: Alignment SPECs



Staxxin
06-10-06, 01:59 PM
No shops in my local area have the V on file i.e. NTB, Merchant's, Mr. Tire, etc. Are the below alignment specs from the FAQ correct? Also, I have FG2's - does that make a difference?

Thanks!!!

_______________________________

What are the alignment specs for the V?

FRONT

Camber: Range: -1.0 to 0.0 / Optimal: -0.5
Caster: Range: 4.6 to 5.6 / Optimal: 5.1
Cross Camber: Range: -0.5 to 0.5 / Optimal: 0.0
Cross Caster: Range: -0.5 to 0.5 / Optimal: 0.0
Sum Toe: Range: 0.0 to 0.4 / Optimal: 0.2
Toe: Range: 0.0 to 0.2 / Optimal: 0.1

REAR

Camber FE1: Range: -0.6 to -1.4 / Optimal: -1.0
Camber FE3: Range: -1.0 to -1.8 / Optimal: -1.4
Cross Camber: Range: -0.75 to 0.75 / Optimal: 0.0
Sum Toe: Range: 0.0 to 0.40 / Optimal: 0.2
Toe FE1: Range: -0.05 to 0.24 / Optimal: 0.12
Toe FE3: Range: 0.0 to 0.24 / Optimal: 0.12
Trust Angle: Range: -0.15 to 0.15 / Optimal: 0.0 Note no FE4 entries... but they shouldn't be *too* far from the above. Based on the above ranges, what works well on my Z06, and looking up what M5 guys are running, i cobbled together some recommendations (haven't tried these... just MHO):

Track Front:

-2.2 degrees negative Camber (if you can get that much)
As much Positive caster as you can get without sacrificing camber.
Neutral (0) Toe to 1/16" Toe OUT Each, 1/8" Total Max. [1/16" Toe out = -0.06 deg]

Track Rear:

-2.2 degrees Negative Camber (if you can get that much)
1/8" Toe IN Each, 1/4" Total Toe IN [1/8" Toe in = +0.12 deg]
Rear Toe should never be Toe out (negative)

Aggressive Street Front:

-1.0 degrees negative Camber
As much Positive caster as you can get without sacrificing camber.
Neutral (0) Toe to 1/32" Toe IN Each, 1/16" Total Max. [1/32" Toe in = +0.03 deg]

Aggressive Street Rear:

-1.5 degrees Negative Camber
1/8" Toe IN Each, 1/4" Total Toe IN [1/8" Toe in = +0.12 deg]
Rear Toe should never be Toe out (negative)

Lindsay Cadillac
06-10-06, 02:21 PM
Here are the most up to date values from the service manual... FG2's don't make a difference on the alignment settings...

FE2, FE3, FE4

Front Suspension
Camber -0.50°± 0.60°
Camber Cross Tolerance ± 0.60°
Caster 5.10 ° ± 0.60°
Caster Cross Tolerance ± 0.60°
Total Toe 0.20° ± 0.20°
Steering Wheel Angle 0° ± 3.50°
Thrust Angle --

Rear Suspension
Camber -1.50° ± 0.50°
Camber Cross Tolerance ± 0.75°
Caster 5.10 ° --
Caster Cross Tolerance --
Total Toe 0.20° ± 0.20°
Individual toe to be greater than or equal to -0.00°
Steering Wheel Angle --
Thrust Angle 0° ± 0.20°

Staxxin
06-10-06, 02:23 PM
Here are the most up to date values from the service manual... FG2's don't make a difference on the alignment settings...

FE2, FE3, FE4

Front Suspension
Camber -0.50 0.60
Camber Cross Tolerance 0.60
Caster 5.10 0.60
Caster Cross Tolerance 0.60
Total Toe 0.20 0.20
Steering Wheel Angle 0 3.50
Thrust Angle --

Rear Suspension
Camber -1.50 0.50
Camber Cross Tolerance 0.75
Caster 5.10 --
Caster Cross Tolerance --
Total Toe 0.20 0.20
Individual toe to be greater than or equal to -0.00
Steering Wheel Angle --
Thrust Angle 0 0.20

Thanks James!!! I should have just called you :-) or brought the car out.

If I provide the above specs to NTB or Merchants should they be able to perform the alignment?

Thanks again!!!!

ajedwardsjr
06-10-06, 06:20 PM
NOTE TO STAXXIN:
Make sure your shop knows how to do a wheel alignment without damaging your rims. They have to have the right equipment, they have to be very careful, and the have to realize how pissed off you are going to be if you pick your car up with rim damage. Take some pictures first. Walk around with the manager. Show him how beautiful your rims are. Show him the pictures. Introduce him to your friend, Bruno.

JOEYCTS-V
06-10-06, 06:39 PM
After just installing my Falken Azenis RT-615's I had steering wheel shake at around 60mph. I just had an alignment done at my dealer yesterday and it's gone. :thumbsup: If you can't find someone local I would take it to the dealer. You may pay a little more but hopefully it will be done right.

Lindsay Cadillac
06-10-06, 08:42 PM
Thanks James!!! I should have just called you :-) or brought the car out.

If I provide the above specs to NTB or Merchants should they be able to perform the alignment?

Thanks again!!!!You're right you should have just brought it by...

Anyone that can do an alignment should be able to align it to the specs I gave you...

ctsvett
06-11-06, 03:05 AM
I will update the FAQ>. thanks james!

Reed

wildwhl
06-11-06, 03:15 AM
FWIW -

I didn't read through the above, but am running an "aggressive street" suggestion from the .faq...it is a touch too aggressive.

WW

Dreamin
06-11-06, 11:16 PM
What's too aggressive about it WW?

wildwhl
06-11-06, 11:59 PM
Dreamin -

What I find is that under hard accel at higher speeds (say a passing run in 4th from 60 mph - 90 mph or so) the V begins to really follow road imperfections. Just imagine, hammer down pull out left - catch a groove and go farther than planned - look like an idiot on the road. Didn't do this until it was aligned (could also be a bad alignment job).

WW

Dreamin
06-12-06, 12:03 AM
Sounds like a bad alignment... one of the toe specs is out of whack... exactly the symptom you're describing.

Got the 'before' and 'after' alignment spec print-out??

The only issue with the 'aggressive street' or 'track' alignment should be wearing out the inside edge of the tire to fast (from the negative camber).

wildwhl
06-12-06, 12:07 AM
I do...it all looks like it should.

There is more to this story though and I shouldn't be suspicious of the alignment specs now that I think about it...there was that trailing arm bolt that was about to fall out.

WW