Torque Steer

[kent_andy]

stupid question, but what is a TD1 flag?

[almoRS]

It's a new comment that goes onto the service record at the dealer if the car has been modified in a particular way i.e. the ECU. Local tech I spoke to said it may no difference to him but understands why Audi might set it to cover warranty if you re-map engine and it blows etc.. Let's not open that debate again!

[Shinobi675]

It's a new comment that goes onto the service record at the dealer if the car has been modified in a particular way i.e. the ECU. Local tech I spoke to said it may no difference to him but understands why Audi might set it to cover warranty if you re-map engine and it blows etc.. Let's not open that debate again!

But surely even with a td1 the warranty would still cover the quazy modo flip flop! A friend of my mates says they replaced his 3 year old with a brand new car when his flip flop went! The new car doesn't cry anywhere near as much.

[10biscuits]

back on the old torque steer thingy again,i'm still getting humungous amounts on hard pushing,kinda got used to it--but excuse my total ignorance--but what is alignment-is it the tyres or what-this seems like a very interesting idea-especially after the comments from the guy with the B8-I had a B8 before I got my C7 in March and the B8 was hugely stable,no sign of what I get on the C7 now.

[b7rs4saloon]

I get this on worn pirellis

I am waiting for a set of super sports to be delivered.

The 285 30 21 100y are on back order for weeks, however stock was available
on 295 30 21 101y so I have ordered them. Lots of ppl who run aftermarket wheels opt for that size and they should mount on standard rim fine. The other deciding factor was nearly £100 less a tyre! That is ridiculous!

I will report back in a week or so once fitted

Scott

[almoRS]

back on the old torque steer thingy again,i'm still getting humungous amounts on hard pushing,kinda got used to it--but excuse my total ignorance--but what is alignment-is it the tyres or what-this seems like a very interesting idea-especially after the comments from the guy with the B8-I had a B8 before I got my C7 in March and the B8 was hugely stable,no sign of what I get on the C7 now.

Alignment is adjustment of the angle of the wheels on a car: https://en.wikipedia.org/wiki/Wheel_alignment. However I would also recommend you get the tyre balancing checked as I've hardly noticed it since having 2 new front tyres (only 2MM difference) and all 4 with new balance weights.

[10biscuits]

Many thanks Almo, taking mine in for a health check before I disappear on a long road trip, will have a word about this and see what they say and report back

[MikeFish]

back on the old torque steer thingy again,i'm still getting humungous amounts on hard pushing,kinda got used to it--but excuse my total ignorance--but what is alignment-is it the tyres or what-this seems like a very interesting idea-especially after the comments from the guy with the B8-I had a B8 before I got my C7 in March and the B8 was hugely stable,no sign of what I get on the C7 now.

Alignment is adjustment of the angle of the wheels on a car: https://en.wikipedia.org/wiki/Wheel_alignment. However I would also recommend you get the tyre balancing checked as I've hardly noticed it since having 2 new front tyres (only 2MM difference) and all 4 with new balance weights.

Were your new tyres the same make and model as the old ones?

[almoRS]

Yes. Dunlop R01s

[10biscuits]

starting to join in with the tech stuff now---so, if the alignment was out-would you get uneven tyre wear. Done 4k in my car,on Dunlops as well
if the wear was more on one side than the other--is that a pointer

[GLM]

yes, but also if tyre pressures are not even or too high/low that will also influence the wear, so worth making sure tyres are inflated as required as a first point of call.

[innercry666]

So, I had my RS4 geometry aligned by a specialist yesterday and I have to say that the problems experienced with the RS6 that come across as 'torque steer' when particualrly when making overtaking moves will most likely be down to suspension geometry.

Had a test drive before any work was completed with the specialist driving the car over a very well know prescribed test route assessed how the car handled and it picked up on a number of handling charachteristics identified by RS6 owners. Tests included:

- Slow speed test with the steering wheel straight
- 50mph speed test to see how the car behaves
- Acceleration tests with a variety of roads to see which way the car wants to steer under hard acceleration (This would be exagerated in the RS6 with much more torque and wider tyres)
- 'A' road with a 'standard' amount of camber to the left
- 'A' road cambered to the right
- Steering test around a fairly small roundabout - the car was chucked in and we went round a couple of times to see how the front and rear of the car worked together and how much the stability control kicked in
- Bumpy B road - point the steering wheel straight and it should go straight with the suspension absorbing the bumps

The specialist identified that in some instances the car would have left slip and in some instances right slip - to me the car felt 'confused'! Overall a lot of the comments and seeing how the car behaved are very similar to the comments with respect to torque steer and instability when making overtakes under hard acceleration.

From the test drive and a look at the before adjstument measuremets the specialist identified :

- Higher Caster Front Right vs Front Left - Influences car stability. In this instance particualrly when crossing over the crown of the road from left to right makes it less stable.
- Higher camber front left - tendency to push the car to the right to oppose left biased road camber
- Toes were not even at the front or the rear - Front and rear of the car were in opposition to each other - (higher front right toe and higher rear left toe) Under hard acceleration the car was being steered from the rear.

So if your RS6 handles in a similar way the goemetry could well be the culprit.

Considering this is the way Audi aligned the car only a month ago it's pretty poor and suggests that in this instance they had no idea what they are actually doing. Apparently Audi and other manufacturers don't geo all the cars before they leave the factory. They are set-up 'by eye' with only a small sample being tested to demonstrate that the 'by eye' setup is delivering an in-spec alignment. Also dealers including Audi have time limits within which to work to complete an alignment and apparently are incetivised to deliver an alignment quicker than the alloted time!

Overall the experience was very informative and explained fairly clearly why the car behaved as it did. The car has been fully reworked and now handles much much better than it did, particularly when making overtakes under hard acceleration!

So the car now has:

- Equal toe at the rear - aligned to the long axis of the car
- Equal toe at the front - greater than the rear to give a bit more 'front end' to the car
- Front Camber almost equal but slightly higher front left than right
- Rear Camber equal
- Caster higher on the left than the right

I had it set up for regular day to day driving with a reasonable amount of stability built in. The car feels much more balanced and behaves much more predictably. Definately worth the time and expense to get the car setup properly to get the most out of it.

If your RS6 doesn't handle how you expect, certainly when making overtakes under hard acceleration or crossing over the camber of the road, it could be well worth getting an alingment specialist to set the car up.

Hope it helps...

[marksmithson9846]

I do get it on Conti's on hard acceleration may try Michelins next time

[vestax32]

Did anyone get to the bottom of this?

[Bit_evl]

Have you checked your tracking and alignment ?