In my own search to find a new set of springs, I found that there isn't a whole lot of info readily available comparing similar springs giving all specs. I took to gathering what I could via websites and customer support. One thing I do need to state concerning spring rates, is that there's no standard for measuring spring rates, so you can't simply compare one spring to another by rate because there are too many factors (equipment and ride height being the biggest two). That being said, here's what I could find (info based on 4th gen springs)

Eibach Pro Kit
Linear front, progressive rear, 239F/128-225R, 1.2/1.0 drop

Eibach Sportline
Linear front, progressive rear, 239F/94-225R, 1.7/1.5 drop

H&R Sport
Progressive all, rate unavailable, 1.3/1.3 drop

H&R Race
Progressive all, 400F/345R, 1.9/1.6 drop

Tein H Tech
Linear all, 218F/184R, 0.6/0.7 drop

Tein S Tech
Linear all, 224F/207R, 1.1/1.2 drop

Neuspeed Sport
Linear all, 240F/225R, 1.75/1.5 drop

Neuspeed Race
Linear all, 400F/345R, 2.25/2.0 drop

Sprint
Progressive all, 25% stiffer than stock, 2.25/2.25 drop

Tanabe DF210
N/A, 5.0/3.0, 1.3/1.2 drop

Tanabe GF210
N/A, 5.0/4.0, 1.3/1.0 drop

Skunk2
Progressive all, 190-402/112-341, 1.8/1.6 drop

 

so assuming i want to drop about 1in no more or close to 1.5 because of my lip and NYC, what spring rate should I look for if i want to be comfortable and since i don't go to the track or race or anything?

 

i would do h&r sport or eibach pros... tirerack does a comparison on a bmw 3 series.. read that up and you will find the results.. one of them is slightly sportier and one is slighter more comfortable, i forget which is which, i want to say the h&r's handle better(which is what id get if I were you).. the progressive spring rate makes for a really nice ride.. nothing like the ground control+koni im about to install to my weekend autocrosser..

good luck

mike.

 

i was told to get tokico adjustable struts, and tein s tech springs that way i'm under 500, and at a 1.1-1.2 in drop. So.. the higher the spring rate the better the handling or better the comfort?

 

Sorta. Like I said, there's no standard way to measure spring rate, but higher=stiffer which usually means better handling. And, from the tirerack.com BMW test, H&R handled better, and Eibach rode smoother

 

I've also heard that it's not the height of the drop, but the higher the spring rate that causes more wear on the shocks.

Is this true?

 

Excellent info.

 

great info! does anyone know what the stock spring rates are on a 4thgen prelude vtec?

 

great post!

but what springs are on the ground control coilovers? i believe it's one of the eibachs up there. correct me if i'm wrong.

 

yeah they are eibach,probally the stiffer of the 2.

 

My H&R race's are beastly in turns.