place for an VAQ e-diff to be bolted into position for the 280/290/300 etc

 

[cliveseat]

Fascinating stuff. Often wondered how an electronic diff worked but was too ashamed to ask. I thought it was down to witchcraft that the Leon felt so good in corners. Makes my TT V6 feel like a truck by comparison.

 

[marinipersonal]

Really appreciate all the responses.
After some more tests, I'm quite sure the problem is the DSG and nothing to do with turning. Possibly, as I tend to (even if slightly) break before the turn, after leaving the turn, when accelerating a bit more, the DSG takes a fraction of time to engage. I may be assuming things, wrong, but the symptoms seems to be the same as the usual hesitation from the slowly breaking/sudden acceleration.
Tried to do the same sharp turns, just reducing the speed, but without touching the break, and accelerating during or just after the turn and no hesitation.
is there anything to improve/sharpen the response of the DSG, or just drive 24/7 in Sport?

 

[yanivkoval]

I own the new Leon 1.8 FR Facelift and noticed this phenomenon immediately.
But it is very rare.

You can try and mess with ESC system by putting it in sport mode or even deactivating it if you can, and try and see if there is any difference.

I apologize for the direct question but Why are you looking into doing sharp turns 24/7 anyway ?



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[marinipersonal]

Possibly I wasn't clear enough. My mistake. The DSG, usually hesitates in the scenario breaking/accelerating, specially at roundabouts. But during the turns, I mean, not driving like crazy, spinning wheel, far from that. Naturally breaking before the bend, then possibly at 10-15 mph and when. Accelerating again, not rushing, the hesitation is longer than in the roundabout scenario. The only way I'm going around that is breaking, then a light touch at the throttle, all before the bend. The hesitation is gone. But I was wondering if there's a reason for the DSG take longer than the usual.

 

[yanivkoval]

I feel the same thing at roundabout. I tried to put everything into spot mode including the ESC and the car behaves differently, no lag or hesitations what so ever but this is not suitable for day to day city conditions driving at all.
To be honest I think that this is the way DSG is designed and we will have to live with it



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