[red14]

Not sure why, but a couple of times recently I have experienced "interesting" torque steer at a fairly high speed. and on dry roads.

Dropping into Sport and flooring it I can only describe it as recalling the distant days when I had a Montego Turbo. (That car did it all the time though.)

 

At speeds anything up to around 70 there's nothing - hammer down, you name it. Above that (theoretically of course) it's different.

 

Got a nice set of new MPSS's on the car, all correct sizes on the correct axles and at the correct pressures.

Never bounced off kerbs or anything to upset things.

 

Before I have the wheels off again to give everything the once over, anyone got any ideas?

BTW I do have a wee FSR tuning box on the car but surely it shouldn't have such a dramatic effect.

 

Thanks in advance.

[AudiRS3]

When you put your foot down does the traction come on at all?, one suggestion would be to book in with Audi and see what they say....but might be the Quattro system distributing too much power to the front as opposed to the back or tracking...but just a thought   

[red14]

No traction light, but I note this didn't happen with my much abused winter tyres which were 235's all round - so you may have a point about power distribution.

 

I wonder if there are any issues with aerodynamic lift at higher speeds taking just enough weight off the front? I guess that's maybe taking things too far for now.

 

With long term plans to map the beast, it's something I would need to resolve in due course to avoid brown trouser moments!

[Uncle Fester]

No traction light, but I note this didn't happen with my much abused winter tyres which were 235's all round - so you may have a point about power distribution.

 

I wonder if there are any issues with aerodynamic lift at higher speeds taking just enough weight off the front? I guess that's maybe taking things too far for now.

 

With long term plans to map the beast, it's something I would need to resolve in due course to avoid brown trouser moments!

You say it's only happening since you've changed the tyres so they are the first things you should be looking at,check the tyres are  all on the right way round and take the wheels off and refit ,check the pressures and then try the car.

[red14]

Yeah, checked the "outside" bit was actually on the outside  (again) and I'm being seriously accurate with cold pressures.

I haven't had the chance to get on the M way (at the right speed) since Tuesday though. Will have a go soon!.

 

(Point to note - the beast goes so well after a decent thrash (20+ miles) on the motorway. Cleans the muck out and the effects last for days afterwards.)

[Jmcnamee98]

Are you MPSS all round, what size fronts, what tyres have you come from and did the tuning box go on at the same time as the tyres?

 

Could it be the additional grip from the MPSS allowing the torque steer where worn or inferior tyres previously would have lost traction or traction control would have kicked in earlier?

[red14]

Hi again, MPSS all round, brand new, correct at each corner, 235 front, 225 rear. Was going 255 front but you now have those lol.
Box went on with winter tyres (Pirelli and Bridgestone) and they never lost traction, set the lights off or anything. Odd to be sure.

The only difference seems to be the winter vs summer tyre. I've actually dialled back the box (was on max settings) as I was getting strange full bore gearchanges - a distinct hesitation on change rather than the usual dsg type we all know and love. Seems to have worked.
Traction was never a problem with the old tyres, any conditions. You may have a point in that delivery is now through the stickier tyres but it's a fail dramatic difference.

I had a chance tonight to go very quick (full throttle for at least 10 seconds!) and while the effect wasn't big I could still feel a definite pull to the left. And it's always to the left.

Overall I'm not too impressed with the michelins. Ignoring the current issues, they seem to have taken a long time to settle on the car and as a result I'm less confident pushing on. I'll probably go back to Bridgestone which were perfect on my dear departed 911.

[Uncle Fester]

Try swopping you're wheels from side to side to see if it still pulls to the left.

[P_G]

How many miles have you put in the tyres thus far since having them fitted?

[red14]

Will check but probably only a couple of thousand, maybe three.

Actually, and surprisingly, it's less than 1000. I've been away a lot!

Edited by red14, 26 May 2015 - 03:41 PM.

[AudiRS3]

Before booking the car in with Audi...make sure 

 

1, Tyres are balanced and PSI level is factory recommended. 

2, The car has correct 4 wheel alignment. 

3. Wheels, nuts are at the correct torque pressure. 

4. Tyres are wearing equally and not too heavily....

5. The roads you are driving on are smooth and flat (no dips or levelling problems of the road)

 

Might seem like the obvious, but hopefully should identify the problem.....

 

keep us posted on here and let us know how you get on.....

 

Good luck!