IE stage 3 spring rates?

[spud814]

Hey Guys,
I have read that the IE stage3 race sprigns are the same as H&R race springs but a lot cheaper. RIght now i run H&R sport springs but there seems to be alot of body roll still and i woudl like to change over to race springs. I'm curious if u guys know the springs rates for: H&R sports, IE stage 3, and the Eibach Pro Kit? Also how streetable is these springs since they are linear springs if i remember correctly? Thanks in advance guys.

-gil

[Brian 89 325i]

Im not sure of the exact rates, but they ARE progressive, not linear. I run the IE stage 3's, and id reccomend it to anyone.

Brian

[darien28]

I've been told somewhere around 450/650 F/R. they're supposed to be replicas of the HR E30 M3 race springs, but with slightly higher front rates for teh M20 vs the S14...

Only one of the spring pairs are progressive, either front or rear, but I forget which. at least that's how they are on teh HR springs, so I'd assume the IE3's are the same since they're just replicas.

BTW, FYI they're made by Eibach.

i have them and I love them.

[spud814]

so how much differs on the ie stage 3 springs compared to the H&R sport?

[spud814]

Hey guys,

I just got the spring rates from Doug at turnermotorsport. This is what he said the spring rates are....

H&R Sport: 190F, 343R
Race: 240F, 570R

Arent' these spring rates a little bit odd? Why is the back increased so much and the front so little is it a typo?

What will this do to handling if these figures are right, does anyone know?

[plain325]

because the front springs area attached right to the spindle there isnt any lever action acting on them like the rear springs would have. If you look at the design of the rear suspension you would see that the springs move less in the rear for a given amount of wheel travel than the fronts.