Spring Rate Chart
Thread Starter
Evolving Member
Joined: Sep 2003
Posts: 124
Likes: 1
From: Modesto.Ca
Spring Rate Chart
Here is a list of the spring rate's for the Evo 8. If you know of any more, or if you have a corraction, let me know and I will change it.
Thanks.
** = progressive rate
***How to read the Swift rates: Softer rate is the collapsible side (like a helper spring). The higher number is the main spring rate. The total spring rate on the vehicle is 109lb/inch (front)* / 129lb/in (rear)* before the progressive end is fully collapsed. Fully collapsing the lower spring rate. Therefore, the riding rate on the Swifts is the maximum rate given.
*F: (Spring Rate A * Spring Rate B) / (Spring Rate A + Spring Rate B) -- (157*358)/(157+358) = 109lb/in.
*R: (Spring Rate A * Spring Rate B) / (Spring Rate A + Spring Rate B) -- (196*380)/(196+380) = 129lb/in.
***** MR differences: Rear MR springs are 3-4mm higher than the GSR versions. Reason is for the increase pressure the Bilsteins have.
NOTE: Swift SpecRs are now black.
This information is direct from Swift USA.
Edit: Edited Tein Flex adjustable as per info from chmodlf
Thanks.
| Evo Spring Rates | |||
| Lowering Springs | |||
| Name | Front | Rear | Drop |
| Eibach Pro-Kit** | 165lbs(2.9k) | 140lbs(2.5k) | 1.2f / 1.2r |
| Espelir ASD | 263lbs(4.7k) | 319lbs(5.7k) | 0.79f / .79r |
| Espelir GT | 308lbs(5.5k) | 330lbs(5.9k) | 1.7f/ .98r |
| Ralliart | 280lbs(5.0k) | 307lbs(5.5k) | 0.5f / 0.5r |
| RSR** | 224lbs(4.0k) | 280lbs(5.0k) | 1.4f / 1.4r |
| RSR Ti2000 | 280lbs(5.0k) | 336lbs(6.0k) | 1.4f / 0.8r |
| Tanabe GP210: | 256lbs(4.6k) | 319lbs(5.7k) | 1.5f / 1.0r |
| Tein High Tech** | 196lbs(3.5k) | 268lbs(4.8k | 1.4f / 0.3r |
| Tein S Tech** | 212lbs(3.8k) | 291lbs(5.1k) | 2.0f / 0.9r |
Originally Posted by SmikeEvo
| Stock | F: 180 | R: 225. 0 Drop. |
| Swift Sports | F: 179 (helper section) 269 (main rate) | R: 207 (helper section) 319 (main rate) (157-314 for MR) |
| Swift Sports MR | F: 179 (helper section) 269 (main rate) | R: 157 (helper section) 314 (main rate) |
| Swift Spec Rs | F: 157 (helper section) 358 (main rate) | R: 196 (helper section) 380 (main rate) |
| Swift Spec Rs MR | F: 157 (helper section) 358 (main rate) | R: 153 (helper section) 380 (main rate) |
| GTWorx (near linear) | F: 290 | R: 330 |
***How to read the Swift rates: Softer rate is the collapsible side (like a helper spring). The higher number is the main spring rate. The total spring rate on the vehicle is 109lb/inch (front)* / 129lb/in (rear)* before the progressive end is fully collapsed. Fully collapsing the lower spring rate. Therefore, the riding rate on the Swifts is the maximum rate given.
*F: (Spring Rate A * Spring Rate B) / (Spring Rate A + Spring Rate B) -- (157*358)/(157+358) = 109lb/in.
*R: (Spring Rate A * Spring Rate B) / (Spring Rate A + Spring Rate B) -- (196*380)/(196+380) = 129lb/in.
***** MR differences: Rear MR springs are 3-4mm higher than the GSR versions. Reason is for the increase pressure the Bilsteins have.
NOTE: Swift SpecRs are now black.
This information is direct from Swift USA.
| Coilovers | |||
| Brand | Front | Rear | Adjustable? |
| APEXI PRO | 560lbs(10.K) | 560lbs(10.K) | Adjustable |
| CUSCO Zero 1 | 392lbs(7.0K) | 280lbs(5.0k) | Adjustable |
| CUSCO Zero 2 | 392lbs(7.0K) | 280lbs(5.0k) | Adjustable |
| CUSCO Zero 2R | 392lbs(7.0K) | 280lbs(5.0k) | Adjustable |
| HKS Hypermax II | 392lbs(7.0k) | 336lbs(6.0K) | Adjustable |
| HKS Hypermax RS | 336lbs(6.0K) | 280lbs(5.0k) | Adjustable |
| HKS Kansai Tarmac | 448lbs(8.0K) | 448lbs(8.0K) | Adjustable |
| HKS Kansai Track | 896lbs(16.K) | 784lbs(14.K) | Adjustable |
| HKS Performer | 392lbs(7.0k) | 336lbs(6.0k) | Adjustable |
| HKS PRO | 672lbs(12.K) | 672lbs(12.K) | Adjustable |
| JIC FLT A2 | 560lbs(10.K) | 504lbs(9.0K) | Adjustable |
| OHLINS FLAG L | Any | Any | Adjustable |
| OHLINS R/T | 448lbs(8k) | 560lbs(10k) | Adjustable |
| Ralliart | 336lbs(6.0K) | 336lbs(6.0K) | Adjustable |
| Tein Basic | 392lbs(7.0k) | 336lbs(6.0K) | Adjustable |
| Tein Flex | 672lbs(12.K) | 560lbs(10.K) | Adjustable (Corrected 6/6/06) |
| Tein SS | 392lbs(7.0k) | 336lbs(6.0k) | Adjustable |
| Tein RA | 672lbs(12.K) | 504lbs(9,0K) | Adjustable |
| Tein HA | 504lbs(9.0K) | 392lbs(7.0K) | Adjustable |
| Tein HT | 896lbs(16.K) | 672lbs(12.K) | Adjustable |
| ZEAL | 336lbs(6.0K) | 280lbs(5.0k) | Adjustable |
| ZEAL Also | 448lbs(8.0k) | 392lbs(7.0k) | Adjustable |
Edit: Edited Tein Flex adjustable as per info from chmodlf
I was looking through the spring rate chart for various vendors, and thought this might be useful.
1lb = 0.45359237kg
1in = 25.4mm
.45359237 / 25.4 = .017857967322834645669291338582677
So now we know that 1lb/in = .017857967322834645669291338582677.
So if we want a spring that's roughly 560lbs; we'd multiply both sides by 560, and come up with roughly a 10k spring rate. Alternatively if you already know the kg/mm rate and want to find out what the lbs/in is, just divide the spring rate by that reaaally long factoral above (the .0178...).
But just in case you all didn't want to go through all that, here's a chart:
1lb = 0.45359237kg
1in = 25.4mm
.45359237 / 25.4 = .017857967322834645669291338582677
So now we know that 1lb/in = .017857967322834645669291338582677.
So if we want a spring that's roughly 560lbs; we'd multiply both sides by 560, and come up with roughly a 10k spring rate. Alternatively if you already know the kg/mm rate and want to find out what the lbs/in is, just divide the spring rate by that reaaally long factoral above (the .0178...).
But just in case you all didn't want to go through all that, here's a chart:
| kg/mm to lbs/in |
| 16 = 896 |
| 15 = 840 |
| 14 = 784 |
| 13 = 728 |
| 12 = 672 |
| 11 = 616 |
| 10 = 560 |
| 9.0 = 504 |
| 8.5 = 476 |
| 8.0 = 448 |
| 7.5 = 420 |
| 7.0 = 392 |
| 6.5 = 364 |
| 6.0 = 336 |
| 5.5 = 308 |
| 5.0 = 280 |
| 4.5 = 252 |
| 4.0 = 224 |
| 3.0 = 168 |
| 2.0 = 112 |
Last edited by golgo13; Oct 13, 2014 at 04:14 PM.
Is that the right spring rate for the stock springs? If so why are the Eibach springs so soft, I was looking into getting a set. I like the fact they only have a 1" drop all around.
Hopefully you got the data from the manufacturers and not from message boards.
RS-R has different figures. http://www.rs-r.com/suspension_springs.htm
I'd also take rates for progressive spring with a grain of salt, since they're not static like linear springs.
RS-R has different figures. http://www.rs-r.com/suspension_springs.htm
I'd also take rates for progressive spring with a grain of salt, since they're not static like linear springs.
Thread Starter
Evolving Member
Joined: Sep 2003
Posts: 124
Likes: 1
From: Modesto.Ca
nOOdle,
Thanks for the web site. I when looking for it and never found it. The chart has been updated.
Keep them coming!! From what I hear and found, The Eibach Pro-Kit are soft.
Thanks for the web site. I when looking for it and never found it. The chart has been updated.
Keep them coming!! From what I hear and found, The Eibach Pro-Kit are soft.
Last edited by Tri-Bar; Feb 22, 2004 at 05:53 PM.
Newbie
Joined: Feb 2004
Posts: 12
Likes: 0
From: San Deigo CA
What are the Evo's stock spring rates?
Is there really that much to be desired with the suspension, that it needs to be modified significantly?
Is there any one company that shines at suspension systems for these cars?
My appologies for being a n00b.
Is there really that much to be desired with the suspension, that it needs to be modified significantly?
Is there any one company that shines at suspension systems for these cars?
My appologies for being a n00b.
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Thread Starter
Evolving Member
Joined: Sep 2003
Posts: 124
Likes: 1
From: Modesto.Ca
Originally posted by Audi Shep
What are the Evo's stock spring rates?
Is there really that much to be desired with the suspension, that it needs to be modified significantly?
Is there any one company that shines at suspension systems for these cars?
My appologies for being a n00b.
What are the Evo's stock spring rates?
Is there really that much to be desired with the suspension, that it needs to be modified significantly?
Is there any one company that shines at suspension systems for these cars?
My appologies for being a n00b.
Originally posted by Evo Ate
Is that the right spring rate for the stock springs? If so why are the Eibach springs so soft, I was looking into getting a set. I like the fact they only have a 1" drop all around.
Is that the right spring rate for the stock springs? If so why are the Eibach springs so soft, I was looking into getting a set. I like the fact they only have a 1" drop all around.
