Woody928 wrote:The car is used as a toy, albeit that it is my only car, I have only covered around 4000 miles or so in the last year (likely the same annual mileage going forward)....The car is used as a fast road car, doing some long distance trips and very occasional track use.
What are my options? How do they compare? What do they cost? Whats the difference between getting Coilovers or Shocks and lowering springs bearing in mind the cars use?
The use of lowering springs on a shock which was not designed to use them in the first place inevitably means you are compromising the latter's performance. The piston stroke is restricted below it's designed operating range which, without changes to the valving, means impaired operation. You are very likely to hit the bump stops on poorly surfaced roads. My original red Rev 3 tubby had had -40mm springs (make unknown) fitted to the stock black Bilsteins by the previous owner. The result in short order was totally knackered shocks. The ride comfort was appalling and the car skittered on bumpy B roads. I got shot of them and replaced them with BC coilovers which are now on my Rev 4.
T2 is/has always been set up specifically for the purposes you mention above. The KW Variant 3s which had been fitted around 9 years ago were showing their age and one suffered a fractured spring last autumn when I failed to avoid a horrendous pothole on the apex of a bend. KWs are an excellent product (they should be at £1350 a set!) but that was a bit steep for my blood so I replaced them with BCs. The KWs are designed to be used with the stock top mounts, so are not camber adjustable unless you buy separate pillowball ones which will put a further dent in the budget!
The big advantage with coilovers - BCs or HSDs - is that you get adjustable front top mounts included in the price, plus the design means the spring length stays constant irrespective of the ride height. The latter is easily changed should you desire it.
HM had problems with his BCs. I don't know the cause nor can I speculate on what it might be. All I can say is that AFAIK shinny and I were the earliest users of them on here (over 5 years ago - well before HM) and mine have performed faultlessly on two different cars in that time.
If you don't want to go down that route, you could use yellow B6 Bilsteins (non rebuildable) or Koni/Spax struts (which are, with new inserts) but the point about lowering springs is still valid re non-rebuildable shocks. With inserts you should be able to get ones which have been designed for use with shorter than stock springs.
The mistake that so many people make is failing to understand that a car's suspension should be treated as a single dynamic unit: the component parts must all work in harmony. Mess with just one in isolation and you risk upsetting the overall balance.