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Old 04-08-2005, 11:54 AM   #1 (permalink)
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Quick LCA question

I have read and read and read about building LCA's, but still have one question. Is 2 inch OD 3/8 wall DOM strong enough to last a while in the front of a 90XJ with a waggy D44. And is a 1 inch 1-14 thread grade 8 going to hold up also?
The plan is to cut the head of the bolt off and press it into the 1.25 OD DOM drill and weld it in then press that into the 2"OD drill well and then weld around the end. On the short end I am going to turn some grade 8 coupling nuts down on the lathe to fit in the 2"od DOM and then drill and weld the nut into the tube. RE super flex at the frame and RE super ride at the axle.
Does it sound like it will be enough to hold up to landing on rocks?
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Old 04-08-2005, 01:08 PM   #2 (permalink)
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regarding the 2" .375 wall DOM; yes, it'll hold up. as far as the threaded portion goes, I'm not a big fan of it but I won't discount it to not work. I'm sure someone else will chime in to give you their thoughts....
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Old 04-08-2005, 04:08 PM   #3 (permalink)
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Picture of what I am talking about


Here is the idea, It may sound stupid to ask this question, but I want to confirm or deny my thoughts on this. Thanks
Ron
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Old 04-08-2005, 04:28 PM   #4 (permalink)
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whats the threaded section for?
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Old 04-08-2005, 04:35 PM   #5 (permalink)
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Quote:
Originally Posted by chris demartini
whats the threaded section for?
It is the bolt that threads into the nut on the shourt end of the control arm.
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Old 04-08-2005, 04:41 PM   #6 (permalink)
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I meant why not just run the link one peice?
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Old 04-08-2005, 04:48 PM   #7 (permalink)
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The 2" won't matter since your LCA will only be as strong as the 1" bolt(just over .875 )
On the other hand people use 3/4 heims all the time, but they are not in the middle of the link.( more leverage )
I would put the threaded end as close as possible to one end or the other
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Old 04-08-2005, 08:09 PM   #8 (permalink)
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Yeah just measure twice and cut once and make them one piece. The design looks good but if you get it right the first time then there is no need for adjustment. I was all worried that I would need adjustment on my four link rear but decided not too, its cheaper and less work not to. Get pinion angle set and make one piece, non-adjustable links.
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Old 04-08-2005, 08:14 PM   #9 (permalink)
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The threaded end will be 2inches from the joint as close as possible to the joint. The main reason for going so with the strong tubing is more for impact than the pulling. I am thinking that the bolt being real close to the joint it will not see as much impact as the tubing. I am having a hell of a time finding a 1.25 grade 8 with 12tpi, here in Sac. I do have access to a good lathe would drill stock be stronger than grade 8?
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Old 04-09-2005, 06:53 AM   #10 (permalink)
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as asked above, why do you need it adjustable? if it's for pinion angle just make the uppers adjustable. if it's for setting the axle in place you need to get better w/ the tape measure. seriously, it'll likely be more trouble than it's worth, go solid & forget about it....
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Old 04-09-2005, 11:36 AM   #11 (permalink)
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Ya know, you guys just might be right. I have been wanting to make them adjustable so if I decide to change the lift height I can adjust it and keep the axle placement where I want it. But if I place everything first and locate the axle where I want it there will be no need to adjust it, I think.
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