Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) Upgrade front suspension for 'trads' advert

Not quite, the ride height adjuster doesn't alter the length of the spring, there's no preload applied. The adjustment is there to ensure there is no preload on either main or rebound spring. The available suspension travel should always work out to be the same, and the rising rate stops bottoming out.

I confess to being a bit of an evangelist about this mod, it has made a major improvement to my car, as far as I can see there is only one downside, the cost.

Tim, thanks - good explanation - if you are an evangelist I hate to think what that makes me? Juts kidding.... PJB.

Nputtick - SUPLEX has set up the initial spring rate to suit all weights of Morgan, thus the ride quality between a light 4/4 and a heavy Roadster is very difficult to tell apart. The rising rate spring comes in pretty quickly in a bump or hard cornering and that again feels the same for all car weights to limit roll and full bump events.
SUPLEX also worked with Bilstein in their UK Tech Centre to set up the dampers for road work, either just pottering along a bumpy back street or fast 'A' road work, again to suit all weights of car. These are non-adjustable monotube dampers so have a more controlled characteristic that is difficult to achieve with even good quality adjustables. Also of course these Bilstein non-adjustable dampers give the owner a good combination of ride and handling without needing to be adjusted for different usage or heaven forbid 'mal-adjusted', as if anybody would. The Bilsteins are gas pressurised to prevent cavitation that would otherwise reduce damping over large bumps and have a sealed separator piston in the tube that keeps the gas and oil apart to avoid foaming and thus loss of damping when worked hard, something not fitted in most cheap dampers.
So a lot of development work and highly sophisicated dampers in the kit. I trust this helps - PJB.

Thomas, all the bush types (bronze or Nylon) are interference fits in the hub tube. So can be pushed out or further in to fit a lip seal. But if you push them in then they may not stay exactly in line and watch where the grease nipple is!
Not exclusively my idea - as many know a lip seal od 1.25 inch, id 1.0 inch by 3mm wide (excuse units) (around £2.00 GBP each) will fit in the end of the hub tube to keep dirt out. I fit with the lip pointing outwards to concentrate on keeping dirt out. NB The tube id is around 1.229 inch so too small for a 1.25 inch seal to push straight in. These seals need their od skimming slightly to fit. I push them onto a 1 inch rod and rotate them against a abrasive paper. Then tap them in.
Trust this helps - PJB.

Thanks PJB, I talked this through with John MacDonald today and will have the Suplex kit fitted later this month, along with some simple brake upgrades (s/s braided hoses, EBC greenstuff pads and cross-stay braces). He was very enthusiastic indeed about the Suplex system, saying the ride and handling are greatly improved - as he is a long-time racer of Morgans and a "proper engineer" I always think his opinion is worthwhile!

Brilliant, you've answered all my questions - thanks PJB! Will give my feedback when I've done some driving.