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Unread 05-07-2010, 05:40 PM   #1
TreverTJ
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TJ Long arm build

Heres my Long arm build. It is a radius arm style with no rear triangulation. For now I will be keeping the rear track bar. May Triangulate in the future.



1" currie for frame end of lower arms.


Using these 1" Ubolt nuts for the inserts.


2"x2" with 1/4" wall for lower arms.


1.5"x1.5" 3/16" wall for upper arms.


Picked up these BDS rails. This made the work very easy and saved a lot of time!




Off with the old axle brackets.


Built some new ones.
























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Unread 05-07-2010, 05:41 PM   #2
TreverTJ
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Short radius arm for front.






Some action shots of how it works.






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Unread 05-07-2010, 05:48 PM   #3
Imped
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No vertical separation at the axle end in the rear? What are your thoughts on that?

Otherwise, GREAT work.
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Unread 05-07-2010, 05:52 PM   #4
TreverTJ
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What do you mean by verticle separation at the rear axle?
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Unread 05-07-2010, 05:54 PM   #5
Imped
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The frame ends of the upper and lower rear arms are in the same plane, ie no vertical separation. This is generally an invitation for poor anti-squat numbers.
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Unread 05-07-2010, 05:58 PM   #6
TreverTJ
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ahh,,I getcha. I guess im not up on my "4 link lingo" lol. These frame rails are BDS and is what BDS uses in most of there long arm systems so I would presume it should be ok. Jeep seems to work very well and road manners are far superior then they were with the short arms.

However I will be changing this when I triangulate.
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Unread 05-07-2010, 06:07 PM   #7
Imped
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Oh ok, didn't realize the BDS mounts incorporated the mounts for both uppers and lowers.

BTW, this is a good read: Multi-Link Suspension System Technology - Roll Center and Anti Squat - Off-Road Magazine
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Unread 05-07-2010, 06:08 PM   #8
TreverTJ
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Thanks for the link! One more to add to my favourites!
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Unread 05-07-2010, 06:37 PM   #9
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wow very nice work!
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Unread 05-07-2010, 07:47 PM   #10
TheSherp
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How much do you have into the entire set up. I'm all about building what I can. Ive read where its not that much cheaper to build a long arm kit. I want to stay with short arms but........ building short arms this way seems not to difficult.
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Unread 05-07-2010, 07:52 PM   #11
TreverTJ
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This cost me about $800 to build,,,thats from cost of steel to paint. The curry joints alone where $300 for the six of them. One thing tho,,most aftermarket long arms arent 1/4" wall. Ive seen a lot of my buddies bend their aftermarket arms. Ive went everywhere they have and have no worries EVER of bending my arms!

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Unread 05-07-2010, 07:56 PM   #12
jeep4alex
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Nice stuff Trever
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Unread 05-07-2010, 08:17 PM   #13
XJoutlaw
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Any strength gain buy using square to round or was this just what you had or what? just curious.
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Unread 05-07-2010, 08:31 PM   #14
TreverTJ
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Ive read a few things that imply square is better then round and vise versa. Heres my theory :

When a round arm comes down on a rock the load to the impact point to the arm is very small. When a square arm comes down on that same rock it has a flat bottom which in theory will have more surface area in contact with the rock which spreads the load of impact. With that said you could say square is stronger but really,,there is sooo many variables. Grade of steel, wall thickness, length of arms, etc..


The biggest reason why I choose square was because it was different then what everybody runs around here. I like to be different! lol
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Unread 05-07-2010, 10:15 PM   #15
XJoutlaw
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awesome well they look top notch man
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