Proline Eibach and Turbo Tech Racing bar: is lower control bushing preloading needed?
 

Guys,

So Sunday I finished the install of my springs and sway bar. It sits lower, and the bar makes it much flatter in the twisties.

I do notice that it is a little boucier......maybe I should redo the bushing preload in the rear?

Chime in if you have experience with this.

Thanks,

QuickRick

its probably bouncier because the rear shocks cannot keep up with the new spring rates...how many miles on them and are they stock..?

amen.

It all has to do with the new location/ position of the shock valving on the rod..... the shock valve thinks you have hit a bump..... (it's sittin lower on the shock).....and now it gets firmer quicker.... I could go into a longer yap 'bout it but I type kinda slow and my spellin' sucks so you get the short answer. I'm sure others on here can give ya the long mechanical answer to your question. In the long run the correct way to lower is to have the shock length corrected to equal the amount of drop achieved when repacing the springs.....d@mn that took a long time to type..... Any one seen the little short bus 'round here? :lol:

Bouncy HHR
 

Guys,

Thanks,

These are the stock Sachs shocks with 15k miles.....I never recalled the others complaining about this phenomenon.

Makes me wonder how the Goldlines must be as they're even more extreme.

QR

Im not seeing the the valve location in the shock body having any effect whatsoever.. shock valving is reactive to fluid speed...period. When a shock 'settles' to a height its null...when it starts moving again then the valving action takes place, it doesn't care where it starts from, it senses fluid movement and reacts accordingly. A shock only controls how fast the weight is transferred to that wheel( the spring controls how much weight is transferred). Centering a valve to the shock body ensures that there is less chance of bottoming out or over extending in extreme conditions. Other then that there is no benefit of location in the body...unless of course you have a problem with springs falling out when jacking up the rear of the car because the shocks extend so far,,,,

How much was the drop ?

Wanta bet on that?

I'm afraid you have me at a loss. I've set up shocks from QA-1 to Nascar and I've never seen a shock that knows where it's at from a dead stop. Maybe you could explain this further.

I lowered my HHR on Goldlines, and rides a lil bit on the stiffer side, not really bouncy. I still have stock shocks with 29,000 miles on them. I ended up with about a 2" drop all the way around on my car.