DC2R Coilovers Spring Rates Ratio F/R

[anzai]

hey guys i've been wanting to upgrade my spring rates for a while now and had a good read on sussy setups for dc2r for street and track

stock 98spec dc2r rates:

front - 4.5kg/mm
rear - 2.5-4.5 kg/mm (progressive)

i understand that when upgrading to coilovers with higher rate springs, it's best to keep the ratio similar between the front and rear rates to reduce unnecessary understeer or oversteer.

but as the rear springs are progressive, im not sure of what ratio to use.

most people in the states recommend a 50lb/in difference between the front and the rears, for example:

front - 500lb/in ~ 9 kg/mm
rear - 450lb/in ~ 8 kg/mm

is this a good ratio?

cheers

[senna]

The spring rates you run should be selected with a few things in consideration. Things like Tyre selection, swaybar size/setting, what bracing you run etc.. Even harder bushes (polyurethane) can effect how strong you need to go when you consider on road compliance.

The ratio between front and rear is generally higher on FF or RR vehicles since the weight distribution is very biased.