I was playing around with some '88 springs, a press, a tape measure, and a bathroom scale. Here's what I came up with.
'88 Front spring ARD: 171 lb/in
'88 Rear spring PUC: 122 lb/in
I had these two springs measured at a race shop a couple years ago and was told 175 and 100 respectively.
To check the accuracy of my method I measured a couple Eibach 250 lb x 8" springs I had lying around. Both measured 237 lb/in which is 5% different from my measurement Based on this, it looks like my measurements of the Fiero springs are at least close.
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Doug Chase
Chase Race
Custom roll cage fabrication available
Custom exhaust fabrication available
'87 Fiero SE V6 5-spd for sale $2200