calling suspension gurus. Panhard bar Install?
Moderators: notoptoy, S Allen, Solex68
-
- Roadsteraholic
- Posts: 591
- Joined: Sun Jul 30, 2006 3:27 pm
- Location: Spring Valley, OH
calling suspension gurus. Panhard bar Install?
I'm thinking about making a bracket like this one for my RX7 rear end, and installing a panhard rod for more firm rear axle lateral location. I have volvo monoleafs, bilsteins, and the stock rear mounting bar. I'll be able to get about 15" on the panhard bar, and according to this video
, as long as I get it parallel to the rear even a short panhard bar should offer improvements. If I put in the panhard rod with the stock rear torque arm (is that what its called?) will I have any unintended negative consequences?
, as long as I get it parallel to the rear even a short panhard bar should offer improvements. If I put in the panhard rod with the stock rear torque arm (is that what its called?) will I have any unintended negative consequences?
You do not have the required permissions to view the files attached to this post.
- redroadster
- Roadsteraholic
- Posts: 2415
- Joined: Tue Mar 12, 2013 10:58 am
- Location: KCMO
- Model: 1500/1600
- Year: High Windshield-68-70
Re: calling suspension gurus. Panhard bar Install?
They are mostly for coil spring suspension -track bars
With No rubber bushing maybe noisy
If is raised like a bump ..it will shorten... thus pulling something
The frame ?
With No rubber bushing maybe noisy
If is raised like a bump ..it will shorten... thus pulling something
The frame ?
Datsun dealer tech 76 to 87
Mitsubishi tech 9 yrs
Volvo, Kia, Toyota too
6 month - Rolls Royce
ASE MASTER TECH 96. - 11
70 SPL 86 Z31 T , Sportster
Mitsubishi tech 9 yrs
Volvo, Kia, Toyota too
6 month - Rolls Royce
ASE MASTER TECH 96. - 11
70 SPL 86 Z31 T , Sportster
- Mattk
- Roadster Nut-Site Supporter
- Posts: 678
- Joined: Mon Oct 28, 2013 1:49 pm
- Location: DFW, TX
- Model: 2000
- Year: High Windshield-68-70
Re: calling suspension gurus. Panhard bar Install?
Pan hard bars are for locating the rear ended laterally, this is actually done by the leaf springs in a car with leaf springs. Adding a panhard bar in a setup with leaf springs can cause binding since the axel is now forced to move in a slight arc laterally by the panhard bar, which the leafs will not like at all. I would not recommend adding the panhard bar to your setup. In addition if the torque bar is left in it will only add to the binding of the rear end. Some of the ways the get a “more firm†location are to:
- go with sniffer bushing in the leaf to frame connections; may put undo stress on connections
- add diagonal control arms. Some good math involved
- go with a four bar parallel, with panhard bar and coil overs like Alvins, lots-o-work
- go with four bar triangulated with NO panhard bar and coil overs like mine. Lots-o-work
The last three will greatly improve the handling but again lots of math
Cheer
Matthew
MattK
-
- Roadsteraholic
- Posts: 591
- Joined: Sun Jul 30, 2006 3:27 pm
- Location: Spring Valley, OH
Re: calling suspension gurus. Panhard bar Install?
I know many leaf spring cars do upgrade to a Panhard bar, most noticably late 60s Mustangs. If I did go this route, I would be using the double adjustable bar from Ridetech:
https://www.ridetech.com/products/r-joi ... -link-bar/
Would it make a difference with the joints being able to articulate well in reducing any possible binding? What if I replaced the stock torque arm with a bar that was able to articulate also?
https://www.ridetech.com/products/r-joi ... -link-bar/
Would it make a difference with the joints being able to articulate well in reducing any possible binding? What if I replaced the stock torque arm with a bar that was able to articulate also?
- Mattk
- Roadster Nut-Site Supporter
- Posts: 678
- Joined: Mon Oct 28, 2013 1:49 pm
- Location: DFW, TX
- Model: 2000
- Year: High Windshield-68-70
Re: calling suspension gurus. Panhard bar Install?
I have never seen this done. I might try to reach out to the mustang guys and ask them. But I still don’t recommend it.
Nope. The binding occurs where the leafs connect to the frame, at the shackles. If your going to replace those joints you might as well go for the four bar.
Cheers
Matthew
MattK
-
- Roadsteraholic
- Posts: 591
- Joined: Sun Jul 30, 2006 3:27 pm
- Location: Spring Valley, OH
Re: calling suspension gurus. Panhard bar Install?
Matthew--thanks for the feedback.
EDIT: Matthew, et al, here is how/why the Mustang guys do it:
EDIT: Matthew, et al, here is how/why the Mustang guys do it:
Last edited by GoldHawg on Mon Mar 02, 2020 6:12 am, edited 1 time in total.
- redroadster
- Roadsteraholic
- Posts: 2415
- Joined: Tue Mar 12, 2013 10:58 am
- Location: KCMO
- Model: 1500/1600
- Year: High Windshield-68-70
Re: calling suspension gurus. Panhard bar Install?
It has to move 1/4 " or slightly more using tie rod ends ( no give = panhard)instead of rubber bushings back and forth. Bet it ends up breaking the frame channel . if your set on it use a bushinged track bar. 1st
Datsun dealer tech 76 to 87
Mitsubishi tech 9 yrs
Volvo, Kia, Toyota too
6 month - Rolls Royce
ASE MASTER TECH 96. - 11
70 SPL 86 Z31 T , Sportster
Mitsubishi tech 9 yrs
Volvo, Kia, Toyota too
6 month - Rolls Royce
ASE MASTER TECH 96. - 11
70 SPL 86 Z31 T , Sportster
- RCMike
- Roadsteraholic
- Posts: 2460
- Joined: Tue Mar 13, 2012 12:58 pm
- Location: Pomona, CA
Re: calling suspension gurus. Panhard bar Install?
That may be the job of the leaf springs, but they do NOT do a very good job of it... In this particular car, the body does the locating, on the sidewalls of the rear tires. The leafs let the axle flex side to side like crazy.charlee0620 wrote: ↑Sun Feb 23, 2020 7:39 pmPan hard bars are for locating the rear ended laterally, this is actually done by the leaf springs in a car with leaf springs.
.
Rock at one point did have a Panhard, although it was later abandoned for the V bar design. The V bar works beautifully with the leafs, and maintains the axle position.
-
- Roadsteraholic
- Posts: 591
- Joined: Sun Jul 30, 2006 3:27 pm
- Location: Spring Valley, OH
Re: calling suspension gurus. Panhard bar Install?
Got a pic of how you did the v-bar? I can still do anything as I haven't powdercoated the frame and basically the rear suspension is in place. Anything I might ever want to do I'd like to do in the next few months. I'm happy with what I've heard from the volvo mono-leafs and the bilsteins re ride quality. If I can do anything to add to that to make the rear more stable that will still fit, I'd like to fab that up now.
EDIT: Just looking thru your thread, found it.
EDIT: Just looking thru your thread, found it.
You do not have the required permissions to view the files attached to this post.
- RCMike
- Roadsteraholic
- Posts: 2460
- Joined: Tue Mar 13, 2012 12:58 pm
- Location: Pomona, CA
Re: calling suspension gurus. Panhard bar Install?
That is it. The front spring mounts had a third plate installed and drilled, so the bolt goes through the spring and the bar, then the nut holds it together. At the rear, the rectangle tube has a captured nut welded in, then welded to the bottom of the axle housing. The bar is bolted in from the bottom. It makes for a very nice compliant rear end, that does NOT move from side to side..
- spyder
- Roadster Fanatic-Site Supporter
- Posts: 2207
- Joined: Tue Apr 12, 2005 1:43 am
- Location: Live Oak, TX.
- Model: 2000
- Year: High Windshield-68-70
Re: calling suspension gurus. Panhard bar Install?
It looks like the V-bar setup would have no anti squat in it.
- Gregs672000
- Roadster Fanatic-Site Supporter
- Posts: 9011
- Joined: Fri Aug 07, 2009 11:47 pm
- Location: Tacoma, WA
Re: calling suspension gurus. Panhard bar Install?
Long ago, I "imagined" or visualized exactly what RCMike has shown. I don't know $@#% about suspension etc, but I remember thinking that something like a Y bar would work, and there it is! Seems much less complicated than doing a pan hard rod, with a lot less fab and welding. I think I need one.
Greg Burrows
'67 2000 #588
Tacoma, WA
'67 2000 #588
Tacoma, WA
-
- Roadsteraholic
- Posts: 591
- Joined: Sun Jul 30, 2006 3:27 pm
- Location: Spring Valley, OH
Re: calling suspension gurus. Panhard bar Install?
Actually I think making a panhard rod is easier. I also went out to my car and the muffler is in the way of the left hand forward bar. And I don't think I want it hanging that low, and I can't see how to get it higher. Any idea how much up/down travel on the rear end? By my calculations if I have a 16" panhard rod, the arc would only move the axle side to side by .125" with a 2" up/down (4" total travel). Goes to .29" w/3" (6" total travel). If travel up/down is limited, I don't think I'd have a bind with rubber bushings. But I'm also considering making some delrin bushings for the leaf springs; apparently that should take most lateral motion away.
Still cogitating on this....
Still cogitating on this....
Last edited by GoldHawg on Thu Feb 27, 2020 6:10 am, edited 1 time in total.
- Gregs672000
- Roadster Fanatic-Site Supporter
- Posts: 9011
- Joined: Fri Aug 07, 2009 11:47 pm
- Location: Tacoma, WA
Re: calling suspension gurus. Panhard bar Install?
Ah yes, the old exhaust... in my excitement I forgot about it. Probably why I never explored it further!
Greg Burrows
'67 2000 #588
Tacoma, WA
'67 2000 #588
Tacoma, WA
- Cyclewrks
- Roadster Fanatic
- Posts: 119
- Joined: Wed Feb 03, 2016 1:30 am
- Location: Nashville, TN area
- Model: 1500/1600
- Year: High Windshield-68-70
Re: calling suspension gurus. Panhard bar Install?
The longer the panhard the better off you are as you will get less alignment and handling change as the suspension travels (or body rolls). With the narrow frame rails on the Roadster, I would Go with a Watts link. It would be lots easier to package. Think Alvin has a watts link on his car though he has a full four link setup.
"Life is not a journey to the grave intent to arrive safely in a pretty, well preserved body-but rather arriving in a broadside skid, thoroughly used up, totally worn out and loudly proclaiming "Damn, what a friggin ride!"- Anon
'70 1600
'70 1600