Trailing Arms For More Neg Camber And More Toe In

[ftoomsh 5 1 Cars]

Like a staffy bull having a pee! Lol

[petert 555]

depends how you want it to handle, personally I'd use the ZX arms so it turns in better,

I agree. Fitting the 306 arms was a mistake for me in retrospect, but I do circuits/supersprints, rarely in a straight line for any length of time.

[Rich_p 23]

Borrowed from another thread

 

Year--Model--Rear toe in (mm)--Rear negative camber(degrees/minutes)

 

1985-92--205 GTi 1.6+1.9/Rallye--3.60--0/50

1985-92--205+309 base--3.10--0/50

1993on--205 Cab+van+base--3.40--0/50

1986-90--309GTi--3.80--0/50

1990-93--309GTi+GTi16S--5.00--1/15

1994on--306 S16+GTi6--4.20--1/20

1997on--306 1.8 16v--3.40--1/20

1998on Xsara base--4.50--1/20

1998on Xsara VTS--5.00--1/20

1993on ZX base+16v--0.00-1/00

[ftoomsh 5 1 Cars]

Excellent info thanks!

[allanallen 528 2 Cars]

Bare in mind those figures are for the cars they originally came fitted to at standard ride height. eg: a lowered 205 fitted with 306, zx or xsara rear arms will not have the above advertised geometry.

[welshpug 1,627]

any rough idea how much they change at roughly 30mm drop Allan? would be easier to figure if there was a degree figure for the toe not MM I guess.

[ftoomsh 5 1 Cars]

Do the rear arms not swing vertically? I.e. the shaft is parallel to the horizontal.and therefore the rear arm geometry remains the same where ever it is in its arc?????

[welshpug 1,627]

They do indeed, the only way the geometry would stay fixed is if there was no camber or toe at all.

[ftoomsh 5 1 Cars]

ah of course ...senior moment there me thinks..

 

so looking at the figures above 306 1.8 16v arms could be a good compromise, with some toe in 3.4mm (but less than 205 gti standard 3.6mm) but with 1.2 deg -ve camber????

[allanallen 528 2 Cars]

any rough idea how much they change at roughly 30mm drop Allan? would be easier to figure if there was a degree figure for the toe not MM I guess.

Not really, I've a rough idea what our arms do but they've got stacks of camber on, they're machined car specific to avoid any change.

 

A 205 lowered 30mm will have a negligible change,it's more obvious when you go from say a xsara to a lowered 205 that you get the big difference.

The angle of the arm is very different between models. A 306 arm sits with the stub axle around 40mm lower than the centre of the beam tube, a lowered (-40mm ish) 205 sits with the arm 40-50mm above the centreline of the beam tube!

[ftoomsh 5 1 Cars]

So which arms for tarmac rallying (tour of mull being extremely bumpy) would you recommend Allan?

[allanallen 528 2 Cars]

What ride height and tyres do you run? Do you want toe in and do you need more negative camber?

[ftoomsh 5 1 Cars]

Ride height is pretty much standard was hoping to gain more neg camber

[welshpug 1,627]

ah! I guess the spring rates and starting position makes quite a difference.

[allanallen 528 2 Cars]

ah! I guess the spring rates and starting position makes quite a difference.

Certainly do, henry1.9 is a good man to talk to re rear arms for circuit stuff, he's had a few different settings now. He's currently on -3.5 and zero toe.

 

Ftoomsh: standard arms wise as mentioned probs zx arms or the 1800s as you said for even more toe in.

I like the predictability and safeness at the rear of my road rally car. it'd be no doubt faster with less toe but when you don't know where you're going a mid bend lift doesn't end with you in a wall

[ftoomsh 5 1 Cars]

I think I agree with you there allan!