Need Help With Alignment

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Apr 17, 2009 | 09:11 AM

TCKT B8

Thread Starter

Drifting

Joined: Jan 2007

Posts: 1,884

Likes: 174

From: Melbourne FL

St. Jude Donor '09 & '11

Need Help With Alignment

My base 05 C6 is sitting on the alignment rack as I write this. The original Goodyears wore though to the steel belts on the inside edge of the front wheels at 13000 miles and the front treadwear seemed excessive. Rear wheels looked good - probably another 10K miles left on them. Anyway, I've installed new Firestone RFs and the alignment machine basically shows the alignment is within specs. Can anyone provide me with the correct alignment specs for a base 05 C6? And yes I used the search option, but it didn't help a whole heckuva lot. Thanks in advance.

Last edited by TCKT B8; Apr 17, 2009 at 09:41 AM.

Apr 17, 2009 | 10:12 AM

RicK T

Team Owner

Joined: Sep 2005

Posts: 20,352

Likes: 568

From: Ventura County, Calif

Check out Modshack's recommendations here and see what you think. Please let me know, I have some more discussions that may help.

http://forums.corvetteforum.com/c6-c...tire-wear.html

Apr 17, 2009 | 10:12 AM

calemasters

Le Mans Master

Joined: Jan 2005

Posts: 5,611

Likes: 5

From: Thousand Oaks California

Here are the correct alignment specifications and torque values.

Last edited by calemasters; Apr 17, 2009 at 10:15 AM.

Apr 17, 2009 | 01:28 PM

TCKT B8

Thread Starter

Drifting

Joined: Jan 2007

Posts: 1,884

Likes: 174

From: Melbourne FL

St. Jude Donor '09 & '11

Quote:

Originally Posted by RicK T

Check out Modshack's recommendations here and see what you think. Please let me know, I have some more discussions that may help.

http://forums.corvetteforum.com/c6-c...tire-wear.html

Thanks much for the link. The posters were correct - the stock specs wore out the inside of the front tires at 13K miles. Since I don't track the car, I went to 0 on front camber per their discussions and I'll see how I like it. I definitely will pay closer attention to tire wear this time!

Apr 17, 2009 | 02:39 PM

HANNY

Safety Car

Joined: Sep 2008

Posts: 4,296

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From: Location: Location: kAnSaS

if the insides are worn its either toed out too much or the camber is too negative. look at those 2 things as your issue and address it. good luck paul

Apr 17, 2009 | 02:56 PM

gatorp

Advanced

Joined: Dec 2006

Posts: 89

Likes: 0

From: easton pa

Quote:

Originally Posted by TCKT B8

Hi,I just replaced my GY tires with the Firestne wide oval run flats. I also had excessive inside tire wear on the old tires. I had noticed "feathering" on the inside edges with only 3k on the car and took to the dealer and they checked and said its "within specs"...ha. This time I found a great guy who has done allignments since the 70`s. he said factory range specs are just that ,a range. He then dialed in a four wheel allignment spot on. He used a computerized Hunter brand allignment rack. I drove the car when he was done and I was amazed!!! First I notice how quiet the Firestones are,and my car was rid of the side to side twitchiness one encounters on rutted highways The car now feels more "centered" with a heavier center feel on the wheel which translates into much more confidence when traveling at speed and encountering a bad road. don`t know how much was the tires and how much was the allignment...but I am very happy!! It was a pleasure watching this mechanic do the work and I told him so. He took pride in his work which I don`t see with the typical dealer techs. You will like the Firestones I`m sure...have a good day. gator

Apr 17, 2009 | 05:40 PM

akriggm

Racer

Joined: Feb 2008

Posts: 368

Likes: 8

From: Clinton Township Michigan

gatorp,

Any chance you could post the "actual numbers" from your alignment (they should be on a printout from the Hunter machine)? I'd like to see how they compare to the OEM-suggested range......
Enjoy,
akriggm

Apr 17, 2009 | 08:57 PM

TCKT B8

Thread Starter

Drifting

Joined: Jan 2007

Posts: 1,884

Likes: 174

From: Melbourne FL

St. Jude Donor '09 & '11

Quote:

Originally Posted by akriggm

Good idea. here's the before and after alignment numbers (tires wore out on inside at 13K miles) red indicates out of spec numbers:

Front:
Camber left-.06 after: -.02 right -.07 After alignment: -.02
caster left 7.4 after 7.8 right 6.3 after:8.0
toe left 0.09 after 0.10 right 0.00 after: 0.09
cross camber 0.1 after: 0.0
cross caster 1.1 after:-0.2
cross sai 0.5 after:1.7
total toe 0.09 after: 0.19

Rear:
camber left -0.3 after: -0.3 right -0.5 after -0.5
toe left 0.08 after 0.00
toe right 0.20 after -0.01
cross camber 0.2 after 0.2
total toe 0.28 after -0.01
thrust angle -0.06 after 0.01

Last edited by TCKT B8; Apr 17, 2009 at 09:01 PM.

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Apr 17, 2009 | 10:39 PM

RLSebring

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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com

St. Jude Donor '17

I am glad I seen this. I had a four wheel alignment about 2 weeks ago and been mainly driving around town and it felt OK. I left at 4am this morning on a 10 hour Interstate trip and the car literally wore me out fighting it. I drifted side to side and and every little correction to stay straight resulting in over steer and required a correction. I am sure the drivers around me thought I was drunk or something. I got back from where I went and I am exhausted.

The numbers posted by TCKT are they pretty common settings? I have an 08 Vert and going to go back to the alignment shop tomorrow. The numbers may save me a lot of explaining my problem with he current number on the alignment.

Apr 17, 2009 | 10:54 PM

#10

RicK T

Team Owner

Joined: Sep 2005

Posts: 20,352

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From: Ventura County, Calif

Quote:

Originally Posted by RLSebring

Did you read the thread in the link I posted earlier? Has good discussion and info. Best of luck, sounds like you need change something.

Apr 17, 2009 | 10:57 PM

#11

RLSebring

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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com

St. Jude Donor '17

Quote:

Originally Posted by RicK T

Did you read the thread in the link I posted earlier? Has good discussion and info. Best of luck, sounds like you need change something.

I'll have to read it in the morning. I am dead beat, seriously. I normally don't get like this when I travel unless I'm doing a 16 - 18 hours. It about drove me crazy.

Apr 17, 2009 | 11:40 PM

#12

HANNY

Safety Car

Joined: Sep 2008

Posts: 4,296

Likes: 156

From: Location: Location: kAnSaS

Quote:

Originally Posted by TCKT B8

i did alignments for years so have a decent grasp on things. Going off your before readings i can tell you the tire wear was coming from the camber being at too far negative on the front. Even tho it was within specs a good alignment guy will read your old tires as much as the alignment readings themselves, within specs on your car just wont do. Looks like the addressed that issue and you should be good to go on the front. I would of set the RR camber lower but thats just me. For everyday driving the camber toward -.3 is better front and rear. glad you are all set, paul

Apr 18, 2009 | 07:04 AM

#13

davekp78

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From: merritt island fl

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Quote:

Originally Posted by TCKT B8

Did you add an extra zero to the front camber readings?
For example, shouldn't the "left front before " be .6, not .06?

Apr 18, 2009 | 09:30 AM

#14

AORoads

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From: Northern, VA

St. Jude Donor '15

"In honor of jpee"

Quote:

Originally Posted by RLSebring

I'll have to read it in the morning. I am dead beat, seriously. I normally don't get like this when I travel unless I'm doing a 16 - 18 hours. It about drove me crazy.

I haven't re-read the thread, but note the settings in this thread are for an '05. They may be the same for your '08, but don't assume it is.

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