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-   -   Spring Rates (https://www.civicforums.com/forums/44-suspension-performance-modifications/89908-spring-rates.html)

robbclark1 04-25-2003 11:44 AM

Spring Rates
 
Is there a way to tell what the spring rates are on lowering springs/coilovers. Most manufacturers don't mention it on their site. I know JIC can have custom spring rates or even ones that you can change the spring rate yourself. Thanks.

Zzyzx 04-25-2003 12:19 PM

you can have them tested. Problem is, I dont know where. Many co's dont list spring rates because the average person who Purchases Sport/Lowering springs wouldn't know what do do with the Information. The more Reputible Racing suspension companys like H&R, Tein, Eibac, and Neuspeed to name a couple, would be more then happy to tell you the their spring rates, all you have to do is call them and ask.

Wanger 04-25-2003 01:04 PM

Tein S Tech spring rate:

front/back:
2.8/5.2

Zzyzx 04-25-2003 01:33 PM


Originally posted by Wanger
Tein S Tech spring rate:

front/back:
2.8/5.2


We under stand LBS/In her in America. Metric tends to confuse us.
:hgrin:

157lbs/in front and 291lbs/in on the back. not very stiff at all.

The SS springs are

336lbs/in front and 448 lbs/in back. More then twice as stiff on the front.

VNlilMAN 04-25-2003 10:00 PM

and its also hard to say with progressive springs since it varies... it gets stiffer n stiffer as it gets compressed more..

RedEU 04-01-2004 07:45 AM

so, the tein rate is linear or progressive?? & is the ss really doubling the stiffness??

Boilermaker1 04-01-2004 08:10 AM

Coilovers are linear racing springs, lowering springs are typically progressive.

Zzyzx 04-01-2004 09:23 AM

when Racing is involved Linear springs are better to have then Progressive ones. on the street, Progressive will give you a better ride when your just cruzin but still retain some level of performance when pushed.

robbclark1 04-01-2004 09:33 AM

That is why companies like eibach, progress, neuspeed, etc say it is x-x% stiffer than stock. They vary when they are compressed/extended.

Logan3024 04-01-2004 09:33 AM


Originally posted by Zzyzx
We under stand LBS/In her in America. Metric tends to confuse us.
:hgrin:

157lbs/in front and 291lbs/in on the back. not very stiff at all.

The SS springs are

336lbs/in front and 448 lbs/in back. More then twice as stiff on the front.

Conversion Chart. Should be useful for some people.


0 Kg/mm 0 Lb/In
1 Kg/mm 56 Lb/In
2 Kg/mm 111.9 Lb/In
3 Kg/mm 167.9 Lb/In
4 Kg/mm 223.8 Lb/In
5 Kg/mm 279.8 Lb/In
6 Kg/mm 335.7 Lb/In
7 Kg/mm 391.7 Lb/In
8 Kg/mm 447.6 Lb/In
9 Kg/mm 503.6 Lb/In
10 Kg/mm 559.5 Lb/In
11 Kg/mm 615.4 Lb/In
12 Kg/mm 671.4 Lb/In
13 Kg/mm 727.4 Lb/In
14 Kg/mm 783.4 Lb/In
15 Kg/mm 839.2 Lb/In
16 Kg/mm 895.2 Lb/In
17 Kg/mm 951.2 Lb/In
18 Kg/mm 1007.1 Lb/In
19 Kg/mm 1063.2 Lb/In
20 Kg/mm 1119 Lb/In

robbclark1 04-01-2004 09:49 AM

Boilermaker1 gave this awhile ago.

1 lb/in=.017854 kg/mm

Zzyzx 04-01-2004 10:20 AM

One of my friends estimated the rate of his springs by measuing the Diamiter of the coil, Simmilar to how you can calculate the rate of an anti-roll bar by knowing its thickness.

I'll ask him about it.

Zzyzx 04-01-2004 10:25 AM

Found a Coil spring rate Calculator...

Another (More Informative)

Unleaded 04-02-2004 02:59 AM

neuspeed race springs are 285/400. since they are performance minded springs, are they still progressive like the sports springs?

flotsamm 04-02-2004 08:56 AM

You can tell its a progressive spring if it has dead coils on it. Whereas a linear spring coils are evenly spaced for the most part.

robbclark1 04-02-2004 09:17 AM

most true coilovers are linear springs, most aftermarket springs are progressive. Sleeves are just aftermarket springs on an adjuster so they are usually progressive too. But flotsamm is right.


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