Exactly. And why the need for steering dampers on some cars fitted with Suplex? Perhaps this is a weight issue on heavier cars such as Roadsters and Plus 8's.
And what's wrong with the British dampers extensively tested and fitted by Morgan. Susplex uses Bilstein dampers - why does Suplex require different dampers than those already fitted.
The need for a steering damper is nothing at all to do with the front suspension spring rate. It's to address an issue which arises from the interaction between the castor angle, tyre width, track rods, and so on.
Earlier cars had steep castor angles (4 degrees), narrow tyres (165s), and worm and peg steering boxes. They tended to suffer from steering flutter/shimmy, which was removed by fitting the damper blades.
Later cars with their shallower castor angles (6 degrees), wide tyres, and rack and pinion steering, were found not to suffer from the effect, and so the damper blades were removed.
If a car needed the damper blades (or an equivalent - some people prefer removing the damper blades and using a telescopic steering damper instead) before fitting the Suplex kit, then it will need one afterwards, and vice-versa.
As for the need for different shock absorbers, every other car on the road today has shock absorbers which have had their bump and rebound characteristics tailored to suit the spring rates and roll characteristics of the car to which they are fitted. Change the spring characteristics and you need to change the damping characteristics too.
Why on earth would anyone imagine that this would not be necessary on a Morgan? (Who AIUI source their standard dampers from the Far East).
