Wheels sits askew, normal or not?

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Yeddheng
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Wheels sits askew, normal or not?

Post by Yeddheng » Fri Jul 31, 2020 9:52 pm

:driving:
I’ve just installed a set of KW V3 and GC camber plates.
4-wheel alignment was done with moderate settings (front camber -2,1, total toe 0,10) and everything looks good.
I’m very happy with the result but there is one oddity I have to check with you guys. The front wheels look like they are positioned unevenly, and when measuring you see that the right wheel sits about 7 mm more inwards than the left at the spindle. My front wheels, Arc-8, have the same ET (38).

Have you guys seen this on your Z4M:s, ie this is normal?
If not, is there some way to adjust it?

(I’ve had the car since 2008 and it has never been in an accident.)
Z4 MC 07 / A08 Silver grey / Black interior w Carbon leather / VT+RE mounts / 10.9 / cdv- / RPi / Cup2 / Arc-8 / Lugs / KW V3 / GC camber plates / Vorshlag RTAB limiters / Custom alignment / Aux / Stubby / Mud flaps /

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Wheels sits askew, normal or not?

Post by BMWZ4MC » Sat Aug 01, 2020 8:18 am

:worthless:
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synthedup
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Wheels sits askew, normal or not?

Post by synthedup » Sat Aug 01, 2020 8:30 am

You can’t change the camber on these cars so the only thing that I can think of it that the rear control arm Bush is either not seated properly (pushes all the way in) or it is knackered.

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Wheels sits askew, normal or not?

Post by MrPT » Sat Aug 01, 2020 9:19 am

What’s your reference point for the measurements?
2008 Z4MC: SG/Imola | sub-flimper spec | +OEM CSLs | +KWv3 | +TMS RTABLs | +VT mounts | +Eventuri | +OEM strut brace | +DB9 front BBK | +cruise - probably looks a bit like your one
2006 Z4 2.5si: gone

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Wheels sits askew, normal or not?

Post by BMWZ4MC » Sat Aug 01, 2020 9:47 am

synthedup wrote:
Sat Aug 01, 2020 8:30 am
You can’t change the camber on these cars so the only thing that I can think of it that the rear control arm Bush is either not seated properly (pushes all the way in) or it is knackered.
He’s concerned about the front wheels
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Z4MC - heavily fettled for track use, now in Sydney; Modified RS4 Avant - back in Blighty;
Westfield SEiW track car currently in hibernation; S2000 GT - sold

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Wheels sits askew, normal or not?

Post by synthedup » Sat Aug 01, 2020 9:56 am

BMWZ4MC wrote:
Sat Aug 01, 2020 9:47 am
synthedup wrote:
Sat Aug 01, 2020 8:30 am
You can’t change the camber on these cars so the only thing that I can think of it that the rear control arm Bush is either not seated properly (pushes all the way in) or it is knackered.
He’s concerned about the front wheels
Sorry, I may not had been cleaned. I was referring to the large lollipop bush that’s sits at the rear of the control arm/wishbone

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Wheels sits askew, normal or not?

Post by BMWZ4MC » Sat Aug 01, 2020 10:29 am

Ah, ok. The OP has camber plates so can adjust the camber, but it could be the bush too.

My KW camber plates are set to different positions by about one graduation (on the scale etched onto their top surfaces) when comparing left with right, but the actual measured camber is the same side to side.
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Z4MC - heavily fettled for track use, now in Sydney; Modified RS4 Avant - back in Blighty;
Westfield SEiW track car currently in hibernation; S2000 GT - sold

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Wheels sits askew, normal or not?

Post by Yeddheng » Sat Aug 01, 2020 2:38 pm

BMWZ4MC wrote:
Sat Aug 01, 2020 8:18 am
:worthless:
Here ya go! :D
First a picture for comparison left and right:
Image

...and some details...
Image
Image

synthedup wrote:
Sat Aug 01, 2020 9:56 am
BMWZ4MC wrote:
Sat Aug 01, 2020 9:47 am


He’s concerned about the front wheels
Sorry, I may not had been cleaned. I was referring to the large lollipop bush that’s sits at the rear of the control arm/wishbone
Yes, that is possible if the lollipop is totally shot. The pivot angle could make the spindle at the other end move in or out. Whe inspected all the bushes including this and they all looked fine. But you never know.
But would'nt you feel it when driving, or even when pulling the wheel with your hand? And can you really make an alignment if that bushing is so bad?



MrPT wrote:
Sat Aug 01, 2020 9:19 am
What’s your reference point for the measurements?
We meassured the difference between the same point at the strut to the brake disc.
Its also visible when looking at it, se picture above.
Maybe its the more aggressive camber that make it visible? I have not noticed it before



BMWZ4MC wrote:
Sat Aug 01, 2020 10:29 am
Ah, ok. The OP has camber plates so can adjust the camber, but it could be the bush too.

My KW camber plates are set to different positions by about one graduation (on the scale etched onto their top surfaces) when comparing left with right, but the actual measured camber is the same side to side.
Aha, my GC-plates looks exactly like this to, and the camber is the same! I belive we are on to something here. If both camber plates is installed at the exact same place in the strut tower then there must be some difference below at the spindle. To make up for that difference you have to set the camber plates at different positions.
Maybe our cars are built like this? My mechanic could name some car models that are very different from side to side and are built that way.
Z4 MC 07 / A08 Silver grey / Black interior w Carbon leather / VT+RE mounts / 10.9 / cdv- / RPi / Cup2 / Arc-8 / Lugs / KW V3 / GC camber plates / Vorshlag RTAB limiters / Custom alignment / Aux / Stubby / Mud flaps /

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Wheels sits askew, normal or not?

Post by RedUn » Sat Aug 01, 2020 8:29 pm

Get someone to sit in the drivers seat and have a look, if it's been corner weighted they don't sit right without the weight in there :thumbsup:
IMOLA Z4///MR

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Wheels sits askew, normal or not?

Post by Yeddheng » Sat Aug 01, 2020 8:56 pm

RedUn wrote:
Sat Aug 01, 2020 8:29 pm
Get someone to sit in the drivers seat and have a look, if it's been corner weighted they don't sit right without the weight in there :thumbsup:
Ok, thanks, I’ll try that. It is corner weighted but it was already perfect so we did’nt have to change anything.
Z4 MC 07 / A08 Silver grey / Black interior w Carbon leather / VT+RE mounts / 10.9 / cdv- / RPi / Cup2 / Arc-8 / Lugs / KW V3 / GC camber plates / Vorshlag RTAB limiters / Custom alignment / Aux / Stubby / Mud flaps /

My Z4MC

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Wheels sits askew, normal or not?

Post by Yeddheng » Sun Aug 02, 2020 10:29 am

I just want to add that this kit from KW is fantastic!
Wonky wheels or not, I could not hope for better handling and the rear is perfectly tamed and under control.
As they say, - totally epic! :thumbsup:
Z4 MC 07 / A08 Silver grey / Black interior w Carbon leather / VT+RE mounts / 10.9 / cdv- / RPi / Cup2 / Arc-8 / Lugs / KW V3 / GC camber plates / Vorshlag RTAB limiters / Custom alignment / Aux / Stubby / Mud flaps /

My Z4MC

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Wheels sits askew, normal or not?

Post by beanie » Sun Aug 02, 2020 12:11 pm

Wheel position aside, the underside looks very tidy. :thumbsup:
Image
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Wheels sits askew, normal or not?

Post by Yeddheng » Sun Aug 02, 2020 4:59 pm

Thanks man! :)

Maybe we should have a poll on how much difference in offset our wheels really have? :fuelfire:
Z4 MC 07 / A08 Silver grey / Black interior w Carbon leather / VT+RE mounts / 10.9 / cdv- / RPi / Cup2 / Arc-8 / Lugs / KW V3 / GC camber plates / Vorshlag RTAB limiters / Custom alignment / Aux / Stubby / Mud flaps /

My Z4MC

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Wheels sits askew, normal or not?

Post by RedUn » Sun Aug 02, 2020 11:40 pm

Mine are pretty even, I can tell as it's worn through the arch liners a similar amount each side! :evil: :rofl:
IMOLA Z4///MR

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