i can measure them all if ireally feel like but not gunna do it. perks to my dad owning a spring business

 

those are stock oem tc rates . Pedders are different but close just...different curve....shorter....

 

Thanks for the info!

 

Thanks..how do you explain those #s with the published rates here?
FRONT>>>27N/mm is 154 lb/in... linear
REAR>>>28-40N/mm is 160-228 Lb/in... progressive

2008 Chevrolet Cobalt SS Turbo 2.0 L Ecotec Turbocharged 260 hp | Prices, Reviews, Specifications

The MacPherson strut independent front suspension uses SS-specific gas-charged twin-tube struts; unique steering knuckles with optimized geometry; 27 N/mm linear coil springs with specific damper tuning; stiffer control arm handling and stabilizer bar bushings; and a direct-acting, 24-mm solid stabilizer bar. At the rear, the SS’s semi-trailing twist beam axle uses monotube gas-charged shocks with specific damper tuning, a 24-mm solid stabilizer bar, stiffer axle bushings and multi-rate coil springs (28-40 N/mm).

 

dunno who distro cars are...the "unique steering knuckles" is bs,like what is unique about them? same knuckle over 5 years just a little stronger and shorter steering arm, hardly unique...so... they says 27 n/m = 239 lbs inch.
but your quoted source says 27 N/mm or newton millimeters. so I am assuming its all bs crap....

 

Actually that info is from the original press release...
Here is another link same info

Officially Official: 2008 Chevy Cobalt SS Turbo with 260 HP bows at SEMA — Autoblog

Same identical wording N/mm..not N/M. Is this a typo then?

The MacPherson strut independent front suspension uses SS-specific gas-charged twin-tube struts; unique steering knuckles with optimized geometry; 27 N/mm linear coil springs with specific damper tuning; stiffer control arm handling and stabilizer bar bushings; and a direct-acting, 24-mm solid stabilizer bar. At the rear, the SS's semi-trailing twist beam axle uses monotube gas-charged shocks with specific damper tuning, a 24-mm solid stabilizer bar, stiffer axle bushings and multi-rate coil springs (28-40 N/mm). StabiliTrak electronic stability control and traction control are standard.



Edited new info:

Here an old post by YOU!
https://www.cobaltss.net/forums/4041388-post9.html

Front Spring
Main rate = 177 lb/in (31 N/mm)
Initial rate (installed) = 143 lb/in (25 N/mm)
Free length = 282mm
Rate transition length = 173mm
Installed length = 148mm @ 3500 N
Rear Spring
Main rate = 126 lb/in (22 N/mm)
Initial rate (installed) = 63 lb/in (11 N/mm)
Free length = 306mm
Rate transition length = 179mm
Installed length = 154mm @ 1950 N


EDITED: The above rates are Eibach Prokit rates..not stock TC

 

I thought the stock struts were monotube? I guess i was way off.

 

reading > you, that's describing the eibach pro-kit...

And since when was the press a reliable source of ANYTHING?

 

OK..I see that now...but Eibachs are at least as stiff as TC stock springs..NO? And these Eibach rates are much lower than what he just posted for TCs.
Also note that he uses N/mm here..not N/M. The question is are the stockers rated at 27
N/mm or N/M?

 

of course there is a difference between a newton meter and a newton millimeter. the metric system is easy.

all the drop springs afaik are softer than TC except for Pedders.

 

those have gotta be n/mm. a newton isnt much at all.

 

will is right I was quoting the eibach info. google for a conversion table. I am not sure what all this is leading to, I am out of it lol

 

before u head out... i have a question for u qwikredline... ill pm u

 

Just want to figure out if the press release is correct or not.
Here is an online converter.

Unit of Measure Converter
Just plug in 27 and below select n/mm (or n/m) in the pull down tab. Click *SUBMIT*. Then look at the equivalent values below...at Lbs/in.


Cobalt TC:
F: 27n/mm=154 lb/in Linear
R: 28-40n/mm= 160-238 lb/in Prog




From Press release on HHR..same units of measure..n/mm. Values are slightly different all around though.

F: 28 N/mm=160 lb/in LINEAR
R: 30/N/mm-40Nmm= 171 lb/in-238 lb/in Prog



The MacPherson strut independent front suspension uses SS-specific gas-charged twin-tube struts, unique steering knuckles with optimized geometry, 28 N/mm linear coil springs with specific damper tuning, stiffer control arm handling and stabilizer bar bushings, and a direct-acting, 23-mm solid stabilizer bar. At the rear, the SS’s semi-trailing twist beam axle uses monotube gas-charged shocks with specific damper tuning, a 24-mm solid stabilizer bar, stiffer axle bushings and multi-rate coil springs (30-40 N/mm). StabiliTrak electronic stability control and traction control are standard

So, it seems like n/mm value is consistent with both reports. Again, are these reports from the press releases incorrect? Why would they be?

 

cant answer those press release questions. Can say the front springs are not linear as I measure them...but for sure 154 lb inches is pretty soft and not what I measured.

 

OK..thanks for all the useful info. you have provided.

 

what the fck happened to my thread

 

exactly what always happens here.

 

Same thing that happens to mine...
MORPHED!!!

 

Ya, get all this tech **** out of here! this is about making cobalts pretty!

the car really does look great, Dom. Still needs more tire though. lol

 

thanks man, i know, but this is how itll fit. so the wheel is making contact with my strut so i curbed the inside of my wheel bahahaha
i ordered 5mm spacers for hte front lol

 

the answer to your question OP is select the rate you wish, based on the information here. Measure the length of your existing spring. Measure the inside diameter of your existing spring. Lets say you decide that 325 lbs linear is what you want. Lets suggest they are a 6 inch long x 2.25 i.d spring. Go to the Hypercoil web site and order your springs they will cost you about 75 dollars each . NP.

ur welcome.

 

wait, so you hit a bump so hard the wheel hit the strut and damaged it, kinda confused?? this stance thing is slowly killing your car

18x 9.5 right? I'm assuming around a +30-35 offset?

 

18x9.5 +30

And the wheel is so wide, it's hitting the coilover strut.