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Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594459
10/09/19 08:41 PM
10/09/19 08:41 PM
Joined: Jul 2015
Posts: 637
Shropshire
MDS61 Offline
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MDS61  Offline
Talk Morgan Regular

Joined: Jul 2015
Posts: 637
Shropshire
That is a super update Richard.....I would like that for Seve'

Thanks Mark


Honesty means doing it right, even when no one is looking!

2004 Roadster S1 3.0 V6 - "Seve"

Mark
Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594503
11/09/19 07:49 AM
11/09/19 07:49 AM
Joined: Nov 2015
Posts: 1,581
Yorkshire
CooperMan Offline
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CooperMan  Offline
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Joined: Nov 2015
Posts: 1,581
Yorkshire
Richard, many thanks for the photos and update thumbs


Jon M
Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594508
11/09/19 07:54 AM
11/09/19 07:54 AM
Joined: Nov 2011
Posts: 3,053
Australia - NSW Mid North Coas...
OZ 4/4 Offline
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OZ 4/4  Offline
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Joined: Nov 2011
Posts: 3,053
Australia - NSW Mid North Coas...
Fantastic post.....


A Morgan Identified Fastidious Owner...
2011 4/4 Bespoke, 1981 Delorean, Auburn Boat Tail
Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594509
11/09/19 07:56 AM
11/09/19 07:56 AM
Joined: Sep 2014
Posts: 1,485
London
MOG 615 Offline
Has a lot to Say!
MOG 615  Offline
Has a lot to Say!

Joined: Sep 2014
Posts: 1,485
London
Richard

I am pleased that you have a good result from the SSL work.

I am also of the opinion that although the ride comfort is improved , the most noticeable difference is the vastly improved turn-in with the SSL 5L on my +8.

It really does makes driving twisty roads so much more pleasurable, and that slight "twitch" that you get with the rear weight transfer on cornering hard (especially in low friction conditions) is eradicated.

OK the conversion is not cheap, but in my opinion well worth while.


Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594519
11/09/19 08:21 AM
11/09/19 08:21 AM
Joined: Sep 2011
Posts: 12,400
Mandello del Lario, Lake Como,...
Gambalunga Offline
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Gambalunga  Offline
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Mandello del Lario, Lake Como,...
One of the interesting things is the way in which this type of suspension keeps more weight on the inside wheel which tends to stop it losing traction in hard cornering.


Peter

[Linked Image]
Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594534
11/09/19 09:31 AM
11/09/19 09:31 AM
Joined: Oct 2011
Posts: 3,334
Somerset, UK
P
PaulJ Offline
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PaulJ  Offline
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P

Joined: Oct 2011
Posts: 3,334
Somerset, UK
I have had this setup on my ARP4 for 3 years or so now, after contacting Peter Ballard who I believe may have thought up this design. I initially found the ride choppy although do not remember it bottoming out. Peter sourced the short springs and some shorter main springs which I then fitted.

The ride immediately improved, as per Richards report, however I was having problems with bottoming out when fully laden with passenger and luggage. Having screwed the spring seats to the top of their travel and set the damping slightly harder when touring laden, this has largely been eliminated except on the worst of bumps. I think a slightly longer spring would really be called for, which would lift the rear of the car a little more, this is probably what is now being used, however I cannot be bothered to spend money and time for what would be a small and occasional improvement and am pretty happy with the setup as it now is.


Paul
[Beginning to get the best out of the ARP4]
Re: Roadster 5 link rear suspension re-visited [Re: Gambalunga] #594536
11/09/19 10:04 AM
11/09/19 10:04 AM
Joined: Feb 2016
Posts: 2,175
East Harling, Norfolk UK
Richard Wood Offline OP
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Richard Wood  Offline OP
Talk Morgan Expert

Joined: Feb 2016
Posts: 2,175
East Harling, Norfolk UK
Originally Posted by Gambalunga
One of the interesting things is the way in which this type of suspension keeps more weight on the inside wheel which tends to stop it losing traction in hard cornering.


Thanks Peter, omitted to mention that although very relevant. TBH I was expecting just an improvemet in the ride with a compromise on OE roll resistance. What I got was an improvement in both thanks to Dan's magic thumbs

In retrospect it has highlighted the front end stiffness now. Dan has just emailed me suggesting I fit the SSL kit, which I may now do if it's compatible with the AVO's I already have.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1967 Land Rover series 2a SWB
1960 Velocette Venom
Re: Roadster 5 link rear suspension re-visited [Re: PaulJ] #594537
11/09/19 10:13 AM
11/09/19 10:13 AM
Joined: Sep 2011
Posts: 12,400
Mandello del Lario, Lake Como,...
Gambalunga Offline
Member of the Inner Circle
Gambalunga  Offline
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Joined: Sep 2011
Posts: 12,400
Mandello del Lario, Lake Como,...
Originally Posted by PaulJ
I have had this setup on my ARP4 for 3 years or so now, after contacting Peter Ballard who I believe may have thought up this design. I initially found the ride choppy although do not remember it bottoming out. Peter sourced the short springs and some shorter main springs which I then fitted.

The ride immediately improved, as per Richards report, however I was having problems with bottoming out when fully laden with passenger and luggage. Having screwed the spring seats to the top of their travel and set the damping slightly harder when touring laden, this has largely been eliminated except on the worst of bumps. I think a slightly longer spring would really be called for, which would lift the rear of the car a little more, this is probably what is now being used, however I cannot be bothered to spend money and time for what would be a small and occasional improvement and am pretty happy with the setup as it now is.

Peter Ballard was the designer of the SSL (previously Suplex) 5 link suspension. It was still in development when Morgan first saw it but for some reason or other they decided to develop their own design. I know that Peter did offer some advice as the system was developed from one version to the next.

A longer spring would allow an increase of the preload but the result would be a higher static ride height and the possibility of the suspension topping out on the rebound. As the spring rate would not change the travel, when hitting a bump, would remain the same. Because we had the same problem when touring I had SSL make me a slightly higher rated spring for our 5L suspension.


Peter

[Linked Image]
Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594539
11/09/19 10:14 AM
11/09/19 10:14 AM
Joined: Sep 2014
Posts: 1,485
London
MOG 615 Offline
Has a lot to Say!
MOG 615  Offline
Has a lot to Say!

Joined: Sep 2014
Posts: 1,485
London
Originally Posted by Richard Wood
Originally Posted by Gambalunga
One of the interesting things is the way in which this type of suspension keeps more weight on the inside wheel which tends to stop it losing traction in hard cornering.


Thanks Peter, omitted to mention that although very relevant. TBH I was expecting just an improvemet in the ride with a compromise on OE roll resistance. What I got was an improvement in both thanks to Dan's magic thumbs

In retrospect it has highlighted the front end stiffness now. Dan has just emailed me suggesting I fit the SSL kit, which I may now do if it's compatible with the AVO's I already have.


Richard

I can certainly recommend the SSL front kit, I suspect you will find it will OK-ish with the AVOs but perhaps better with a set of adjustable Spax specifically developed for this application by Dan and Peter , or the original ( to this kit) non-adjustable Bilsteins (which I have)


Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
Re: Roadster 5 link rear suspension re-visited [Re: Richard Wood] #594543
11/09/19 11:05 AM
11/09/19 11:05 AM
Joined: Nov 2015
Posts: 1,581
Yorkshire
CooperMan Offline
Talk Morgan Enthusiast
CooperMan  Offline
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Joined: Nov 2015
Posts: 1,581
Yorkshire
Despite my 3.7 being equipped with the 5 link, after only a couple of months I just had to swop the front to SSL, I had obviously become used to the front end feel of SSL for 5 years on the previous Roadster


Jon M
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