Question about Spring rate

[window_lee]

I am look for coilover since I am tired of my lowering spring. they are just not hard enough. however, there are many different types of coilover in the market and they all have different spring rate. I am just wondering if a greater spring rate in the front will give u a better handle or the other way around.

plz give me some advices

[Loren]

Typical FWD car (Yaris) likes higher rear spring rates to help combat the problems inherent with front wheel drive.

I'm running nearly twice as much rate in the rear vs. the front. The balance is nice. The ride quality from running 7kg/mm springs in the rear is not nice.

[rob323]

I am look for coilover since I am tired of my lowering spring.
With what shocks?

they are just not hard enough. however, there are many different types of coilover in the market and they all have different spring rate. I am just wondering if a greater spring rate in the front will give u a better handle or the other way around.

plz give me some advices

My view is that there is not much point talking about spring rates with talking about shocks at the same time. A stiff spring on a comfort orientated shock will still probably not give you the response you are after.

In saying that, I have 175 pound fronts and 220 pound rears on my rally suspension, but I can adjust the dampening from soggy soft to bone jarring hard to suit the surface.

[ddongbap]

IDK what 220lbs translates to in KG, but you should always match the shock to the spring rate, and vise versa.

[rob323]

220 lbs per inch = 8.66 lbs per mm = 3.93kg/mm.

(so I'm running 3.1kg/mm fronts and 3.93kg/mm rears - stupid Aussie spring manufacturers still stuck in the dark ages :mad:).

Agreed, shock valving should be ideally matched with the spring.

[window_lee]

Thanks for the answer. I am using stock shocks with Tanabe lowering spring
I think i will get the coilover which can adjust the dampening

[rob323]

Just buy better shocks which are more suited to stiffer springs.