panhard vs angled uppers

[Mace]

Because uncaptured springs are more likely to go bouncing down the trail and it does NOTHINg but give you a higher RTI score...

 

[Gumby]

The springs are captured at the bottom, although not in the pic. The cones at the top will keep them on track on the top. If it turns out the cones aren't doing the job, I'll pull them and capture the top as well.

 

[lowtideride]

bump

 

[Uncle Ben]

The springs are captured at the bottom, although not in the pic. The cones at the top will keep them on track on the top. If it turns out the cones aren't doing the job, I'll pull them and capture the top as well.

Coil springs don't last very long if stretched. Capturing the bottom and having a long enough cone is the key. Nice setup on the Pig! The square tubed lower arms will likely be the first thing replaced.

 

[Gumby]

Coil springs don't last very long if stretched. Capturing the bottom and having a long enough cone is the key. Nice setup on the Pig! The square tubed lower arms will likely be the first thing replaced.

Thinking they're gonna bend or ...?

The front is all together. I ended up just ordering the 70 series locking axle from C-dan. The 40 and 60 series can be resplined because the shaft is narrower than the splines. The 80 series shaft could be cut down and resplined but it's pretty different. I think I have the plan for the cable lockers worked out and should have something up soon if it works out.

The rear is all done except for some tweaking and all the little crap that takes time. Putting the floor panel in the back, trimming the wheel wells, routing and building the exhaust, etc.

I hope to have it done for this weekend, I just don't know if I want to road test it for 3.5 hours, then wheel it and drive it back when I have to be at school on Monday.

 

[Mace]

Coil springs don't last very long if stretched. Capturing the bottom and having a long enough cone is the key. Nice setup on the Pig! The square tubed lower arms will likely be the first thing replaced.

So the coils on the back of my 40 (3 years old now) won't last huh..

An unattched upper coil mount is easier on the coils, but it also is about as effective as revolver shackles or a Z link.

 

[Mace]

Gumby, in that last pic of the axle, are your shocks maxed out? Or just not mounted yet?

 

[Gumby]

I didn't have the upper shock hoop installed for that pic. They bottom out about an inch after the bump stops hit.

They're also vertical, not all kitty-wampus like in the pic.

I understand there is no positive advantage to not capturing both ends, but what is the negative to only having one end captured, other than locating the spring?

 

[Mace]

It just allows the possibility of the spring having issues.

If, at full droop the spring barely detatches from the upper buckett then it really is not that big of a deal with the length of the bumpstop you have. But if it even gets remotely close to the end of the bumpstop it is much easier to have something hit the spring (happens a lot on mud) and not allow it to recenter itself..

Also allows some uncontroled unloading going down hill..

 

[Gumby]

I'm hoping the limiter strap will control most of the uncontrolled unloading of both springs at once.

 

[ats4x4dotcom]

The problem with an uncaptured spring is the vehicle weight transfer has a run up before it gets any resistance against the spring, and then tries to arrest the vehicle movement once it has momentum.

We have had alot to do with this in the last few months, using fox 14" shocks and standard mounting for springs, we have designed springs with a 100mm taller free height, and 3" lift ride height, to keep the spring captive, and offer some resistance at full stretch against momentum.

 

[Radd Cruisers]

Well thats some good advice, tried and test.....


Thanks

 

[Uncle Ben]

So the coils on the back of my 40 (3 years old now) won't last huh..

An unattched upper coil mount is easier on the coils, but it also is about as effective as revolver shackles or a Z link.

Nope....probably already dead! My point is, compression springs will fatique when stretched and compressed like any wire. (example: the sping in a ball point pin will outlast the rest of the pin UNLESS you take it out and stretch it!) The other side of the argument is when the spring unseats, the travel back to seated position is only dampened by the shock. The only true solution is to have enough coils on the spring to handle the entire droop the axle is allowed to travel without unseating or stretching.

I agree with the "only as effective as" statement. A stretched coil has the same factor involved except it allows a smoother transition from unloaded to loaded. Cantilevered shackles "if they even open" do add some stabilility when the vehicle is on huge rocks. While the drooped axle has very little traction it does allow the weight transfer to happen in a more controlled mannor by keeping the vehicle more level. Unfortunatley, most of the time the leaf spring is too stiff and the fixed bushing end has so little flex the cantilever cant open so nothing is gained and a degree of traction is actually lost.

 

[Gumby]

Got her pretty well buttoned up yesterday. I went and got the district fork truck to see how it flexed.



36" off the ground on the front wheels

38" on the rears with some room to go. Tons of shock travel left. I was running into my quarters quite a bit. They still need a bunch of trimming

That's with the sway bar hooked up. I didn't bother to unhook it because I was pretty darn happy with what I already had and the body was staying damn level compared to the SOA.

Then we drove it a couple of miles down the road to get some lunch. Handles much, much better than I expected. Not a ton of body lean in the corners. Tracks straight. Not any excessive dive or squat.

Cable lockers work very well. I'm very happy with them as well.

Now I gotta get it to the Cliffs for some real testing.

 

[lowtideride]

Looking very cool

 

[Tapage]

36" off the ground on the front wheels

38" on the rears with some room to go. Tons of shock travel left. I was running into my quarters quite a bit.

Nice dude ... just to know this 36" from floor to bottom line of tire or center hub . ?

how you feel the dive and squat .?

 

[Gumby]

Nice dude ... just to know this 36" from floor to bottom line of tire or center hub . ?

how you feel the dive and squat .?

To the bottom of the 37s.

Accel and decel forces rocking the truck back and forth are pretty minimal on this truck.

The first place I had the uppers would twist the back of the truck badly on acceleration.

 

[Tapage]

To the bottom of the 37s.

Accel and decel forces rocking the truck back and forth are pretty minimal on this truck.

The first place I had the uppers would twist the back of the truck badly on acceleration.

I meassure time ago 46" to the center of hub in my truck .. but still having some diving issues coz I have SR setup.

 

[outbackoffroadgear]

Looking good Gumby I can not what to go wheeling to se it in action know .
See you on the trail

 

[green_machine]

uncaptured springs are a very poor idea..

hear hear...

retain those puppies... same travel yet more stable. unretained coils feel like coilovers - they unload way to quick once tip point is close


j