Lower Control Arm Bushing. Which offset?
05-13-12, 08:19 PM
#1
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Lower Control Arm Bushing. Which offset?
Hey guys,
I'm replacing my lower control arm bushing but there seems to be 3 available options on sewell lexus. Do any of you know what the offset actually does and which one I should purchase?
2007 Lexus IS250 RWD
I'm replacing my lower control arm bushing but there seems to be 3 available options on sewell lexus. Do any of you know what the offset actually does and which one I should purchase?
2007 Lexus IS250 RWD
06-05-12, 12:58 PM
#7
Castor :
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.
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.
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06-06-12, 04:30 PM
#8
Castor :
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.
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.
06-07-12, 04:25 PM
#9
Here's some more detailed info on the benefits on + caster :
Increased dynamic negative camber in turns
Improved high speed stability
Improved road feel, steering feedback and sensitivity
Increased steering weight, this can be used to overcome some over compensating power steering systems
Improves steering turn-in response during corner entry
04-15-20, 07:01 PM
#10
I haven't found any.
Here's some more detailed info on the benefits on + caster :
Increased dynamic negative camber in turns
Improved high speed stability
Improved road feel, steering feedback and sensitivity
Increased steering weight, this can be used to overcome some over compensating power steering systems
Improves steering turn-in response during corner entry
Here's some more detailed info on the benefits on + caster :
Increased dynamic negative camber in turns
Improved high speed stability
Improved road feel, steering feedback and sensitivity
Increased steering weight, this can be used to overcome some over compensating power steering systems
Improves steering turn-in response during corner entry
Last edited by davidbusta; 04-16-20 at 10:12 AM.
04-16-20, 03:30 AM
#11
If you’re just daily driving your car , go with zero.
04-17-20, 04:48 PM
#13
Changing topics slightly: if anyone wants to know what negative caster feels like just back up way fast and steer. Its super light.
The downside about 8+ degrees of caster is that when at low speed on a banked incline, the car wants to fall in the ditch so you have to steer away even if going straight.
Let me know if you have questions, spent 6 years doing it!
11-04-20, 12:24 PM
#14
Driver School Candidate
I’ll be picking up a 18 IS350 this weekend and wanting to order these. Just verifying you guys are ordering 1 of each unique part number, right? Sorry for the dumb q
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