I just stumbled upon an interesting article ( interesting for me anyway ) that talks about a rear sway bar being the best bang for your buck in the handling department, particularly on fwd cars...
http://www.autospeed.com/cms/A_113179/article.html
Has anyone had any experience with fitting a rear sway bar on a 2cv? Is there enough space to run one under the body on top of the rear cross tube and along the tops of the suspension arms? I had better climb under and have a look...

Cheers

Harley

As far as i remember, a sway bar will fit on top of the arms.
Just weld a thick strip of metal on the flat part of the arm, drill an tap M10, and mount with the same sort of clamps as the original.
I've mount an Ami Super one, in the Ami Super intended way, but for this you'll have to modify the box section.
Mounting a front anti roll bar without a rear one, is the worst thing you can do, if you like to go fast trough short bends. I've never understood why people mount them anyway.

I am not a suspension guru, but iifc from school a anti roll bar is a compromise.
It gives less body roll (which can be a benefit for handling) but gives higher load on the outer wheel and lower on the inner wheel (which is not a benefit for handling).
Years ago I asked a friend who does a lot of 2cv racing why he wasn't running an anti roll bar and he said a anti roll bar is for pussies.
I had one on my road 2cv, but got bored as a front anti roll bar it tends to understeer.

A rear anti roll would tend to oversteer (if I understood the rule of thumb right) don't know if that is what you want..

to get the ass hung out on a 2cv = win
I did it once in the wet making a left hand turn to quickly, let up off the throttle and it corrected nicely
I would prefer oversteer to understeer , thinking about how it would react on dirt roads.
I think your memory is sound, I can see that a sway bar is a compromise on a road racer when you can uprate the springs. I currently have a front sway bar fitted and like the way it reacts.

Unlikely letting off the power would prevent oversteer - more likely to promote it into even more of a whoopsie brown trouser moment! Power on is the best way to stop oversteer in a front driver and visa versa in a rear driver.......

When on the limit, if you power off suddenly engine braking slows the front and the tail comes out.

ps
Having had a Subaru, it brilliant way for exiting Roundabouts and it puts the other driver off!

Fitting one from an Ami is probably easiest, but if you can't find one over there and decide to make your own, then as well as copying the way the Ami one fits, you could also run a bar through the middle of the axle tube, similar to the way the rear suspension arms have been joined on this 3 wheeler. Scroll all the way down.

http://www.citroenspecialsclub.org/foru ... c0e468f2b9

Nice post Joolz, I miss you
I remember that the Argentinian group 'Sava' (?) Ran it through the axle tube on there modern chassis, not sure where they ran the brake lines thought...
it lookks lime one side is keyed on the lomax and the other side welded! But hopefully not...
Someone did tell me moons ago that the ami bar wont clear the 2cv body or similar... I think I'll just go custom on it And will consider through the axel tube.
Now I wonder what is the difference, if any, between an anti roll bar and a torsion bar...
Thinking the anti roll bar is like on the front of an ami, u shaped and held in place along the legs of the bar. Where as a Torsion bar is straight and held in place by spigots either end.
Or does it make no difference at all!?

I would be carefull with anti roll bars.
Like I said I didn't like the front bar in the end. I had a little understeer accident (obviously down to driving style in the first place)
I find a std 2cv tends to oversteer in the wet. I also once made a proper 180°+ turn on a wet curve (again driving of course), so/but would be careful to promote oversteer with a rear roll bar.
You would very likely not catch this with a rear anti roll bar (video is on facebook, but I don't know how to ad, this is a quick screan shot)

I can't see that there is any fundamental difference between an anti roll bar and a torsion bar, firstly I'd say they are both torsion bars by definition, then specifically one's an anti roll bar, and ones a suspension spring. They are both springs, designed to twist under load and then return back when the force is removed. Are they made from special spring steel? Quite probably in the case of torsion bars, maybe in the case of anti roll bars. Is there any reason for the different styles in the way they are usually mounted? Just convenience I reckon, and the fact that a suspension spring has higher and more permanent loads on it.
I would be hesitant about messing around with a suspension spring because their failure could be very inconvenient at best, but a failed anti roll bar shouldn't be any major issue so I think its safe to experiment.
Lastly if running it through the axle tube I'd probably slide a piece of plastic water pipe over it to lower the risk of it wearing through the brake pipes.