spring rates, which is good for sport use? Options

[tufy]

before i ask my question i want to explain what spiring rate is..
Spring Rate is the amount of weight needed to compress a spring a certain . Springs are rated in LB/in (in metric system kg/mm), or specifically, how many pounds of weight are required to depress the spring by one inch.
Springs that have a low Spring Rate are soft, while springs that have a high Spring Rate are stiffer.
Question is, what spring rates does every one with coilover kit have. and are you happy? what is optimum spring rate for sport use. 10 kg/mm front and 8 kg/mm rear seem ok to me. wht do you think guys.?

This post has been edited by tufy: Apr 28, 2007 - 4:29 AM

[purplegt4]

mine are 7 kg/mm front and 5 kg/mm rear these rates suffice for spirited driving on the street. but i would prefer a lil bit harder for the track.

for example:

trd made their coilover specs for fwd
8-F
6-R

Since your car is awd i believe you would have to look at the spring rates of kits made for awd applications. Some rates are the same and some rates are different when comparing front and rear.

[Kwanza26]

mine are 7 kg/mm front and 5 kg/mm rear these rates suffice for spirited driving on the street. but i would prefer a lil bit harder for the track.

That sounds AWFULLY stiff... what springs are you running? Assuming you are running 7/5k springs F/R... the springs themselves are plenty stiff. What you probably need... are stiffer shocks. I don't know why you'd want to run a set-up like that on the street... I wouldn't. When I used to race... I ran between 8-10K rears and 6-7k fronts cause i liked more agressive corner entries.

Tufy... coilover springs rates are almost always hard because they're designed to adjust. The dampening is done primarily with the shock... so range of adjustment on the shocks are much more important in terms of driving performance. I'm not very experienced with AWD cars... but it depends entirely on how you want the suspension to feel and react in certain situations. Generally speaking with front engine cars... stiffer rear = more oversteer. Sriffer fronts mean more understeer. You want to find the balance of that for your particular tastes and feel.

[playr158]

He's running Tein coilovers

[malpaso]

tanabe using spring rate 3.5/3.0 kg/mm as almost sport use one...



...stock are about 2.9/2.3 kg/mm -> 10/8 is 3x more than stock... so IMHO those are for pure circuit only (too hard for sport/street use). So I would agree more with lower numbers for pure sport (7/5)

[tufy]

thanks for the info guys.
i think 7kg/5kg is ok