Do 360s oversteer badly?

[t1grm]

This morning, whilst driving down the stretch of privately owned motorway in southern Spain that I recently acquired the front of my 360 felt very nervous and “pointy” when taking sweeping bends at about 100 mph.

The front end would feel like it dipped down and dug in as I turned into the corner. Normally I would associate this characteristic with oversteer but I thought that only happened when cornering hard with a lot of turn in. On this occasion I was merely setting up the car to enter a long sweeper typical of that you would get on a motorway.

I found I had to work the steering wheel with small inputs to keep the car in its lane through the corner and it felt like the front of the car was dipping and weaving. It was quite an uncomfortable experience and I felt less confident driving the 360 round the corner at that speed than I do when I regularly drive my Mondeo down the same motorway as speeds not much less than that.

I tried with sport mode on and off and it was the same.

The only recent change is I’ve had new rear tyres fitted.

Is this a normal 360 handling characteristic or does the car have a problem?

[ThatPhilBrettGuy]

Going fast on new tyres? Say hello to the scenery.... They really don't work well for the first 100 miles or so.

[tezza]

I found quite the contrary, the car understeers first, though not as those speeds.
In my own testing, over privately owned motorways , I found it incredibly secure at high speeds, even to the point that it seemed to more secure as I accelerated from the apex

[456mgt]

Check the tyre pressures! You just described my car when the pressures were out.

[tony h]

http://video.google.com/videoplay?doc

Is this you ?!

[monge2]

tyre pressure to high in the rears.

[t1grm]

tony h said:

http://video.google.com/videoplay?doc Is this you ?!

Could have been me yesterday morning I was slightly less ragged at the rear though

[5to1]

Whats the surface on the "privately owned motorway" like?

[t1grm]

5to1 said:

Whats the surface on the "privately owned motorway" like?

It's in Spain so the finest black top EU grants can buy of course!

The rear pressures seem a good bet. I didn't check them after the tyres were fitted. Made the mistake of assuming the fitter knew what they were doing.

[combover]

tony h said:

http://video.google.com/videoplay?doc Is this you ?!

How do I save this thing to my computer?!

[5to1]

t1grm said:

It's in Spain so the finest black top EU grants can buy of course! The rear pressures seem a good bet. I didn't check them after the tyres were fitted. Made the mistake of assuming the fitter knew what they were doing.

The reason I ask is, the 360 relies on ground effects for alot of its high speed down force. Inconsistencies in the surface obviously don't help, especially during cornering.

[t1grm]

OK, finally got round to taking the car out again today and checked the rear tyre pressures.

Were they over? Just f’ing slightly! 2.8 bar on the right rear and 2.6 on the left when they should be 2 bar all round!

Last time I trust a tyre fitter to get the right pressures.

So I reduced the pressure and the car handles fine. Problem solved

Thanks for all your feedback folks