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Author Topic:   CASTOR QUESTION
BIGGGFISH
Dirt Full Roller

Total posts: 35
posted October 03, 2001 11:09 AM
WHAT EXACTLY DOES CASTOR DO. AND WHATS THE MOST SOMEONE HAS RUN??

BIGGGFISH
Dirt Full Roller

Total posts: 35
posted October 03, 2001 12:21 PM
ANYONE????

c21
Dirt Full Roller

Total posts: 30
posted October 03, 2001 03:35 PM
I'm sure others may have more to add on this topic, but castor is the axis that each front wheel turns around. It is determined by the relative positions of your upper and lower ball joint. If your upper is farther back you have positive castor (this is what you want on BOTH wheels).
Positive castor has several effects on the car: Because turning the steering wheel forces the outside wheel down (and lifting that corner of the car up) gravity will cause the car to straighten it's wheels helping to stabilize the car. If you run "Castor Split" than you have more castor on your right front (generally 2-4 degrees more) helping the car to turn to the left.
Castor helps a great deal in the corner as your rear-end comes around and you counter-steer, castor forces your right front tire down which in turn tightens you up making your car less apt to spin all the way.
And ... conversely when you are pushing and you turn more to the left, your left tire is forced down which loosens your chassis up a bit.
How much Castor? How hard do you like your steering. Like I said earlier many like to run 2 to 4 degrees more on the right than left and depending on what you race you may be limited as to how much you can get while maintaining the proper camber (don't compromise proper camber), but few run more than 8 degrees on the right.
I run +2 left and +5 1/4 right.
Good Luck

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