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#1059463 - 10/17/18 09:56 PM Question about rear sway bar with a 12 bolt  
Joined: Aug 2014
Posts: 205
Keithss Offline
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Keithss  Offline
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Joined: Aug 2014
Posts: 205
Jackson,mi
As I stated in an earlier post, I have a new Moser 12 bolt to put in my 85SS.
My question is from anyone that has done it, will the rear sway bar still fit or does it hit the pig?
If it hits, has anyone came up with a work around?
I also assume that the drive shaft will need to be shortened.
Keith

I used to post pictures of my progress a year ago or so. There must have been a change on how to post pictures as I have a problem

#1059465 - 10/17/18 10:08 PM Re: Question about rear sway bar with a 12 bolt [Re: Keithss]  
Joined: Mar 2012
Posts: 680
MC96 Offline
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MC96  Offline
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St. Johns MI
Good to see youre still around Keith.

Im not entirely sure but I believe Ramey could answer your question @ UMI. hes good with even the stock stuff.


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress
#1059578 - 10/25/18 06:01 PM Re: Question about rear sway bar with a 12 bolt [Re: Keithss]  
Joined: Jul 2001
Posts: 4,484
Joe87monteSS Offline
15+ Year
Joe87monteSS  Offline
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Posts: 4,484
Memphis,TN
I built a factory style 12 bolt in my car with a Moser girdle cover. I installed a Hellwig Pro Touring style bar on mine. The U bolts that clamp the bar onto the axle tubes had to be rotated back so the bar could clear the cover. Thats about it.


Joey
Engine/head builder/machinist
1987 Monte Carlo SS 383/4 Speed
2004 Silverado
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#1059744 - 11/08/18 04:21 AM Re: Question about rear sway bar with a 12 bolt [Re: Keithss]  
Joined: Jan 2000
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mmc427ss Offline
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mmc427ss  Offline
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Pottstown, Pa
Keith can't answer the question of whether a stock SS sway bar would clear the 12 bolt center section on your new Moser or not. One of the variables would be which hole you use for the LCA, the lower you go the more clearance at the centersection.

Anytime you install a different rear or sway bar you need to check the bar to centersection clearance with the rear springs out of the car. Support the rear in the center and allow it to drop to full droop, hanging on the shocks. Next raise the rear to full compression, usually the rear will hit the snubbers when fully compressed, sometimes the shocks will bottom out, not a good thing. While doing this full range of susp travel check the sway bar to centersection clearance.
With the stock SS bar this clearance may not be a issue.

If you decide to go with an aftermarket rear bar, particularly a link type bar you must check this clearance. With a link bar the dog leg in the bar will rotate, moves closer or move farther away from the centersection as the rear moves up or down. Some of the aftermarket link bars will be OK, others may not. The Hellwig may be OK, first hand I know the Spohn Pro Tour bar on an 8 1/2 is a problem. The 12 bolt is a little beefier in the centersection than.the 10 bolt.

What your intention is for the car helps determine which rear bar setup you go with. Many bar choices out there. Keep in mind that a sway bar bolted to the LCA is a very ineffective bar, very little rate can be got without going to a huge bar. Today the adjustable link bar is the way to go for street or handling. The huge, 1 3/8", 1 1/2" LCA mounted bars are for drag racing to reduce body/frame twist at launch.
Bob

#1059745 - 11/08/18 12:35 PM Re: Question about rear sway bar with a 12 bolt [Re: Keithss]  
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Posts: 205
Keithss Offline
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Keithss  Offline
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Joined: Aug 2014
Posts: 205
Jackson,mi
Thanks Bob
All very good information.
Mostly street use and show. I have been thinking about trying auto cross or something like that. Not sure if I ever will, but that is the direction of the set up so far.
I like drag racing and I might try it once, just to see what me time is, but that is not the direction I am going.
The new rear should be going in sometime within the next several weeks.
It came with no bump stops on it, not sure if this is going to be a problem or not.
The sway bar I am looking at is the UMI Performance 3/4 inch solid or the 1 inch tubular bars
Keith

#1059746 - 11/08/18 01:12 PM Re: Question about rear sway bar with a 12 bolt [Re: Keithss]  
Joined: Mar 2012
Posts: 680
MC96 Offline
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Posts: 680
St. Johns MI
With the UMI bar if it mounts like I remember with end links just twisting the links to rotate the bar up in the front should gain you clearance in the pumpkin area. Not ideal but it works.

Dont you have coil overs? Put some bumps on the shock shaft.


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress

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