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Thread: Uprated ARBs.

  1. #26
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    One front and two rears for me =)
    best regards

    David
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    Alfa Romeo 155 Q4 -93 Nero "BTCC"
    Alfa Romeo 155 Q4 -94 Rosso

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    I'll add you onto the list Dave.

    Can I just ask all of you who have expressed an interest in the ARBs to keep an eye on the thread. I just want to make sure we can progress things reasonably quickly once the manufacturing has been agreed.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

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    1 front + 1 rear for me, please.

    I will wait too for the prices, thank you.

    Cris
    Alfa Romeo 155 Q4 WB '95
    Alfa Romeo per sempre !

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    Id like one front and one rear as well!
    Cheers
    /Anders

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    Shouldn't we have 30mm? i rather have 30

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    I agree with Jan, the thicker the better as I intend to use my car on trackdays and "active driving" to and from.. Understand It might get a little stiff on rainy days but a price I can pay for that wicked feeling of unlimited grip and power durin g corners without sliding out..
    best regards

    David
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    Alfa Romeo 155 Q4 -93 Nero "BTCC"
    Alfa Romeo 155 Q4 -94 Rosso

  7. #32
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    I'll give Pedders a prod to see if 30mm bars are a possibility. The best result would be that we get a choice of bar diameter.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  8. #33
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    30 mm sounds good I guess.
    Maybe they can give some advise on this?
    In a world full of compromise...
    ...some don't.
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    Alfa 147 1.6 16V 120HP
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    I never have been on a race track so far - therefore I am not experienced regarding this topic. But in Fiat coupe forum meanwhile there are some "experienced" people reducing their thick front arbs again?!
    For example this (there are more threads with this topic in this forum):
    http://www.fccuk.org/forum/ubbthread...1374976&page=1
    As I stated - I am not experienced - but problems of Fiat coupe should be similar to the Alfa 155 problems - it's the same underfloor and almost same suspension.
    Juergen

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    They talk about rear arb's!
    24mm for rear is nice because it's also heavy at the back and 4wd!

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    Sorry, I meant this comment ..."Note that I don't run an uprated front ARB - this just promotes understeer, so I sold the Dedra ARB and reverted to standard" - and there are more of these comments in other threads of Fiat Coupe Forum.
    Juergen

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    We are going to have to wait for the answers from Pedders, at the moment the guy who is looking after all the details is away in China.

    Sorry for the delay, but hopefully we should get some more details through soon.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  13. #38
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    Just heard back from Pedders, the front bar can be done in 26,27,28 or 30mm.

    Obviously it would be best if we only put the order in for a couple of sizes, so what sizes are people interested in?

    He thinks the rears can be done in the same sizes as well, so please let me know what you would prefer front and rear.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

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    28mm front and 26mm rear please
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    Will build alfa 155 or 145 into 20vt or 16vt or diesel's or selepeed's pm me

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    24mm rear, please.

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    Interested!

    I'd like the rear stiffer and some compliance left at the front..... so would like either a rear, or maybe front and rear, but with the rear more uprated.

    What are the diameters of the standard parts?

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    Are you getting these from Pedders in Australia? Whiteline is generaly more popular and better respected for competition suspension parts. They stock 22 and 24mm rear bars. I've seen a few fitted to Tipos and Coupes. Iv'e never thought about uprating the front bar. What are you guys trying to achieve with the front bar?

    If they come at a decent discount I'm keen on a rear bar 24mm. We should ask if they can do 24mm brackets too as the original ones don't fit on anything larger than 22mm.

  18. #43
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    For fast road/track day I think that is better a more thick rear arb in proportion to the front. With too much thick front arb the car tends to understeer....

  19. #44
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    Quote Originally Posted by SteveNZ View Post
    Are you getting these from Pedders in Australia? Whiteline is generaly more popular and better respected for competition suspension parts. They stock 22 and 24mm rear bars. I've seen a few fitted to Tipos and Coupes. Iv'e never thought about uprating the front bar. What are you guys trying to achieve with the front bar?

    If they come at a decent discount I'm keen on a rear bar 24mm. We should ask if they can do 24mm brackets too as the original ones don't fit on anything larger than 22mm.
    The problem is that the Q4 ARBs are different to the regular 155 ones, both front and rear have got humps in them to clear the propshaft \ rear diff. The whileline ones listed are for all 155s excluding the Q4.

    As far as I'm aware the Q4 only shares the ARBs with the Lancia Dedra Integrale, which curiously has a slightly thicker front ARB.

    When the Dedra ARB is fitted to the Q4 along with a strut brace, it really tightens up the front end of the car, giving a more positive turn in.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  20. #45
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    Does the Q4 bars fit all the models then?

    Are you not woried about understeer? I like to add a larger rear bar, just to make it more neutral. I have tried everything from a 16mm to a 24mm in a Tipo and even with the 24mm it will still tend to understeer in the dry.

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    Interesting! Although I'm a bit lost as to the measures and the reaction of Q4.

  22. #47
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    Personally, and this is only in my limited experience, the whole 155\Tipo\Dedra monocoque just doesn't have the torsional rigidity to apply the normal handling formula.
    I can't be the only one to have worried when they've jacked up one side the front of the car and then tried to open the door.
    All I can say is that when I stiffened up the front with a Dedra ARB and a strut brace, and then added a little more toe in, the front end of the car felt much more controlled, gave more confidence when turning in and seemed to grip better. The Dedra ARB is only slightly thicker than the Q4 one, so an even thicker one might help more or it might not.

    If you compare the front setup of the 155 to the rear, the rear is by design a much better starting point to hang suspension from as its all hung from the one subframe, and the subframe is pretty beefy to start with.

    Just my 2p worth.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  23. #48
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    Quote Originally Posted by Steve Webb View Post
    I can't be the only one to have worried when they've jacked up one side the front of the car and then tried to open the door.
    My dad always finds this a laughing point when I am working on my car

  24. #49
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    Quote Originally Posted by Steve Webb View Post
    Personally, and this is only in my limited experience, the whole 155TipoDedra monocoque just doesn't have the torsional rigidity to apply the normal handling formula.
    I can't be the only one to have worried when they've jacked up one side the front of the car and then tried to open the door.
    All I can say is that when I stiffened up the front with a Dedra ARB and a strut brace, and then added a little more toe in, the front end of the car felt much more controlled, gave more confidence when turning in and seemed to grip better. The Dedra ARB is only slightly thicker than the Q4 one, so an even thicker one might help more or it might not.

    If you compare the front setup of the 155 to the rear, the rear is by design a much better starting point to hang suspension from as its all hung from the one subframe, and the subframe is pretty beefy to start with.

    Just my 2p worth.

    persuasive


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    Sorry I don't understand how much thicker are the OEM arb...

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