Choosing coilover spring rates for your EVO
I don't remember anyone mentioning this (then again, it's been awhile since I've read all of these posts), but the spring rates that you choose for your COs may also vary depending on how you've moved the weight around in your Evo. In other words, if you've dropped a bunch of weight from the rear of the car, then you may gravitate more towards an even ratio, such as 8/k/8k, whereas if you've tried to balance the weight out on your car, you may want to gravitate more towards an 8k/10k or greater difference in spring rates.
l8r)
l8r)
I don't remember anyone mentioning this (then again, it's been awhile since I've read all of these posts), but the spring rates that you choose for your COs may also vary depending on how you've moved the weight around in your Evo. In other words, if you've dropped a bunch of weight from the rear of the car, then you may gravitate more towards an even ratio, such as 8/k/8k, whereas if you've tried to balance the weight out on your car, you may want to gravitate more towards an 8k/10k or greater difference in spring rates.
l8r)
l8r)
It's my understanding that corner balancing is only used to make sure that the car behaves the same when turning to the right or the left. If your spring rates are way off, then all corner balancing with do is to ensure that the handling sucks equally on both sides. Another example, if you were to run a disproportionately high rear spring rate, it would be roughly equivalent to running a big rear sway bar, which would probably lead to a more oversteer-prone Evo. Corner balancing would only ensure that the oversteer is equal on both sides.
l8r)
l8r)
it's my understanding that corner balancing is only used to make sure that the car behaves the same when turning to the right or the left. If your spring rates are way off, then all corner balancing with do is to ensure that the handling sucks equally on both sides. Another example, if you were to run a disproportionately high rear spring rate, it would be roughly equivalent to running a big rear sway bar, which would probably lead to a more oversteer-prone evo. Corner balancing would only ensure that the oversteer is equal on both sides.
L8r)
L8r)
So I flip flopped some springs around tonight. I'm now running 8k front 9k rear. On street tires even on the softest settings the difference is hardly noticeable. I would have expected more change going from an 11k rear to a 9k rear but there wasn't much.
I'm probably going to stick with the 9k-F 11k-R setup.
I'm probably going to stick with the 9k-F 11k-R setup.
Good thread. Now that I'm out of STU, I'm probably going to be running 285 R-comps next season. That means starting over with my suspension. Well, not completely. I'm currently on Ohlins DFVs 8kF/10kR and stock sways. I plan on doing the TRE max lock 1.0 rear diff and front LSD along with sending my coilovers to be revalved for 12k/16k. What springs would you guys recommend? I know the Ohlins come with Eibach springs. I'm wondering if someone could point me to exactly what they would get. Also, any recommendation of where to get the revalve done?
Ohlins NC won't do it. You'll have to do it at PSI. I've been around that block.
http://www.performanceshocks.com/
These are the only guys in the US that will do JDM spec Ohlins (Sportlines and DFVs fall under that). The guys there are very good. Flags are a completely different beast internally, more eurospec and can be done at most other Ohlins service centers.
If making the jump to R-comps from STU, might I suggest the following spring rates.
Fronts: 12K or 650lb/in
Rears: 14K or 750lb/in
That jump will definately require a revalve. Its slightly on the "softer" side (relatively speaking ofcourse) but you can always either add sway bars or the valving will allow +/- 2K change in spring rates if you decide to go stiffer. You'll need coilover springs with the following dimensions for the DFVs, 8" length 2.5" ID.
http://www.performanceshocks.com/
These are the only guys in the US that will do JDM spec Ohlins (Sportlines and DFVs fall under that). The guys there are very good. Flags are a completely different beast internally, more eurospec and can be done at most other Ohlins service centers.
If making the jump to R-comps from STU, might I suggest the following spring rates.
Fronts: 12K or 650lb/in
Rears: 14K or 750lb/in
That jump will definately require a revalve. Its slightly on the "softer" side (relatively speaking ofcourse) but you can always either add sway bars or the valving will allow +/- 2K change in spring rates if you decide to go stiffer. You'll need coilover springs with the following dimensions for the DFVs, 8" length 2.5" ID.
You're not serious are you Drew?!?
Ofcourse I've played it .... Check the leader board, I'm on there. I also noticed you've been playing it too. 
Btw I have to say this the best iteration yet. Load transfer, tire deflection, body roll, tire break away characteristics is very realistic.
Ofcourse I've played it .... Check the leader board, I'm on there. I also noticed you've been playing it too. 
Btw I have to say this the best iteration yet. Load transfer, tire deflection, body roll, tire break away characteristics is very realistic.
Last edited by DaWorstPlaya; Oct 2, 2009 at 03:00 PM.
I've been researching coilovers lately and im having trouble picking a set out. can i have some input on what you guys think please? ill be using my car as my daily driver, and will be used at the track rarely, but every once n awhile. my budget is around 2k or under, i searched for a thread like this but couldnt find one
the ones that ive been looking at are KW, H&R, Helix, and Hein.
thank you for the help
the ones that ive been looking at are KW, H&R, Helix, and Hein.
thank you for the help
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You're not serious are you Drew?!?
Ofcourse I've played it .... Check the leader board, I'm on there. I also noticed you've been playing it too. 
Btw I have to say this the best iteration yet. Load transfer, tire deflection, body roll, tire break away characteristics is very realistic.
Ofcourse I've played it .... Check the leader board, I'm on there. I also noticed you've been playing it too. 
Btw I have to say this the best iteration yet. Load transfer, tire deflection, body roll, tire break away characteristics is very realistic.
definitely feels very very good.

- Andrew





