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Jun 14th, 2026
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Joined: Jul 2007
Posts: 27,809 Likes: 749
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,809 Likes: 749 |
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Sep 2009
Posts: 7,435 Likes: 122
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
Posts: 7,435 Likes: 122 |
Bump stops and anti tramp bars may serve you well. But they are symptom treaters. I have the 4 leaf 4 seater springs with adjustable AVOs. Do this first. The other measures may help against twisting and lateral forces. But the spring itself remains too weak.
'14 4/4 graphite grey
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Joined: Jun 2015
Posts: 2,086 Likes: 70
Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2015
Posts: 2,086 Likes: 70 |
Bump stops and anti tramp bars may serve you well. But they are symptom treaters. I have the 4 leaf 4 seater springs with adjustable AVOs. Do this first. The other measures may help against twisting and lateral forces. But the spring itself remains too weak. Sound advice indeed. I would be surprised if the torque delivery of a standard plus 4 really merits anti tramp unless you are into really flooring it with racing starts.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Joined: May 2012
Posts: 1,703 Likes: 35
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,703 Likes: 35 |
4 seater springs may serve you well. But they are symptom treaters  I see the problem as the very limited rear suspension movement that these cars have. Stiffer 4 seater springs is certainly one way to stopping the knocking that can occur from insufficient room. I have a different perspective and see my ‘soft springs’ as a good thing. I believe softer springs give better comfort, allow better traction on a choppy road surface and their 135lbf/inch rate is a close match to the rate of my front spring giving a good overall balance to the car. Progressive stops tackle the problem of limited movement by complimenting the leaf springs with a rising rate at the end of the suspension travel. Whilst preventing body contact they also reduce body movement/roll too. Another subtle advantage is that they absorb some of that horrible jiggly vertical axle energy and allows me to run my Rutherford AVO’s on the comfy setting.
Roger
2011 Plus 4
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Joined: Dec 2018
Posts: 1,309 Likes: 5
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Dec 2018
Posts: 1,309 Likes: 5 |
Bump stops and anti tramp bars may serve you well. But they are symptom treaters. I have the 4 leaf 4 seater springs with adjustable AVOs. Do this first. The other measures may help against twisting and lateral forces. But the spring itself remains too weak. Sound advice indeed. I would be surprised if the torque delivery of a standard plus 4 really merits anti tramp unless you are into really flooring it with racing starts. Im not driving Miss Daisy  I give it some beans when setting off and it tramps. I imagine its a bigger problem on bigger engine cars but still, needs sorting. EDIT- on bumpy-ish surface. On smooth even surface it doesnt do it.
Last edited by Bonesie; 23/05/19 07:52 AM.
Bonesie Current stead -'The Captain' Black +4 'Life is like a garden, dig it' *Joe Dirt 
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Joined: Mar 2009
Posts: 3,824 Likes: 69
Talk Morgan Addict
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Talk Morgan Addict
Joined: Mar 2009
Posts: 3,824 Likes: 69 |
4 seater springs may serve you well. But they are symptom treaters I see the problem as the very limited rear suspension movement that these cars have. Stiffer 4 seater springs is certainly one way to stopping the knocking that can occur from insufficient room. I have a different perspective and see my ‘soft springs’ as a good thing. I believe softer springs give better comfort, allow better traction on a choppy road surface and their 135lbf/inch rate is a close match to the rate of my front spring giving a good overall balance to the car. Progressive stops tackle the problem of limited movement by complimenting the leaf springs with a rising rate at the end of the suspension travel. Whilst preventing body contact they also reduce body movement/roll too. Another subtle advantage is that they absorb some of that horrible jiggly vertical axle energy and allows me to run my Rutherford AVO’s on the comfy setting. That's exactly how I see it. I fitted Rogers bump stops with my "soft" (it's all relative isn't it ) springs and it transformed the car. Far better than my previous car which had harder leaf springs. Much less jumping around in corners. The compliance really helps and the bump stops are progressive so work in a very subtle way. I'd thoroughly recommend them as a first step. They aren't expensive and even if you don't find it enough of a solution, they are a great permanent fixture whatever setup you finally go with. Nick
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Joined: Sep 2009
Posts: 7,435 Likes: 122
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
Posts: 7,435 Likes: 122 |
Well, there are different philosophies and in the end only that counts what each one is satisfied with.
But I have to stress that in my case the standard leaf springs were too soft and that the 4 leaf 4 seater springs are still very comfortable. On the contrary, because these new springs are at the right working point I can adjust the dampers softer and the end result is more comfortable than before with too soft springs that had to be slowed down by hard adjusted dampers. The balance is maintained because I also have the tighter Mulberry 140 pounds in front.
Last edited by Heinz; 23/05/19 09:52 AM. Reason: no sales offering in this section.
'14 4/4 graphite grey
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Joined: Dec 2018
Posts: 1,309 Likes: 5
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Dec 2018
Posts: 1,309 Likes: 5 |
Bump stops. Am I right in saying that they stop the springs bumping on the frame ? But the springs still bang onto the bump stops ? So they dont 'fix' a problem, they make the bump a bit softer?
Bonesie Current stead -'The Captain' Black +4 'Life is like a garden, dig it' *Joe Dirt
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Joined: Jul 2011
Posts: 1,244 Likes: 30
Has a lot to Say!
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Has a lot to Say!
Joined: Jul 2011
Posts: 1,244 Likes: 30 |
Bonesie See Rogers bump stops Especially the graphs which show how the stops work.
Last edited by IcePack; 23/05/19 11:24 AM.
4/4 Ivory 4.1:1 axle, Mercedes A200 AMG
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Joined: Sep 2011
Posts: 14,748 Likes: 158
Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,748 Likes: 158 |
Fit 5 link supension. You get a comfortable ride, panhard rod, and there is no need for anti tramp bars. Handling is improved as well.
You will never get a limousine ride with a Morgan because of the ancient chassis design an the limited travel but a 5 link suspension system will keep everything under control and optomise what you do have. Even Morgan went to a 5 link system on the ARP4.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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