smart51
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| posted on 24/5/07 at 07:00 PM |
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oversteer balance
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?
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Mark Allanson
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| posted on 24/5/07 at 07:05 PM |
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Is this with or without a passenger? Makes a hell of a difference
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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smart51
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| posted on 24/5/07 at 07:15 PM |
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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.
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britishtrident
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| posted on 24/5/07 at 07:19 PM |
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First stop corner weights
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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kipper
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| posted on 24/5/07 at 07:24 PM |
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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.
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rusty nuts
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| posted on 24/5/07 at 08:12 PM |
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Start with the corner weights, made a big difference to my car.
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andylancaster3000
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| posted on 24/5/07 at 08:36 PM |
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Another vote for corner weights. It can transform a car.
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Ivan
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| posted on 24/5/07 at 08:50 PM |
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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.
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smart51
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| posted on 25/5/07 at 07:06 PM |
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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]
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