displaying posts 1 to 4 of 4

Author Subject: steering 're-aligning'
lewisdmz

Senior User

Location: plymouth

Registered: 25 Jul 2009

Posts: 504

Status: Offline

Post #1
i just had 2 new wishbones put on as it felt a bit loose up front and it turned out both the p bushes were completely f**cked.

anyway, since it's been done the steering feels a bit heavier in general and also if you turn a right angeled corner for instance i almost have to straighten the wheel up myself where as you used to be able to let it slide through your hands.

i haven't had the tracking done yet so do you think this is likely to be the cause.

(after a quick google before posting this i believe it may be caster which is causing this).

cheers.
Posted 3rd Jan 2010 at 06:43
phillipm

Seasoned Pro

Location: Rotherham

Registered: 15 Oct 2006

Posts: 20,607

Status: Offline

Post #2
Nah, it'll be the tracking, get it checked and setup and see where it goes from there

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Posted 3rd Jan 2010 at 16:37
lewisdmz

Senior User

Location: plymouth

Registered: 25 Jul 2009

Posts: 504

Status: Offline

Post #3
"Castor is a little more difficult to understand.
Looking at the car side-on, imagine an axis
line drawn through the steering axis of the
wheel, so on a car with a McPherson-strut this
line would be straight along the vertical axis of
the strut. Positive castor occurs when the top
of the axis line tilts more towards the rear of
the car (the green line in the diagram).
Negative caster is the opposite (the red line).
The benefit of positive caster is that it
provides good self-centering of the steering,
allowing the car to travel in a straight line
without constant holding of the wheel.
Increasing negative caster will increase
steering effort, weight and feel at the expense
of self-centering. "

Negative castor it is then. The balljoint's on the old wishbones were loose as a whores asshole as well.

Does anyone know if this is beneficial? I was thinking I had to fight the car a bit to keep it straight on the country roads. But then this does give it more 'feel'. I sort of like it in a way. And castor has no affect on tyre wear so...
Posted 3rd Jan 2010 at 20:40
cress87

Seasoned Pro

Location: Norwich

Registered: 30 Mar 2007

Posts: 11,360

Status: Offline

Post #4
I don't think you need to explain steering/suspension geometry to Phil. LOL

Increased castor angle may well have that effect but so can incorrect wheel allignment. Besides, fitting new P-bushes shouldn't affect castor angle.

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Posted 3rd Jan 2010 at 20:46

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