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RS4 ARB

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by EssexAvantii, Nov 14, 2013.

  1. EssexAvantii
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    EssexAvantii New Member

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    Hi, a mate of mine has an A4 avant same as mine (but 130 TDI) Hes about to put some coilovers on and whilst the rear is in bits wants to upgrade the rear ARB. We have been reading up and noticed that the RS4 ARB is the thickest OEM Audi made.
    Question, will this fit onto the FWD chassis with the RS4 being 4WD?
    If it does i may end up doing the same. Thanks for any help in advance
    #1
  2. DieselJake
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  3. EssexAvantii
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    EssexAvantii New Member

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    Thanks for the reply Dieseljake, Do you know it fits from experience or you know others have done it?
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  4. DieselJake
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    Here's mine:

    [​IMG]

    Definitely fits and will be going on soon hopefully.

    Plenty of threads around on the bar.
    #4
  5. EssexAvantii
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    EssexAvantii New Member

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    Is that new Dieseljake? Part number? Cost? sorry being nosey thanks for replying
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  6. DieselJake
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    [​IMG]

    (minus "mounting")
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  7. GeoffDunk
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    GeoffDunk Member

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    Do it!!!!

    All in cost for parts approx. £95.

    I paid £132 all in parts and fitting for my S4, made a world of diffentce, a must have upgrade.

    Note: do not upgrade the front, rear only.
    #7
  8. EssexAvantii
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    EssexAvantii New Member

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    cheers GeoffDunk, Considerably cheaper than i thought! Sold im off to spares Dept!
    Facepalm- just found the other threads doh!
    Thanks for the info guys do you recommend any mid priced coilovers?
    #8
  9. SmoothAssault
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    SmoothAssault Will design for mods

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    Don't people also recommend replacing the drop links at the same time?
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  10. Mike.M
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    Mike.M Well-Known Member

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    Blimey that is expensive. I paid £56 for the rs4 ARB from TPS several months ago. Def get new bushes, clamps and bolts.
    #10
  11. EssexAvantii
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    EssexAvantii New Member

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    Mike.m i was looking at a thread elsewhere in the forum and they appear to have steadily gone up in price over the last few months!:sob:
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  12. Mike.M
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    Mike.M Well-Known Member

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    Looks like it as I paid about £70 for everything which was very reasonable.......but guess they have cottoned on and bumped the price up like the cupra r splitter.
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  13. SmoothAssault
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    SmoothAssault Will design for mods

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    The prices will go up as stock gets lower. It's not likely they're still manufacturing anti-roll bars for a car that that went out of production in 2008. They'll be a quantity based on the life expectancy of the part and how many RS4s were build sitting in some warehouse. They're not going to want to put those parts back into production.

    That is unless the B7 RS4 ARB happens to be identical to the B8 RS4 part, in which case, yes, the price increase is ********. :p
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  14. DieselJake
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    Always thought they continue manufacturing parts for all models :shrug: I've been supplied with parts from b5's.
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  15. Mike.M
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    Mike.M Well-Known Member

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    Yes they do keep making parts and bump the prices of the popular/high demand stuff like this, cupra r splitters etc. I used to work at the HQ and also visited the huge warehouse and I mean huge LOL as it has its own train station inside.
    #15
  16. SmoothAssault
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    SmoothAssault Will design for mods

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    They will obviously make whatever is needed to meet demand, but no manufacturer wants to put old parts back into production. Before it comes to that prices start going up as stock gets lower.

    (as explained to me by a factory worker from one of the 'other' car German manufacturers. *spits in disgust*)

    Amazing that the HQ has it's own train station! LOL! I hope they pull the carriages with a Veyron?
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  17. EssexAvantii
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    EssexAvantii New Member

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    Do these really need changing as well?
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  18. Mike.M
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    Mike.M Well-Known Member

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    I did not change mine, all depends on the condition of yours.
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  19. p1tse
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    p1tse Member

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    Why is it rear only and not the front?

    What's typical labour cost?
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  20. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    The fronts are all the same. I can't imagine anyone would charge you more than an hours labour.
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  21. DieselJake
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    Stiffer rear bars dial out understeer, a stiffer front would do the opposite which is not desirable, the front is the same size across all variations (for this reason).
    #21
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  22. p1tse
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    p1tse Member

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    Thanks

    I read on the other thread it may effect grip, which I'm trying to think why?
    #22
  23. foursprungdugtechnique
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    foursprungdugtechnique Member

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    I have a 2000 W reg B5 Avant, going over some (not all) imperfections on the road, such as a poor repair straight across the carriageway it skips the rear very slightly to the left. Springs & axle bushes, all replaced 2013, shocks done about 30,000 miles. Any ideas what could be happening? Axle not bent, geometry check is within tolerance. Car runs standard height suspension
    #23
  24. dualmono21
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    dualmono21 Well-Known Member

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    a stiffer rear anti roll bar does not dial out understeer
    it is exactly as it says its stops the car from rolling .... when the car rolls in to a corner the car feels unsettled

    when you increase the width of the anti roll bar you attempt to kill the bodyroll by increasing the tension between the two back wheels so s they are more even
    the counteract of doing this is you lose rear grip by giving the car less chance to manuever the wheels into a position whereas they can gain traction this effect is most noticeable when exiting a corner

    if you want to stop the car from rolling then fine change the anti roll bar , if you think by changing the anti roll bar you are suddenly going to gain the handling charecteristics of an rs4 then think again you could indeed be making it worse for what you actually want
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  25. adamss24
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    adamss24 Well-Known Member

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    Wrong forum, this is b6 and your question is for a b5... Take the car to someone with a proper Hunter machine for a geometry check and make sure they use the right settings for your particular suspension...
    #25
  26. Mike.M
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    Mike.M Well-Known Member

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    Also check the tyres are not worn
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  27. DieselJake
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    [​IMG]
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  28. WeeHector
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    So is this a mod that can be effective on it's own, or will it only make a real difference as part of, say, a full suspension upgrade?
    #28
  29. DieselJake
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    Probably more effective on it's own, many people give this mod rave reviews although if you have decent aftermarket springs and dampers already it won't make much difference (etleast from my experience).
    #29
  30. dualmono21
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    dualmono21 Well-Known Member

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    2wd and 4wd will not have the same results from simply changing the rear ANTI ROLL BAR (theres a clue in the name)

    reduce rear tyre pressure , stiffer rear springs and increase the camber on the rear of the car you can also try putting thinner tyres on the front of the car and increasing the pressure of the front tyres ... this will have the effect of reducing understeer

    simply changing the rear anti roll bar without doing anything else to the car will stiffen the rear of the car up so as the body will not roll and the weight will not be able to be put over the contact patch the consequence is you will lose you rear grip on both entry and exit of the corner

    the car may feel more stable but only because its actually slower
    #30
  31. DieselJake
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    Handling balance and drive terrain are two very different things.

    Increasing oversteer (desired effect of this mod).

    Now you're being silly, unless that extra couple grams of bar weight will noticeably reduce speed :laugh:
    #31
  32. dualmono21
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    dualmono21 Well-Known Member

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    you do not alter the same things to set up a front wheel drive 2wd car as you do a 4wd car nothing whatsoever to do with terrain

    changing to a thicker rear anti roll bar does not increase or decrease oversteer or understeer it simply stops the car from transferring weight from side to side as much and as quickly
    it gives less body roll and weight transfer
    because you cannot transfer all the weight of the car onto the contact areas of the tyres you have less grip with the road
    if you have less grip you can neither enter or exit a corner as fast

    adding rear camber effectively moves the contact patch of the tyre towards the inside of the tyre slightly but reducing tyre pressure makes the contact area bigger so as when weight is transferred onto it you have a larger contact area and more grip

    increasing the anti roll bar size will for most people make the car feel more stable because the car does not roll however when pushed
    the car will not be able to transfer its weight from one side to another giving less grip

    less grip on a 4wd car round a corner only means one thing less speed
    #32
  33. DieselJake
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    Roll bars, suspension and dampers have the same concept regardless of FWD or Quattro, for performance they are stiffened/shortened the same (taking weight differences into account). if anything the bar will benefit Quattro systems more because when the car lift-off oversteer's (entire point of this mod) and the rear wheels regain traction they will better help stabilise the car, this is the reason Audi puts stiffer rear bars on most Quattro models as standard.

    Camber, tyre pressure, stiffer springs, thinner/thicker tyres... yes... yes they do contribute to handling, lets throw a roll cage in for extra stiffness and a track style spoiler for increased down-force achieving total topic irrelevance.
    :applaus:
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  34. dualmono21
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    dualmono21 Well-Known Member

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    suspension parts may have the concept but you do not adjust them in the same way on a 2wd car than you do on a 4wd car to attain a better handling car
    which is exactly what ive tried explaining all along

    lift off over steer is a phenomenon mostly associated but not exclusively to 2wd fwd cars
    if you want a 4wd car to go quick through a corner you unbalance the car BEFORE you go into the corner not DURING
    otherwise your likely to see the nearest lamppost
    #34
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  35. quattrojames
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    Or the nearest magistrate...
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  36. adamss24
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    adamss24 Well-Known Member

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    I would advise doing it with the ESP off ! FWD with sorted suspension and rs4 ARB will handle very well in the dry, however you will find the limits rather quick in the wet... The ABS/ESP is very intrusive on b6 platforms and cannot be turned off entirely, if you drive enthusiastically then getting a b6 is a bad choice, a sorted b5 quattro is a much, much better contender !
    #36
  37. dualmono21
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    dualmono21 Well-Known Member

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    yes
    it is a little intrusive im afraid but switching off does help especially round the track
    #37

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