I've still got some vibration and or shimmy on my Roadster at anything over 80mph. Has always been there and still is in spite of Suplex being fitted, new tyres all round (alloys not wires) which were carefully balanced by a good tyre shop who Mike Duncan uses and switching wheels around. The cars only done 2400 miles so can't be wheel bearings. It spoils the car.
It obviously bugged the previous owner as he had Richard Thorne rebalance at each annual service. Probably why he only did 700 miles in 4 years.
Jays - remember what I told you about the standard setup of the steering rack and how mine is now set up by Darren at New Elms. I believe NeilM has the same issue developing on his car which has now done about 9k miles. I think it is an inherent issue with the front suspension geometry that becomes more apparent as bushes and bearings wear and become free to move easier. As I explained the standard angulation of the steering rods from the steering box means that as the suspension flexes each wheel can move in a slightly different angle to the other, thus inducing a mild vibration. My setup is not perfect but I believe that it is probably as good as it can be with the current design. The other option is an expensive one, which is to throw away the front suspension and replace with fully independent wishbone setup, but then it would probably no longer feel like a Morgan. I think Mulfab have this on offer for about £6k. There is one other thing you could try, as you know when driving on different types of road surface the feel of the steering changes, a great deal of this feel is highly impacted by the type of tyre and tread pattern. I have been told the fully asymmetric tyre patterns are not great on a Morgan. So it might be worth investigating some tyres. I currently have Bridgstone that are ok but are not great on rough Tarmac and I think this is due to the block pattern. I will probably move to Toyo Proxes Z1Rs next year. You can always call me if you want to have chat about this stuff.
