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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Spoke to many of the Mog race drivers at Snetterton about suspension alterations and it was suggested to get platform coilovers for rear suspension and take one leaf out of cart springs to make a softer ride and avoid banging on poor roads , with suplex up front. Anyone tried this. Having driven last weekend on some B roads in Norfolk its a bit tough on the present suspension !
Geneva 2016 plus 8' The Green Godess' 4 side exits .
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Suplex front is tried and tested , loved by some , disliked by others. Try a car that is fitted with the system and decide for yourself.
The rear is more of a complex issue. It is well known that Suplex are working on a solution , but although a development car is using an experimental setup , they are not really close to commercialising yet.
Coil over shocks may work, but you will be on your own working with spring rates and shock absorber settings , so it would be a question of trial and error, and you could end up spending a lot of time and money.
Just removing one leaf from the rear springs is really not sensible unless you know the start point , and the end point that you are trying to achieve. Many +8 racers removed one leaf from the 6 leaf set up, but that is a known system and the data is available to set the shock absorbers to match. Removing a leaf from the latest 4 leaf set up (which I assume your +4 has?) will not give you the same results.
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Suplex front is tried and tested , loved by some , disliked by others. Try a car that is fitted with the system and decide for yourself.
The rear is more of a complex issue. It is well known that Suplex are working on a solution , but although a development car is using an experimental setup , they are not really close to commercialising yet.
Coil over shocks may work, but you will be on your own working with spring rates and shock absorber settings , so it would be a question of trial and error, and you could end up spending a lot of time and money.
Just removing one leaf from the rear springs is really not sensible unless you know the start point , and the end point that you are trying to achieve. Many +8 racers removed one leaf from the 6 leaf set up, but that is a known system and the data is available to set the shock absorbers to match. Removing a leaf from the latest 4 leaf set up (which I assume your +4 has?) will not give you the same results. Yes you could very well be right ! The chap I spoke to was racing a plus 8 so that's where he was coming from , my car has 5 leaf spring set up and adj shocks all round but the back particularly is very hard on anything but decent roads and can be very tiring to drive on these as you have to slow down as well !
Geneva 2016 plus 8' The Green Godess' 4 side exits .
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Based on discussions with several people, including Peter Ballard, I think that the like or dislike issue with the Suplex front suspension kit depends very much on your driving style. If you want touring comfort, limited body roll, and light steering this is what the kit offers. If you want very precise and fast turn-in, extremely low body roll, and more competition oriented handling perhaps the Suplex kit is not for you. At one point there was discussion of a competition version of the Suplex kit and, if that is what you want, it may be worthwhile talking to Dan White of Suplex UK.
I have the Suplex front spring kit and it suits me well and I am looking forward to hearing more about the development of the rear coil-over system, but there is no news yet.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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my car has 5 leaf spring set up and adj shocks all round but the back particularly is very hard on anything but decent roads and can be very tiring to drive on these as you have to slow down as well ! I know what you mean. My car originally had the poor quality 4 leaf springs that Morgan were fitting in late 2011 to early 2012. They were replaced by 5 leaf spings under warranty because of the low ground clearance and the fact that I could not get in and out of my garage. Dan White of Suplex has developed some new 4 leaf asymmetric springs which are of very good quality and designed reduce axle tramp. I believe these would offer a softer ride to the 5 leaf springs and not be so subject to bottoming out.
Peter
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I agree the 5-leaf rears are too hard for real-world road use, but I'd be wary of talking to racers for advice on suspension setup, as our roads and driving conditions are simply nothing like any racetrack.
I have the latest 4-leaf springs, panhard rod, anti-tramp bars, & AVO adjustable shocks on the rear, and the Suplex kit on the front. On the potholed and crumbling roads of Gloucestershire I think it works very well indeed within the limitations of a live axle design.
Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
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Bigger fatter tyre sidewall is another way of adding extra absorption to a cars ride, often over looked.
Obsession with larger diameter wheels whilst looking great do come at a cost to comfort.
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3) 
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I had suplex fitted on my 97 +4 it lightened the steering due to the bearings and stopped the front doing the nodding donkey at speed on bumpy roads.
But my 2006 Roadster has a much better steering geometry and with AVOs fitted is just as good.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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I agree the 5-leaf rears are too hard for real-world road use, but I'd be wary of talking to racers for advice on suspension setup, as our roads and driving conditions are simply nothing like any racetrack.
I have the latest 4-leaf springs, panhard rod, anti-tramp bars, & AVO adjustable shocks on the rear, and the Suplex kit on the front. On the potholed and crumbling roads of Gloucestershire I think it works very well indeed within the limitations of a live axle design. Where do you get these latest 4 leaf springs from and is it possible to fit oneself ?
Geneva 2016 plus 8' The Green Godess' 4 side exits .
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Mulfab... 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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