rear suspension /wheels

[Guest]

Koy.
If it was me, I would clean up the factory ones and put them back. They seem to be better made than some of today's replacements.

I'm afraid this is complete nonsense.
Old springs are invariably worn out, and go soft, it's part of the metal fatiguing process.

The only thing that changes is the way springs are made, cold coil v hot coil, and the type of heat treatment used to get the appropriate hardness and rating for a given wire diameter.
Let's not forget, modern tyres on wider rims give suspension a lot harder time, xompared with the ancient 60s tall tyres on narrow rims.
The interesting thing about making high performance suspension is the need for proper rate springs - right in the performance window, with proper (NON NEEDLE VALVE) type dampers.

When you see people all fitting this Spax, Avo, Gazzo damper crap then poly bushes then you can understand the credibility of criticism of suspension components is on the very thin end of a wedge.

My TR5 rear progressive rate rear springs were actually initially right down at the lowest factory soft setting, but in bends the corner spring rate rises so fast up to triple the rate, - so transparently you simply can't tell it's happening.

The result is astonishing ride comfort combined with Koni dampers, but then quite amazing cornering stability and cornering forces under load.
The Stag is just a larger version of the same thing, but with much better rear geometry thanks to not having the stupid TR shaped trailing arms, causing all that nasty toe-in/toe-out geometrical mess on turn in.

Stick a salisbury LSD in the back of a Stag, with some decent dampers & springs & you start to have quite a fun machine.