Just got aligned, still have pull to right. Was told it's a tire? - Chevy Impala SS Forum
 
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post #1 of 7 (permalink) Old 07-21-2004, 02:18 PM
tlynch
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So,
I've had a pull to the right (enough that I have to hold the steering wheel about 10degrees left to go straight on flat ground). If I'm in the left lane on the freeway going 70ish, I don't have to touch the wheel (I'm guessing due to the road crowning).

I figured since it's been a while I needed an alignment.

Here's what the specs showed. How do they look?

Front Left Front Right
Before Actual Before Actual
-0.1 -0.5 camber -1.0 -0.5
3.5 3.2 caster 3.8 3.7
-0.28 -0.08 toe -0.13 0.08
10.3 11.2 SAI 11.4 10.6
10.2 10.6 Inc Angle 10.4 10.1
----------Turning angle diff -------


Front Before Actual
Cross Camber 0.9 0.0
Cross Caster -0.4 -0.5
Total Toe -0.41 0.15
Set Back -0.06 -0.19

Rear Left Rear Right
Before Actual Before Actual
-0.4 -0.4 Camber -0.5 -0.5
-0.14 -0.11 Toe 0.03 -0.02


Rear Before Actual
Total Toe -0.15 -0.09
Thrust Angle -0.07 -0.06

So, I have a few questions.

1. If the rear isn't adjustable (even with metcos) why did the numbers change?

1a. Is it normal for the rear left and right to vary on the toe? Is that a sign of a problem? I would think since it's a solid axle those should be the same.

2. What's SAI?

3. Is it possible that I have a tire causing my pull? Keep in mind I've rotated them 3 times over the past 7 months and it doesn't seem to matter where the tires are the car always pulls the same way.
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post #2 of 7 (permalink) Old 07-21-2004, 03:16 PM
Erik
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I can't tell you anything about the specs, but I can tell you it's possible to have a tire cause the car to pull. It happened to me with a KDWS. That having been said, the way I finally found it (after two alignments) was I swapped the front tires around and the pull followed the tire. (Man was I pissed that two shops didn't catch that for me.) The way I dealt with it was to move the bad tire to the rear. If you've moved your tires around and it hasn't changed the way the car pulls, that would seem to rule out the tires.
post #3 of 7 (permalink) Old 07-21-2004, 06:29 PM
Roadmonster96
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SAI is Steering axis Inclination. It's a nonadjustable setup in your steering knuckle that causes your tires to "lean" when turned
 
post #4 of 7 (permalink) Old 07-21-2004, 08:21 PM
tlynch
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So I wonder why all these "non-adjustable" settings have their specs changed?
post #5 of 7 (permalink) Old 07-22-2004, 07:48 AM
kevm14
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Go back and have them add more caster to the right side. Raise it by 0.5 to 1 degree. I also think the caster on the left is too low, but I'm a big fan of lots of caster anyway. The camber looks good for a street car, if even a little high. Depending on how you use the car, I might even have it dialed down to -0.25* on both sides, or maybe just the left (to help with the pull).

Question about the pull. When you let go of the wheel on a flat road, the car drifts to the right, correct? What is the angle of the steering wheel at this time? Is it centered or not?
post #6 of 7 (permalink) Old 07-22-2004, 06:22 PM
tlynch
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On a flat road, when I let go of the wheel it goes to true center (top of airbag cover is level). Like that the car will change lanes in about 2 seconds tops.

I really have to wonder if my rear-end is out of alignment. But I thought that an alignment would compensate for that?

If the problem is with the front, it's such a "minor" one that with the front jacked up and the wheel straight, the tires look perfect to my eyes.
post #7 of 7 (permalink) Old 07-23-2004, 07:46 AM
kevm14
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Follow my suggestions in my previous post on caster and camber.
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