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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:06 pm 
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JeremyB wrote:
Carrera RSR wrote:
JeremyB wrote:
Looks like it just needs a machined spacer either end as Stan said


Why?


Reading Stans sketch i wouldn't want the sleeve as the only point of contact, looks like a potential weak point to me.


Exactly!

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1986 924S. Needing love but, back on the road and loving it!
1986 928 S2 Long term project. Been in storage, needs full recommissioning.
1981 2.0 N/A. Still not running and I’ve had it for months!
1979 Mercedes 450SLC
1955 Land Rover Series 1 107 pick up
1981 VW T25 camper. ‘The nail’ very slow diesel burner.
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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:10 pm 
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Location: Penzance, Cornwall
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Carrera RSR wrote:
dd924 wrote:
Even on the originals the bush takes all the contact load, if the rubber did touch the sides it would gradually wear away with movement. The bolt has a large torque (Not checked the book but M14 HT = 100+ ft-lbs range), the clamping force is enormous.


+1

Just fit the shocks as they are. Mines lasted 9yrs with some spirited use albeit on steel arms v ally ones. Remember the weight of the car is mostly on the torsion bars and NOT the shock. Take the shock out and the car still stands up! Just has no bounce control


In all reality, it looks like I am going to have to fit them. However, why not make it so the rubber bushcovers the sleeve and increases contact area as per the original? Why do we have to discuss ways of ‘making it right’?
Surely the point is, it should just be right?
If we made aircraft with those tolerances, we wouldn’t have to worry about them falling out of the sky - they’d never make it halfway along the runway!!

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1986 924S. Needing love but, back on the road and loving it!
1986 928 S2 Long term project. Been in storage, needs full recommissioning.
1981 2.0 N/A. Still not running and I’ve had it for months!
1979 Mercedes 450SLC
1955 Land Rover Series 1 107 pick up
1981 VW T25 camper. ‘The nail’ very slow diesel burner.
1991 Toyota Celica. At £182, too cheap to refuse....


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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:14 pm 
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Model: 924S
mike.gamble wrote:
JeremyB wrote:
Carrera RSR wrote:
JeremyB wrote:
Looks like it just needs a machined spacer either end as Stan said


Why?


Reading Stans sketch i wouldn't want the sleeve as the only point of contact, looks like a potential weak point to me.


Exactly!


Mike, draw me a sketch of what size spacer you need, I will run the router and make you a set if your ok with Polypropylene, it's three times stronger than steel so should be fine in this application.

Give me the OD, ID and thickness of spacer you need.

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Current progress on the S https://porsche924.co.uk/forum/viewtopic.php?t=21946

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1981 924 2.0 n/a
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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:22 pm 
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PM me you address and i can get them shipped to you.

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Current progress on the S https://porsche924.co.uk/forum/viewtopic.php?t=21946

1987 924S
1981 924 2.0 n/a
2016 BMW 640D Msport
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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:30 pm 
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Cheers for that, it’s appreciated. I’m hopefully having a free afternoon this week so I may go up the unit, drop the rears off the S and compare/measure them against the new ones.
I’ve also got to try and set them up properly - another reason for my quest for a ‘standard’ shock.

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1986 924S. Needing love but, back on the road and loving it!
1986 928 S2 Long term project. Been in storage, needs full recommissioning.
1981 2.0 N/A. Still not running and I’ve had it for months!
1979 Mercedes 450SLC
1955 Land Rover Series 1 107 pick up
1981 VW T25 camper. ‘The nail’ very slow diesel burner.
1991 Toyota Celica. At £182, too cheap to refuse....


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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:39 pm 
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Location: Bournville - Land of Chocolate
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I'm amazed this thread is still ongoing. The bush doesn't need to be in contact with the arm. All the loading forces are transmitted into the arm through the bolt and its sleeve. Those dampers are good to go

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1985 924S Historic Road Rally / Targa Rally Car


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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:52 pm 
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The GAZ set is Correct!! No redesigning necessary :bang: the rubber or additional rubber/poly sleeve is totally redundant.

Marks race car rear suspension.


Attachments:
8D0B67FB-0E40-4AF3-853E-659EAFE9FDA0.jpeg
8D0B67FB-0E40-4AF3-853E-659EAFE9FDA0.jpeg [ 2.65 MiB | Viewed 201 times ]

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Steve
1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 225bhp @ 1.0bar on previous CGT turbo, Engine datalogged and on boost fuel enrichment managed with Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
2017 VW Passat Variant GTE Advance - the daily load lugger and mile muncher
2015 Nissan Leaf Tekna - it builds trees when we drive it
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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 8:58 pm 
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Nige wrote:
I'm amazed this thread is still ongoing. The bush doesn't need to be in contact with the arm. All the loading forces are transmitted into the arm through the bolt and its sleeve. Those dampers are good to go


How is a downward load going to transmit through an arm? That's a sheer force not lateral. Without supporting the bolt and sleeve you would increase the strain on the bolt due to the reduction in surface area contact a spacer will provide and direction of load.

Steve, what you are showing is correct and is not what Mike has drawn.

That race car does have a conical sleeve, Mike's dwg shows a thin wall sleeve over the bolt, not the same thing.

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Current progress on the S https://porsche924.co.uk/forum/viewtopic.php?t=21946

1987 924S
1981 924 2.0 n/a
2016 BMW 640D Msport
2007 Porsche Cayenne


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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 10:17 pm 
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It’s not thin wall and the bolt will be man enough under that sleeve. It’s the same set up for numerous race 944’s using GAZ. If they failed, GAZ would have found out many years ago.

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Steve
1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 225bhp @ 1.0bar on previous CGT turbo, Engine datalogged and on boost fuel enrichment managed with Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
2017 VW Passat Variant GTE Advance - the daily load lugger and mile muncher
2015 Nissan Leaf Tekna - it builds trees when we drive it


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 Post subject: Re: Rear shocks for S/944 NLA. Options?
PostPosted: Mon Jan 14, 2019 10:20 pm 
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944 GAZ coilovers


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C24CE52A-3580-4F7F-A591-EA42CD2D6FA9.jpeg
C24CE52A-3580-4F7F-A591-EA42CD2D6FA9.jpeg [ 48.27 KiB | Viewed 191 times ]

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Steve
1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 225bhp @ 1.0bar on previous CGT turbo, Engine datalogged and on boost fuel enrichment managed with Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
2017 VW Passat Variant GTE Advance - the daily load lugger and mile muncher
2015 Nissan Leaf Tekna - it builds trees when we drive it
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