Ive tried several lowering springs. Neuspeed, EMD, and 034. Also did Bilstein coilovers as well. The struts and shocks were non modified B8's.
First was the Neuspeed setup. The ride was pretty smooth but driven over any medium to large bumps the springs would bang together and make noise. That includes the front and rear setup. Since the B8 struts have internal bump stops these were left alone (for now). The rear bump stops were trimmed 1 1/4". As it turned out the fronts were riding on the bump stops at static ride height so they had no real room to compress and there fore made a loud bang going over bumps. The rears had plenty of room for compression ( about 1 1/2") at ride height but the springs still made noise. The only thing I could think of was that the Neuspeed were progressive rate and the closeness of the coils would bang against each other.
Second were the EMD's. Pretty much like the Neuspeeds. Except they were not progressive. They were even worse when going over bumps. I noticed that with the Neuspeed and EMD coils, they used a much thinner coil material, so they seemed softer. The 034's used 1/2" coil stock, much thicker than the others.
Third are the 034's. They have a nice ride (firm but smooth). Bumps dont seem to effect these as much. BUT. These are installed on modified B8 struts. I took the B8 strut apart and trimmed 1" from the internal bump stop. So instead of riding on the bump stops, I now have an inch before it contacts. Its not alot but it handles the bumps much better. The rears are the same from the other two tests. No noise what so ever. So these are what Im currently running and Im happy so far.
The Bilstein coilovers work very well. They do provide a some what smooth yet very firm ride. A little too firm for my everyday driver. But they were the most controlled and predictable of all the spring/shock setups. But as was said, too firm for my liking.
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