Quattro GmbH suspension Installed

[don]

What you need to fit is YTX from the schedule above, it

I agree, for people who are concerned with bottoming out, then the anti-roll bar upgrade is the way to go. The OEM spring and damper setting seems reasonably good to me and I like the current height.

So excactly what is YTX from the schedule above? Front and rear stabalizers?

I'd still be interested to know how uprated the quattro gmbh anti-roll bars are? This would allow comparison with other bar manufacturers, if there is any other options, such as Eibach or H&R or even a local custom build? I mean how hard can it be to design/build these bars, as long as you have the correct specifications and balance.

[Nordschleife]

What you need to fit is YTX from the schedule above, it

I agree, for people who are concerned with bottoming out, then the anti-roll bar upgrade is the way to go. The OEM spring and damper setting seems reasonably good to me and I like the current height.

So excactly what is YTX from the schedule above? Front and rear stabalizers?

I'd still be interested to know how uprated the quattro gmbh anti-roll bars are? This would allow comparison with other bar manufacturers, if there is any other options, such as Eibach or H&R or even a local custom build? I mean how hard can it be to design/build these bars, as long as you have the correct specifications and balance.

YTX is the rear stabiliser.

By all means experiment with your own ARB, but have you 6 months and deep pockets? As it happened, quattro GmbH worked with one of the suppliers you mention to develop the rear ARB.

And it is quite hard to develop an ARB that does a better job than the specialists do from scratch if you don't have access to their database. Having the correct specifications and balance is the difficult bit!

R+C

[don]

thanks very much for the info..

quattro GmbH worked with one of the suppliers you mention to develop the rear ARB

I thought it was normal to up rate both front and rear stabalizers to maintain balance? I assume just changing the rear is aimed at reducing understeer?

I notice H&R provide a stabalizer kit for the RS4:

33372-1 Audi S4/RS4 B5, Lim. + Avant, 4WD
VA 33 372VA, ø 32 mm / HA 33 372HA, ø 17 mm

Although they appear to quote two bars. Do you know how these bars compare to the quattro Gmbh set up? Are they the same bar?

[Nordschleife]

As i mentioned in an earlier post, just fitting the rear quattro GmbH anti-roll bar dramatically improves the handling.
Off the top of my head, the quattro option is a 19mm rear bar. But note H&R's kit is 32mm in front 17mm behind, there is a deliberate difference, the 19mm obviously suits the stock ARB in the front.
As production methods and materials differ, its not reasonable simply to compare ARB thicknesses.

As a general rule, I prefer to get my springs and shocks sorted, then adjust the ARBs, revisiting the springs and sshocks if required. Its an iterative process.
Some people have had a great deal of success fitting Ohlins race shocks to the RS4, they are so adjustable you can soften them up enough for the road.

R+C