OK, dumb question here, But I assume you are talking just rear springs here?
If I fit uprated springs on the front then I may as well fit shocks there as well as it will all have to come off?
So how would the car feel with springs changed on the rear and shocks and springs on the front?
in my experience, pretty good. I usually find that front springs can be a little harder than standard and all fous dampers need to be a little harder, but on rwd saloons, the rear springs benefit from being just as soft as you can make them - it helps you to find traction just beyond the turn-in point and to be able to adjust the car's attitude thereafter.
Keeping the orignal ride height on cars with rear semi-trailing arm rear susension is critical, as this design suffers from a large difference in rear roll centre height with altered semi-trailing arm to road angle - that's part of the reason for the camber-correction bar.
For what it's worth, I'm considering putting the softer springs on the Holden for that reason.
New dampers are always a good idea.
anyone know what the actual spring rates are ?