>And...why would you want to change castor? I'll bet your racing experiences
>will show us all why. For street applications, you wouldn't need to touch
>it unless there was frame damage and something wasn't right to begin with.
>Regards,
**************************************
Actually you wouldn't normally want to change castor unless it was out of
spec. Castor has many effects but mainly it influences the ability of the
steering to center itself (like when you let go of the steering wheel), the
car to track in a straight line (not wander) and to some extent steering
feel. Look at it this way, invision the wheels on the front of a typical
shopping cart. With this castor setting, the axis of the vertical link
passes *before* the contact patch of the wheel, this wheel (when pushed
from behind) wants to track or follow the vertical link. The further in
front the more it will track in line (and the harder, effort wise, it is to
turn). If, on the other hand, you switch the axis to after the contact
patch of the wheel, it becomes easier (effort wise) to steer, but will
become much more twitchy and if moved far enough back will not track at
all, but try to reverse itself. (is this sounding clear, or am I muddying
things up further??)
Barry Schwartz in San Diego, CA
Bschwartz@encad.com
72-V6/5sp Spitfire ( daily driver )
70 GT6+ ( when I don't drive the Spitfire )
70 (sorta) Spitfire ( project )
73 Ford Courier ( parts hauler )
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