Blade Anti roll bars (Sellholm parts)

[gnutz2]

I've been searching the web for a solution to my handling issues on my golf and decided to sort out some decent anti roll bar systems on the car. At the moment the car runs only the standard 16mm RARB, the standard 26mm FARB wont fit on the car because the front sub frame has been modified. I have considered using an uprated (off the shelf) RARB, but for the front there is no off the shelf option so I've decided to go down this route.

I ordered 2x medium blades, 2x hard blades with 4x eccentric locking rings and weld on collars from Sellholm tuning. Great company to deal with and they speak good English.

For the ARB tube I'll be using t45 tube. I ordered 5 metres of 32.75mm diameter tube with 3.2mm wall from proformance metals. I went for this size tube because it's slightly stiffer than a standard 26mm FARB and if needed it could make full advantage of the blades on their hardest settings.

For the pillar blocks that hold the tube I'll be using 25mm aluminium square bar machined to accept nylon bushes, exactly like on Hamish's SWB

The last things I need to source are rod ends for the drop links which I'll probably get from McGill motorsport. And I need some A31 tig rods which I'm having trouble finding at a reasonable price.

Here are the blades

[G60Rallye]

They look lovely parts! I am sure with your skills you will knock something up which is both functional and good looking!

[Rusty]

What handling issues are you having Baz?

[gnutz2]

I get too much body roll and too much under steer. Understanding really as I effectively have no ARB's.

The t45 tube came today and I started making the mounts.

The plan is to fit these and do another track day, then re evaluate the chassis.

[AndyP]

http://www.cheltenhamweldingsupplies...24mm-461-p.asp

£15/Kg any good?

[gnutz2]

Thanks Andy, I did find them before but if you add vat and delivery onto the 1.6mm rods it works out at nearly £30.

In the meantime I've tapped a few local engineering firms

[AndyP]

Let me know if you're still struggleing and I'll see if I can get some through work

[Rusty]

Have you considered stiffer springs, as ARBs are more for chassis tuning than overcoming fundamental issues.

From research I did a while back, spring rates of around 600lb/in seem to be entry level trackday fodder. Race cars are neatly double that. KWs come with 360lb and 400lb depending on which kit you have. No idea about Avant rear rates but applying a similar multiplication factor with a little extra to account for the better weight distribution and under steer.

On my coupe, I'd go 10-20% stiffer at the rear than front.

[caterpillar]

you DO have the synco rear end, with audi diff, or???... then the syncro does have 18,5mm Rarb... AND the vw passat 35i syncro from 88 does have 22mm Rarb, and 35i syncro WITH nivåmat dampers, does have 25mm Rarb.. they DO fit in vw golf/ rabitt syncro... and FIT 32b syncro as well....( ive done this, and have the item at home)

[caterpillar]

and they are cheaper,and no isue with PPK....
it look like the org parts

[Rusty]

He has an Avant rear end.

[caterpillar]

avant from what car...??

[Rusty]

S2. It's a complete S2 Avant drive line in a mk.2 Golf.

[gnutz2]

Have you considered stiffer springs, as ARBs are more for chassis tuning than overcoming fundamental issues.

From research I did a while back, spring rates of around 600lb/in seem to be entry level trackday fodder. Race cars are neatly double that. KWs come with 360lb and 400lb depending on which kit you have. No idea about Avant rear rates but applying a similar multiplication factor with a little extra to account for the better weight distribution and under steer.

On my coupe, I'd go 10-20% stiffer at the rear than front.

Indeed Andy, ARBs will allow me to tune the balance of the car while reducing body roll, this is one reason I'm using blades.

When I get the car on track again I can see if I still require stiffer springs. What I don't want is 100% of my roll resistance to come from springs alone. Basically I'm using trial and error (with some rough calculations before hand).

[G60Rallye]

You are doing the right thing with the roll bars. Modern wrc cars are set up with quite compliant spring and damper rates but with stiff roll bars. I have found my bars which come from a wrc escort to have made a huge difference with KW coilovers.