Handling question - issues with an RS6 having come from a B8 RS4...

[Ian_C]

Ian, was this the thread you were talking about?

viewtopic.php?f=76&t=120887

Yes, I think that's the one. Your set up halved the rear toe-in.

[MikeFish]

And had the geometry checked?

Mike - post a link to your geometry thread.

General consensus is to remove the factory rear axle toe-in, which reduces understeer when cornering, and removes the 'rear steer' affect when you floor it in a straight line and the cambers/catseyes/white lines cause one wheel to lose grip slightly and the other wheel (with toe-in) steers the car as a result. Even going from 0.2 degrees toe-in per side back to zero makes a big difference. Mikes thread has much more info.

That is very interesting. I spent years on supras getting the geo right - it was absolutely critical. I assumed that with the electronic power distribution systems in these things it didn't make much difference, as my old supras were 100% mechanical only.
The geo files will be the audi stock geo - as it was done by them before I bought it.
One of the reasons I went to the RS4 was the fact I never had to mess around with it at all - I was sick of spannering around.

I'll book it into Audi and see what they say first, my instinct is that it's inability to put any decent power down on exit is a diff related issue. I just hope the mechanic understands these things properly and doesn't just plug a machine in that says 'no fault'.

Oh was the geo checked by Audi? Did they give you a print out of before and after? If it was Audi that checked it then personally I'd take it to a reputable independent with the Hunter set-up and get it checked 'properly'.

[MikeFish]

Ian, was this the thread you were talking about?

viewtopic.php?f=76&t=120887

Yes, I think that's the one. Your set up halved the rear toe-in.

Made a huge difference. Now I've had the height changed again I need to get it adjusted again. Just need to find time between dropping kids off and picking them up to take it in.

[MikeBirt]

interesting about the camber - I have no idea who did it but I have a local firm that have all the latest equipment including force balancing machines so, like I did with the 4, I'll take the 6 there after reading up on that geo thread.

Last night I went out again to have another look at some different config setups. (I have DRC on the car)
With everything in dynamic it was again lurching all over the place and shutting throttle down, as before, but this time I got the feeling that the car was 'hopping' as the tyres were gripping, then losing it and hopping to adhere again, not sliding. Even under no throttle is was doing it a bit so I did a few more attempts on auto suspension setup and it was better, much less hopping and the car was a bit more settled with the ecu pulling less throttle.

...so then I put the suspension in comfort and had another go. Result? no hop at all, smooth sliding and handling like I would expect.. You can feel the car settle down and the diffs control the yaw. There was a bit ow nose dip and tail dip in and out of the corner, but laterally, fairly level.
The balance was neutral I felt, slightly more understeer than the 4, but then there is a lot more power to deal with, but the car was acceptable.

So I think the geo & tyre setup may be the cause.
6 has P zero, and from memory the 4 had Dunlop SP sport on..
Checked the m this morning and the car is eating these P zero.

below shots of tyre, wear and the best setup I could find.

[Markp]

Auto is the best setting for suspension in everyday use. Let the car decide what is required. And get a geo pronto.

[MikeFish]

I don't like auto. I want to know what the suspension is doing when I going into a bend. I find auto too unpredictable.

[Markp]

I don't like auto. I want to know what the suspension is doing when I going into a bend. I find auto too unpredictable.

I always used it in my 6. Works better in my current 4 though. Feels like it is in dynamic most of the time but slips to comfort when you are going slow. Dynamic was too hard in the 6 for the roads around me.