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FD Caster

Old 06-13-05, 11:34 AM
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FD Caster

How much is to much for a full race car?? Any opinions? I am currently running 8.5. With no power steering it is a bear to drive at speed. Thinking 6.5 would make it easier to drive.

What is your set up?
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Old 06-13-05, 06:47 PM
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caster will help keep the wheels straight, and it will resist turning. I have not found an advantage either way. I have tried alot of caster and a minimum and I could not feel any difference. Most people will run maximum caster to help unwind the wheel out of corners, but as long as each side is the same you could be at the minimum. Again I could not feel any diference in effort or performance on my car
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Old 06-18-05, 11:08 AM
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Bump for further discussion.

It seems to me that more caster will increase load on the inside front and outside rear while reducing the other corners'. Wouldn't this potentially reduce traction and/or increase oversteer coming out of the corner? Am I thinking wrong or are the effects just too subtle within our range of adjustment?
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Old 06-18-05, 05:27 PM
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like I said before from the drivers seat I could not feel any difference. If the side to side setting does not match it can affect the car.
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Old 06-19-05, 01:21 AM
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Lower the caster to 6 or 6.5, there is no reason to be running it so high...
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Old 06-20-05, 06:43 AM
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Caster does several things. Additional caster adds additional camber to the front wheels as they are steered, this is usually a good thing. Additional caster also jacks weight diagonally across the car. This weight jacking is what causes the steering to center.

From Mark Ortiz:

http://www.auto-ware.com/ubbthreads/...n=0&page=0#665

Originally Posted by Mark Ortiz
Caster combined with scrub radius causes the car to drop as the wheel steers forward (toes in), and lift as the wheel steers rearward (toes out). When this occurs on the right and left wheels as one steers forward and the other steers rearward, the result is steer roll. The car leans away from the direction of steer. The wheel loads also change. The car de-wedges: the inside front and outside rear gain load; the outside front and inside rear lose load. This effect can help the car turn in slow corners, especially with a spool or limited-slip differential. In excess, it can create low-speed oversteer and over-sensitivity to steering angle. In general, cars running on lower-speed tracks need more steer roll, and cars on fast ovals should have very little.

The camber change associated with caster is favorable, particularly for road racing cars, which usually cannot get favorable camber on both front wheels any other way. We can have too much of this good thing, but that's extremely uncommon.
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Old 06-28-05, 12:20 PM
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I have 6deg caster, 2.5front camber, 2 rear camber, the car seem to turn in too sluggish for autox turns. What's everyone running on their caster? On the other note, the car is pretty easy to catch once the rear gets sliding
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