Suspension thingy

[AndyG]

When the rear wheel is off, i can see a horizontal piece of steel with 4 holes in it, which looks like a lever. There is a small rod from one of the holes down to what i think is the axle.

The other end of the lever finishes in a small box, from which there is a 20mm approx rod running across the car (behind the bulkhead) to the same configuration at the other side.

Yes i am a numpty.

But the holes in the lever obviously allow adjustment to the suspension, which end does what?

If i relocate the small rod to a hole nearer the fulcrum point what changes will occur?

Andy

 

Tantrum

[Stationary M25 Traveller]

What sort of Seven, how old, and what sort of rear suspension - live axle (1970's style), or a de Dion Tube with the diff bolted to the chassis of the car and visible drive shafts connected to the hubs on the end of the DD tube ?

 

7 related photos

[Sheds Moderator]

This is the adjustable rear anti roll bar (ARB) mechanism. The drilled bar connects to the rear ARB and in a corner one wheel compresses and the other rises as the car rolls. The ARB does its job by twisting, if you look at the mechanism you will see you have to bend/twist the bar to compress the susp on one side compared to the other. This is hard work. The attachment point varies the amount of twisting and hence resistance to roll. For road use the rear ARB is generally disconnected.

[AndyG]

Thanks very much battered , I presume connecting the ARB at the hole nearest the fulcrum will induce more oversteer?

FYI it is a 2000 Superlight, dedion, LSD

 

andy

 

Tantrum

[MartinWoodham]

*arrowup*oh yes indeed!

On my car, with the stiffest front bar fitted (green) on narrow track front, setting the rear at the second hole from the front gives pronounced oversteer in slow corners. Goodness knows what the front hole does.....

 

For road use I generally have it on the rear hole, on the track I have it one in from the rear.

Bear in mind that the bar that you have on the front will make a difference - a softer front bar will indicate going even softer on the back, ie rear hole only or disconnect. (easiest way to disconnect is to undo one side only and tape the droplink to the bar itself.)

 

Martin

supersported ex-Roadsports B

 

Edited by - mwoodham on 3 Mar 2008 09:47:20

[AndyG]

Cheers Martin

Have i got a front one then? What should i look for?

This blatchat is fantastic, i have learnt a lot, bearing in mind i did not even know it was an ARB!!

AndyG

[shn7]

AndyG,

 

Yes you will have a front ARB. It runs from one upper suspension wishbone round the front of the chassis behind the radiator and through a couple of coloured (different depending upon thickness of the ARB) bushes to the other front upper wishbone.

 

Steve.

Sussex (West) AR

Not forgetting Percy the Polar Bear

[irrotational]

If its an older car the bushes may look as black as the chassis 😳 so clean with a cloth to discover the colour.

 

If you click on 7FAQ in the top right corner of the screen you should be able to see a list of what colour means what hardness...

 

I have just discovered mine is green 😬

 

---

my mind is blank....

[millsn]

I would have thought that full soft on these required the hole furthest from the fulcrum. The nearest one would result in less twisting of the ARB