Max spring rate of gaz GHA coilovers (platform rear)

[Mash.]

Hello I'm looking at upping the rate of my springs on my gaz gha coilovers - standard rear platform.

Im looking at going for:
-450lb/78nm front
-500lb/90nm rear
is that about right for a standard rear platform being a 2:1 ratio or would i need a 250lb spring?

 

[ripp]

I have the same kit and it came with 275lbs front amd 250lbs rear, so you could start adding some percentage to these values. I would uprate the dampers also, give GAZ a call