car shakes

[99 gst spyder]

i just put my tein springs on about three months ago and noticing that when i hit a small bump or big bump, the car waves from left to right making everything inside of my car rattles alot. i notice my driver side motor mount insert was torn i thought it could be that too that makes my car shake but i'm not sure....it didn't do this before i put my springs in and before that too i don't know if my mount inserts were torn or not too... so what do you guys think it might be..?
so do you think it could be it when i lower the car with the springs or maybe i have a torn insert in the mount..?

 

[crimsondragon]

...did you put in aftermarket shocks with those springs? You will have a shitty ride with lowering springs without shocks to compensate. Also your camber is probably messed up from the springs as well. Fix your drive side mount as well. I doubt that's the cause.

 

[Boost92awd]

Jack up the front of your car and move the tire from side to side and up and down. If there any play here, it could either be a ball joint, tie rod end, or a wheel bearing.

 

[gixxerdrew]

from the looks of the photos in your gallery you may be bottoming out the suspension. Either on shock travel or on the control arms into the fender DSMs have very little travel to start with and lowering springs can get you into bump stops or fenders in a big hurry.

Are you using bump stops still?

 

[DGajre777]

My car doesn't shake but it "waves" from one side to another when I hit a bump. I always assumed that it was because of the negative camber on the front wheels caused by the lowering and not using a front camber kit. (Some one correct me if I'm wrong).

As for camber, I have:
Left Front: -0.7 (Range is 0.4 to -0.6)
Right Front: -1.0 (Range is -0.6 to 0.4)
Left Rear: -1.1 (Range is -0.8 to -1.8)
Right Rear: -1.0 (Range is -1.8 to -0.8)

The toe for all four corners are in spec and in the middle. I have Eibach Pros with Tokico Illuminas and RRE's rear camber kit (bump stops were cut as per Eibach instructions).