Blade? type ARB thickness/material.
Turbo Mini Forums

I am going to using a rear ARB in my car. I'm going for a blade type (if i'm right that's the type with tube welded between the turrets with blades coming off it and then link rods through the floor to the radius arms?).

I'm in need of some information about what diameter of tube, and what wall thickness to make it out of. Also what material.

I'm placing an order for lots of T45 soon and its looking like i'm likely to have so spare. Would this be appropriate in the right dimensions?

I know it depends on a few things like vehicle weight etc but i just need a starting point really. It will have some adjustment like normal. Its going to be rather light on the back end also if that makes a difference.

Cheers, James

I was adviced to buy the KAD one. That one is a blade type. Not sure if KAD makes different blades though.

Sellholms Sweden sells blade ARB kits, you rotate the blades to set the stiffness, end mounting point is the same, they can be made in-car adjustable to

for some inspiration

http://sellholm.se/

they are under "övrigt" and then "krängningshämmare" fore pics/parts

Edited by G13B on 1st Sep, 2009.

internationally known as "big" swede

James,

Dont weld the tube to the turrets, the tube needs to be able to rotate.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Found some pics of my "dream" setup,

internationally known as "big" swede

You can choose. Either use the bar as a twisting medium, or use a solid bar and have the arms be adjustable.

Edited by Vegard on 1st Sep, 2009.

Confused. I'm in need of more research i think.

I like the idea of the twisted bar, but all that lot looks bloody heavy

Team Racing

How is yours done Jim?

OOOO i'm sure i've seen a pic of Paul and Sturgeos mig set-up somewhere..searching time!

I didn't realise that the torsion tube was quite so large.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Yeah, just been looking at that in the other thread Paul.

How does it pivot as it goes through those plates by the turrets?

The tube does not go through the plates by the turrets. The tube stops short and must run on a bearing fixed to the plate.

I'll try and get a photo, but the cars on the ramp with the rear end against the window, so a bit tricky.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I've just had a look, the best way i can describe it is that there is a tube bolted between the turrets and then the arb is like a sleave and pivots on the tube.

I think the old boys just gone out to take some pictures that can explain it better.

that setup looks pretty solid how much twist does it give?

Yes i moved to the darkside

Instagram @jdm_brett

I still reckon that there is just a bearing in the end.

Needs some paint though.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I see. Very interesting.

Because i want to have a "strut brace" type arrangement between the turrets (no bulkhead) this set-up might take abit of fiddling to get in. And may be alittle heavy.

Im thinking a 1" T45 "strut brace welded between the towers.

Then a blade arrangement similat to this:





Because of having no bulkhead and a flat boot floor i can mount this inside bolted to the floor and then drop the link rods through the floor like in you set-up.

Opinions?

Edited by James_H on 1st Sep, 2009.

have a look in my build I think I have just made exactly what you are thinking of.

that twisting blade type is used on lola race cars and a certain metro turbo challange car I have had looked under.

Where did you find this?? is it just a universall one.

I think ul need a brace across the car aswell james, dont use the arb to do that aswell as control roll.

As far as i was aware, the shorter the drop links the better so if it can be mounted under the car it may be better.

Kad do two different types, one for a rear beam (the one i have) or one for a subframe. the first being round bar (3/4")dia and the subby one is designed to fit to the rear and face forward but has nice detatchable blade ends.

Rick

On 1st Sep, 2009 James_H said:
I see. Very interesting.

Because i want to have a "strut brace" type arrangement between the turrets (no bulkhead) this set-up might take abit of fiddling to get in. And may be alittle heavy.

Im thinking a 1" T45 "strut brace welded between the towers.

Then a blade arrangement similat to this:





Because of having no bulkhead and a flat boot floor i can mount this inside bolted to the floor and then drop the link rods through the floor like in you set-up.

Opinions?

Rick, i got that from www.alfaholics.com through google, search blade anti roll bar.

Its for some form of alfa believe it or not

I've decided that im now going to use a brace bar aswell as a ARB and not try to combine it.

If i could mock up a drawing i would but my art skills are about as much use as a horse mating an ant.

Its basically going to be a brace between the Towers, and then, bolted to the floor bellow that (could easily be underneath, saves having holes in the floor. Although means the car would have to be jacked up to adjust.), an ARB very similar to the one off alfaholics just made to fit my car obviously.

I'm thinking i'll make the brace and main bar of the ARB from 1" 1.6mm wall T45 and then get the blades and "end tubes" for the ARB made to spec.

Although i'll need to research more on the actual blades.

What do we think about the stiffness of the T45 for the main bar of the ARB? Bearing in mind that the blades will be able to compensate for it being too stiff i guess?

Edited by James_H on 1st Sep, 2009.

Some of our cars at work have adjustable blade arbs with a cable adjustor to alter the stiffness as the tyres go off through a race. Not quite what you need for a min though!!

It would be handy to be able to tweak it until you find a happy medium then lock it up.