I am willing to help anyone in my area, not many near me so online is the best I can usually do
Not sure if the STI is louder or not, the tires on the car we worked have been changed but they just howl on any kind of rough pavement so will look into them more. I am wondering if the bushings are so stiff they transmit alot of that into the body structure. The body is stiff but that low freq energy is the hardest to deal with and it is exceptionally strong in this particular car.
We are going to work on it more, I have a few more tricks up my sleave and we have improved it a great deal, just did not know there was so much noise from the rear of the car. Not going to do this until the end of the week, will post the results and the game plan is already part of the guide above. We are going to look at the shock towers and rear deck alot more critically as they are the only places really left to go after. Some work was done but it seems not quite enough. I may even test some thick acoustical foam under the rear deck if need be.
Anyway, we have done a great deal of good, the rest is just figuring out a few details and going after it, very interesting challenge, I like that
My son and I made my buddies F350 dual cab 6x6 turbo deisel with really noisy tires much quiter than this, sure we can do alot more with the STI