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Rear swaybar LX borgwarner


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#1 JJ21

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Posted 25 August 2021 - 11:15 AM

Hello all,

Can someone please inform ne the best way to go for rear swaybar on LX sedan with BW diff conversion.
The original swaybar (77 RTS SLR) fouls on the diff centre cover when trying to mount in original lower trailing arm points.

I reckon i could redrill mounting holes in the arms to bring swaybar back slightly but as these arent the best from factory is there a better optiom??
Thanks in advance

#2 Heath

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Posted 25 August 2021 - 11:41 AM

The more efficient swaybar design is actually what a UC Torana has. It is a smaller bar that acts directly on the floorpan and axle tubes... this is what basically every conventional live axle car has.

The standard LX SLR rear swaybar is that really weird design where it goes from one arm to another, and that's why it has to be so thick to do anything. Shit design lol.

 

If you're happy to add some swaybar mounts to your floorpan, you can install a UC style one (but really it could be from a different model of car, I think you can actually run a Commodore one without welding any brackets on but I could be wrong) 

Ea09O7C.jpg

 

This thread below shows one that uses the standard upper arms as upper swaybar mounts... cool! No welding on the floor in that instance.

http://www.gmh-toran...-rear-sway-bar/

Although I personally don't like the look of the 'clamp-on' swaybar mounts on the axle tubes. They work but they're pretty ugly.

The BW diff probably would have had some kind of swaybar mounts underneath, unless they were cut off during the diff conversion.



#3 Peter UC

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Posted 25 August 2021 - 01:01 PM

Or you could just not run one. I've tried mine with and without back to back on the track and I just find it's less likely to lift the inside rear wheel with the sway bar. Times were also slightly faster without and was easier to drive.



#4 76lxhatch

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Posted 25 August 2021 - 01:37 PM

Mine is a Commodore one, I straightened the ends in the press and just mounted the links to the upper arm mounts (forward of the arm pivots so plenty of clearance).

 

dscn0030.jpg

 

Gives you a choice of 12, 14, 16, 18mm bars for next to nothing.



#5 claysummers

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Posted 25 August 2021 - 02:35 PM

I fitted an XK to XC Ford Whiteline bar to my LC rear axle in FB ute recently. I compared it to a UC rear bar that I have and it is essentially the same shape, other than around the diff pumpkin. The Ford diffs must have the pinion centred, with the crownwheel offset so the allowance in the bar is correspondingly offset, but it isnf reslly noticeable. A friend fitted the same Whiteline bar to a 9" in his EK sedan.

The UC bar is only about 13mm, whereas the Whiteline is more like 18mm. I welded mounts to the housing and chassis rails inside. My poi t is that if the UC bar gits then so will the Ford one.

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#6 dattoman

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Posted 25 August 2021 - 09:37 PM

Mine is a Commodore one, I straightened the ends in the press and just mounted the links to the upper arm mounts (forward of the arm pivots so plenty of clearance).

 

dscn0030.jpg

 

Gives you a choice of 12, 14, 16, 18mm bars for next to nothing.

 

Which Commodore ?



#7 76lxhatch

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Posted 26 August 2021 - 05:41 AM

VB-VP (probably VR-VS also) live axle are all the same as far as I know, just varying diameter. Find an earlier car for thinner ones, VN/VP definitely have the 18mm option. Not sure how they decided which sub-models got what, some of the chunkiest bars I've seen were on four cylinder cars



#8 JJ21

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Posted 27 August 2021 - 02:20 AM

Thanks for replies guys...
So am thinking that the commodore swaybar as per the last pic would be the go, even if need to use clamps.
Now just to findout which Commy bar is best to use

#9 S pack

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Posted 27 August 2021 - 06:54 AM

The more efficient swaybar design is actually what a UC Torana has. It is a smaller bar that acts directly on the floorpan and axle tubes... this is what basically every conventional live axle car has.

The standard LX SLR rear swaybar is that really weird design where it goes from one arm to another, and that's why it has to be so thick to do anything. Shit design lol.

The LH/LX 8VD have a rear anti-sway bar.

The UC Torana has a rear anti-roll bar.

Different animals for different outcomes.
 



#10 claysummers

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Posted 27 August 2021 - 07:48 AM

Elaborate Dave?

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#11 S pack

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Posted 27 August 2021 - 08:12 AM

Elaborate Dave?

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Anti-sway bars do not have links connecting the stabilizer bar to the body of the vehicle, therefore they have little to no control over body roll, anti-roll bars do.
 



#12 claysummers

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Posted 27 August 2021 - 08:19 AM

Anti sway bars are useless in other words

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#13 S pack

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Posted 27 August 2021 - 08:40 AM

Anti-sway bars are not useless, they still improve the handling characteristics of the vehicle. Anti-roll bars are just better, that's why most teams ditched the front anti-sway bars on their XU1's under group C rules in 1973 and installed anti-roll bars.

Edited by S pack, 27 August 2021 - 08:40 AM.


#14 claysummers

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Posted 27 August 2021 - 09:03 AM



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#15 bat 53

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Posted 05 September 2021 - 10:40 AM

after doing bw diff conversions in early holdens ,

i would reshape the sway bar to suit ,then have it rehardened






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