@ Theboy
More Castor = more stability at speed but not without consequence..... Unlike a shopping trolley a car holds other needs, these being real thrust, inertia and the need for the steer axis to lean.
The Omega has a very aggressive static front camber position due to the length of it's suspension radii, it's very fluid and works well initially? As we all know over time the coils will relax and allow a more dynamic geometry and thus the complaints about excessive tyre wear..... The simple solution would be to reduce the static camber position and belay the dynamic gains.
But..... The camber and castor have a relationship on the corner..... This is not a sneaky kiss it's about how much the camber will lean during the turn? Each of the cars steering pivotal points are off-set allowing some ( out-of-sight ) things to happen during a turn but remember these need to be in controlled position's.....
Turn left the NSF camber will lift outside of the car moving the camber toward positive, during this transition the OSF camber will drop inside of the car toward negative. The rate or let's say amount this happens is due to the castor position and it's pivotal point at the steering arm?
On the Omega the steering arm ends, or track rod ends have a bend in them, this bend pivots the pick-up on the inner wheel toward the wheels centre and in doing so the inner wheel has an accentuated the lock angle. It's ability to promote this extension depends on the castor position.
So in summery adjusting the castor is as important as adjusting the camber because the camber position is just as important on the corner as it is on a straight line....
Further research....For those that might like this sort of topic, some years back i was approached by the Lexus Owners Club asking me for a solution for the Lexus IS200/ 300/ 300sc front tyre wear problems. As it turned out the problem was the none adjustable front castor position.....Or was it?>
http://www.google.co.uk/search?client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&channel=s&hl=en-US&source=hp&biw=&bih=&q=lexus+front+tyre+wear&btnG=Google+Search&oq=&aq=&aqi=&aql=&gs_l=
Author
Topic: Geometry Castor adjustment, can it be done? (Read 2342 times)