R32 Rear ARB *my little review*

JonnyDerv

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I did a lot of reading on the R32 arbs before I took the plunge, some said it was one of the best handling mods you could do and some said it made the car feel skittish particularly at high speed. Some said you should fit the front one aswell. So hopefully this will help anyone currently or in the future considering fitting one.

I decided to go ahead and fit the rear one only and see what I thought. Fitted accompanying droplinks and some poly bushes.

I've taken it around roundabouts, twisty tight country roads, dual carriageways and around town to experience all elements of driving with it fitted.

Firstly it does make a difference. The car handles much much better than standard, it feels a lot more neutral through the corners, it feels a lot more agile and the steering feel seems to have improved. Regarding the skittishness, you can feel the back end a lot more when driving round bends, it feels much stiffer (as you'd probably expect) and you can feel it pushing wide if, you're pushing it. You can feel it sliding but that's only if you're actually provoking it, it's not gonna randomly spit you out like some threads I've read on the net.

Around town, it's great, turning into streets feels better, it's a big improvement. The apparent high speed skittishness was something I was most concerned about, I've drove on dual carriageways and I've not noticed this at all, it actually feels more better at road holding to me, steering feels more solid. I was given access to East Midlands airport's runway to test out high speed runs and at 120mph it was completely fine, I can only assume the people that complained of high speed instability had other issues with their handling, tracking out etc.

All in all it is well worth it, the front arb isn't needed at all, it will just reintroduce under steer. I'd recommend it to anyone who is considering it.
 
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Is this the stock rear arb and from which r32 the mk4 or mk5??
 
Good review. What's it like to fit? Removal of catback plus heatshield?
 
wish i hadn't of fitted the front r32 ARB but could always upgrade further (larger)
 
The questions begs to be asked, but don't the additional bits fitted (new droplinks and some poly bushes) have also a big part to play in the overall experience you had?
 
I did a lot of reading on the R32 arbs before I took the plunge, some said it was one of the best handling mods you could do and some said it made the car feel skittish particularly at high speed. Some said you should fit the front one aswell. So hopefully this will help anyone currently or in the future considering fitting one.

I decided to go ahead and fit the rear one only and see what I thought. Fitted accompanying droplinks and some poly bushes.

I've taken it around roundabouts, twisty tight country roads, dual carriageways and around town to experience all elements of driving with it fitted.

Firstly it does make a difference. The car handles much much better than standard, it feels a lot more neutral through the corners, it feels a lot more agile and the steering feel seems to have improved. Regarding the skittishness, you can feel the back end a lot more when driving round bends, it feels much stiffer (as you'd probably expect) and you can feel it pushing wide if, you're pushing it. You can feel it sliding but that's only if you're actually provoking it, it's not gonna randomly spit you out like some threads I've read on the net.

Around town, it's great, turning into streets feels better, it's a big improvement. The apparent high speed skittishness was something I was most concerned about, I've drove on dual carriageways and I've not noticed this at all, it actually feels more better at road holding to me, steering feels more solid. I was given access to East Midlands airport's runway to test out high speed runs and at 120mph it was completely fine, I can only assume the people that complained of high speed instability had other issues with their handling, tracking out etc.

All in all it is well worth it, the front arb isn't needed at all, it will just reintroduce under steer. I'd recommend it to anyone who is considering it.

You've missed some very important information in your review of fitting your R32 rear ARB, what suspension are you running, and what wheels are you running? I found the rear ARB mod on it's own made the car unstable during high speed braking, especially if the road was uneven. But 90% of the time, it's great! I did stick a uprated 21mm front ARB to balance things, which worked for me. I was also running Bilstein shocks, Apex lowering springs, FK lowering caps, 18" rims and 10mmF, 15mmR spacers.
 
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You've missed some very important information in your review of fitting your R32 rear ARB, what suspension are you running, and what wheels are you running? I found the rear ARB mod on it's own made the car unstable during high speed braking, especially if the road was uneven.

I'm completely standard, standard wheels, standard suspension. I've had no problems with high speed breaking at all, as I said, if anything it feels more secure like its holding the road better.

The questions begs to be asked, but don't the additional bits fitted (new droplinks and some poly bushes) have also a big part to play in the overall experience you had?

I'd imagine most people would opt for poly bushes whilst fitting and the drop links if theirs were knackered. Could it help explain the added stability at speed? It'd be interested to hear someone's opinion that has fitted the drops too


Good review. What's it like to fit? Removal of catback plus heatshield?

Didn't fit it myself as I had it done whilst having a host of things done oil sensor's, rods, cylinder head rebuild, manifold etc. I believe it's just the back box that has to be dropped rather than the whole cat back, heatshield and wheels I think.

Is this the stock rear arb and from which r32 the mk4 or mk5??

Mk4 one, to my knowledge the mk5 one won't fit.
 
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I had new drop links fitted a few months before I got my arb, the arb still made a huge difference
 
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I have R32 ARB's front and rear and feels so much better than when I ran just std ARB's.. .but... bare in mind handling is quite subjective both on a personal level and also on package setup...

What works for one person on 'a setup' may not work for a n other

And to clarify... we can only use Mk4 R32 ARB's :)

My setup for reference:
Bilstien B8 dampers
Apex -30mm springs
Silver Project camber plates
Fully poly bushed
Superpro caster adjust front bushes
R32 ARBs (23mmF, 19mmR)
KW tie bars

Front geo: -2deg camber, -9deg caster, zero toe
Rear geo: -1deg20mins camber, slight toe in

Feels ok to me but I am not a 'hard' driver

<tuffty/>
 
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I have R32 ARB's front and rear and feels so much better than when I ran just std ARB's.. .but... bare in mind handling is quite subjective both on a personal level and also on package setup...

What works for one person on 'a setup' may not work for a n other

And to clarify... we can only use Mk4 R32 ARB's :)

My setup for reference:
Bilstien B8 dampers
Apex -30mm springs
Silver Project camber plates
Fully poly bushed
Superpro caster adjust front bushes
R32 ARBs (23mmF, 19mmR)
KW tie bars

Front geo: -2deg camber, -9deg caster, zero toe
Rear geo: -1deg20mins camber, slight toe in

Feels ok to me but I am not a 'hard' driver

<tuffty/>

Tuffty did you ever run your car with a rear r32 bar only or did you up bith at the same time.
 
I'm about to install my r32 ARBs.

Am I correct in thinking this will increase the understeer a little? I'm guessing a new haldex controller (or LSD) would resolve the problem
 
It won't understeer more, stiffing up the back will encourage more oversteer. You going 23f 19r r32 arbs? So about the same ratio as standard just a lot stiffer. 21f 19r would be better balanced, having 19 all around feels great to me.
 
The understeer in these vehicles is not caused by ARB's, and IMHO is not best fixed by attempting to alter ARB F/R ratio's

Fix the understeer by correcting front wishbone geometry - and there are lots of solutions to fix this cookbot/defcon/superpro/etc offer options


I'm guessing a new haldex controller (or LSD) would resolve the problem

Not on their own

LSD enhanced understeer isn't rewarding
 
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Changing the Arb ratio does alter the understeer tendencies, my car produces a lot more back end activity with the stiffer rear bar, it's very noticeable.
 
Yes it does change understeer characteristics, but the understeer these cars suffer from was caused by alter front geometry

Therefore is best fixed by reversing the geometry setting VAG put on these to the original TT geometry setup

Trying to control body roll and oversteer/understeer with only ARB's is going to be a compromise
 
Making the rear stiffer and increasing oversteer properties doesnt magically improve front end grip.
I agree with snowy entirely with this.
Get the front end gripping properly is the real answer.
All you have done is made the rear more prone to slide
Well done!
Your losing grip!
 
Never said you did was voicing my own opinion.
Though now you have said that if it doesnt add grip whats the point??
 
Making the rear stiffer and increasing oversteer properties doesnt magically improve front end grip.
All you have done is made the rear more prone to slide
Well done!
Your losing grip!

Sounds as though you was implying that to me. I don't expect it to magically make it grip more, why would it? Thought that was obvious. The point is all the elements I've listed in my original post.
 
I didnt mean you specifically.
Generally.
I have an r32 bar and it feels better for sure.
But im more thinking its the feel of the car thats giving the driver more confidence.
And as ive said the front end grip is terrible without work.
 
Grip is achieved through stiffer bars up to a point as the loading on the tyre is and can be less, centre of gravity stays further within the base of the car. This is of course provided the grip of the tyres hasn't already been exceeded.
Too stiff though and the tyres aren't loaded properly and you do end up with less grip.

It's all speculative anyway, no one can know the specifics without proper scientific testing.

The yanks are experimenting with no front ARB and appropriately sprung shocks with good results. There's lots of options for different people.
 
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Totally agree its about balance Karl.
And i plan to do my own testing on track with arb set ups.
Wheres the info regarding no arbs mate?
Very interested to see that!
 
me too. Further correction can be no bad thing!

Couple those with spherical track rod ends and some work to correct bump steer and it could be a winner.
 
iv been running my 19mm r32 anti role bar for years now, made a great change back then. but I'm still running standered front anti role bar what would u guys say is best 21 mm or 23 mm to go with my set up,
kW Coilovers
LCR Cupar top mounts
19mm rear role bar
adjustable rear tie bars
4 wheel alignment done
all new track rod ends, ball joints, drop links.
 
also wanted to ask iv seen a few of u guys are running full poly bushed suspension, I use my car as a daily and really like to comfort over harshness will going full poly bushed make my car harsh or nice tight and comfy lol thx
 
also wanted to ask iv seen a few of u guys are running full poly bushed suspension, I use my car as a daily and really like to comfort over harshness will going full poly bushed make my car harsh or nice tight and comfy lol thx
I was running poly bushed front arms, 064 Motorsport solid subframe mounts, 21mm R32 ARB with oem bushes, and I didn't find it harsh on my S3.
 
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