Main Menu

964 Suspension Bouncing and Tire Howling

Suspension and Steering

Vehicle Information: Year: 1992; Body Type: Coupe; Engine (type, size, modifications): 3.6 stock; Total Mileage: 105,000;

I have changed my stock suspension to Bilstein/Eibach and while it made a huge improvement in all aspects of driving, I am concerned about what I perceive to be a slight bounce in the front end. I don't have this problem over smooth roads, so I assumed I'm noticing the bad roads more. Also, when I changed the suspension I put new S-03's on. Now the old rears did not need to be replaced but they became so noisy that you could not stand to drive the car. I can only describe the noise as a howling that was at its peak around 55 mph. Well I put the new tires on and for the first 500 miles they were fine, but now the rears are howling again. Tire pressure is 36psi front and back. The springs are a lowering spring and the shocks are HD. The shocks were the only ones available for my car. I contacted many suppliers including Bilstein and there were only one type of Bilstein shock available for my car and that was HD. I talked to an engineer at Bilstein and told him what I was planning to do and he said it wouldn't be a problem. The Eibach's are the pro kit springs.Any ideas?

You must log in to view answers associated with technical questions. Join PCA to participate in our community.
No votes yet