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Old 06-26-2009, 05:24 PM

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Front Four Bar Angle

I am in the process of tacking my front four bar to my frame that I created on my studebaker project. Since I went with such a large tire size, the front area of the frame is rather tall off the ground. This is using air ride as well. I currently have the frame 4" off the ground (ride height), and the bottom side of the front of the frame is 16" tall.

When I set my four bar up with the kit from Speedway, the mounts supplied will set the four bars at a 4 degree angle sloping towards the front of the car. This is with the frame mount welded underneath the frame rail.

What is the desired four bar angle at ride height (I assume 0 degrees). Is there a problem with doing otherwise?


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Old 06-27-2009, 07:32 AM
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Originally Posted by 71gtx
What is the desired four bar angle at ride height (I assume 0 degrees). Is there a problem with doing otherwise?

The angle of the 4-bars is not where you should be concerned. They should be parallel to each other.

It is the angle of the kingpins that you should be concerned with.(Caster angle)

This is adjusted by screwing the ends of the 4-bars in or out as needed to yield the correct angle. The angle for a straight axle should be in the range of 5-7 degrees towards the rear with the car at ride height. 0 degrees will not work. That 0 degree angle will yield wandering as well as shimmy and the steering will not "return to center".

Last edited by Frisco; 06-27-2009 at 08:17 AM.
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