Stiffest springs with bilstein sports?

[gearheadE30]

I'm running 350/475 rates on GC coilovers and bilstein sports and was wondering if there is a max spring rate suggested for these inserts. I;ve heard everything from 400 lb/in to 600 and above. I'd like to run 400 or 450 front but I don't really want to risk blowing the shocks. I'd get konis if I had the money, but with the M42 oil pan I'm not really going to need the extra slamming ability.

So yeah, and info would be great :)

[E30_fiend]

I am wondering the same thing. I am going to go coilovers soon and i want as hard a rate as possible with my billy sports

[BenM]

A friend of mine ran the GC 450F/650R (or 400/600, can't remember) setup on stock housings with regular bilstein sports on his DD 325i with no ill affects. And that was on crappy New England roads. I think that would be about the max I would go without getting them revalved.

[bataangpinoy]

im doing the cosmo race rates at about 400f 510r iirc. they seem to match perfectly.

the front is like viagra and the rear is too.

[E30_fiend]

you'll be kicking yourself later for buying cosmo coils. and FYI the rates are nowhere near 400 front or rear

[z31maniac]

Do what I'm going to do, order GC's 5 lug E30 coilovers. They build the strut to get more caster and it's only a few hundred more than the normal kit I believe.

[gearheadE30]

well, I already have the coilovers. I just want a little more stiffness.

[bataangpinoy]

ive done about 26 miles on some pretty rough ny backroads and i have no complaints.

[e30this]

Im running billie sports on stock housings. 550 front 750 rear.. At times it can be harsh, but works for me..

[bmwpower]

Do what I'm going to do, order GC's 5 lug E30 coilovers. They build the strut to get more caster and it's only a few hundred more than the normal kit I believe.

this stuff on the site?