Steering wheel position oddities — camber, alignment, or RAS? (4S CT, MY25)

[Taycan18]

Trying to work out if I’ve got a minor alignment/RAS quirk or just UK roads being UK roads. Keen to hear what others see.

On motorways at 70 the wheel sits maybe 3° right of centre to hold straight. Direction-wise that’s consistent with our left-falling camber. On right-falling sections it reverses, but by what feels less (maybe 1-2 degrees versus 3-4 the other side, but maybe that’s my imagination). The problem is there are so few roads here to test this on.

The other thing I’ve noticed: in a gentle left bend on a left-cambered road, the wheel sits dead straight where I’d expect it to be turned slightly left. Slightly uncanny feeling, like the car is steering itself round.

No pull torque — it never fights me or drifts when I loosen grip, the wheel just sits where it sits. Tyre wear even, pressures matched.

Questions for the group:

1. Anyone else notice their wheel sitting two or three degrees right when tracking straight in the UK?
2. That “straight wheel through a left bend” sensation — normal camber physics or a RAS thing?
3. Anyone had the RAS zero point / geometry checked under warranty — did it change the feel?

Car is a MY25 4S Cross Turismo with rear-axle steering, recently purchased Porsche Approved, so it’ll go back if it’s a real fault. Just don’t want to book it in for what turns out to be “that’s every car on UK roads, sir.”

The pull on motorways somehow just feels much more pronounced than all the other cars I am used to. I wonder if it’s a function of the weight and the very direct Porsche steering or alignment out.

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[tophamn]

Trying to work out if I’ve got a minor alignment/RAS quirk or just UK roads being UK roads. Keen to hear what others see.

On motorways at 70 the wheel sits maybe 3° right of centre to hold straight. Direction-wise that’s consistent with our left-falling camber. On right-falling sections it reverses, but by what feels less (maybe 1-2 degrees versus 3-4 the other side, but maybe that’s my imagination). The problem is there are so few roads here to test this on.

The other thing I’ve noticed: in a gentle left bend on a left-cambered road, the wheel sits dead straight where I’d expect it to be turned slightly left. Slightly uncanny feeling, like the car is steering itself round.

No pull torque — it never fights me or drifts when I loosen grip, the wheel just sits where it sits. Tyre wear even, pressures matched.

Questions for the group:

1. Anyone else notice their wheel sitting two or three degrees right when tracking straight in the UK?
2. That “straight wheel through a left bend” sensation — normal camber physics or a RAS thing?
3. Anyone had the RAS zero point / geometry checked under warranty — did it change the feel?

Car is a MY25 4S Cross Turismo with rear-axle steering, recently purchased Porsche Approved, so it’ll go back if it’s a real fault. Just don’t want to book it in for what turns out to be “that’s every car on UK roads, sir.”

The pull on motorways somehow just feels much more pronounced than all the other cars I am used to. I wonder if it’s a function of the weight and the very direct Porsche steering or alignment out.

Doesn't sound right to me - mine doesn't do that. I'd get it checked out.

 

[r553]

Have you had a 4 wheel alignment? If you have it done at an independent garage you will likely need the special tool to adjust the rear toe, VW tool T90009. When the car is off the RAS points straight ahead. My car has RAS and that hasn't been an issue. Aftermarket versions of the tool are also available online. I can't stand paying $600 for an alignment from the dealer when my independent garage charges less than $200. Good luck.

 

[tophamn]

I’ve tried to capture the pull to the left on video, you can see how much it reacts to the camber in the road.

I can't see in the video: do you have Active Lane Keeping or Lane Keep Assist on?

 

[SoccerMan94043]

I’ve tried to capture the pull to the left on video, you can see how much it reacts to the camber in the road.

Based only on the video, that could easily be the road or the tires.

 

[chun]

I’ve tried to capture the pull to the left on video, you can see how much it reacts to the camber in the road.

You're driving on the white line from the looks of it.
Line assist seems to be on, so that will steer you away from it - via lane edge guidance.

This sort of test must be done on straight wide roads, such as autobahns, with all assistance systems off.

If it still happens on an actual straight road, with all assistance off, you need to take notice if the car actually goes left or just the steering wheel. The steering wheel not being centerd could also be a cause.

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