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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Alignment Specs - What should I aim for?



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      02-28-2013, 12:31 AM   #1
WesleyC
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Alignment Specs - What should I aim for?

Hi all,

I will be installing some Dinan camber plates this weekend and, of course, will need an alignment. I have Koni Yellows and H&R Sport springs. Besides that, there are no other modifications to my suspension. I also plan to knock out the alignment pins.

I am hoping to get -1.5 degree of camber up front with the camber plates. I am aiming for 0 toe and the rest to factory spec. Does that sound about right? If I can increase the camber even more, should I? I don't think I can get to -2 degrees, but maybe -1.75 degrees. I do a lot of spirited driving so I want the alignment to reflect that.

Thoughts? Suggestions?

Thanks,
Wes
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      02-28-2013, 02:14 AM   #2
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I suggest a slight 0.5 degrees toe out to improve front end responsiveness. That won't have negative side effects on straight line stability.
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      02-28-2013, 09:04 AM   #3
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I'm a fan of zero toe, it works well for the tracks I run. It gives good straight line stability and good turn-in performance. Toe out would give you a little more turn-in responsiveness but I haven't tried it. Toe in would give you better straight line stability at the expense of turn-in responsiveness. IMO there's not much of a difference as long as you keep toe to a minimum. Go with the standard BMW alignment spec for front toe if you're undecided (I believe it's slight toe in).

Personally I run -2* deg camber in front, it's as far as you can realistically go without exposing the tires to excessive wear. I had -1.5* for a while and it worked well too. I'm inclined to recommend -1.5*. You'll love what extra camber does for your handling.
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      02-28-2013, 11:58 AM   #4
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Awesome, thanks for the insight, guys! It is my understanding that 0 degrees of toe is best for tire wear since the tires aren't being "dragged". Is that right?

Would the same amount of toe in and toe out (e.g., 0.5 degrees toe in vs. 0.5 degrees toe out) have the same effect on tire wear?
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      02-28-2013, 02:39 PM   #5
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The wear for toe in vs out could technically be different depending on the tread pattern, but probably not to a material degree.

Excess toe is for sure detrimental to tire wear. The toe specified by the standard BMW alignment spec is pretty safe in that respect (I classify 'excess' toe as being more than the standard BMW spec).
Your rear axle will have some toe in, which is good and how it should be. Up front it's your preference. My suggestion, go with zero and if you don't think the car is quick enough on turn in, go for a little toe out. It will be a very minor difference.
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      02-28-2013, 06:40 PM   #6
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Cool. Thanks for all of the info, CJ!
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      03-08-2013, 01:59 PM   #7
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In case anybody is interested (for future reference), the alignment guy told me that the range of camber adjustment was -2.3 degrees to -1.7 degrees. I went with -1.7 degrees and I am happy with it.
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      03-08-2013, 02:22 PM   #8
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Thanks WC and CJ.
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