[skier_du]

Originally Posted by gippy

so what bushings do i need?
im' going to plunge into ISTA to understanding how many and where located.

EDIT: useful diagram below from powerflex. Looks like the ones i should change when replacing the sway bars (that make sense to change at the same time, excluding the sway bar ones as they come with the kit), are just 19 + 20 = the rear subframe front + rear bushes.

The rest i can do on my own if i feel the need to, without having to do anything complicated like lowering subframes. Right?

browsing around the forums, looks like i should look into
- rear subframe bushings - Solid delrin https://www.bimmerworld.com/Suspensi...shing-Set.html

or https://www.turnermotorsport.com/p-3...ame-mount-kit/

https://www.akgmotorsport.com/produc...-f22-2-series/ alternative?

A number of forum posts i've come across suggest that these bushes are not suitable for street, because of the additional bumps etc.. not found on a track. And therefore could deform and give me a headache.
I need to find out if these rear subframe bushings will be useable for daily road use and not cause damage....... the car will be doing anywhere up to 10000 miles annually.

- rear differential bushing (going to ignore for now)
- front control arm bushings. (VAC monoball)

furthmore, reading around, it sounds like Monoball might be my best bet due to excess wear reported on control arm poly bushes? according to a post by Watsey

[IMG]https://www.powerflex.co.uk/resize_i....jpg&w=600[/IMG]

You're on the right path for the bushings. I did a bunch or research, like you're doing. But ultimately I decided on doing the full arm replacements in the rear with solid ball joints. But since my car isn't a race car, I made sure they're sealed. There's not a ton of options a at the moment for non-M cars, but there's a few. I think I have about 2 bushings left in the rear. But since the rear is very stable and predictable at this point, I'm not in a rush. I've you've checked out the VAC Monoballs thread, then you know my experience with poly in the front. And I'm not the only one who had them not hold up.
Regarding the rear subframe, I don't have experience with the different solid mounts yet so I can't really give a lot of advice there. But I'm happy with the inserts for the time, so I'll just wait until my car doesn't see daily duty before swapping. The rear diff bushings are connected to the drive train. In my experience this will bring a lot of gear whine when installed. Since there's little benefit other than slightly better throttle response for me at this point, it really isn't necessary. That may change for you with rwd and when you install an lsd. But holding off to focus on the rest of the suspension is a good idea for now in my opinion.

Originally Posted by blumagic

what didn't you like about the B8's?

They feel stiff AF on sharp bumps for daily driving, but other than that they are pretty smooth and keep the car flat like you mentioned. I don't even feel like i really would want/need sways. my tire is a couple millimeters from front my fender and its so stiff it doesn't even rub the liner.

That's exactly why I didn't like them. Harsh over small bumps, then too soft over large. When I hit a large bump they'd just blow through and bottom out. The car never felt very stable. And they were pretty much shot within 2 years. farKLe! Had a good post a while back where he had shock synod of B6's. There may be a little difference but most likely they're pretty much the same.

Bilstein B6 Shock Dynos https://f30.bimmerpost.com/forums/sh....php?t=1595506