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Michael M3
10-16-2004, 12:37 PM
Guys,

I'm currently looking into getting a set of ethier Ground Control Coilovers or Koni Shocks + GC Springs. This car is my daily driven car so I don't want to compromise the ride quality to much. What spring rate front and rear would you recommend for a improvement in control but as close to stock ride quality as possible? I am also looking for a slightly lower stance. Maybe 1 inch all the around. Any suggestion in getting what I'm looking for? Thanks for all your help. It seems like you guys have alot of experience in the suspension department. Not much help over at M3Forum.com as they did not seem as focus in the driving aspect.

Thanks!

Michael

txse46m3
10-16-2004, 01:23 PM
reasonable. By changing the suspension, even with great care and research, you <i>will<i> change the ride quality. Going with softer springs will limit the reduction in quality, but going too soft creates other problems, like bottoming and coil bind. Also, the combination of springs and shocks provide an available height range - it may be that you need to lower a bit more than 1" to insure that the suspension hits the bump stops before coil bind occurs.

While you still have the stock suspension on, break out a tape measure. Measure the diameter of your wheels (wheel, not tire!). Then measure from the bottom of the wheel (wheel, not tire!) at it's lowest point straight up to the fender lip. Subtract from the wheel-to-fender distance 1/2 the diameter of your wheel. What you end up with is the hub to fender ride height. It's an easy, quick measurement that allows us all to discuss ride height with some convention in measurement.

I typically install the GC kit and set the front ride height to 13.5" and the rear to 13.0. (FYI - The car comes from the factory w/ ~1" of forward rake. This is somewhat masked by the fact that the rear fender lip is 1" closer to the ground than the front.)

That said, I believe that 6" 450lbs springs front and 7" 450lbs springs rear are an excellent combination w/ the GC Koni SA shocks. I've installed that combination twice now on a friend's car and it has turned out very nice both times. I typically install the GC kit and set the front ride height to 13.5" and the rear to 13.0. (FYI - The car comes from the factory w/ ~1" of forward rake. This is somewhat masked by the fact that the rear fender lip is 1" closer to the ground than the front.)

Discuss what you want with GC in the greatest detail possible while keeping your expectations reasonable and I believe you'll end up very happy. Jay, Dale, et. al. are a good crew.


Click here for pictures of my last GC install. 450lbs x 4, 13.5"F, 12.9" rear (http://bimmer.roadfly.org/bmw/forums/e46m3/5786611-1.html)<p align="center"><a href="http://www.doubledracing.net">
<img border="0" src="http://members.roadfly.com/txse46m3/hotsauce_scornedwoman.jpg"></a></p>

DoubleD Racing (http://www.doubledracing.net)
Mod List: Buncha stuff that makes it sound like a barrel of washers rolling down the street.

txse46m3
10-16-2004, 01:23 PM
<p align="center"><a href="http://www.doubledracing.net">
<img border="0" src="http://members.roadfly.com/txse46m3/hotsauce_scornedwoman.jpg"></a></p>

DoubleD Racing (http://www.doubledracing.net)
Mod List: Buncha stuff that makes it sound like a barrel of washers rolling down the street.

LandShark1
10-16-2004, 01:25 PM
they could sure recommend something that suit your driving taste!

Jay --> 530-677-8600

Dan Law --> 770-631-6779

I would say something in the 400lb range front and low-mid 500lb range rear will be good for a daily drive. but it also depends on how's your road condition tho!

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Previous >> 89' M3 || 90' M3 || 95' M3 || 98' M Roadster || current ride >> 03' M3 || 06-07' M3....again....? ;)

Happiness <b>IS NOT</b> around the corner!!
Happiness <b>IS</b> the corner!!

blkcollarworker
10-16-2004, 10:58 PM
Thank You. Trying to learn as much as I can before I make a decision.

Esteban_Tuero
10-17-2004, 12:32 AM

DanLaw
10-17-2004, 08:25 PM

gregwminmmoregon
10-17-2004, 09:40 PM

sxxb
10-18-2004, 08:26 AM
Call Dan Law. He can tailor a kit to your taste. He's a great guy to talk to and if you're lucky enough to live near Atlanta, he can install the kit for you. Highly recommend!


SB

"If everything seems under control, you're just not going fast enough." - Mario Andretti
"Racing is life. Everything that happens before or after, is just waiting." Steve McQueen

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