Eibach progressive springs explanation?

[guy_geo]

can soeone explain me how they work?

I have Eibach springs on my Z, but I have'nt driven it yet, so is there a visual way to tell the diference or it by the seat of the pants feeling?

[AxtellZ]

heres what MSA emailed me when i was shopping:

"We do have the European springs, they don't lower the car (so if you have

original springs, your car is likely to go back up substantially) and they

are 11-18% stiffer than stock. The Eibachs lower the car about 1" from stock

ride height, and are progressive, where they will be not far from stock

while cruising straight down the highway for comfort, but when you corner

they can get up to 25% stiffer. If you are NOT going to race at all with

these springs, the Eibachs would be a good bet. If you do plan to race later

with these springs, we would recommend the Tokico springs, which are up to

25% stiffer than stock, and just the fronts are slightly progressive. Apart

from stock, all will feel fairly stiffer, even the European ones. If going

back to original stock ride height is not a good option for you (plenty of

space above the tires) than don't choose the Europeans. "

If this leaves you with some more questions, let us know, you can also

request a current catalog at www.zcarparts.com/catalog.cfm

Motorsport Auto

1139 West Collins Ave

Orange, CA 92867

Sales (800)633-6331

Tech (714)639-2620

www.zcarparts.com

www.miataparts.com

[guy_geo]

Merci!

[2ManyZs]

The way to distinguish the progressive rate spring by looking at them is this. If you jack up the front end to take the weight off the suspension the coils will be spaced much further apart at the top of the spring than at the bottom. The more suspension travel you use (in cornering) the stiffer they will get. The stock or lowering springs of any type will have evenly spaced coils. Some progressive rate spring also may have slightly thicker diameter wire at the bottom, depending on how much progression the rate has.