Installed the Koni Sport Kit

Well, since rear springs on the focus ususally have higher spring rates then their front end counter-parts, you can run your adjustable dampers a little more firm in the rear to have equal rebound F&R.

Click to expand...

Exactly.
Generally soft all around, but if anything is firmer than the other end, it should be the rear.

I think he means the New Koni Sport Kit; springs and dampers...

Guess we'll find out so0n enuff.

whats the spring rates on these?

Click to expand...

I asked this a while ago and nobody seems to know. Perhaps someone should call Koni to try and find out.

Click to expand...

i just did they say they wont publish their spring rate.


personaly i like to know what i get thats why i wont buy it until i know the springs rates.

They CAN be figured out, but I forget how.
I think you have to take several measurements, and measuring calipers are required to figure the thickness of the coils IIRC.
Ask P-51, I'm sure he knows how to figure them out within a reasonable estimate.

Here's a quick & dirty way to do an estimate... This works best if you've got a home universal gym machine, but any set of bar-bell weights will do.

Set the spring vertically on a hard surface (like concrete) you will probably need to shim one side of the spring so it sits flat.

Measure hight of spring.

Apply weight to spring. Any amount of weight will do as long as you know exactly how much weight is applied, but it's best if you can get the spring to compress at least an inch- so you'll probably need 2-300 lbs.

Measure the new height of the spring & subtract from old height to get the difference.

Now you know lbs/measured distance. a little bit of fractional math will get you lbs/inch.

*Note: This works on constant-rate springs. Progressive springs would require several measurements with various amounts of weight to get a linear graph of spring rate.

Unless you know the specific grade of steel used & the method of manufacture, as well as some very complex enginering formulas, knowing the guage / thickness of the spring coils won't do you much good.

hows the drop? im debating on getting the kit for about 700 shipped at new edge or going to tire rack for just the struts for 620.. i already have tein stech springs so it would be cheaper to go w/ just the struts. But i dont want to lose the drop and i know .5 inches isnt that much, but it makes a difference .

So when u get ur pics can u show the height of it? and what tire size u got so i can figure it out. thanks