New Suspension, KW-V3?

[Copperman05]

True but Andy at promax has asked me to think about ride height, I was just wondering what others had found re-speed bumps, ride, etc.

Edd

 

[zcacogp]

This is bad:

This is also bad:

My Top Tip of the day is to go for something in between the two.

[]


Oli.

 

[Suffolk944]

ORIGINAL: Copperman05

True but Andy at promax has asked me to think about ride height, I was just wondering what others had found re-speed bumps, ride, etc.

Edd

IIRC mine was set at medium and have never had cause to want to change it from that. It is lowered and I can't remember any specific problems with speed humps other than a need to approach them very cautiously ! Parking head on against a kerb is probably more of a pain than speed bumps tbh with the lower ride height.

 

[Copperman05]

Thanks Jon, got any pictures of yours please?

Edd

 

[Jonny944CS]

Speaking of top mounts, but somewhat randomly: do M030 strut mounts and normal strut mounts differ dimensionally? Im trying to establish whether super-expensive M030 parts can be replaced with aftermarket adjustable types.

ORIGINAL: sulzeruk

I think they are dimensionally the same Simon. All top mounts I have seen have looked the same, could be just a higher shore value rubber again.
The Bilsteins use the standard top mount, they have a progressive spring fitted as well. Will get some pictures today and post up. Very nice looking pieces of kit.
Alasdair

Agreed on the dimensions compared with other '87-on mounts. For completeness; compared with '82->'86 mounts they fit to the body but have a 4° slant to suit the later, wider wishbones - so a no no for early cars.

The only identifying feature (other than the stiffer rubber) seems to be a green paint splodge...

I have a pair of M030 top mounts with k#ackered bearings and wish I could think of a good way of reconditioning them....

 

[Jonny944CS]

quote:

ORIGINAL: Copperman05

True but Andy at promax has asked me to think about ride height, I was just wondering what others had found re-speed bumps, ride, etc.

Edd

IIRC mine was set at medium and have never had cause to want to change it from that. It is lowered and I can't remember any specific problems with speed humps other than a need to approach them very cautiously ! Parking head on against a kerb is probably more of a pain than speed bumps tbh with the lower ride height.

I set mine KW's to the lowest end of the factory 968 Clubsport ride height tolerance (the lowest specified for 4cyl road cars IIRC).
- Front caster mount bolt head face 157mm below the wheel ctr
- Rear torsion bar ctr 47mm below the wheel ctr

This sets the steering arms parallel to the ground, helping to minimise bump-steer effects and maintains the ball joints within their designed operating range. I find the same as Jon regarding speed humps and kerbs.

For track use I run 205/55/15 tyres which lower the car a further 15mm and sharpens-up the gear ratios.

Corrected above to below...

 

[sulzeruk]

Pics of the Bilstein. Note the dual rate tapered spring. They have the standard massive chromed body top with the damper upside down inside them. My 911 has the same setup of B6.

 

[Jonny944CS]

Very nice, is the larger Ø piston rod designed to improve the strut assembly stiffness?

Do you know the rates of the progressive springs?

 

[sulzeruk]

Don't know the spring rate. The slider is certainly a large diameter, just under the diameter of the leg. Must make it very rigid with zero flex. Don't know what the spring rate is. All the parts are stamped with 951 parts numbers.
Alasdair

 

[zcacogp]

Crumbs. And are those to fit the early or the late model 944's?

(I wanted Bilsteins on my S2, but was told that they weren't available - and I went for the Koni's as a second option.)


Oli.

 

[sulzeruk]

Oli, they are very, very rare Turbo Cups shocks. These are what the M637 cars would have had.
Alasdair

 

[zcacogp]

Ah, thanks.

No doubt as common as hens teeth / rocking horse poo / unicorn's horns ...


Oli.

 

[944 man]

M754, Shirley?

 

[Jonny944CS]

Is that a 'turbo cup'-specific number Simon?

M638 - For '86 cars with Koni M030 type dampers

M754 - For the revised '87-'89 cars with Bilsteins (after realising the Koni units were not up to the job, perhaps???)

 

[944 man]

As far as I can remember M754 was the code for '87> European, South African and North American cars. If M638 is the code for the German '86 'Cups, then Ive learnt something today. []

 

[sulzeruk]

Sorry Simon, was getting my Ms mixed up, it is the M754 spec,
Alasdair

 

[sawood12]

ORIGINAL: edh

I would just leave it to promax - they know what they are doing []

They do but on my old car they set it with an aggressive nose-down attitude. Handled great but caused many problems for normal day to day driving, looked odd and suffered from terrible bump-steer (not necessarily a problem once you're used to it). I also had problems with headlight alignment as they couldn't be raised enough to achieve correct height so were pointing to the ground a bit. I had my Indy raise the front to flatten it out again ang it felt and looked much better for normal road driving. I would advise to lower it, but keep a flat attitude. I have no idea how much lower than the std ride height it was -std ride height seems to vary a lot anyway, but it was noticeably lower, but by no means slammed to the deck. A really nice set up I thought.