Click here to return to the home page.
Image of a road.
Who's Online Now
1 registered members (Hamwich), 154 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 244
Hamwich 138
Image 110
CooperMan 107
Newest Topics
Shooting nr Frankfurt
by +8Rich. 19/02/20 11:22 PM
Engine trouble
by Obie. 19/02/20 09:57 PM
Grill Removal (Plus 4)/Powdercoating?
by Nostalgiajohn. 19/02/20 11:49 AM
Retromobile Paris 2020
by nestor59310. 18/02/20 10:52 PM
Nice day for it
by Landy. 18/02/20 09:18 PM
Damp membrane and fuel line
by Image. 18/02/20 06:29 PM
Airbag
by DanT. 18/02/20 02:25 PM
Latest Photos
Today at Krazy Horse
Mild winter en Provence
A few more NZ pics
Travels in New Zealand
Crovie and Gamrie, North East Scotland.
Newest Members
Tipracer, George Okuda, Alice, ahdguy, Colin725
6829 Registered Users
Forum Statistics
Forums34
Topics37,285
Posts605,810
Members6,829
Most Online1,033
Dec 28th, 2019
Today's Birthdays
Boshly
Previous Gallery
Next Gallery
Print Thread
Page 1 of 2 1 2
Leaf Springs & the Frame #555298
22/01/19 09:07 AM
22/01/19 09:07 AM
Heel_Board_Contact.jpg
Joined: Jul 2011
Posts: 538
I
IcePack Offline OP
Talk Morgan Regular
Leaf Springs & the Frame

Expand image & you can see the telltale mark.
11 Comments
Re: Leaf Springs & the Frame [Re: IcePack] #555317
22/01/19 12:04 PM
22/01/19 12:04 PM
Joined: Aug 2010
Posts: 2,689
Costock, South Nottinghamshire...
Paul F Offline
Talk Morgan Expert
Paul F  Offline
Talk Morgan Expert

Joined: Aug 2010
Posts: 2,689
Costock, South Nottinghamshire...
That is similar to my findings on our Feb-14 4/4 2 seater.

A set of Mulfab 4 seater 4 leaf springs sorted the issue. Now much more comfortable and no bangs.


Paul
Costock, UK
2014 4/4 Rolls Royce Garnet Red
Disco 4
Teddy - 17h1 Irish Draught cross
Re: Leaf Springs & the Frame [Re: IcePack] #611577
08/01/20 10:27 AM
08/01/20 10:27 AM
Joined: Mar 2019
Posts: 11
Bath
J
jackmorini Offline
New to Talk Morgan
jackmorini  Offline
New to Talk Morgan
J

Joined: Mar 2019
Posts: 11
Bath
I have a similar problem on my 2013 4/4 2 seater. Both springs show marks & on the righthand side the bulkhead is splintered.
Rog's excellent 'bump' stops are now fitted but I'm just wondering what the difference is with the 4 seater 4 leaf springs.
Is the rate firmer or the camber higher?

Re: Leaf Springs & the Frame [Re: jackmorini] #611587
08/01/20 12:40 PM
08/01/20 12:40 PM
Joined: May 2012
Posts: 940
Sumerset
Rog Offline
Talk Morgan Regular
Rog  Offline
Talk Morgan Regular

Joined: May 2012
Posts: 940
Sumerset
Originally Posted by jackmorini
I'm just wondering what the difference is with the 4 seater 4 leaf springs.
Is the rate firmer or the camber higher?

Jack this was my recent experience.

I had the original saggy factory springs replaced on my +4 with 4 seater springs. Not because I had issues particularly with the ride or bottoming or the car not being level but the ground clearance was dire.

Both the regular 2 and 4 seater springs manufactured in the UK and supplied by BCC have the same spring rate I believe so offer the same ride quality. As only the camber differs the benefit of the extra height was appealing to me. However unlike others the 4 seater springs didn’t work out with my car. I only had them in for a single 20 mile run before reverting back to 2 seater springs.

My attempt at an explanation….
The issue I believe was the camber. It would appear that with the increased camber yes you gain bump travel and ride height but it is traded for a reduction in extension travel.

When I drove the car with the 4 seater springs the ride was comfortable and indeed very similar to the 2 seater but I could detect the subtle feel of the rebound rubbers making contact under the axle. The pics below might help. The top pic is the new 4 seater spring with the extra camber and below is the new 2 seater spring. In the top pic with the extra camber you can see that there is only about 4mm clearance under the U-bolt nut to the chassis return. In order to prevent the nuts making contact with the chassis and causing long term chassis damage the rebound rubbers had to be set so high that there was zero static clearance between the axle and rubbers (I’ve read that there should be at least 10mm). So consequently with my light weight 2 seater car and a 10 1/2 stone whimp at the wheel the axle was effectively riding on the rubbers with no or at least very little suspension extension travel. I suspect that it might have all been different with a heavier set up that applied a greater preload to the springs.

[Linked Image]
So now I’m back with a pair of regular 2 seater springs. The ride is still the same but with the extension travel has been restored, the car is level to within about 5mm (unloaded) and the ground clearance is so much better than the factory originals. An interesting exercise…….

PS – The spacer in the top pic is there only to adjust the ride height.


Roger
2011 Plus 4
Re: Leaf Springs & the Frame [Re: IcePack] #612184
12/01/20 01:59 PM
12/01/20 01:59 PM
Joined: Mar 2019
Posts: 11
Bath
J
jackmorini Offline
New to Talk Morgan
jackmorini  Offline
New to Talk Morgan
J

Joined: Mar 2019
Posts: 11
Bath
Developments: I've now fitted AVOs at the rear. Initial impressions are good. The 'cattle-grid' test was much smoother - most cars I've had would give a 'notchy' ride depending on the speed (usually faster is better :-)). But a fast overtake at about 70mph on an 'A' road resulted in some bouncing. I've set the damping at 10 stops (out of 25) up from softest. What do people suggest?

Re: Leaf Springs & the Frame [Re: IcePack] #612187
12/01/20 02:38 PM
12/01/20 02:38 PM
Joined: Dec 2008
Posts: 18,166
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 18,166
South Yorkshire
Start from the hardest setting Jack, and click to softer.

It's a while since I clicked mine but I don't recall 25 clicks. I recall it was about 14. But anyway, I run mine 3 or 4 up from softest......so whatever that is down from hardest setting.


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) AR Plus 4
Re: Leaf Springs & the Frame [Re: IcePack] #612199
12/01/20 04:05 PM
12/01/20 04:05 PM
Joined: Sep 2014
Posts: 1,880
YORK
KEVFITZ Offline
Talk Morgan Enthusiast
KEVFITZ  Offline
Talk Morgan Enthusiast

Joined: Sep 2014
Posts: 1,880
YORK
My AVOs on my Supersport have 10 clicks total and I run 3 at the front and 4 at the rear,,,20 psi all round.....works for me !


" I LOVE THE SOUND OF THROTTLE BODIES IN THE MORNING " (ROBERT DUVAL IN "APOCOLYPSE NOW " )
Re: Leaf Springs & the Frame [Re: jackmorini] #612220
12/01/20 06:48 PM
12/01/20 06:48 PM
Joined: May 2012
Posts: 940
Sumerset
Rog Offline
Talk Morgan Regular
Rog  Offline
Talk Morgan Regular

Joined: May 2012
Posts: 940
Sumerset
Originally Posted by jackmorini
The 'cattle-grid' test was much smoother

Ah the old cattle grid test! I haven’t been brave enough to try one with my new car. With the previous car the hood would fly up out of the rear catches and the horn button would jump out into my lap frown


Roger
2011 Plus 4
Re: Leaf Springs & the Frame [Re: Rog] #612251
13/01/20 09:08 AM
13/01/20 09:08 AM
Joined: Nov 2015
Posts: 1,671
Yorkshire
CooperMan Offline
Talk Morgan Enthusiast
CooperMan  Offline
Talk Morgan Enthusiast

Joined: Nov 2015
Posts: 1,671
Yorkshire
Originally Posted by Rog
Originally Posted by jackmorini
The 'cattle-grid' test was much smoother

Ah the old cattle grid test! I haven’t been brave enough to try one with my new car. With the previous car the hood would fly up out of the rear catches and the horn button would jump out into my lap frown


You need to grit your teeth & drive over it much faster flag laugh2


Jon M
Re: Leaf Springs & the Frame [Re: IcePack] #612257
13/01/20 11:47 AM
13/01/20 11:47 AM
Joined: Dec 2008
Posts: 18,166
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 18,166
South Yorkshire
The weak springs era shows what happens when a cost cutting mentality is applied to mechanical and engineering items.

Way back I did an audit at a major spring manufacturer in Sheffield who at that time were working on valve springs for the Ford Zetec engine.......it was a very long time ago. I had a long chat with one of the development engineers, and was amazed at the level of engineering which they put into every design.

Just because a leaf spring looks like a leaf spring doesn't mean it works like a leaf spring , and somebody at Morgan who made that decision either didn't understand the engineering, or didn't care about the consequences of cutting those costs.

My 2012 was at the end of the weak spring era, but we toured Scotland on the bump stops, whereas had I changed the springs earlier it would have been far more enjoyable. The four seater springs were just the job in my case......................


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) AR Plus 4
Page 1 of 2 1 2

Moderated by  Aeroman 

Powered by UBB.threads™ PHP Forum Software 7.7.1