3 link ???

[RockMonkey]

yeah I think your right.
the U link would fit & work well without bindind, But I think I would end up bending it.

I think using parallels & a panhard may be my best option. I think trying to squeze in some triagulated uppers, would end up with clearance issues.
The 4link with a panhard, I know the least about.
with this suspension, what is the best way to se it up to acheive good pinion tracking?

Controlling the pinion angle is a function of the relative lengths of the upper and lower control arms. Much shorter uppers than lowers will result in the pinion rotating down as the suspension droops. Basically, make the arms long and flat-ish, and don't make the uppers a whole lot shorter than the lowers.

Anti-dive is a bunch less important than anti-squat (IMHO), but you should read up on it a bit and decide where you want your anti-dive (some is good). That will help you determine how you'll mount your control arms.

 

[Goose]

thanks for all the great input!!!
Time to do some more homework

 

[LT.]

Sounds like everyone else is pointing you in the right direction about your link design. One thing I wonder about is the VS at the frame versus the VS at the axle. 50% may not be enough. If you can squeeze in closer to 75% at the frame it may help your dive.

LT.

 

[DaveB]

Well I gave it a try on my project spread sheets. I used the four link and the three link with panhard and compared them. I can get the roll axis and roll center to come quite close but the panhard had to be mounted up on top of the frame with the axle end up high also. This of course wouldn't allow the bar to match the drag link angle so it would bump steer. I did get my current design to within 1.5 degrees of roll axis and 4 inches of roll center using the bar placement as planned. Hopefully the rubber bushings and the fact that they are somewhat close will fit the "some" triangulation allowed.

 

[I Lean]

Even if you could get them to match perfectly, that will all change as soon as the suspension moves, since the panhard forces the axle to move in an arc, and the triangulated suspension keeps the axle centered. (during straight compression/extension)

 

[Goose]

Even if you could get them to match perfectly, that will all change as soon as the suspension moves, since the panhard forces the axle to move in an arc, and the triangulated suspension keeps the axle centered. (during straight compression/extension)

makes sense, hopefully at that point the "some" needed is minimal. (something has to give)

 

[DaveB]

Even if you could get them to match perfectly, that will all change as soon as the suspension moves, since the panhard forces the axle to move in an arc, and the triangulated suspension keeps the axle centered. (during straight compression/extension)

I wish someone could give me an idea as to how much triangulation could be allowed or how much triangulation would be required to omit the panhard. I know that the stock jeep setup does have some triangulation and a panhard. On my latest project I have more triangulation than a stock jeep does and can't see an easy way to get rid of it since I have to clear motor mounts, the steering shaft, exhaust, and the motor and these are all forcing more triangulation rather than less.

 

[rockdog]

Goose, Your more than welcome to come take a look at my 3 link w/panhard setup. It is on a toy with hydraulic steering. It handles well. There just isn't a lot of room under these things for four link setups, unless you lift em a lot. Not real desirable when trying to keep a low center of gravity.
I'll pm you my cell #.
Phil

 

[Goose]

I wish someone could give me an idea as to how much triangulation could be allowed or how much triangulation would be required to omit the panhard. I know that the stock jeep setup does have some triangulation and a panhard. On my latest project I have more triangulation than a stock jeep does and can't see an easy way to get rid of it since I have to clear motor mounts, the steering shaft, exhaust, and the motor and these are all forcing more triangulation rather than less.

I know what you mean. I think the bottom line is, when we are working around a stock chassis, there are lots of compromises & some trial & error around some of the risks.
on mine I know I can get some triagulation out of the uppers, & its probably enough to locate the axle. But I dont think it is enough to give it enough strength to fail at some point.
good luck man!

 

[Devel]

Goose, Your more than welcome to come take a look at my 3 link w/panhard setup. It is on a toy with hydraulic steering. It handles well. There just isn't a lot of room under these things for four link setups, unless you lift em a lot. Not real desirable when trying to keep a low center of gravity.
I'll pm you my cell #.
Phil

i dont know if id trust a guy about a good suspension when his avatar is a picture of his rig on its side im just sayin....

 

[rockdog]

i dont know if id trust a guy about a good suspension when his avatar is a picture of his rig on its side im just sayin....

I agree. Thats why I linked it. Pic is when it had leafs. It's changed a ton since then.

 

[zukijames]

goose how about you leave your family trail rig how it is ... and build a rock racer with a subi motor already? then you could do think suspension just how you want and not have to compromise... just my opinion.. totaly kidding your truck is freaking sweet man!


but i think you would look pretty cool in a rock racer

 

[Goose]

goose how about you leave your family trail rig how it is ... and build a rock racer with a subi motor already? then you could do think suspension just how you want and not have to compromise... just my opinion.. totaly kidding your truck is freaking sweet man!


but i think you would look pretty cool in a rock racer

that would be alot of fun!! I would have to give up one of my other hobbies/addictions haha .
plus, I really enjoy being out on the trails with family & friends.
I love pushing the limits of a stock chassis rig, the limitations involved are part of the challenge, (even though it can be frustrating).