Shock time

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Racing Tortoise
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  Z1 roadster
Location: W2

Shock time

Post by Racing Tortoise » Tue 21 May, 2013 15:50

My Z1's become quite unpleasant to drive lately with the back feeling loose and skittish, particularly over broken surfaces and there was a noticeable judder on the steering between 55 and 65mph (although not below that or above it). Thought the former was possibly subframe bushes and the latter was a PAS fluid leak.

Anyhoo…I dropped it off at the specialist last w/end and today they rang to say yes, there was a PAS fluid leak which has been fixed but the problem at the rear is not the bushes and I wasn't imagining things! Turns out the driver's side rear shock absorber had failed and was totally devoid of fluid and thus pressure, and its twin on the other side was on the way out too. Nice, and I was doing a very brisk pace indeed on the motorway on the way down to Sussex. :shock:

So that's two new OEM shocks which need to be ordered from Germany at £130 each. Presume that's the best option? The alternative is apparently fitting eg Eibachs but then you need to change all four (the fronts are ok) and the springs, which is not worth it.
Currently: bereft of Z1
Previously: 1991 Ur-grun Z1 and 1991 Traum-schwartz Z1

sfh3l
Joined: Fri 02 Sep, 2005 17:07
Posts: 552

  Z1 roadster
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Re: Shock time

Post by sfh3l » Tue 21 May, 2013 19:49

Hey RT,

I found the OEM ones very soft and wallowy when I got my Z1 and went for a set of SPAX dampers. Much better and much less of a floaty feeling. Not expensive and based in Bicester, just up the road.
Best regards,

Sam Lever.

Anyone who says money isn't everything hasn't found the right classic car yet.
Z1 - 3.0csl - 987 Boxster - Austin 7 Special - Rolls 20 - '72 911 - '95 318is
Black Sport Evo M3 & SG M3 CSL - now someone else's pleasure
Blue 2800cs - now someone else's pain
Old cars - the original "Not for Profit" organisation
Independent Financial Adviser in Buckingham
My Financial Blog

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Racing Tortoise
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Posts: 888

  Z1 roadster
Location: W2

Re: Shock time

Post by Racing Tortoise » Wed 22 May, 2013 10:36

sfh3l wrote:Hey RT,

I found the OEM ones very soft and wallowy when I got my Z1 and went for a set of SPAX dampers. Much better and much less of a floaty feeling. Not expensive and based in Bicester, just up the road.
Thanks. How knackered were they by that stage though? And did you need new springs with the SPAX?
Currently: bereft of Z1
Previously: 1991 Ur-grun Z1 and 1991 Traum-schwartz Z1

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Jet
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Re: Shock time

Post by Jet » Wed 22 May, 2013 15:58

Racing Tortoise wrote:
sfh3l wrote:Hey RT,

I found the OEM ones very soft and wallowy when I got my Z1 and went for a set of SPAX dampers. Much better and much less of a floaty feeling. Not expensive and based in Bicester, just up the road.
Thanks. How knackered were they by that stage though? And did you need new springs with the SPAX?
Sam put the knackered ones on my car :D

They' have been fine so far, normal, my original inserts didn't feel right. I preferred the softer dampers to cope with London conditions and negate the harsher ride of my bigger wheels and lowered suspension.

ChrisS
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Location: Witney

Re: Shock time

Post by ChrisS » Wed 22 May, 2013 23:53

My last MoT had an advisory on rusting rear springs. Is that likely to be expensive and what are the options? The damping feels fine, by the way.

felix
Joined: Sat 02 Jul, 2005 17:25
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  Z1 roadster

Re: Shock time

Post by felix » Thu 23 May, 2013 13:40

I don't think rusting rear springs are grounds for an MOT fail, at least not until they break. Which is unlikely to happen now if it hasn't happened yet.

Not sure if factory springs are still available. I think there are Spax springs available for the later cars. Eibach springs for the Z1 went out of production for a while and then they produced another batch but I think those sold out again. An old post of mine on springs: http://www.zroadster.net/forum/viewtopi ... gs#p199296

And on old post on rear shock absorbers: http://www.zroadster.net/forum/viewtopic.php?f=4&t=8664

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Racing Tortoise
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Location: W2

Re: Shock time

Post by Racing Tortoise » Thu 23 May, 2013 15:56

Have decided to stick with the standard rear shocks myself. I've asked about the rear springs on mine and am told that they are in perfectly good nick with no sign that they need replacing. Apparently the most common issue is for them to to fatigue and snap near the ends. No idea whether rust might preface that.
Currently: bereft of Z1
Previously: 1991 Ur-grun Z1 and 1991 Traum-schwartz Z1

tg184
Joined: Wed 23 May, 2012 21:03
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  Z1 roadster

Re: Shock time

Post by tg184 » Mon 27 May, 2013 15:28

This may be too late to help, but FWIW I drove a car with the Spax kit (& sitting on slightly lowered springs), and I was very impressed. It seemed to ride pretty well still, but just feel a bit more planted and purposeful than I remembered the standard car doing.

Which really surprised me, because I really, really hate stiff 'sports' suspension setups. YMMV, etc...
FOR: Balance
AGAINST: Yours will be in doubt at this price

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sfh3l
Joined: Fri 02 Sep, 2005 17:07
Posts: 552

  Z1 roadster
Location: Buckingham

Re: Shock time

Post by sfh3l » Tue 28 May, 2013 17:01

Jet wrote:
Sam put the knackered ones on my car :D

They' have been fine so far, normal, my original inserts didn't feel right. I preferred the softer dampers to cope with London conditions and negate the harsher ride of my bigger wheels and lowered suspension.
That sounds terrible! You did ask me to. :D
They weren't knackered at all. Just too soft for my liking, with my small wheels and rural lifestyle :D
Best regards,

Sam Lever.

Anyone who says money isn't everything hasn't found the right classic car yet.
Z1 - 3.0csl - 987 Boxster - Austin 7 Special - Rolls 20 - '72 911 - '95 318is
Black Sport Evo M3 & SG M3 CSL - now someone else's pleasure
Blue 2800cs - now someone else's pain
Old cars - the original "Not for Profit" organisation
Independent Financial Adviser in Buckingham
My Financial Blog

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Jet
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Re: Shock time

Post by Jet » Wed 29 May, 2013 10:02

sfh3l wrote: That sounds terrible! You did ask me to. :D
They weren't knackered at all. Just too soft for my liking, with my small wheels and rural lifestyle :D
Nooooooo :shock: Not at all, In fact quite the opposite, by process of elimination I got rid of the wishy washy problem at the back, plus I learnt how to remove the front struts off the car, put to good effect when fitting the Eibach springs.

Thanks to you

:cheers

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