has anyone used (or is using) these springs on their coupe?
buddy has a set for sale and debating whether to use them or not...i have an 05 coupe 6mt (sport suspension).

 

no one?

 

Kg/mm stands for kilograms per millimeter a metric unit of measurement.
It needs a number in front of this term to make any sense.
Not sure what you are alluding to, do you think this is a brand name?

 

it IS a brand name...surprised you didn't know.
KG/mm spring link

 

He doesn't follow brands or what's avaliable for the platform, totally understandable since his area of expertise relates to owning or working in a shop, he's schooled as a SAE engineer IIRC.

 

Btw,

Kg/mm springs 350Z
DR21 super sport 15mm drop
Spring rates in lbs initial/final front 246/398 initial/final rear 252/409

Pretty wide spread between initial and final spring rates. Looking at peak front rates, I'd look out for dampning issues in the front.

 

Well at least they didn't chose POUND/INCH, sure must sound weird to the rest of the world which uses metric............one of those brand names chosen to appeal to the American Masses without any technical training.

"Pretty wide spread between initial and final spring rates" corrected for offset motion ratio [divide by ~ 2] they appear about equal to what rear Eibach's run.

 

what do the initial/final spring rates mean? does this mean as the springs settle down it'll be closer to the 398(f) 409(r) rates?