Track alignment specs???
Thread Starter
Instructor
Joined: Feb 2008
Posts: 120
Likes: 0
From: montreal quebec
Track alignment specs???
I have a C6 - Z06 that sees a lot of track and so I just had a track alignment done. The specs came from "Pfadt's" website and call for 0 to -1/16th maximum toe (out) at the front, and -1/8th to -1/16th toe (out?) at the rear.
The alignment shop assumes that negative (-) means toe out on both ends, but I've never heard of toe out at the rear. Neither had they.
That's the way they aligned the car. Is this correct?
The rear oversteer is an adventure in most corners. Please help...
The alignment shop assumes that negative (-) means toe out on both ends, but I've never heard of toe out at the rear. Neither had they.
That's the way they aligned the car. Is this correct?
The rear oversteer is an adventure in most corners. Please help...
Team Owner
Joined: Sep 2005
Posts: 20,352
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From: Ventura County, Calif
Excerpted from aligncraft dot com:
Toe-in, or positive toe, is defined as the front of the tires being closer together than the rear of the tires. Toe-out, or negative toe, is when the rear of the tires are closer together than the front of the tires.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Good Track non street alignment
Front
Camber -2.0*
Caster, Max but equal
toe: 1/32" OUT to 1/16" OUT for tight courses 1/8" out is for Auto-X
Rear
Camber -1.0*
tow 1/32" IN to 1/16" for tight courses
Front
Camber -2.0*
Caster, Max but equal
toe: 1/32" OUT to 1/16" OUT for tight courses 1/8" out is for Auto-X
Rear
Camber -1.0*
tow 1/32" IN to 1/16" for tight courses
Thread Starter
Instructor
Joined: Feb 2008
Posts: 120
Likes: 0
From: montreal quebec
Thanx "Rick T", if negative (-) toe means that the rear of the tires are closer together, then the rears are toeing out* which is the oposite of what logic says should be correct, and "AU N EGL"s track alignment. Easy to see why the car is so loose at the tail, and the front turns in so well.
I think I'll give 'Pfadt" a call just to confirm everything. They're a great good source for parts and information.
I think I'll give 'Pfadt" a call just to confirm everything. They're a great good source for parts and information.
Race Director
Joined: Apr 2005
Posts: 10,436
Likes: 4
From: Everett Wa
This may very well be why my suspension guy was confused when I showed him the Pfadt sheet. Everything I have every read says that the C6 like a little toe in. When my tech saw it, he went toe out?
Anyway for dual purpose this is what I run:
Front
Camber -1.6*
Caster, Max but equal
toe: .09 (toe in)
Note: I can flip my upper pins and I get 2.4 for camber and toe that is slightly out.
Rear
Camber -1.0*
Toe: 0.0
As I don't have a trailer yet I have to make tire selction prior to going to the track and the drive can be 400 miles round trip plus track time. Mostly autocross with a couple of HPDE thrown in. Currently the tire of choice for this are my Firestone runflats, don't laugh we had a really wet event and I beat everyone by 3 seconds or my R888's.
Anyway for dual purpose this is what I run:
Front
Camber -1.6*
Caster, Max but equal
toe: .09 (toe in)
Note: I can flip my upper pins and I get 2.4 for camber and toe that is slightly out.
Rear
Camber -1.0*
Toe: 0.0
As I don't have a trailer yet I have to make tire selction prior to going to the track and the drive can be 400 miles round trip plus track time. Mostly autocross with a couple of HPDE thrown in. Currently the tire of choice for this are my Firestone runflats, don't laugh we had a really wet event and I beat everyone by 3 seconds or my R888's.
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Team Owner
Joined: Sep 2003
Posts: 43,084
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From: Raleigh / Rolesville NC
No. Not if the traction control is turned OFF.
The rear wheel only needs to be slightly taller then the front, not the 1 or 1.5 inchs ppl claim with TC/AH ON.
Know several guys with C6s that run 18x10 18x315/30 fronts and 18x11 18x315/30 rear with no problems. TC/AH is OFF
The rear wheel only needs to be slightly taller then the front, not the 1 or 1.5 inchs ppl claim with TC/AH ON.
Know several guys with C6s that run 18x10 18x315/30 fronts and 18x11 18x315/30 rear with no problems. TC/AH is OFF
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
Bill
