Topic: Koni Z0K Suspension Testing and Install Process

[kennysabarese]

U, yes you can go too stiff: Read this

http://farnorthracing.com/autocross_secrets5.html

[kennysabarese]

I am used to race cars and prefer double the spring rate even on the street.

If you think springs in the 200 and something range are stiff, you';d hate the 950 lb. springs I run on one of the race cars....(totally different chassis and appropriate for that use on that chassis).

BTW, congratulations on setting the shocks conservatively. I have seen SO many people get new shocks and set them far too hard right off the bat!

Nothing I said indicated I thought my springs are stiff or not or too stiff or that I was cooler than someone for having the stiffest shocks. I was just saying that I feel that GM didn't tune the car for comfort.

Thank you for the compliment about my shock settings. I haven't even played with them yet, gotta get on a skidpad.

[elff]

What is the first number in the following stats mean?

LNF ZOK
Front (3100N - 37.0 N/mm)
Rear (3200N - 50.0 N/mm)

GM SPO Perf Parts
Front (3450N - 37.0 N/mm)
Rear (3350N - 50.0 N/mm)

[Sol Asylum]

What is the first number in the following stats mean?

LNF ZOK
Front (3100N - 37.0 N/mm)
Rear (3200N - 50.0 N/mm)

GM SPO Perf Parts
Front (3450N - 37.0 N/mm)
Rear (3350N - 50.0 N/mm)

Just a guess on my part but I would say it's the total force the spring can take before coil binding or damage happens.

[elff]

I found my answer on the bb. 

Quick question:  On the spring specs, I kind of figure the N/mm is Newtons per millimeter, since I'm used to seeing spring rates in pounds per inch, plus converting Newtons per millimeter to pounds per inch works out to 211 pounds per inch in the case of the LNF Z0K front spring.  But what is the first number?  For example, for the LNF Z0K solstice, the front spring is listed at (3100N - 37.0 N/mm).  The GMPP front spring is listed at (3450N - 37 N/mm).

I'm guessing that the 3450N is the force needed to compress the GMPP spring to the check height of 211.5 mm?  And that since the load for the GMPP springs at check height is in the middle of the FE3 and Z0K spring loads, the car will sit somewhat lower than stock but higher than the Z0K?

3800 - 3450 = 350N

350 N/37N/mm = 9.46mm = .37 inches, or about 3/8ths of an inch lower than stock, right?