TwinTurbo.NET: Nissan 300ZX forum - Yes they are...
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Subject Yes they are...
     
Posted by Gordo 93TT Daytona on September 17, 2010 at 9:45 PM
  This message has been viewed 142 times.
     
In Reply To Arent coilovers even stiffer than OEM/ Eibachs? (n/m) posted by ZXoltan on September 17, 2010 at 03:33 PM
     
Message Most coilover spring rates are in the range of 6-8 Kg/mm or 335 lbs/in to 450 lbs/in.

OEM Spring Rates are:

TT Front: 168 lbs/in or 3.0 Kg/mm
TT Rear: 134 lbs/in or 2.4 Kg/mm

Eibach Spring Rates (Progressive Rates) as quoted by an Eibach tech rep

TT Front: 182 lbs/in upto 251 lbs/in (3.3 Kg/mm to 4.5 Kg/mm)
TT Rear: 142 lbs/in upto 199 lbs/in (2.5 Kg/mm to 4.6 Kg/mm)

Here is a handy conversion calculator:

Spring rate conversion: lbs/inch to Kg/mm

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