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Thread: castor

  1. #1
    Glenn ke_70's Avatar
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    Default castor


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    i hav a fair idea what it is but can some 1 tell me how it helps with different set ups like drift and grip would i want as much + castor as i can possibley get and are there and disadvantages?
    cheers

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    Senior Member *E7*'s Avatar
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    caster helps your wheels return to straight after turning.

    caster adds camber the more you turn your wheels. (think like a grader or mercedes or beemer) next time you see one parking, check the camber angle when they're on full lock.

    experiment to find the best settings for your own requirements, but a reputable track related suspension shop should be able to give you some good ideas.

    alternatively google the subject as there is pages and pages of info out there.

    -dave

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    castor: basially its the angle of the strut when looking side on the car.

    positive castor is the bottom of the strut (the wheel)pulled foward. positive castor is what you want.

    positive castor creats what is known as "dynamic camber" basically as you turn your wheel it will tend to lean over (camber). the outside wheel going more negaive and the inside wheel becoming more positive camber. there are varying oppinions as to what is the best, but it basically comes down to personal preference. castor is a good way to get some negative camber as you turn the corners, but still retain close to zero static camber with the wheels straight. saves on tyres (less camber = less camber wear) also helps with straight line braking (bigger contact surface on road)

    i currently run zero castor on my car with -2 degrees of static camber. implications of this is that the steering wheel is quite light, but at high speeds the car can be a bit floaty. positive castor tends to "pull" the wheels back to the centre, which makes for a bit more stability at high speed, but it also makes the steering heavier at low speeds (since the wheels are being forced to lean over)

    most guys on here will say "MAX IT OUT FOR MAXIMUM DRIFT" i tend to disagree with that comment. i do however belive that +3 or so would be good on a street car to keep the stability and get that increase in camber that we all love. i will one day get around to getting another wheel alignment, but at the moment it does me good.

    there is one decent arguement for "MAX CASTOR" being that in drift, the initial yank of the steering wheel can produce that much weight transition to the outside wheel thus being able to utilise the uber crazy amount of negative camber that is gained from using so much castor (once the wheels are turned that is). but im yet to come across any solid info to back this up.

    edit: cheers mr E7
    Last edited by ke70dave; 14th May 2009 at 09:40 AM.

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    Senior Member *E7*'s Avatar
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    Quote Originally Posted by ke70dave View Post
    i currently run zero castor on my car with -2 degrees of static camber. implications of this is that the steering wheel is quite light, but at high speeds the car can be a bit floaty. positive (camber) castertends to "pull" the wheels back to the centre, which makes for a bit more stability at high speed, but it also makes the steering heavier at low speeds (since the wheels are being forced to lean over)
    fixed. its late i know

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    Run 3.5 on the stock rods (full adjustment)

    If you want more, get rosejointed setup.

    Caster is good.
    RT142 Estate.

    AJPS.

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    Senior Member resol's Avatar
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    huge amounts of castor in drift does mean the wheel is heavier, which is a trade off. but means you can turn in then flick the wheel it into opposite lock. then when you straightening up or swaying you just flick it back the other way and repeat.

    so mean a lot less wheel work. which is why i love it!


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    Glenn ke_70's Avatar
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    wot about tyre wear? that the main thing im worryed about

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    i run +6 castor, maxed out Dmax rods. love it, daily driver (litterally) that goes to the track (drift) a few times a month, tyres last fine as long as your alinment is spot on. its kinda suited to your style, just try it out and see if you like it

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