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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Oct-19-2012, 02:32:00 AM   #1
vongeiss
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Default Alignment with lowering kit? Check out this alignment read out.

Hey guys, first I'd like to start by saying I'm in auto tech classes right now, specifically a steering, suspension, and alignment one right now. The other night I was fooling around with the alignment machine (state of the art Hunter machine) getting to know it a little bit better. I wasn't going to do an alignment, although in retro spec I should have started fiddling around a little, it looks a lot easier than I thought (I watched those nifty little videos on the hunter program that show you exactly how to adjust everything).

Anyway, I knew my car was going to be out of alignment, as the camber is bad in the rear and eating up tires. Well I was surprised to see how bad it actually was because it still drives dead straight. Here's a pic of my car's aligment specs:



Pretty bad huh?

Now my car is lowered on Tein S tech springs, and Koni shock absorbers. This will obviously affect camber and everything else, but do you guys think I still have enough adjustment in the rear cam bolts, and top of the strut mounts to get this thing back into spec? I'm not so worried about the toe, more so how far off the camber was.

Side note, I need a rear control arm, and most likely RTABs as well, even though they look ok, I feel a little squirmy in the rear under heavy accel.

Pic for the hell of it

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Old Fri, Oct-19-2012, 03:16:56 AM   #2
StevoTheHobo
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Default Re: Alignment with lowering kit? Check out this alignment read out.

The toe numbers are the ones that stick out to me. It seems like your left side of the car has toe out, while the right side is toe in. I think that might be the big factor in your tire wear. Your front right camber is also way higher than the front left, but that just means the inside of your front right tire's going to wear out faster than your front left.
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Old Fri, Oct-19-2012, 04:02:45 AM   #3
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Default Re: Alignment with lowering kit? Check out this alignment read out.

Your camber is great, although you'll want to even out the front. It's your toe/thrust angle that are jacked.
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Old Fri, Oct-19-2012, 07:01:09 AM   #4
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Default Re: Alignment with lowering kit? Check out this alignment read out.

As others mentionned, camber looks good. Toe is what causing the wear and abnormal wear. You could have 5 degres of negative camber and the car would still drive straigth...
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Old Fri, Oct-19-2012, 07:52:56 AM   #5
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Default Re: Alignment with lowering kit? Check out this alignment read out.

sorry but WHAT? your camber looks fine? im surprised that thing drives straight. Yes the the rear toe is what is going to be chewing your tires off. But you have almost a full degree difference in camber from left to right. caster is bang on (judging my the green as i do not know what the specs are off the top of my head)

I would bring your front right camber up to at least -1.9, -1.8. that almost full degree difference is a little high if u ask me. since ur caster is the same that wont pull but u have a full degree higher on the left.

bring the front right camber more positive slightly...till ur roughly a .4-.5 difference left and right... set your toe and collect the dough
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Old Fri, Oct-19-2012, 01:37:08 PM   #6
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Default Re: Alignment with lowering kit? Check out this alignment read out.

looks like the last person that did the alignment got lazy when trying to get to zero total toe by only adjusting one side.

that is a lot of castor too, but i think the geometry of the front suspension on these cars warrants it.

on my street driven M i had them dial out as much camber as possible and zero out toe to help slow tire wear.
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Old Fri, Oct-19-2012, 02:35:07 PM   #7
vongeiss
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Default Re: Alignment with lowering kit? Check out this alignment read out.

The spec on the camber is -1 degree. So I'm over it by a whole degree. This is why i'm worried about it. It will chew threw the inside of tires like no other, you should have seen the tires I took off the back a month or two ago. The toe is easy enough to adjust, and yes, the rear is bugging me and I want that thrust angle perfect. I daily drive this car so I don't want -2 degrees camber.
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Old Fri, Oct-19-2012, 02:48:07 PM   #8
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Default Re: Alignment with lowering kit? Check out this alignment read out.

Quote:
Originally Posted by vongeiss View Post
The spec on the camber is -1 degree. So I'm over it by a whole degree. This is why i'm worried about it. It will chew threw the inside of tires like no other, you should have seen the tires I took off the back a month or two ago. The toe is easy enough to adjust, and yes, the rear is bugging me and I want that thrust angle perfect. I daily drive this car so I don't want -2 degrees camber.
2deg of negative camber will have a very minimal effect on wear and the handling benefits are huge. Bring that other side to 2.3 as well and rock it.

Last edited by VwAlex; Fri, Oct-19-2012 at 02:56:13 PM.
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Old Fri, Oct-19-2012, 03:51:04 PM   #9
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Default Re: Alignment with lowering kit? Check out this alignment read out.

i have 2deg neg on my lowered M3, which is as much as they could dial out, and don't have excessive wear on the inner half of the tire. i also DD mine.

the toe is your problem.
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Old Fri, Oct-19-2012, 06:17:54 PM   #10
vongeiss
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Default Re: Alignment with lowering kit? Check out this alignment read out.

Quote:
Originally Posted by VwAlex View Post
2deg of negative camber will have a very minimal effect on wear and the handling benefits are huge. Bring that other side to 2.3 as well and rock it.
Quote:
Originally Posted by KS Golfer View Post
i have 2deg neg on my lowered M3, which is as much as they could dial out, and don't have excessive wear on the inner half of the tire. i also DD mine.

the toe is your problem.
hahaha ok cool!

I must say it looks really good with the camber, like *almost* stanced out.
I'm going to post a pic of the last right rear tire I took off once I find it.

Will the thrust angle correct itself when I correct the toe?
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Discussing Alignment with lowering kit? Check out this alignment read out. in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)