Somewhere previously in this forum there has been a thread which dealt with spring rates to suit an R12 sprint/autokhana/hillclimb/track car and I recall rates of 200 lbs being recommended for front and rear.
Currently I run 17 Gordini sway bars with cut down 17G springs in the front and lowered K-Mac wagon springs in the rear. The car sits at a nice height with lower wishbones being virtually horizontal at rest. However, the suspension is still too soft.
My attempts to get stiffer springs made here in Perth are hampered by lack of data and specifications. There is enthusiasm to make something to match a 'sample', but that's what I can't provide.
Has anyone successfully bought/ordered comp springs 'over the counter' from someone they could recommend? The perils of distance ....