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Project 91 Pathfinder - Alvarez Metal Works
06-01-2017, 09:07 PM
Post: #241
RE: Project 91 Pathfinder - Alvarez Metal Works
Oh man that was a fun week! We were all up until 2 or 3 swapping that trans. That stupid torsion bar corssmember was right in the way the whole time.

Maybe you can get a few more miles out of the 5 speed Blush

Mike
2000 XJ Cherokee - 3.5'' lift / 32'' Tirerecapper Pizza Cutters / Front Locker
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07-04-2017, 10:03 PM (This post was last modified: 07-04-2017 10:03 PM by AlvarezMetalWorks.)
Post: #242
RE: Project 91 Pathfinder - Alvarez Metal Works
Getting the axle lined up so I can finally get this damn thing linked up. Got lots of pics to post but I'll do that later.

   

Alvarez Metal Works
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07-18-2017, 07:11 PM
Post: #243
RE: Project 91 Pathfinder - Alvarez Metal Works
More pics of the progress.

Lower links are made. Steering is done (unless I need to modify it for clearance).

   

   

   

Caster is set at 6.2 degrees.

   

Next step is to build the truss, Get my upper link attached to it and the track bar attached to it too.

Alvarez Metal Works
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07-18-2017, 07:44 PM
Post: #244
RE: Project 91 Pathfinder - Alvarez Metal Works
So I figured I'd explain something for those that want to know why I went with a bushing at one end of the link and a 1.25 rode end on the other end.

So a popular choice for rod ends on a dual purpose wheeler (street/trails) is a Johnny Joint. I wasn't sold on those for a few reasons. 1: They are expensive. 2: They only have about half the movement as a heim style rod end with high misalignment spacers. 3: I was worried about having to constantly rebuild them due to all the mud we have out here.

Another option would be to run heim style rod ends on both ends. My issues with that are as followed. 1: There would be zero vibration dampening. I'd feel everything. Like running a sold motor mount. 2: They are expensive. 3: I was worried about having to replace these frequently due to the mud. They aren't rebuildable.

One problem both of those setups tend to have is, the link tubes tend to spin. This could cause one or both of the following issues. 1: The rod ends don't sit centered in the mounts. They twist and then stay in that position. They don't spring back to the centered position. 2: I've also heard many reports of people saying that the jam nuts on the rod ends come loose because the tube spins and looses them up. Some people put tack welds on the jam nuts to prevent that from happening. I don't like the idea of having to do that.

So my solution to all of this was to run a bushing on the axle side of the links and a heim style rod end on the frame side. Here is my theory behind it all.

1: This will keep the cost of the build way down. The weld ob bushing kits are $13 each. That includes the bushing, section of tube that it slide into, and a zerk fitting so that I can grease them. Those other joint can run in the range of $60+ each once you factor in the cost of all the parts. Plus the bushing are easily replaceable.

2: The bushing will keep my link from twisting. It will allow enough twist to cycle the suspension but it will always spring back to center. This should always keep my heim style rod end centered on the other end of the link too. It should keep me from having to put a tack weld on the jam nut too.

3: Having the bushing on the axle side was done to keep what I believe to be the more moisture durable rod end on the side that is more prone to be dunked into the water and mud. This is questionable and maybe a bit of a stretch, but that's my reasoning behind what end will be mounted on the axle side of the link. Oh and it's also stronger! Just in case I land hard on a rock or stump.

4: The heim style rod end has about double the movement that a johnny style joint does. This means that having a heim style joint on one end and a bushing on the other should have the ability to move more than two johnny joints. Having the bushing on the other end should give me the vibration dampening benefits that a johnny joint has without having to have them.

How well this theory actually holds up will only be found out over time. So I guess we'll see.

Alvarez Metal Works
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07-19-2017, 07:31 AM
Post: #245
RE: Project 91 Pathfinder - Alvarez Metal Works
Interested to see how everything works out. I think I would have ran the joints in the opposite configuration. Heim at the axle end since it will see the most movement and twisting. Bushing at the frame end where all the crap kicked up from your tires is going to hit. The bushing will also dampen the most vibration at the frame.

Why 6.2° caster? Seems a bit much for a something that may see highway use.

Either way keep after it, this thing has been on jack stands for too long!

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07-19-2017, 08:04 AM
Post: #246
RE: Project 91 Pathfinder - Alvarez Metal Works
I could easily flip the links around if that's the case. Mounting width is the same.

As for the caster. I went with 6.2 because I read 6 degrees was a good number and I figured 6.2 is close enough lol. Do you disagree with 6 being a good number? If so what do you think it should be at?

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07-19-2017, 01:30 PM
Post: #247
RE: Project 91 Pathfinder - Alvarez Metal Works
Stock Pathy is 1.30° ± 0.30°

The Bronco your axle came out of is at 3.50° ± 0.75°, the Scout 44s I've built seem to like about that spec too.

Maybe 6.0° will be fine? , but a more positive angle is likely it is to (death)wobble at speed like the J**ps do. Assuming you are measuring from the floor and not including pinion angle into the measurement.

Give it a try and see what happens.

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07-19-2017, 01:52 PM
Post: #248
RE: Project 91 Pathfinder - Alvarez Metal Works
I'm measuring from the frame. Frame being set to zero. So in theory yes the floor. Pinion angle is set to zero ujoint angle on the axle side at ride hight. I plan running a dual cardan joint drive shaft. Pinion angle was set. I zeroed out my angle finder on the frame. Then adjusted the inner Cs to 6.2 degrees.

You're scaring me man. I've never heard number that low before. A friend of mine is running 5.5 on his 44.

Alvarez Metal Works
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Today, 01:17 AM (This post was last modified: Today 01:19 AM by AlvarezMetalWorks.)
Post: #249
RE: Project 91 Pathfinder - Alvarez Metal Works
More progress. Stared on the truss. Got everything linked up well enough to cycle the suspension. Track bar hit the oil pan on this odd low spot. I'm going to pull the pan on my spare engine and see if I it will hear to knock the low spot up flat. That should give me just enough up travel to max out my shocks. We'll see though. I still have so much to do. Everything is tacked in place. The track bar mounts are not even close to finished. I did just enough to cycle the suspension. Everything is so tight I needed to make sure it fit before I spent a ton of time on the brackets. Other than the oil pan being in the way, so far so go. No binding at all.

   

   

   

   

Alvarez Metal Works
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Today, 01:51 AM
Post: #250
RE: Project 91 Pathfinder - Alvarez Metal Works
   

   

   

   

   

   

Alvarez Metal Works
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