Spring rate

[valvolin]

Anyone knows eibach or H&R spring rate?

Are they stiffer than EK9 stock spring?

 

[blinx9900]

eibach makes 2 different springs for 96-00 civic, H&R makes 3, which ones are you referring to?

for refrence stock ek9 springs are 250lbs front and rear.

 

[ManosEK9]

lol whenever I see "spring rate" I remember my failure in Physics when I missed a similar question and got an F!

 

[blinx9900]

perhaps its worth mentioning that the front is a linear 250lbs while the rear is a progressive 250lb...

 

[valvolin]

lol whenever I see "spring rate" I remember my failure in Physics when I missed a similar question and got an F!

Ok i could give you a private lesson. I'm aeronautic engineer

Wait...

I researched ek9 spring rate and i found it in spoon's internet site:
Stock ek9
Front 4.3kg/mm ( near 250lbs/in )
Rear 4.2kg/mm ( near 240lbs/in )

Stock ek4
Front 3.6kg/mm ( near 210lbs/in )
Rear 3.2kg/mm ( near 186lbs/in )

Spoon spring
Front 6.3kg/mm ( near 366lbs/in )
Rear 5.4kg/mm ( near 314lbs/in )

exact name: eibach pro-kit and H&R sport spring
I can't drop over 1-1.5 inch
I know only that H&R sport springs are 20% stiffer than stock...