I would think that the 180B camber pins are alsoa cause of the problem as
these wonders of engineering can move your arm pivot to a different height
than your tie rods. Result = bump steer
Cheers
Feral Errol
mailto:[EMAIL PROTECTED]
http://www.datrats.com.au/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Richard Clough
Sent: Monday, April 30, 2001 8:23 PM
To: [EMAIL PROTECTED]
Subject: Re: Re:FRONT END GEOMETRY
Your wheel/tyre/suspension combo sounds very good and the grip is probably
amplifying your bump steer. It sounds like your main bump steer problem is
the inner hight of the control arms and you are going to swap in the 68
cross member to address this. Do this first and realign the front end. This
may be enough to remove the bump steer problem as it sounds like it is
occurring only at fairly high bump conditions.
Negative camber and more caster will improve turn in response and increase
cornering ability, at the expense of heavier steering, but shouldn't alter
the bump steer if the front end is properly aligned after these adjustments.
Your suspension/wheel/tyre combo sounds very good so you should be enjoying
great handling when you get rid of the bump steer.
----- Original Message -----
From: "damien cm" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, 28 April 2001 22:22 PM
Subject: Re:FRONT END GEOMETRY
> Listers
>
>
> Recently I was reading archives on front end geometry. This research has
led
> me to even more questions. Currently my 68' 1600 has 200B struts, 70' 1600
> cross member, 180B adjustable camber pins and control
> arms to match. The shocks are Tokico prodrag golds and progressive King
> springs that are 2.5 cm lower than standard. I have 14 inch performance
rims
> with Yokahama A509 205/60/14 tyres. I have replaced the 68' steering arms
> with the thicker ones from a later model.
>
> When I push my 1600 hard through a corner, I experience bump steer.I HATE
> bump steer.
>
> This is my current plan for my front end:
>
> *Replace the 70' cross member with my 68' cross member(higher holes for
> mounting the control arm)
>
> *Replacing the 180B adjustable camber pins for standard non-adjustable
pins.
> My reasoning behind this is that when the position of the joint for the
> control arm to cross member is altered,it disturbs the original front end
> geometry. Apparently, the steering arm and the control arm inner pivot
> points line up, and are of equal length. At the moment, my camber pins
are
> giving maximum camber,therefore my pivot on the control arm is miles away
> from the pivot point where the steering arm joins to the middle section of
> the steering assembly(I think its called a 'draglink'?). The 180B
adjustable
> camber pins also give my car negative castor(control arm sits back due to
> thickness of 180b adjustable camber pin).
>
> *Replace my 200B strut tops with the offset strut tops from a 77' 180B,
> giving me about 2 degree neg camber
>
> *Replace the standard radius rods with adjustable ones. I think they are
> made by SSS. They are not Torana.
>
> *Lower my car.(I'm a sucker for that stealth, sleek streeter look!)
>
> *Eventually put on some tasteful 15 inch rims with low profile tyres.
>
> Am I on the right track? or has my research been in vain? Did I read the
> info correctly,or maybe mis-understood some thing along the way?
>
> I have noticed that the inner control arm bush on the 180B with the
> adjustable camber pins is differnt to the normal ones, is this true?
>
> If someone was'nt fortunate enough to have a 68' cross member at there
> disposal, could they use the adjustable camber pins to have a higher pivot
> point where the control arm meets the cross member??
>
> Does any one in Canberra have any of the 180B offset strut tops for sale?
>
> Where do you Canberra OZDATER'S take your cars for wheel alignments?
>
> I understand that the front end of any car is delicate and any advice is
> appreciated!!
>
> Yours in handling,
>
> Damien.
> _________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
>
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