What are arb and drop links?

zeeeebo

Lifes one big laugh
ok so my car is lowered at the moment just on springs with standard shocks and as far as im aware thats it, and am thinking about puting some coilovers on. there is alot of talk about arb or drop links? what are these and why are they needed for lowering and what difference do they make?

nathan
 

Westy

Registered User
I'm not too sure on the drop links function so I wont coment but the ARB (Anti Roll Bar) effects the amount of body roll the car chassis has when cornering.

Arbs come in different sizes which increase in diameter and reduce the amount of body roll. Arbs are not needed when lowering but a lot of people just change them at the same time as all the suspension components are off the car.
 

Essflee

Registered User
If you drop the car quite low you'll need new drop links eitherwise you'll get some nasty rubbing and knocking...
 

zeeeebo

Lifes one big laugh
k cheers guys=)
 

ben_turbo1

Registered User
When I lowered my old A3 1.8t i had to fit drop links as the ARB was rubbing on the drive shaft
 

jdas03

Registered User
I had new drop links fitted recently as mine were broke, what is their actuasl function?
 

kip

Registered User
I too have this problem with the ARB rubbing on the drivers side driveshaft. Will shorter links solve this problem or will the whole ARB bar need upgrading to a aftermarket one like KW? Mine currently loops over the driveshaft.
 

reptor245

Registered User

Audi_Alex

Registered User
I had new drop links fitted recently as mine were broke, what is their actuasl function?

An anti-roll bar is like a U-shaped piece of metal that twists to control body roll. The drop-links are small struts which connect from something that moves with the wheel (a wishbone, or damper or upright) to one end of the anti-roll bar. same with the other side, so when one wheel goes up on one side and the opposite goes down (when cornering) the drop-links help twist the anti-roll bar.

As for when lowering the car, the standard drop-links are pushing the (horizontal) position of the anti-roll bar into a raised position, potentially hitting other components like driveshafts when turning corners. Therefore, to restore the position of the anti-roll bar, shorter drop-links are required...

hope this helps! :)
 

reptor245

Registered User
Therefore, to restore the position of the anti-roll bar, shorter drop-links are required...

hope this helps! :)


You mean longer ones? if the car is lowered then the drive shaft is pushed higher as the springs are shorter. Thus making the ARB hit it. The longer the Drop links the more the ARB is pushed away from the drive shaft
 

kip

Registered User
Okay I had a look at the ajustable ones from the link, how do you know when you have achieved the correct height? Is it a case of a few extra turns more than the standard ones!. Would the longer links not be putting more strain on the arb because you are adding extra force to push it away. The arb mounting rubbers & brackets seem quite weak also.
 

kip

Registered User
Okay phoned performance 3000 today to get to the bottom of this issue,and they say to use shorter ajustable links to stop ARB knocking on the driveshaft. Some people are saying longer and some say shorter very confusing please clarify people who is using what if any. Mine is lowered 40mm and is running on 18" wheels.
 

zeeeebo

Lifes one big laugh
how much is this bar as mine is knocking at the mo going to raise it up slightly to see how low it can go without banging
 

tompearson

It's all in bits
I get a clanking noise when close to stall - is this the arb hitting the driveshaft?
Don't seem to notice a knocking at any other time though... (note - I have H&R Springs so not that low, and R32 arbs)
 

zeeeebo

Lifes one big laugh
i may be back in contact damian. its not doing it much, just if i hit a roundabout hard. i am making the front slightly higher so hopefully this will sort it out
 

reptor245

Registered User
Okay anyone using this type of ARB bar out there?.

Yup im running that whiteline ARB from DPM. Fixed my problem and drives like a dream now :)
 

kip

Registered User
What drop links are you using with the whiteline bar?. The standard links or aftermarket. Also what setup did you go for. The ajustable or non ajustable? Damian says you can have a softer or harder ride with the ajustable one.
Thanks
 

reptor245

Registered User
I went for the Non-Adjustable one. I was running the V-Maxx Adjustable drop links that damian said would cure my knocking but they didnt. In fact i found the V-Maxx one was so big, it almost rubbed on my brake pipes.
I sold them and bought OEM Drop links and fitted the Whiteline ARB and the car drives perfect now with no rubbing at all :rockwoot:
 

kip

Registered User
Okay thanks mate, I think I am gunner remove the links first have a trial run and make sure that this is the only knocking I am getting, and go from there.
Cheers
 
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