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Unread 04-17-2013, 09:28 PM   #1
Maine1994ZJ
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ZJ long arm suspenion quiz time ;)

So, being the creative guy with a newly acquired welder that I am and considering that the '93(Weezy) has CAs & bushings that are falling apart, I've decided to build my own lift kit.
Plus, I need more welding practice... Hahahahaha
I'll be taking the 3" BB out of the '94(George) and returning him to stock configuration. I plan on using the BB in Weezy, but with her Upcountry springs, I'll be in the neighborhood of 4" of lift.
Too much for stock CAs. Does anyone have(or know someone who does have) a ZJ 4" LA lift that they could give me the CA measurements off, from bushing center to bushing center, upper and lower, front and rear?
I figure 1/8" thick tubing should suffice?? Track bars would be made of the same tubing with adjusters at one end.
Possibly 1/8"x1.5"x1.5" square tubing with another 1/8"x1.5" strip welded to the bottoms of the lower CAs, just for a little extra protection.
Any help would be greatly appreciated!!!!

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Unread 04-17-2013, 09:50 PM   #2
biggoofy
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This ought to be good. 1/8" is no wear near enough material for long arms they will fold like tin cans.
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Unread 04-17-2013, 10:06 PM   #3
ratmonkey
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lowers should be 2"x.250 wall round or 2x2x.250 wall square. uppers can be 1.5"x.250 wall the round will be less expensive as it's less weight, but the square is slightly stronger in the areas that matter.
do not use black pipe or conduit. use hrew, DOM, or chromoly DOM. or solid aluminum if you've got the change to spare.

1.5" dia tube is just not strong enough for lowers.
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Unread 04-17-2013, 10:14 PM   #4
Maine1994ZJ
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Quote:
Originally Posted by biggoofy View Post
This ought to be good. 1/8" is no wear near enough material for long arms they will fold like tin cans.
Thickness suggestions? 1/4"? 5/16? Hence the ??? in the original post...
Stock CAs are only 18ga or 20ga IIRC. Yes, they are taller than 1.5", by probably a good inch+.
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Unread 04-17-2013, 10:21 PM   #5
Maine1994ZJ
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Quote:
Originally Posted by ratmonkey View Post
lowers should be 2"x.250 wall round or 2x2x.250 wall square. uppers can be 1.5"x.250 wall the round will be less expensive as it's less weight, but the square is slightly stronger in the areas that matter.
do not use black pipe or conduit. use hrew, DOM, or chromoly DOM. or solid aluminum if you've got the change to spare.

1.5" dia tube is just not strong enough for lowers.
Thanks!! Much appreciated!!!! That's exactly what I wanted to know!!! Notes taken!!!
Don't suppose you know the lengths, by any chance??
Oh, any recommendations on bushings to use???
Again, Thanks!!!
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Unread 04-17-2013, 11:04 PM   #6
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Unread 04-17-2013, 11:10 PM   #7
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This would probably be a good place to start: http://www.ruffstuffspecialties.com/...g/4LKTUBE.html
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Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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Unread 04-18-2013, 04:38 AM   #8
jtackerman28
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You don't really need long arms at 4"
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Unread 04-18-2013, 04:47 AM   #9
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Quote:
Originally Posted by Maine1994ZJ View Post
Thanks!! Much appreciated!!!! That's exactly what I wanted to know!!! Notes taken!!!
Don't suppose you know the lengths, by any chance??
Oh, any recommendations on bushings to use???
Again, Thanks!!!
Use joints. Bushings put too much stress on brackets with a suspension that can travel as much as a Long arm system.
Use Currie joints, they're worth the money.

At 4" the front will probably be OK, but the rear will contact the body at less then full stuff.

The arms will be as long as they are. For the front most places replace the transmission cross member with a control arm mount set up.
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Unread 04-18-2013, 05:53 AM   #10
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Quote:
Originally Posted by jtackerman28 View Post
You don't really need long arms at 4"
Huh????
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Unread 04-18-2013, 08:08 AM   #11
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Quote:
Originally Posted by jtackerman28 View Post
You don't really need long arms at 4"
Look again at the geometry, LA's will be much better
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Unread 04-18-2013, 08:13 AM   #12
riot1987
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Quote:
Originally Posted by jtackerman28 View Post
You don't really need long arms at 4"
Im just over 4" with LA's
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Unread 04-18-2013, 06:14 PM   #13
Maine1994ZJ
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Quote:
Originally Posted by ratmonkey View Post
Use joints. Bushings put too much stress on brackets with a suspension that can travel as much as a Long arm system.
Use Currie joints, they're worth the money.

At 4" the front will probably be OK, but the rear will contact the body at less then full stuff.

The arms will be as long as they are. For the front most places replace the transmission cross member with a control arm mount set up.
Thanks again!!
I'm gonna spend some time checking out LA kits and do some more research.
I shoulda bought a welder years ago... Building stuff is a blast!!
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Unread 04-18-2013, 06:18 PM   #14
riot1987
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Quote:
Originally Posted by Maine1994ZJ View Post
Thanks again!!
I'm gonna spend some time checking out LA kits and do some more research.
I shoulda bought a welder years ago... Building stuff is a blast!!
I ****ing love building **** too man. Welding is awesome. Im SOO stocked to get a plasma cutter soon. Then ITS ON

Good luck man!
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Unread 04-18-2013, 06:20 PM   #15
riot1987
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I could give you measurements off mine if you want? I have 4 link rears and 3 link or triangulated ..I believe they're called.. up front
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