How much Castor to run
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
How much Castor to run
I am in the process of putting on the front monospring on my car. I have the lower arms on and the spring on. I should be getting the new VB tubular upper control arms on Monday. These are offset to allow more Castor. They are recomending 4 to 4 3/4 positive castor. Not worried about tire wear just handling. Is this the recomended setting? What kind of toe setting are you running. Looks like 1 to 2 degrees of negative camber is the recomended setting. 
Race Director
Joined: Nov 2000
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From: Waterloo ontario Canada
Why would Caster affect tire life?? I would run as much caster as possible. It in no way affects tire wear. Some newer corvettes I believe have 8 degrees or something like that.
Camber affects tire wear and NO way would I run 2 degrees. It makes the front end look like it is collapsing. The tires are visible leaning in.
I run amost nothing, I like my tires to sit flat on the road.
Toe I run 1/16 to 1/8th toe in
Camber affects tire wear and NO way would I run 2 degrees. It makes the front end look like it is collapsing. The tires are visible leaning in.
I run amost nothing, I like my tires to sit flat on the road.
Toe I run 1/16 to 1/8th toe in
Melting Slicks
Joined: Feb 2003
Posts: 3,053
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St. Jude Donor '03,'11
Necessary evil if you are serious about carving corners. The racers in my club run a bunch....just like you said, looks like the bushings are bad and the wheel is about to fall off.
There is discussion in the Autocross/Roadrace sect of bringing shims to the track and doing your own alignment to increase camber. You also have to adjust toe in as additional camber changes that.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
OK. I'll run as much caster as I can. I can see for the street you want almost nothing on the camber, for the track you would want some camber into it. Toe I agree should be at about 1/16 in seems to run the best. It will be interesting to see how mauch castor I can get from this setup.
Team Owner
Joined: Nov 2004
Posts: 20,715
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From: Sorrento Italy
i'll need soon to re-allign my car (after a few changes in the set up)..can somebody summarize what are best figures for road racing (with 15'' wheels, tubular a-arms, front monosprng, offset TA...)?
thanks
thanks
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
You may have seen this but these are all starting specs. Different track conditions will warrant different settings.
http://www.vbandp.com/instructions/h...ruct/align.htm
http://www.vbandp.com/instructions/h...ruct/align.htm
