Sway Bar Upgrade Needed?

[V28VX37]

How is this set up for you?

Yep I'm happy with it, it feels controlled and predictable on the track and compliant enough on the street.

I ran the same coilover+swaybar setup with softer 6kg/5kg springs in street use only originally. It was great but once I took it to the track it was a bit rolly in the corners so decided to go stiffers springs - the BC's normally come with 8/6. Surprisingly there wasn't much difference in ride quality really .

One thing to note about the ARC swaybars is that AFAIK they are hollow whereas the OEMs are solid, so the difference in stiffness is not quite as radical as it might look based on the diameter.

[yoshiii335]

Yoshii, we can't tell you what sizes to get.

The ARBs affect the balance of the car (under-over steer balance that is). How much you need at the front and rear depends on the inherent balance from your actual springs and dampers, coupled with your own preference. If oversteer frightens you then you would be well advised to keep the rear bar smaller than the front. But if perchance you have much stiffer front springs than your rear, then the same size ARBs at both ends might still be non-oversteery. Impossible to advise you precisely.

I have 24mm adjustables at both ends. Front set to hard, rear set to soft. That's pretty stiff, although it is possible to go a fair bit stiffer. The front stiffness aids turn in response, but does reduce grip in the wet! The rear stiffness tends to make my car quite willing to get the tail out. This is with 5+kg springs at the front and 3ish kg at the rear, with SK modified Bilstein B6s.

How are you getting such low spring rates? Most of the coilovers I find in Japan for the car has a minimal of 8 for the front and 6 for the rear.

[bcozican]

As above the both sides situation

This is for track in r32 gtst

Ive always been in camp 2 - 8kg Front 6 rear with 27mm front sway and 24 mm rear sway - then moved to 7kg front and 4kg rear with same larger sways

now.... tomorrow is my first trial in Camp 1... 11kg front with 5kg rear and back to standard sways - cant say im not nervous about it but hey MCA do know what they are talking about so I'll listen... for now

[niZmO_Man]

Why bother looking at Japan for suspension when locals like MCA have great products?

Unless you're in Japan of course.

[iruvyouskyrine]

He is in Japan

[GTSBoy]

How are you getting such low spring rates? Most of the coilovers I find in Japan for the car has a minimal of 8 for the front and 6 for the rear.

I'm not using coilovers. Bilstein B6s, as I posted earlier.

[GTSBoy]

How are you getting such low spring rates? Most of the coilovers I find in Japan for the car has a minimal of 8 for the front and 6 for the rear.

And on top of that....it is possible to buy pretty much any spring you want to suit a coilover. 200mm free length? No problem. 230? Yup. 260? Sure! 2kg/mm? Certainly, Sir. 14 kg/mm? Yes, would you like it painted yellow or blue?

[d.matho]

Im running the whiteline BNK010 kit on my r34 and the car is so much better than just having coilovers, no body roll and the car feel really direct and sharp. I'm pretty sure the kit is a 24mm front with 22mm rear.

[djr81]

Yep I'm happy with it, it feels controlled and predictable on the track and compliant enough on the street.

I ran the same coilover+swaybar setup with softer 6kg/5kg springs in street use only originally. It was great but once I took it to the track it was a bit rolly in the corners so decided to go stiffers springs - the BC's normally come with 8/6. Surprisingly there wasn't much difference in ride quality really .

One thing to note about the ARC swaybars is that AFAIK they are hollow whereas the OEMs are solid, so the difference in stiffness is not quite as radical as it might look based on the diameter.

OEM are hollow.

[Missileman]

Cusco did make ARBs many moons ago, they were supposedly very good, so if you can find them on yahoo they might be worth consideration, they are hollow too so weigh less than the solid whiteline equivalent.

[KiwiRS4T]

Hollow is not a plus - its the amount of steel that counts.

[GTSBoy]

Hollow is a plus in that the bar will be lighter than an equivalently stiff solid bar. Bigger diameter, but lighter.

Stiffness is a function of the 4th power of diameter. So the bit of steel near the centre of the bar does relatively nothing for stiffness compared to the bit of steel out near the edge. So if you can make it hollow it will be lighter. If you make it solid at the same diameter as the hollow bar, it will be a little stiffer. Most aftermarket crowds don't make hollow bars because it is harder to get the raw stock and they are more difficult to form.

[V28VX37]

Hollow is a plus in that the bar will be lighter than an equivalently stiff solid bar. Bigger diameter, but lighter.

Stiffness is a function of the 4th power of diameter. So the bit of steel near the centre of the bar does relatively nothing for stiffness compared to the bit of steel out near the edge. So if you can make it hollow it will be lighter. If you make it solid at the same diameter as the hollow bar, it will be a little stiffer. Most aftermarket crowds don't make hollow bars because it is harder to get the raw stock and they are more difficult to form.

Spot on. That's why I jumped on the ARCs, rare items.