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That's if that shop was able to retain the old machine. The dealer where I work added a second machine when BMW mandated the newer one for any warranty alignment claims, but my guess is that most dealers just replaced the old with the new.
And ard, the 6 minutes of toe on each side is good, I personally like less toe in on with bigger rims/wider tires and a little more on small/narrow wheels... depends on how the vehicle is set up. |
...and they do have to adjust the toe to get you're steering wheel straight even if they are going to keep the same settings. Basically, they have to turn the tie rod adjustment the same direction on both sides to keep the same toe while adjusting the steering wheel.
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boyce8976: I hope you don't see this as a threadjack but I'm posting my align sheet as well, and hopefully it will add to the information and discussion.
Weasel, et al: do you see where these numbers are acceptable? I recall ard's mentioning in another thread that BMW toe numbers are very lax and for best performance should be far lower in tolerance (am paraphrasing). When (if) I take the car back to them and if they say they did the numbers again and they're good, what's a good answer for getting them to fix the steering angle? Which of the numbers on my sheet should I be speaking to? Edit: Sorry for the messy attachment. Guess it lay around on my desk too long! |
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BTW the handwritten stuff is mine... as I was trying to make sense of the numbers; this is new stuff for me and I will admit I have only a basic understanding here. Enlightenment would be welcome. :thumbup: |
kck7, I can use your sheet as an example of why I don't care for the new machine... You can clearly see how 5mm difference in measured ride height makes a huge difference in where it tells the tech to adjust to. Just look at the "target data" for camber and toe! It wants one side camber at - and one at +..... I just don't like it. And from the fact that it gets the ride height numbers from stick on sensors that can be accidentally stuck at different positions/angles I don't see it as the most accurate system.
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This seems like a crazy way to align a vehicle... I don't see ride height affecting a tire's contact patch, or suspension geometry for that matter, as much as load... this makes no sense to me... each wheel's suspension geometry should be set the same as it's counterpart's (FR vs. FL and RR vs. RL) in order to achieve neutral handling. |
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PS: with the double A arm front suspension, their should be less affect on camber, etc with extra weight but its still there. |
With unequal length suspension component the geometry does change with the ride height... which is why BMW did this. However I personally like setting the alignment specs equal with where the vehicle sits naturally, rather than unnecessary compensate for deviation from nominal ride height.
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