autocross specs for suspension
Thread Starter
Instructor
Joined: Jun 2005
Posts: 156
Likes: 0
From: Liverpool NY
autocross specs for suspension
Autocross suspension setup.
A fellow club member told me that there was a site that offered different suspension setups for street/autocross/race etc. I've installed all new suspension in the car and would like to look at some specs for having this setup for autocross when I have the alignment done.
anyone have any thoughts on this?
A fellow club member told me that there was a site that offered different suspension setups for street/autocross/race etc. I've installed all new suspension in the car and would like to look at some specs for having this setup for autocross when I have the alignment done.
anyone have any thoughts on this?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Look at Vette Brakes & Products. They give base line settings.
I use "0" toe
.70 neg camber
3.94 castor (because that is about all stock fronts can hold)
rear .60 neg castor with VB&P smart struts and 420# spring with 3/4 poly sway
I use "0" toe
.70 neg camber
3.94 castor (because that is about all stock fronts can hold)
rear .60 neg castor with VB&P smart struts and 420# spring with 3/4 poly sway
Racer
Joined: Aug 2000
Posts: 434
Likes: 3
From: Cleveland Ohio
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Guldstrands specs for our c-3's are much less aggressive.
yes, I have driven over 100,000 street miles with my specs.
I also have replaced all the ball joints/poly a-arm bushings/ steering end links several times over the years. When people tell me that they use 2.0 degrees neg camber I would tend to believe that they have to because they have so much slop in 30 year old parts and rubber bushings.
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
toe out might be ok on the autocross track as the OP asked about but VB&P recommends toe out on a "track car", thanks but NO THANKS. I`ll stick to listening to the guy who knows what he knows because he "has been there and done that" opposed to the parts supplier who knows what they know because of guys like Guldstrand....
redvetracr
redvetracr
Last edited by redvetracr; Apr 16, 2008 at 11:21 AM.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
If you are going to do autocrossing with sticky tires like a Hoosier A06/R06 or Kuhmo V-710, You will need some decent amount of negative camber to make the tires work well (more than on a track duty Vette.) I run 2.2 degrees negative in the front, 1.25 negative in the rear, zero front toe, 1/4" toe in at the back and as muck positive caster as the upper control arms will allow after shimming for the negative camber (usually around 3 degrees positive caster.) To start out, I would run on some street tires until I learned to drive the Vette than go for a "killer alignment" and sticky tires in my second season of racing. You need to learn CAR CONTROL and then get the sticky tires. I would run 3/4-1 degree of negative on the front, 1/2-3/4 negative on the rear, 1/8 toe-in front, 1/4 toe in back and as much positive caster as you can get for the first season on street tires.
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Racer
Joined: Dec 2004
Posts: 410
Likes: 0
From: Wichita Kansas
If you are going to do autocrossing with sticky tires like a Hoosier A06/R06 or Kuhmo V-710, You will need some decent amount of negative camber to make the tires work well (more than on a track duty Vette.) I run 2.2 degrees negative in the front, 1.25 negative in the rear, zero front toe, 1/4" toe in at the back and as muck positive caster as the upper control arms will allow after shimming for the negative camber (usually around 3 degrees positive caster.) To start out, I would run on some street tires until I learned to drive the Vette than go for a "killer alignment" and sticky tires in my second season of racing. You need to learn CAR CONTROL and then get the sticky tires. I would run 3/4-1 degree of negative on the front, 1/2-3/4 negative on the rear, 1/8 toe-in front, 1/4 toe in back and as much positive caster as you can get for the first season on street tires.
