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Discussion Starter #1
If you are looking to improve the handling of a R 171 350 with sports suspension, theoretically, would you be better off getting the AMG suspension for the 350 [not the 55 AMG's] or eibach springs and Bilstein B8s or even stock springs with Bilstein B8s?

Assuming all other factors are equal, which would give better higher speed performance on the twisties?

Thanks
 

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Eibach springs and b8,s no question. Its what I run, well actually amg springs with B8,s but I have the Eibachs waiting to go on when I can be bothered. AMG dampers are nothing special especially the rears thats why they are on the shelf in my garage.
 

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Eibach springs and b8,s no question. Its what I run, well actually amg springs with B8,s but I have the Eibachs waiting to go on when I can be bothered. AMG dampers are nothing special especially the rears thats why they are on the shelf in my garage.

Legin - have you looked in any detail at the rear sway bar on the '55? I broke a link and was playing around when I was debating replacing it vs. having MB fix it. Not sure if there's much to be gained there with a heavier / tighter setup?
 

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Discussion Starter #6
Thanks Legin,

If you were to do one of them first, would you put the dampers first or the springs?

Thanks

R
 

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Why dont you get the shock absorbers from the SLK55 and get the eibach springs ?

I have that Eibach(Brabus) with the stock shock absorbers, its too comfortable for my liking but low for looks. My front tyre scrapes with the fender flares need to switch out to Coil-overs.
 

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Legin - have you looked in any detail at the rear sway bar on the '55? I broke a link and was playing around when I was debating replacing it vs. having MB fix it. Not sure if there's much to be gained there with a heavier / tighter setup?
The SLK is set up toward under steer; a heavier rear bar should get the car closer to neutral.
 

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Ram,
You need to go for the dampers first as thats where 90% of the benefit comes from. I dont agree with Alroumi about coil overs as I have fitted them many times and for a road car they are expensive requiring an expert to set up and give a poorer ride so for the track imo. I had Bilstein PSS9 on my 911 which I also raced but it was not great on the road. Oh and they need rebuilding quite often.
I have a set of AMG dampers in my garage your welcome to try, done 30k.

John, Regarding the question about sway bar., I have found that because the b8 is relatively much stiffer on the rear compared to the front (on a 55 at least) it has the effect of a stiffer rear sway bar making the car near neutral.
I wouldnt go for a stiffer rear bar even if available because it will pick up your rear wheel and then traction on turns will deteriorate, again I have done this in the past and have had bars made to my own spec but more isnt often better. Ironically I have today just finished fitting an RS4 rear bar to my a4 tdi avant but thats badly designed by Audi 16mm to 22mm !

My other observation is that the front rides higher on b8 vs amg with the same spring so either the platform is higher or its the gas pressure which I doubt, it is for this reason only I am going to fit eibachs to the front for starters
 

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Arno, Eibach make springs for the 200 and uprated for the 350 with the 350 spring being ok for 55 use. I dont have the part no. to hand but can get if you want but its the 350 application in the eibach catalogue
 

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Discussion Starter #15
This thing has been knocking around in my head and i am very grateful to Russj, Legin for answering my messages and to frogfoot for giving a different perspective. It was very helpful and i think i understand the issue a bit better thanks to all of you.

The sport suspension is lower by 10-11 mm in the front only compared to the standard 350. The springs are shorter at the front, has block spacers at the back springs and the dampers are different.

The Eibachs lower the whole car by 25 mm as per their literature. If you look at the Bilsteins - 25 mm lowering is suitable for B6s and B8s are recommended for lowering 30-40 mm or above. The B8s are B6s with a shortened stroke.

So In my mind, if i were to hypothetically put on B6s all around, i could decide on Eibachs later on with the same dampers. Correct? I think so as 25 mm will still be within the tolerances of B6.

I am slightly hesitant to lower, as i believe that ride height on Yorkshire roads is a bit of an issue already. So i am veering the direction of B6 dampers all around.

Now, Legin has noted above that the B8s with AMG springs, the front rides slightly higher than the back. Would that be the case with B6s and stock sport springs? That would be a pain - as i can live with the "arse in the air" but not the "boat" look.

Suggestions, opinions, criticisms please? :)
 

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where did you get your hands on a set of eibach springs? I just bought my 55 but the last owner has a set of H&R on, which i find way too stiff and want to change to eibach.
 
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