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Author Topic:   caster & caster gain?
Braided Dirt
Member
posted September 21, 2001 11:07 PM
Recently I have heard a lot about setting caster at extremly high degrees such as 10-13. I've also had it explained to me that caster gain will effect the loading of the left rear tire off when countersteering. Is this better applicatably to high banked, semi-banked, etc, or does it matter? What is the best way to trace the effects of caster gain? How much would it acually gain and is there any accurate way of telling? Can anybody tell me the ways of detecting visually, if a car has higher caster? Would increased caster have any effects on the straightways? I'm interested to hear about anything you could tell me on this.


jammin
Administrator
posted September 21, 2001 11:51 PM
This is what turnplates are made for. Checking at specific degree readings will tell you exactly where your at as far as static weight at this point. With caster settings, you can place weight on the car wherever you want it during the turning point of the car. This is all in preference. The higher the caster split, the more weight transfer the car has when the wheels are turned.

jammin


Braided Dirt
Member
posted September 22, 2001 09:52 AM
Where will the weight transfer? the LR? how do I tell how much weight is transfered? I've heard of a few things to do to check this but what is used more often?


CHAMP00
Member
posted September 22, 2001 10:38 AM
A GOOD chassis should not have any caster gain or as litte as poss. take you spring and shock out check caster then go up 1 inch check agian do it for 4 to 5 inch of movement and see how much it gains. CHAMP


CUSTOMPERFORMANCE
Member
posted September 22, 2001 11:28 AM
champ is correct. what you guys mean is setting the right front with considerable more caster than lf, like 8+ rf and 3lf+
the more the rf has than left, hence split can have an effect on the car by loading the lr when counter steering to the right coming off the corner. like champ said you dont want any gain thru travel because it would make for a erratic car because the caster could change different settings based on how much the suspension travels.


CUSTOMPERFORMANCE
Member
posted September 22, 2001 11:31 AM
when you have a high caster split do this:
turn your wheels left and right. when the rf has more caster than lf, it will raise higher turning to the right, than the left wheel turning to the left.


Braided Dirt
Member
posted September 22, 2001 02:26 PM
So if you've had a problem with it not tranfering weight onto the right front, a higher caster split is not the way to go, or is this wrong?
Will turning the steering wheel right then weighing the car give me an accurate picture of the amount of LR I'm going to be gaining?
Is this becoming more of a common practice? or is the normal caster settings still the way to go. I'm looking at changing it, but I want to know everything I can before I make the change.

On another subject... how often should we be checking the front roll center? we haven't checked it since....well.. I dont' know when I think we might have checked it at the begining of the year, but we've bent the frame since then.


CUSTOMPERFORMANCE
Member
posted September 22, 2001 02:36 PM
more caster split also helps the car turn left. yes i would scale the car normally with the wheels straight and then turn them to the right to see how much lr you gain. yes this is also something more people in my area are expermenting with. too much split can make it difficult to get the wheels turned back coming off. its just something you may want to try and go up gradually.


racerraw
Member
posted September 23, 2001 09:40 PM
Thank you all for the information. It was needed and is going to be put to use. If anyone has anything else that might be helpful on this subject please pass it along, I don't mind hearing more.


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