found a ARB from a dedra integrale at last (24mm). I now need to kvow the thickness of the original alfa 155 Q4 front ARB so I?m sure to get the right one
found a ARB from a dedra integrale at last (24mm). I now need to kvow the thickness of the original alfa 155 Q4 front ARB so I?m sure to get the right one
I can measure it later on as my car is up on axle stands at the moment.
1993 Alfa Romeo 155 Q4 , 2.0 Turbo
I thought the Q4 ARB was 22mm, I've got a dedra ARB one on my car as its a quick and easy upgrade.
Fit a strut brace and Dedra integrale ARB and the front end of the car feels much more positive.
Steve
1994 Alfa Romeo 155 Q4: Dozeing in the garage.
2009 Audi A4 tdi: Everyday drive.1994 Alfa Romeo 155 , 1995cc Std Standard Black
narrow body is 23mm and wide body is 22mm. Just measured both.
1 or 2 mm of difference wont give you such an improvement, I believe.
@ Steve
which is the dia from the front ARB you use? Are all the Grale's ARB {16V - Evo1 - Evo2} with the same dia?
Nick
Remember that the stiffness of the ARB is going to depend on the cross sectional area, so seemingly small increases in diameter are going to cause larger % increases in stiffness.
22mm diameter cross section = 22/7 * 22? (pi x r?) = 1520mm?
24mm diameter = 22/7 * 24? = 1810mm?
1810/1520 = 1.19
The 24mm diameter ARB offers an approx 20% increase in stiffness over the 22mm ARB
A little simplified but thats the general gist of it.
And the 24mm ARB is from a Dedra Integrale not a Delta Integrale.
1994 Alfa Romeo 155 Q4: Dozeing in the garage.
2009 Audi A4 tdi: Everyday drive.1994 Alfa Romeo 155 , 1995cc Std Standard Black
Thanks Steve,
is the Dedra's Integrale front ARB a direct replacement?
Nick
My Q4 in the Garage
www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk
Eibachs and whiteline are *really* stiff so you should be doing just fine with 26mm. Be aware that the balance between front and rear (over- and understeer) is partially controlled with the balance between the ARBs. If you put a stiffer rear ARB on, you'll get more grip on the front and vice versa. Just changing the front will make the car even more going into oversteer than it does now, so you might want to make some different sizes for the rear to get the balance right. (I'm assuming the rear ARB is more easy to swap out here)
I have now given up having made a custom front ARB so I am going to use the one from an dedra Integrale.
Q: the weelbase of the widebody is 2 cm longer than my narrowbody. how can I be sure that the arb from the dedra fits?
all suspension parts are shared between the widebody and narrowbody cars, the difference in trackwidth is due to a different offset on the wheels (ET = Einpress Tiefe or something very similar), the arbs excepted and possibly dampers excepted. But even those are interchangeable.
The wheelbase is the same for all 155's IMO, 100" or 2.54m
Yes, as far as I know the extra track is just the wheel offset and 5mm spacers!
wrinx
My Q4 in the Garage
www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk
Suspension arms at the back definitaly not interchangable between sb and wb!
I once damaged one and the one i bought turned out to be a sb one.
wich is shorter... So the rear wheel came very much inside on the botom part.
well, whaddaya know... did the arb fit the sb arm?
Sorry, I was only talking about the front wheels...they were definitely fitted with 5mm spacers from the factory, in fact they can still be bought from Alfa.
Rear wheels are a bit unknown...some reports that cars had spacers on all four wheels, some say not.
wrinx
My Q4 in the Garage
www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk
On mine are missing both front and rear and with Speedline rims is quite ugly - mostly for the rear wheels.
Nick.
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