Dallas J

iTrader: (1)

Just to add to MRFreds response, it might be easier to think of it as wheel rate. So yes, the front wheel rate will need to be higher compared to the rear because the 60/40 (or whatever it is) weight distribution.

Wheel rate is simply spring rate * ( motion ratio squared). Assuming the Front MR is ~0.91 and rear is 0.73 (an average along the arc, my measurements), then here's the wheel rates.

If you ran 12k/10k - front = 9.9, rear = 5.3.

Switching to 10k/12k - front = 8.3, rear = 6.4

Natural frequencies are a way to understand the balance of the spring to mass ratio and also compare against other cars, but to simply look at the ratio of balance f/r you can see the 10k/12k is closer to a balanced car in regards to stiffness with a little extra bias towards rear stiffness.

DagYo369

iTrader: (4)

ahhh whabaki. makes sense now. I've made quite a few changes suspension wise to the car now and haven't been able to drive it yet but im going to try it first with the 12k fornt and 10k rear just to get a feel for it then swap them around just so i can get a better act/feeling of the car cause who knows how its gonna feel with all the changes now and i hate to change to much at once! thanks for the info though for sure gonna be swapping them around at some point!

Evo Goblin

iTrader: (1)

..So does this only count for drop in springs and not complete coilover setups?

Because every after marked coilover set has either matching spring rates front to back or higher spring rates in front.

But all the after market spring only replacements have a higher rate in the rear.

bone100

That's probably due to the fact that the stock dampeners are valved for a stiffer rear where as a full coilover comes with different valving all together.

mchuang

iTrader: (11)

Can the specs for the Tanabe springs be updated. On MAP's website it shows the specs as follows.

Application: Mitsubishi Lancer EVO8
Note: 1.5" F / 0.6" R

MrJuls

What are your opinions on the HKS Hypermax II for street use? I will also track the car from time to time.It's not my DD.

NorCal Lancer

iTrader: (1)

spring rate for tein type flex coilovers? I'm not sure if the list is outdated, but from what I found it was this
Tein Flex:.................504lbs(9.0K).....448lbs(8.0K )....Adjustable

but then I found this, "i've called tein and they said the spring rates for tein flex is 12kg/10kg."

NorCal Lancer

iTrader: (1)

Actually i need the spring preload for the tein type flex, thank you

mrfred

iTrader: (50)

Smike,

I think that there may be a small error in the Swift spring description in the Spring Rate Chart thread. In the thread, you have, "MR differences: Rear MR springs are 3-4mm higher than the GSR versions. Reason is for the increase pressure the Bilsteins have."

If the Bilsteins have higher gas pressure and the goal was to have the same drop with KYB and MR Bilstein Evos, then it would make more sense if the MR springs where 3-4 mm shorter rather than higher.

Cheers, ...

vgm10

iTrader: (1)

This info is really useful for suspension tuning/selection, thanks to all for posting your info.

Sil'vr-Boi6

iTrader: (26)

anybody have spring rates for Racecomps?

pangyau

Hi guys,

Need your assistance & information.
What is the stock spring rates of OHLIN DFV (new from box)?

Anybody able to guide where to get Installation Manual for CT9A

Thanks in advance

Found the answer from Dealer. Front 10kg/ Rear 8kg.

joeymass93

anyone use the tanabe gp2100? currently looking for springs and wanted to know if anybody has any input on em?

MinusPrevious

iTrader: (3)

Stick w/the proven springs noted on the forum. Swift / Eibach / GTWorx

heel2toe

iTrader: (41)

^Fixed