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Old 01-08-2004, 05:04 PM
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diagonal link 0r panhard!!

I am installing a package ladder bar set up from Strange. This kit comes with a diagonal link to locate the rear. I have been told that a panhard bar is better for the street. Has anyone had any experience to compare???

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Old 01-08-2004, 05:45 PM
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For the street you never notice the difference.

Here's a website showing how-to set it up.

http://www.rpmnet.com/techart/panhard.shtml

The other axle locating device you are referring to is called a Watts link, here's a site that shows how it works.

http://www.spitzracing.com/watts_link.htm
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Old 01-08-2004, 06:39 PM
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I have seen them set-up with a "diagonal link" between the ladder bars. It connects between the ladder bars, towards the front on one and the rear of the other. Don't know how well they work tho.
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Old 01-08-2004, 07:10 PM
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What is this going on. I ask because it might be better to run a four link system insted of the lader bars.
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Old 01-09-2004, 06:28 AM
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The set up is going into a 55 chevy.
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Old 01-13-2004, 06:53 PM
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A four link requires the same thing a ladder bar suspension does, some means of locating the rear.

I have used the diagonal link on a few cars, they work well so long as the ends are tight. If the heim joints have any play they will wander, and the rear of the car "walks around" while driving.

Another good locating device for the rear is a "wishbone" set-up. if there is room for it...?

Knobie, I would prefer the diagonal over the panhard style by far, but that's just my opinion...? It keeps the suspension within the suspension, so to speak...?
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Old 01-14-2004, 04:38 AM
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Art Morrison does not recommend the diagonal link for street use.
"Most of our 4-links are sold in complete rear suspension packages. They include the 4-link with frame and housing brackets, coil-over rear shocks with springs rate-matched to your exact application and a choice of a [COLOR=red]Panhard bar (for street use) [/COLOR] or diagonal link."
Here is a link... http://www.artmorrison.com/techtipstwo.htm

I would suggest a panhard rod. And I would really suggest leaf springs and CalTrac bars instead of ladder bars OR a 4-link for a street car...
Mark
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Old 01-14-2004, 06:22 AM
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I used a panhard bar on my ladder-bar setup and it worked very well. I have also been under the impression from the research I did that the diagonal was best suited to race applications and not the street.

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Old 01-14-2004, 06:33 AM
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That's strange, but I guess they should know? I've used diagonals a few times, and the cars drove great, trcked great, etc. Street cars.

Years ago we had a street car with a Panhard bar, and it seemed OK unless dips in the road came up, and then it seemed like the Panhard bar was "shifting" the car's rear mass, I guess the geometry must've been out?
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Old 01-14-2004, 06:38 AM
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Quote:
Originally posted by Crazy Mopar Guy
Years ago we had a street car with a Panhard bar, and it seemed OK unless dips in the road came up, and then it seemed like the Panhard bar was "shifting" the car's rear mass, I guess the geometry must've been out?
How long was the panhard bar? Short bars will have more of an impact on the rearends side to side displacement then a long bar. Using a panhard that runs from one side of the chassis to the opposite end of the housing is better suited to have less of an impact on rearend displacement during jounce or rebound.
Mark
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Old 01-14-2004, 09:55 AM
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a diagonal link, or a watt link is Superior with regards to keeping the wheels moving straight up and down. but a panhard is easier to mount in most cases, and does not interfere with exhaust or drive shafts like the aforementioned..
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Old 01-14-2004, 04:02 PM
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Quote:
Originally posted by astroracer
How long was the panhard bar? Short bars will have more of an impact on the rearends side to side displacement then a long bar. Using a panhard that runs from one side of the chassis to the opposite end of the housing is better suited to have less of an impact on rearend displacement during jounce or rebound.
Mark
Well, the car is gone now, but it was tubbed quite radically, and there just isn't much room for a "longer" panhard bar?
I would guess 24". It handled what could best be described as.. "erratically".

The diagonal link is a pain in the butt as far as exhaust went on my past cars, but they sure drove nice, launched hard, and tracked straight.
I had a tubbed Chevelle owner ask me how I liked the rear set-up on my Demon, we both had diagonals. I told him I loved it, the car tracked straight, drove nice, etc.
He complained his was "wishy-washy", but when we looked underneath it was easy to see why. The bolt holes in his ends for his diagonal link had elongated, and there was a ton of play. He said it was scary to drive it 50 mph. I could push the rear of his car and watch it shift side to side.

I've been in a couple panhard bar cars, and they felt strange in the rear, to me at least. Maybe they were set up wrong?
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Old 01-14-2004, 08:05 PM
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I've read something a while ago in the Chris Alston catalogue, I don't have it in front of me so I'll have to go from memory (uh oh).

He recommends a diagonal bar if the car is tubbed and the ladder bars are close together. Apparenly if the suspension is too narrow (short rear end and close ladder bars), the panhard bar will have to be too short and the side to side travel as it follows along the arc will be too great. Basically, I think the panhard bar can be used with normal width suspensions, but it won't work well in narrowed applications.

I've also read somewhere else that diagonal bars need to be very strong on street driven vehicles, or the ends will break. I think it's for this reason the Chris Alston stuff has urethane bushings and is extra beefy on the street applications.

I have no first hand experience with this stuff, but I think I remember reading this,
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Old 01-14-2004, 08:37 PM
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Well, I have a urethane bushed 4 link with a diagonal in the car I'm building now, so I should be able to get some input back hopefully this summer.
I honestly thought (and am still thinking) of tossing the urethane bushed ends in the diagonal and go to solid ends, I was worried about deflection?
I would LOVE to use the wishbone set-up, and still might if it will work.

And... HEY! dh79.....

GO YOU HAIRY CANUCKS GO!!!!!!!!!!!!!!!!!!!!!!!!
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Old 01-15-2004, 04:34 AM
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Hey Crazy, I just wanted to give you the boost you needed to throw away those bushings. I have heard nothing but bad about urethane bushed 4 links. Why would you add flex into a system that is designed to not flex and is designed to be tuned with preload? How do you preload a spongy bushing? I suppose it is an effort to take the harshness out of a race suspension that is being used in a street car, but then again what is the point.

Oh yeah, go diagonal(watts) for the track locator. As mentioned the panhard will cause the car to track differently when the suspension squats.

Chris
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