I've noticed that my car oversteers more going clockwise than anticlockwise. On an island at 40ish, the car will corner quite well. A bit more and the rear left wheel will squeal and a bit more still and there's oversteer. It is controlable on the throttle or the steering wheel. Turn left, though, and there's more grip. 50ish is not a problem. The car feels more solid and you have to push quite hard to get tyre squeal. even then, it seems to be from both right wheels and the car just steers with no trace of under or over steer.

I've checked and adjusted the ride hights all round. All OK. I've checked and adjusted the tyre pressures all round. I was running 19 PSI cold / 20 PSI hot all round, then I tried lowering the rears by 2 PSI. no difference. The tyres are proxes T1-S and are nearly new but nicely scrubbed all round having about 1000 road miles on them.

Why would a car do this and what should I check next?

Is this with or without a passenger? Makes a hell of a difference

No passenger. The car went to MNR about a year ago, where they set up the geometry. It seemed that my measuring of toe and camber was somewhat out. That isn't to say it hasn't moved since.

First stop corner weights

It could be due to road camber, On right handers the road is falling away from you but lefts you will get more grip. The bikers on here will know all about this.
Regards Kipper.

Start with the corner weights, made a big difference to my car.

Another vote for corner weights. It can transform a car.

Another vote for corner weights.

Also are you sure the toe, caster and camber are the same on both sides. and if it's a live axle car that the axle is absolutely square.

Another not so obvious a thing is are the shock mounts for the front and or rear suspension exactly symmetrical left and right - a few mm difference inwards or outwards can make a big difference to the spring rates seen by the wheel/chassis.

Tried checking corner weights with bathroom scales to see if it is miles out. 3 of the wheels >150kg max for the scales. FL wheel = 107kg. It would seem that there is room for improvement.

I adjusted the FL spring seat up a few turns to see what effect it had, and increased the weight to 130kg whilst reducing the FR to 122. I need bigger scales.

I also adjusted the rear, winding up the rear right 2 turns and the rear left down 2 turns. Clockwise rear end grip is noticably improved. I'll get it done properly. Thanks for the advice.

[Edited on 26-5-2007 by smart51]