07-14-2008, 12:45 PM
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#24
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Re: new wheels pics!
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Naturally Aspirated
Join Date: Jul 2008
Location: California
My Ride: Magnum R/T
1/4: 0.000
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From the factory, springs are designed to work in conjunction with the damper/strut/shock. Those Eibachs were designed with your Omni's factory strut in mind, but since you are riding on the Koni's, the equation is a little different. From what I've heard, Koni's have a huge range of adjustability, so you can run a fairly stiff spring and not impact the ride quality too much. 275 is a good spring rate for the Koni's, but I think you are experiencing a bouncy ride in the back because your rear springs are significantly softer. That's why you have to adjust the Koni's in the rear to be more firm because you are having to compensate for a softer spring back there. You always want the rear springs to be softer than the front springs, but if the Eibachs were closer to 275F/250R, you would have a more refined and performance-oriented suspension without sacrificing ride quality. That's the theory anyway.
If you start road racing and end up changing out your springs, I'd consider bumping up the spring rates a little more. Something like 300-325 in the front and 275-300 in the rear is what I would aim for. Just make sure you don't lower the car anymore than it already is... if you do, you could end up removing all of the suspension travel that the Koni's use to keep your ride quality nice.
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