Anti-Roll Bar

[smudge 1020]

Finally got my hands on some adjustable drop links so have been looking into ARB's also

What are people's recommendations?

[Special K 442]

None from me, Smudge - I am still running standard.

 

I recall that a person over on the dark side tried various thicker rear rollbars... I think he finally sold 'em.

 

Spec K

[Lauren 2259]

I don't know many people that tried them, someone did though, trying to recall who it was. Said it limited traction, so maybe not the way to go. 

[Ade 517]

Stu tried various different thichness rear roll bars but on a stock suspension setup. He settled on the 16mm roll bar (14mm is stock) to redcue understeer. Unfortunately his blog is closed, otherwise I could link the videos he did. 

 

Roll bars and spring rates both affect the balance of the car (sorry to state the obvious).

 

I would suggest the 6kg front (+260% stiffer than stock) and 4kg rear (only 8% firmer than stock) of the HKS kit is the reason you have understeer.

 

You need to balance the rates out before trying to stiffen the rear roll bar to decrease understeer.

[Mark@Abbey M/S 235]

or the added BHP from the SC fitment;

 

If you runt he car to stiff on spring rates your loose traction stiffening the car just in roll will keep the traction but gain stiffness.

 

We fit a rear bar in our Stage 1 suspension kit 16mm , cures the understeer these cars seem to have built in them;

 

Running a big rear bar could cause traction issues thou I do agree.

[smudge 1020]

So a 16mm on the rear would be the way to go then, and leave the front standard?

[Keethos 842]

What if you already have quite stiff spring rates i.e. 9/7kg, would having a thicker anti roll bar be ill advised?

[Mark@Abbey M/S 235]

Keethos , those springs are miles to hard in my opinion. Roll bars will make no difference

[Quixote 35]

I have Abbey's Stage 1 on my car and with the 18s and decent rubber, there was a massive improvement in turn in and confidence through the bends (especially on the B & unmarked roads I like to play on)

 

Back on my winters now and I'm sliding a lot, but maybe something to do with the amount of abuse the decent rubber could handle in combination with this setup (and decent alignment courtesy of Abbey).

[Lauren 2259]

I find my car goes all over the place, with winters on in comparison to the 225 Advans I had on during the summer. I think my more aggressive geo over stock contributes. But, what I've realised, is that it's way more fun, so I'm not going to put the Advans back on. Back to Primacy's for me when spring comes around.

 

I think you can also dial out the inherent understeer with a geo setup that has more camber and less toe in on the rear. I don't think I need thicker ARB's on my car as the balance is where I want it already. 

[Quixote 35]

I find my car goes all over the place, with winters on in comparison to the 225 Advans I had on during the summer. I think my more aggressive geo over stock contributes. But, what I've realised, is that it's way more fun, so I'm not going to put the Advans back on. Back to Primacy's for me when spring comes around.

 

I think you can also dial out the inherent understeer with a geo setup that has more camber and less toe in on the rear. I don't think I need thicker ARB's on my car as the balance is where I want it already. 

 

This is why I think the car is great! We all like different things and we can get what we want out of it with very little £££ outlay!

[Mark@Abbey M/S 235]

Yes car needs just a slightly rear bar to cure the mild understeer these cars suffer.

[smudge 1020]

Cheers Mark

[GT86Jay 202]

I think I recall GPRM saying they still use the stock Anti roll bar on their cars. 

 

They hadn't yet seen the need to upgrade. 

[Mark@Abbey M/S 235]

Jay

 

sorry but it isnt a simple as saying they don't need to upgrade the rear bar

 

do you think GPRM are running a suspension system like ours , they are running slicks so roll centres and all other angles will be changed. There damper set up will be 3 way adjustable so Low speed and High speed bimp adjustment and rebound they might even have 4 way with low and high speed rebound. On our 350Z race car we tune the roll of the car on the Low speed bump adjustment. Our car runs without a front roll bar to add to cure understeer we see with our car.

 

 

We have done a lot of development using our own Car and we find the rear roll bar upgrade works very well and customers have backed this up on this thread.

[Deacon 1357]

What brand bar do you use / recommend Mark?

[Mark@Abbey M/S 235]

We use a Whiteline or a Super Pro roll bar but in a lot that comes with stiffness for the roll bar brackets.

We carry a Whiteline Roll Bar kit in stock.

[hashiriya 52]

I would recommend to run a little bit of rake on the car and the car feels much more alive. worth trying before investing in new roll bars and you could also get them if that doesn't make a difference. 

[Mark@Abbey M/S 235]

We are talking mostly about stock cars here Maz but I do agree a little rack will help these car handling wise if your running adjustable coil overs.