How to resolve a twitchy back-end in 1/8 buggy?

[Finnster]

How is the rear sway bar setup? I'm assuming to the toe is locked?

[VintageMA]

Originally Posted by Finnster

How is the rear sway bar setup? I'm assuming to the toe is locked?

Yes toe is locked with kit settings. Not sure what you mean when you ask how the sway bar is setup?

[Finnster]

Originally Posted by VintageMA

Yes toe is locked with kit settings. Not sure what you mean when you ask how the sway bar is setup?

The amt of pre-load on the swaybar. Like JH said, sounds like you are not getting too little chassis roll.

[VintageMA]

Originally Posted by Finnster

The amt of pre-load on the swaybar. Like JH said, sounds like you are not getting too little chassis roll.

Gotcha - without having the buggy in front of me I can't say for sure how much pre-load I have on the sway-bar - I'm sure that is a value that changes for every manufacturer out there too.

[jhautz]

If the back end is sliding out to easy in turns you can do a few things to try and settle it down. First is to run softer springs/lighter shock oil in the back. This will allow the back end to roll a ltiile more and outside wheel to grab harder. Lighter or no sway bar in the rear could also help. If you are already feeling like the suspension is soft, then stiffening the front end will have a similar effect as softening the rear end. A stiffer front end will "push" a bit more and prevent the rear end from sliding as much also. Another possible solution is to raise the roll center on the rear end so the chassis rolls a bit more in the back and the rear end grabs.
Here is a great manual on chassis setup. It is from xray, but the principles apply to all buggies and truggies. Check it out.

http://www.teamxray.com/teamxray/sho...p?file_id=4461

[VintageMA]

Thanks Jeff - that's a great PDF. I gave it a quick read through and I think I am going to try to raise the rear roll center a little bit and that adjustment most accurately describes the problem that I am having.