CLASS RACER FORUM - View Single Post - Torsion Bar frontend "shimmy" on brogie roadster

555brogie · 01-07-2008, 03:37 AM

Could anyone lend me a hand in trying to eliminate a side to side "shimmy" in my brogie roadster with a torsion bar frontend/axle???

I run 1/4" toe in and have .001" clearance on all bushings to kingpins. More toe in slows it down.

I have 10 1/2 degrees of caster which all the chassis guys say is fine.

The shimmy starts on the top end and gets worse at a certain MPH zone (guessing around 50 mph down to 20mph) when stopping. It does shimmy while accelerating but I don't feel it at the wheel, however I can see it through the air holes in the fenders.

I installed a temporary funny car style "steering dampner" which slowed it down but didn't eliminate it.

I have a little bit of slack in the steering box which I believe may now be the culprit. No slop in any of the rod ends.

Any help would be greatly appreciated!!!!!!!

01-07-2008, 03:37 AM	#1
555brogie Junior Member Join Date: Dec 2007 Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Torsion Bar frontend "shimmy" on brogie roadster Could anyone lend me a hand in trying to eliminate a side to side "shimmy" in my brogie roadster with a torsion bar frontend/axle??? I run 1/4" toe in and have .001" clearance on all bushings to kingpins. More toe in slows it down. I have 10 1/2 degrees of caster which all the chassis guys say is fine. The shimmy starts on the top end and gets worse at a certain MPH zone (guessing around 50 mph down to 20mph) when stopping. It does shimmy while accelerating but I don't feel it at the wheel, however I can see it through the air holes in the fenders. I installed a temporary funny car style "steering dampner" which slowed it down but didn't eliminate it. I have a little bit of slack in the steering box which I believe may now be the culprit. No slop in any of the rod ends. Any help would be greatly appreciated!!!!!!!