Just another spring rate thread.

[TobyB]

You should just try it and see.

The thing is, we all like different things, and what
fits your snap style might not suit someone
else's 'roll into it' style.

315 in front does seem very soft.
I have never really agreed with GC's 'equal wheel rate' recommendations.

t

[dirty30]

450/ 650 works well on the track but we have them paired with bilstein sports and they are a little under dampened. We ran with a guy that had what I would call a "backward" set up of 800/700 with koni SA's and sway bars although I don't remember the diameter. Some people with e30s use stiff rear springs in lieu of a rear sway bar, the more articulation the rear trailing arms have seems to keep the tires on the ground so the diff doesn't let loose (stock clutch LSD). Spec E30 guys are kind of split down the middle on this although they can only use H&R race springs. Less body roll doesn't always equate to better handling, I wouldn't base your vehicles handling profile soley on the amount of body roll you do/ don't have. You didn't say what you are using the car for besides the scandinavian flick which isn't really a road race move unless you want to piss everyone off or confuse people and "quick transitions" so maybe autocross is your thing? Autocross is a good way of really discovering the pros/ cons of your setup without endangering other drivers, your neighbors cat or little billy down the street when he runs after his basketball into the road. I'm not an expert in suspension geometry just my input for you.

[sgtskid]

I should also add that my car is a 1988 325 4dr in full dress. ;)

[sgtskid]

I am looking at buying a GC coil over kit for my car and would like advice and opinions on spring rates.

http://www.ground-control-store.com/products/description.php/II=912/CA=242

My current setup:
Bilstein Sports
IE Stage III springs 315F/570R
IE rear spring spacers
Urethane bushings all around
M3 offset control arm bushings
IE fixed camber plates
21mm front sway bar
16mm H&R 3 way rear sway bar (set full stiff)

The car has too much body roll for my taste. It doesn't handle well in quick transitions and I have grown accustom to throwing the car into turns, Scandinavian Flick style, to allow the suspension time to set before I actually start to apex.
What I do love is I can mat the gas at corner exit and have 0 worries about oversteer.

I talked with GC and they recommended 550 front and 850 rear but I have read where many people have issues with oversteer. I saw a thread where one gentleman was running 550/630 with a 25mm front sway bar and no rear sway bar and he loved it. Has several SCCA wins with that setup. Then I have read that e30s love 150% difference in springs which is what GC recommended...so.....?

Pelican recommends 450/500 for an "all out road race car"
http://www.pelicanparts.com/techarti...on_Recipes.htm


The car is a secondary DD and ride comfort is not a concern. I would like to retain the exit speed capabilities while reducing body roll. Goals: to handle quick transitions and sweepers (50-60mph) while maintaining neutrality. With that said, I was leaning towards 550/650.

Thoughts, input, comments?