Rear sway bars (anti roll bars) what got them and what didn't?

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TacosnBeer

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I may have missed this but... so, what would be better if you have a truck with a stock front sway bar only.... add the rear suburban bar... or take the stock beefy one off and add both the lighter bars from a burb?
 

Pinger

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I may have missed this but... so, what would be better if you have a truck with a stock front sway bar only.... add the rear suburban bar... or take the stock beefy one off and add both the lighter bars from a burb?

Probably the latter as that's what the GM engineers decided was better.

The thing to watch for is diagonal pitching.
In diagonal pitching the sway bar is active with the main spring. At the front there is soft spring and stiff bar, at the rear stiff spring and soft bar. If they get too close (in frequency terms) then diagonal pitching can ensue.
Not so bad as normal pitching as diagonally opposite wheels tend not to hit the same bumps and a frame with some flexibility wont so effectively couple the diagonal corners but when it does make its presence known it will be in fast sweeping bends and it really isn't pleasant. If it induces toe changes due to suspension geometry as it pitches - life gets pretty interesting!
 

TheAutumnWind

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Here's the right side front link.

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hard to tell with the link installed, but I think the front bracket bolts on too. When I can actually go in the pick a part yard and look at trucks and SUVs, I can be more certain.

What diameter is that bar you fitted and what diameter of bar is on the front?

Mine didn't come with the bracket to the frame. I've got some 1/4" angle laying around. Any chance you could give me some rough measurements for that bracket?

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89gmc

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As big as possible on the front no matter what
True. Nascar Cup cars have spring rates of about 450 lbs compression per inch on the right front , about 400 left front and 400 each on the back. The front sway bar is 2 inches in diameter!!! Years ago they ran 1600 RF, 1200 Left front 600 right rear, about 450 left rear. The sway bar was 1 1/4 inches. This is at a track like Atlanta. Modern cup cars have very little wheel travel and basically ride on their bump stops. Aerodynamic down force pushes the car of course down. The reason is more downforce = More speed.
 

Erik the Awful

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0xDEADBEEF

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