Spring Rate

[Nic Webb <nic@webb.demon.co.uk>]

A Question for you.

It has finally got to the time of year,warmer, for me to start working
on my fastback. The two main tasks for this year are firstly add a fully
mapped ignition and fuel injection system, which is currently happening
slowly, and the second, which is where I need advice, is to remove the
rear torsion bars infavour of race spec coil over dampers, and replace
the spring plates with  adjustable rods, with a sphereical bearing in
place of the big rubber donut bushes. My Question is thus, Does anyone
know the spring rate of the standard torsion springs to give me a rough
starting point for tuning the suspension.
Hopefully the suspension changes should save weight and enable tuning of
the geometry and ride height to be simplified.

All this has to be done for the first race at the end fo April.

Thanks
Nic Webb
71 Fastback
Team Roobarb & Custard.