JZA80 Suspension:
Spring Type Front lbf/in Rear lbf/in % stiffer than Stock Front % stiffer than Stock Rear Height Drop Front Height Drop Rear AVG. Price
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Stock linear 430 219
Eibach proggressive 370->510 180->263 18.6 20.1 1.2 1 $220
H&R progressive / linear 470->495 250 15.1 15.2 1.1 1 $240
Greddy* ? springs 509.6 240.8 18.5 10.0 ? ?
Intrax progressive (see new notes below) 559 285 30.0 30.1 1.5 1.3 $247
HKS  ? springs 573 254 33.3 16.0 1.4 0.2
HKS 10-way* coilover 661 386 53.7 76.3 NA NA
HKS 20-way* coilover 661 386 53.7 76.3 NA NA
Blitz coilover (sachs damper options) 685 571 59.3 160.7 NA NA
HKS Hiper Max II coilover 772 441 79.5 101.4 NA NA
HKS30-way coilover 772 441 79.5 101.4 NA NA
HKS Drag coilover 772 220 79.5 0.5 NA NA
Tein coilover 780 450 81.4 105.5 NA NA
Tanabe coilover 784 672 82.3 206.8 NA NA
Intrax coilover ? ? NA NA
Ground Control coilover 950 600 120.9 174.0 NA NA
H&R coilover ? ?
* = discontinued
Original spreadsheet credits: Kent Rafferty / Andi Baritchi
Some data courtesy of Dusty Womack  www.mvpmotorsports.com
Last revision & additions -2/02-  Derek Steffey    pacnw.supras.org
Intrax spring data - 2/11/02 -  Intrax says front spring is linear @ 350lbf/in and rear is progressive from 152->285
Intrax R Heigth (mm) Intrax R Loading (N) (off vehicle) 1N/mm = 5.7 lbf/in
300 0 0
260 1000 21.96153846
200 2600 74.23
180 3250 103.0972222
140 4750 193.7321429
120 5750 273.6041667
(-note:  This data seems suspect, though Intrax Claims it is correct for currently shipping springs for MKIV Turbo models.)