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Old 06-10-2004, 11:10 PM
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66 Impala suspension question

I have a 66 Impala with 2" drop spindles up front with springs that have two coils cut ( not torched ). The alignment is right on the money. The rear suspension has not been touched and I assume is original.

My ride on the freeway seems really nice. Not bouncing at all. But I notice a shaking in the steering wheel. The tires are balanced. My powering steer pump pulley is slightly bent...... So the shaking is one of my issues? Front end is all new poly bushings.....

Second issue is when I hit bumbs my car seems react to the bumps in a horizontal fashion. Like it wants to skip left or right... Now I realize the springs in the front are cut. But I am wondering how much the rear suspension and old bushings affect the handling. The rear has old springs(not sure if they are original) Air Shocks and old bushings. I wonder if the air shock could give me a rough ride? I have Edelbrock IAS shocks up front...

I know a lot of guys run cut springs and have no problems....

How can I tell if the car's handling is reacting the the front, rear, or both?


And there is a company called Jamco Suspension that sells lowering springs. They sell 1 , 2, and 3" lowering springs. Has anyone had any experience with Jamco?? And with lowering springs do they have the same amount of coils as a stock spring? How do they keep their ride yet allow the car to come done?

Here is a shot of my car as it sits now....





I would like to keep the same ride height but have the best ride possible...... Thanks..

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Last edited by black66; 06-10-2004 at 11:15 PM.
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Old 06-14-2004, 02:46 PM
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The shaking in the steering could be your centerlink - check the side where it connects to the pitman arm for wear. Usually, a bad centerlink shake happens when you are braking.

As far as horizontal bouncing - that's probably the air shocks or an alignment. I have new springs all around and air shocks in the rear set at 80 psi but don't get the horizontal bounce. Maybe 'cause of the lower pressure.
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Old 06-15-2004, 03:36 AM
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the horizontal reaction to the bums are called.... (drum-roll..)... "bumpsteer"

When the suspension travels up and down, the wheel moves up and down in an arc or half circle around a pivot point. This pivot point is not a physical location or suspension part but is an imaginary point on the chassis, similar to a vehicle's center of gravity. The distance from the pivot point to the wheel and spindle is equal at all points in the wheel's range of vertical movement. The tie rod and steering rack must be positioned so that as the wheel moves up and down, the tie rod follows an arc which is parallel to the arc followed by the spindle. If the steering rack or tie rod is not positioned correctly, the distance between the steering rack and wheel may differ from the distance between the pivot point to the wheel at different suspension heights. When this occurs the steering rack will push or pull the spindle as the suspension moves up or down thereby turning the wheel and causing a change in toe angle.

im not sure if there is a quick fix.. but you will need to fabricate something like this:



with the help of something like this:
http://www.maximummotorsports.com/mmbumpstg.asp
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Old 06-16-2004, 12:51 AM
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Thanks

I appreciate the info......... Thank you.....

Dave
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Old 07-04-2004, 09:42 PM
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black 66 nice car what size of rims and tires do you have on. The car shop sell lowering springs for your car so do a lot of other shops the spring is just a little smaller with the same amount of coils. I have them on my honda they work great nice ride I bought my through JC Whitney's
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