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Can someone explain castor? 

 

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 Post subject: Can someone explain castor?
Posted: Wed Jan 25, 2006 10:29 pm 
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Hi guys just had front wheel alignment done alls well but the guys at Bob Jane said that they could only adjust my castor to max and got these readings.

Left +3*18'
Right +3*28'

He said that my Left wheel sat a fraction behind my right wheel and that they adjusted it as much as it would go and that it wouldnt be a problem
but the car would sill pull a bit to one side. He said the solution is a castor Kit. What is it and is it easy to do? I just did my stub axles and that was a piece of piss. And I assume I will require another wheel alignment after this.

 

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Posted: Wed Jan 25, 2006 10:30 pm 
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Your cars lowered?

 

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Posted: Wed Jan 25, 2006 10:36 pm 
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noisuf wrote:
Your cars lowered?


Only Factory XR suspension.

 

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Posted: Wed Jan 25, 2006 10:45 pm 
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Castor is the amount of tilt in degrees from vertical of the spindle when viewed from side view.

There is more to it than just castor. If the setback is within spec then you should have no problems. That castor spec is still OK, although not perfect.
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Posted: Wed Jan 25, 2006 11:25 pm 
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Last edited by blackjack_original on Fri Jun 06, 2014 8:12 pm, edited 1 time in total.

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Posted: Thu Jan 26, 2006 12:48 am 
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also cast helps return the steering wheel to the straight ahead postion


if u have a non xr with xr spec suspension a camber castor kit is needed

bassically allows for more movent of the suspension arms

pretty easy to install

 

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Posted: Thu Jan 26, 2006 8:38 am 
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This may help you
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Posted: Thu Jan 26, 2006 9:28 am 
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Disco Frank wrote:
also cast helps return the steering wheel to the straight ahead postion


if u have a non xr with xr spec suspension a camber castor kit is needed

bassically allows for more movent of the suspension arms

pretty easy to install


i have xr springs in my fairmont and it doesnt require a caster/camber kit

i thought only if u went to superlows is when it is required

 

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Posted: Thu Jan 26, 2006 10:28 am 
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So do u need a castor kit when fitteing superlows to an EF gli?
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Posted: Thu Jan 26, 2006 12:16 pm 
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Pulco wrote:
Disco Frank wrote:
also cast helps return the steering wheel to the straight ahead postion


if u have a non xr with xr spec suspension a camber castor kit is needed

bassically allows for more movent of the suspension arms

pretty easy to install


i have xr springs in my fairmont and it doesnt require a caster/camber kit

i thought only if u went to superlows is when it is required



depends on many factors..
the camber castor kit is just longer bolts :)

if the suspension and joints are in good nick then a kit may not be needed
as only a small adjustment is needed

but say your joints are a bit worn or a suspension arm is slightly bent ( which u cant tell ) then a kit is needed to get the correct specs in the alignment

 

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Posted: Thu Jan 26, 2006 2:55 pm 
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blackjack_original wrote:
Easy way to explain castor is if you visualise motorbikes... look at the difference in the angles of the forks between a chopper and a sportsbike. It affects your stability. More positive caster, more stable the car is.


thats rake not caster

 

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Posted: Thu Jan 26, 2006 3:12 pm 
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Posted: Thu Jan 26, 2006 3:21 pm 
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I've just lowered my EB1 with kings super lows,and it definitely required a camber and castor kit-(about $230 at Bursons)-cheaper if you have a trade account.The kit has longer bolts,with a large supply of shims,as when you lower the car,the top of the wheels fall inward towards the car-just like super tourers.This is no good for street use as it wears the tyres on the inside-hence the camber and castor set to correct the situation

 

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Posted: Thu Jan 26, 2006 3:56 pm 
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madmax wrote:
This may help you
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thats a much better way of explaining it ... handy pic mate

 

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Posted: Fri Feb 10, 2006 12:48 am 
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you need more positive castor on the left side and the camber to be slightly more positive on the right to hold the camber of the road. 7 out of 10 EA to ED's and 5 out of 10 EF/EL's needed kits in standard form.

 

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