Chassis Reports

N

Nick7602

Member
 Redditch Worcestershire
Hi Guys

These are the chassis reports for my car, how do they stack up against your cars…..is the geometry out etc?


Thanks for reading my post guys


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Here are a few of mine as I tweaked it and got it re-done a few times..

Looks like you need new RTABs and maybe some of the front steering bushes have sagged a bit..its not badly out from what I can see..
 

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Why tyres so low at 33psi?
At that pressure i would be unable to turn steering wheel.

What is annoying is the rear toe, makes it a bugger to reverse.
 
flybobbie said:
Why tyres so low at 33psi?
At that pressure i would be unable to turn steering wheel.

What is annoying is the rear toe, makes it a bugger to reverse.
Click to expand...

That was the old tyre pressure, what is the correct pressure
 
mcbutler said:
where do you get this done fellas?
Click to expand...

It might be worth posting a question for 4-wheel alignment suggestions in your area.

After changing the ride height of my current E86, removing spacers and going back to 18" OE wheels from 19" after-market ones I had mine done by TWG Automotive in Camberley and the way it drives has been transformed!

Will, the principal, is ex-Sytner and probably invested in Laser alignment kit and a 4 wheel lift because he was racing in the BMW (E36) Compact Cup series, although he now races Legends on circuits.

While most Kwik-fit outlets have Hunter laser alignment kit, getting it right is probably more dependent upon interpreting the results than reading them!
 
Nick7602 said:
flybobbie said:
Why tyres so low at 33psi?
At that pressure i would be unable to turn steering wheel.

What is annoying is the rear toe, makes it a bugger to reverse.
Click to expand...

That was the old tyre pressure, what is the correct pressure
Click to expand...

Typical pressures are here..

https://www.wheel-size.com/size/bmw/z4/2010/

The primary reason for the high pressures is at a sustained 155mph you need a lot of pressure in the tyre to cope with the speed.

In the UK given peak and average speeds it arguable to go for lower pressures

People (generally) tend to settle in the 32-38 front and 34-40 rear with a 2 psi pressure differential..

That's a distillation of about 9,745 posts.. :tumbleweed: :rofl:

I'd suggest you start with 34/36 and try a bit up and down from there..IMHO
 
Hi Pete

The tyre pressures at the moment are 35 front 37 rears, which seems to be ok, new tyres. :thumbsup:
 
B21 said:
Here are a few of mine as I tweaked it and got it re-done a few times..

Looks like you need new RTABs and maybe some of the front steering bushes have sagged a bit..its not badly out from what I can see..
Click to expand...

I measured the front and rear wheels from the ground to the wheel arch lip, this is 66.5cm Rear, with 67.5cm at the front, purchased new springs yesterday so will now start to re fresh the whole lot including bushes, dampers and anti roll bars etc.
 
Nick7602 said:
Hi Pete

The tyre pressures at the moment are 35 front 37 rears, which seems to be ok, new tyres. :thumbsup:
Click to expand...

IMHO they should be in the ball park :thumbsup:
 
Nick7602 said:
B21 said:
Here are a few of mine as I tweaked it and got it re-done a few times..

Looks like you need new RTABs and maybe some of the front steering bushes have sagged a bit..its not badly out from what I can see..
Click to expand...

I measured the front and rear wheels from the ground to the wheel arch lip, this is 66.5cm Rear, with 67.5cm at the front, purchased new springs yesterday so will now start to re fresh the whole lot including bushes, dampers and anti roll bars etc.
Click to expand...

Sounds like a plan, are you going for the M3 steering arms and/or the uprated bearing on the top steering link?
 
https://www.turnermotorsport.com/p-339948-m3-front-upperlower-control-arm-upgrade-left-and-right-e82-e9x/?pdk=AwE

https://www.bimmerworld.com/BimmerWorld-Precision-Front-Upper-Control-Arm-Bearing-E90-E92-E93-M3-E82.html


These are packaged examples..the M3 stuff can be bought via autodoc cheaper,,the big monoball is a us buy I think

https://z4-forum.com/forum/viewtopic.php?p=1570762&hilit=m3+steering+arms#p1570762 refers :thumbsup:
 
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