DC2 Rear Sway Bar Guide

[coolhandluke]

For those wishing to refresh OEM bushings or upgrade, this can serve as a starting point.


OEM
1.) USDM 22mm
Rate: 292lbs/in | 5.2kg/mm
Weight: 8.4 lbs | 3.78 kg
Rear Sway Bar PN: 52300-ST7-Z01 (discontinued)
Rear Sway Bar bushings PN: 52315-ST7-Z01

2.) JDM 23mm
347lbs/in | 6.2kg/mm
Rear Sway Bar PN: 52300-ST7-Z11 (discontinued)
Rear Sway Bar Bushings: 52315-ST7-Z11

OEM Parts that work with both 22mm & 23mm:
-Bushing Holder: 52308-SS0-000 (2x)
-Bushing Holder Bolts: 93403-08020-08 (4x)
-End link (Complete): 52303-ST7-Z00 (2x)
-End link bushing: 52314-ST7-Z00 (2x) *Not required if purchasing complete
-End link bolt to RSB: 90175-ST7-Z00 (2x)
-End link bolt to RLCA: 90120-SB0-003 (2x)
-End link bolt to RCLA washer: 94103-10400 (2x)


Aftermarket - Static:
1.) Cusco 25mm
Rate: 406lbs/in
PN: 321311B25
Weight: 8.82lbs

1.) Eibach static 22mm
Rate: 423lbs/in | 7.6kb/mm
PN: 343954 / BWSC-0500
Weight: TBD

2.) Mugen static 26mm
Rate: TBD
Weight: TBD


Aftermarket - Adjustable:
1.) Eibach 25mm 3-way adjustable
-Position 1: 418lbs/in | 7.5kg/mm
-Position 2: 533lbs/in | 9.5kg/mm
-Position 3: 630lbs/in | 11.3kg/mm
PN: 354164 / 4086.320R

2.) ASR Redbar 25.4mm / 1''
Weight: Red bar weight: 7.0 lbs| 3.15 kg
Position 1: 418 lbs/in | 73 N/mm
Position 2: 533 lbs/in | 94 N/mm
Position 3: 630 lbs/in | 111 N/mm

3.) ASR 32mm Hollow 0.95''
Position 1: 503lbs/in | 9.0kg/mm
Position 2: 635lbs/in | 11.4kg/mm
Position 3: 740lbs/in | 13.2kg/mm
Position 4: 850lbs/in | 15.2kg/mm

4.) ASR 32mm Hollow 1.2''
Position 1: 643lbs/in | 11.5kg/mm
Position 2: 761lbs/in | 13.6kg/mm
Position 3: 828lbs/in | 14.8kg/mm
Position 4: 980lbs/in | 17.5kg/mm

5.) Progress 22mm
PN: 62.1041
Position 1: 310 lb/in
Position 2: 360 lb/in
Position 3: 410 lb/in


Known Issues
1.) ASR spherical endlinks in conjunction with HyTech Twinloop exhaust
-Scenario 1: Eibach 3-way adjustable rear sway bar, only clears on stiffest 3/3 setting
-Scenario 2: JDM 23mm rubs

Change log:
4/29/20 - Rev4
-Added Cusco 25mm RSB details
-Added JDM 23mm PN
-Added Known Issues section addressing ASR endlinks + HyTech TL issues
5/29/19 - Revision 3
-Added Progress PN
5/29/19 - Revision 2
-Added Mugen 26mm and Progress adjustable

WIP:
-Mugen 26mm weight and rates
-Eibach 22mm static weight

[RTW DC2R]

Do we want to talk about different sway bar settings and handling characteristics? Or is that part of the suspension tuning thread?

[coolhandluke]

Do we want to talk about different sway bar settings and handling characteristics? Or is that part of the suspension tuning thread?

Sharing "working or not working" information could be useful.

Example 1:
-Eibach 3-way adjustable sway bar + spherical endlinks will rub HyTech Twinloop exhaust without low profile endlink bolts.

[Dave7CDMTYPER]

That 32mm asr bar must be crazy, seems huge.

I put on the jdm 23mm rear bar on my gs-r, using the ASR subframe brace, and all new oem bushings, brackets, and bolts. Applying grease to rubber bushings (where rubber meets metal) is important to do. I'm very happy with it. But getting those new oem bushings and bolts adds to the cost.

I just installed a rear strut bar on my gs-r, and that seemed to link up my suspension and has made the whole car feel connected to itself, so this might be something to consider for those getting a bigger rear sway bar or looking to improve handling in this area.

[Xian]

IMO, the 0.95 wall ASR is pretty ideal for a street/autox/light track car. I had that on my 97R along with some DA Motons and loved every minute.

On the 32mm options, I checked out ASR’s site and they still list a 0.95, 0.120, 0.188, and 0.25 wall bar options. I know plenty of folks who run the 0.25 wall on dedicated wheel to wheel cars... seems to work fine with higher spring rates and sticky tires (Hoosiers).

Looking at the rates in Ryan’s post, I’m pretty sure those are single wheel (bump) rates vs double wheel (roll) rates. For those trying to compare the bar rates to spring rates, remember that the bar connects further toward the inside of the rear LCA. As a result, they provide a fair bit less in actual wheel rate than springs do. As we’ve discussed previously and on the old site, pay attention to wheel or total roll rate more than individual component rates.

[Chase_acura]

Great info Ryan, thanks for posting

[coolhandluke]

....For those trying to compare the bar rates to spring rates, remember that the bar connects further toward the inside of the rear LCA. As a result, they provide a fair bit less in actual wheel rate than springs do. As we’ve discussed previously and on the old site, pay attention to wheel or total roll rate more than individual component rates.

I appreciate you sharing knowledge.

[Xian]

....For those trying to compare the bar rates to spring rates, remember that the bar connects further toward the inside of the rear LCA. As a result, they provide a fair bit less in actual wheel rate than springs do. As we’ve discussed previously and on the old site, pay attention to wheel or total roll rate more than individual component rates.

I appreciate you sharing knowledge.

No worries dude. It’s all stuff we’ve spoken about in other threads/other places but bears repeating here for new readers.

FWIW and all that but getting past looking at X rate springs and Y size bar to where you’re looking at Z wheel rate is where you want to go (IMO). That way you’re always getting an accurate picture of what the wheels are seeing after accounting for the motion ratio... it’ll help you make reasonable and well thought out changes vs throwing darts.

[coolhandluke]

4/29/20 Change log:
-Added Cusco 25mm RSB details
-Added JDM 23mm PN
-Added Known Issues section addressing ASR endlinks + HyTech TL issues

[Insidiouseg6]

Great info in here!
I will add that using a JDM RSB with ASR spherical endlinks will also rub with the Hytech twinloop.