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Joined: Feb 2016
Posts: 7,941 Likes: 218
Talk Morgan Guru
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Talk Morgan Guru
Joined: Feb 2016
Posts: 7,941 Likes: 218 |
But to my mind that friction is just another damping component on the leaf spring setup and would be compensated for by having a slightly softer damper setup.
If you put exactly the same damper on both setups then I think it would be harsher on the leaf spring setup due to the friction.
So why not just soften the leaf spring damper to compensate. Sorry to bring this discussion up again Bob but you got me thinking about above. I totally agree that leaf springs have their own built-in damping however it seems to me this is far greater on compression than rebound, the exact opposite of the ideal. A multi-leaf spring under increasing compression will have the tips of the lower shorter leaves sliding outwards over the leaf above and so on upwards, as the whole spring tends towards flat. Each of these sliding actions under compression will be resisted by some friction no matter how well lubricated the spring is, creating a natural damping effect. On rebound the reverse will happen but with much reduced weight so the total friction and therefore natural damping in the whole spring will be much less, although controlled by the external damper. These thoughts are born out by experience with my Land Rover when I had parabolic leaf springs fitted. These have only two leaves hence only two sliding surfaces so far more compliant, so much so that matching longer travel dampers are required.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Jul 2020
Posts: 19 Likes: 1
New to Talk Morgan
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New to Talk Morgan
Joined: Jul 2020
Posts: 19 Likes: 1 |
Front or rear? Right or left corners? Certainly not something I have experienced.
If it is front I really can't imagine but if it is rear lift the tool tray out and look for anything which may be too close to a moving part. The rear setup may require a little adjustment too. ] The squeaking is coming from the rear right.
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Joined: Sep 2011
Posts: 14,723 Likes: 149
Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,723 Likes: 149 |
I have fitted springs with a higher rate to the rear because of the often heavy luggage loads that we carry. The dampers only have adjustment on compression and I have the feeling that I need to increase the rebound damping rate to compensate for the higher rate springs. I will probably remove the dampers over winter and send them to SSL to get them serviced and adjusted as appropriate. Seems odd Peter that the dampers SSL provide are only adjustable for compression given the greater need for rebound damping. I don't think the dual rate SSL coilover upgrade to factory five link I have would offer the improved compliance to road surface that it does if it created greater compression damping. You can actually feel the initial softer springing static, whilst pushing down on the bodywork. Surely SSL's own 5 link conversion won't be so different. I just went and checked the manual. The adjust on the Quantam OneZero shocks that I have are adjustable on both rebound and compression, but not differentially. The adjustment only effect the slow speed damping. High speed damping is fixed. Before the lockdown it had been my intention to take the car out, with the tool tray removed, and try to adjust the dampers to the best results going over the same speed hump multiple times.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Feb 2016
Posts: 7,941 Likes: 218
Talk Morgan Guru
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Talk Morgan Guru
Joined: Feb 2016
Posts: 7,941 Likes: 218 |
Thanks Peter, that makes sense as long as the rebound damping for any given setting is greater than compression.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Jul 2020
Posts: 19 Likes: 1
New to Talk Morgan
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New to Talk Morgan
Joined: Jul 2020
Posts: 19 Likes: 1 |
Just a quick update to say that the chaps at Williams have solved the squeaking issue and, with it, the rear SSL seems to have dramatically improved and now seems worth the money.
I'm not sure what happened, but all's well that ends well.
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Joined: Oct 2017
Posts: 41 Likes: 1
Just Getting Started
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Just Getting Started
Joined: Oct 2017
Posts: 41 Likes: 1 |
Brize I think you will find that the either 1 or all of the torsion bushes were over tightened so not enabling them to do there job,I have a 2014 plus 4 and after 2500 mile had to change the suspension to SSL what a difference ,car handles so much better and is more comfortable,panhard rod makes a difference,car now faster and more planted round corners, well done SSL
duncan series 1 climax, TR +4, plus 4 GDI
SSL F&R suspension
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