The Empire upper wishbone corrects the faulty geometry that the factory, in their wisdom, decided to use. All cars these days, except Morgan, use unequal length upper and lower wishbones, Morgan decided that they know better, rather as they do with the sliding pillars on the 4 wheelers, and used equal length wishbones. The problem is that when the suspension goes up and down, the wheel does not stay in the same plane both from the front and the side - castor and camber. Bump steer was caused by the height of the track rods being wrong, although, I suspect they were correct in the pre-production cars, for some reason things changed when the started making the car. Hence the reason that something as simple as correcting the drooping tie rods can more or less, stop the wheels changing their toe setting every time the suspension changes.
The castor and camber change are much more subtle, but they do change, [one has only to jump up and down on the front chassis member to see this happening at first hand], and that is where the Empire upper wishbones will work, either with the current Morgan setup or the so called 'comfort' kit which they supply.
To sum up Charles, I would say that the Empire upper wishbones are not such a dramatic improvement right away, but work in a far more subtle way, and as Heinz says, it could be the most significant single upgrade that an owner could do, especially once the compensator and BB box are sorted. They also allow the front end geometry to be infinitely adjustable for castor and camber, should anyone like to play around. Although I only had just under 3000 miles on my car when I sold it, there was no discernible wear on the tyres, and nor should there be as they were running at their most efficient.
I am amazed but not surprised that no one from the factory has ever bothered to contact Bill at Empire and at least have a chat to him about it, although I rather suspect they will have driven an Empire equipped car by now. But then again, Morgan know everything and no-one else can tell them.
