Decron

500 mile update

It's settled down a bit and now I am a bit more used to it it's a revelation. The overall handling is now brilliant, it's flatter, more composed and more stable. The steering is more accurate and there is no understeer.

I have no idea why they don't leave the factory like this

All I need to do now is get it to fit better

OctaviaT81

They need to make a Roomster vRS!

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Chrispy

Outstanding. Mine's going on this weekend weather pemitting. Also I can take a look at why my rear suspension is creaking over speed humps too. Bloody salty roads has probably knackered the rear shock mounts/ bushes.

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Silver '04 Fabia vRS. Jabba Custom Remap, Seat Surgeons Leather interior, Whiteline RARB, Cupra Console Bushes

StuartBell

And the manufacturers to make one specifically for the Roomster! We can but dream . . .

Stuart

Decron

Post Modification Update

Took the car up the workshop today to modify the bar to get fitting properly

I introduced it to the 20 ton hydralic press I happen to have handy and "tweeked" the offending end a little. I then refitted the bar without the shims I added



This is much better, as the clearance is now spot on with the other side. Looks like MK1 Eyeball is still king for measuring these things up



Whilst I was under it I decided to make another change. The instruction show the box sections fitted as in the above photo which would make sense to me but everywhere else I have looked have shown them fitted 90 degrees round, so I changed this and got a little more clearence Bar now looks like this and I am happy it's now a good fit;





Conclusion;

Was it worth it? Ultimately yes, the car now handles fantastically, better than a standard Fabia VRS (I am afraid so and it also has a better ride) although it's difficult to compare I feel the car is much more capable. The farting around I have done here will hopefully help anyone else who wants to try this get round these issues much easier and have a much better experiance. True the bar needs to be the right shape to start but knowing it could be problem you can just return it if you get one that isn't symmetrical, I reckon I had a duff one. It also helps knowing the instructions are there to be ignored I don't think the height off the floor is an issue, I haven't caught it in 800 miles and doubt I will as it's going to follow the wheel.

I always look at these type things as a challange and when they get more complicated than they should be I tend to just roll with it. If your looking for a simple plug and play solution this may not be it especially as you have to remember your fitting a part that isn't *really* meant for the car

Bottom line: I would really recommend this mod as long as you go into it knowing what I have discovered here.

Chrispy

Brilliant.

Glad you finally got it fitting ok. Looks like that 20 tonne hydraulic press came in handy.
Shame though that it came to that. If they could get the build quality sorted none of that would've been necessary.

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Silver '04 Fabia vRS. Jabba Custom Remap, Seat Surgeons Leather interior, Whiteline RARB, Cupra Console Bushes

mygokhan

how can i buy the ARB ?

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Decron

You can get one anywhere that sells Whiteline RARB's (For Mk4 Golf

mygokhan

Is "whiteline" the mark of it?

Can i find it from modify stores with the name of Golf 4?

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Decron

Start here

Whiteline Automotive - performance handling and suspension products. car spring coil shock damper swaybar sway bar anti-sway bush bushes australia australian whiteline automotive performance road holding turn-in camber caster toe in vehicle hot 4 v8

Then try here

Whiteline Anti-roll bars ARB ARBs, Whiteline Suspension for Audi, Ford Vauxhall Subaru Honda Nissan and many more

And here

rallynuts.com motorsport : WHITELINE motor sports & karting

I have no idea where to get one from in Turkey but you should get the idea. I am sure you can source one. The one you want is to fit the rear of the standard mk4 golf or the Octavia Mk1

mygokhan

Thank you so much are you glad after the application?

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steffo

Does the ride suffer at all?

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SKODA ROOMSTER 1.9TDI
ROOM FOR MORE

Decron

No, not at all. The bar is still noisey but I am working on a solution for that

gerasimos

Hello to everybody, i have a (silly perhaps) question. What the ARB does to Roomster? i am not familiar with Technical data and knowledge. I am goinf to buy a 1.4 Roomster in July and i wonder if i must do the same thing as you here in Greece

Thanks in advanced and i am sorry for my poor English

Best Regards
Makis

irfant

Whiteline and Eibach Anti-Roll bars ARBs uprated adjustable.AUDI, VW, Nissan, Subaru, BMW, Ford etc

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2007 Roomster 1.4 16V
http://www.skodaclubturkey.com

Decron

Don't be sorry, your english is far superior to a lot of users who only seem to be able to use the keypad of a mobile phone.

The Rear ARB or sway bar does the following;

A sway bar is usually a torsional spring that resists body roll motions. It is usually constructed out of a U-shaped piece of steel that connects to the body at two points, and at the left and right sides of the suspension. If the left and right wheels move together, the bar just rotates about its mounting points and does not bend. If the wheels move relative to each other, the bar is forced to twist.

The bar resists the bending through its stiffness. The stiffness of an anti-roll bar is based on the fourth power of its diameter, the stiffness of the material, the inverse of the length of the lever arms (i.e., the shorter the lever arm, the stiffer the bar), the geometry of the mounting points, and the rigidity of the bar's mounting points. Some anti-roll bars, particularly those intended for use in auto racing, are adjustable, allowing their stiffness to be altered by increasing or reducing the length of the lever arms. This permits the roll stiffness to be tuned for different situations without replacing the entire bar. The stiffer the bar, the more force required to move the left and right wheels relative to each other. This increases the amount of force required to make the body roll.

In a turn, the sprung mass of the vehicle's body produces a lateral force at the Center of Mass, proportional to lateral acceleration. Because the cg is usually not on the roll axis, the lateral force creates a moment about the roll axis that tends to roll the body. (The roll axis is a line that joins the front and rear roll centers (SAEJ670e). The moment is called the roll couple.

Roll couple is resisted by the suspension roll stiffness, which is a function of the spring rate of the vehicle's springs and of the anti-roll bars, if any. The use of anti-roll bars allows designers to reduce roll without making the suspension's springs stiffer in the vertical plane, which allows improved body control with less compromise of ride quality.

Anti-roll bars provide two main functions:

The first function is the reduction of body lean. The reduction of body lean is dependent on the total roll stiffness of the vehicle. Increasing the total roll stiffness of a vehicle does not change the steady state total load (weight) transfer from the inside wheels to the outside wheels, it only reduces body lean. The total lateral load transfer is determined by the CG height and track width.

The other function of anti roll bars is to tune the high g / limit understeer behavior of the vehicle. The limit understeer behavior is tuned by changing the proportion of the total roll stiffness that comes from the front and rear axles. Increasing the proportion of roll stiffness at the front will increase the proportion of the total weight transfer that the front axle reacts and decrease the proportion that the rear axle reacts. This will cause the outer front wheel to run at a higher slip angle, and the outer rear wheel to run at a lower slip angle, which is an understeer effect. Increasing the proportion of roll stiffness at the rear axle will have the opposite effect and decrease understeer.


Hope this helps.

KLM

^ Excellent explaination!!

fatty5000

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bahnstormer vrs

Rather than buying a Whiteline ARB and having to 'tinker' with it, I wonder if us Briskodians might persuade JabbaSport to produce a Fabia II/Roomster rear ARB as they did for the Fabia I.

I had one fitted to my Fabia 1.4mpi, the improvement in handling was a revelation and having just ordered a Roomster Scout I'd be interested in getting one.

Anyone?

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Mine - '07 Octavia vRS TDI, 'Summer Wheels' 8J x 18" B14s, Michelin Pilot Exalto 2 225/40 18, xenons, rear parking sensor, heated seats (driver's Recaro Style full leather), climate/jumbo etc., Koni FSDs, Neuspeed Rear ARB, K&N induction kit, RallyFlapZ - Colin McRae memorial decals.
Wife's - '08 Roomster Scout 1.6 Tiptronic, Cruise, parking sensors - Got it; Yiphee.
Son's - '02 Fabia 1.4mpi, vRS 16" alloys, Michelin Pilot Exalto 2 195/45 16, vRS front bumper, Koni Sport shocks.

Decron

In theory the Whiteline bar or any bar made to fit the mk4 Golf should fit fine without modification. I had a crap one, it wasn't shaped properly on the one end and instead of returning it I decided to just deal with it.

Check out the threads in the MK1 forum.