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Old January 9th, 2008, 09:36 PM   #1
Rocky
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Default track bar design

Any reason way 1.25 X .281" Wall DOM Tubing wouldn't be strong enough for a track bar? I shouldn't need to put any bends in it. Kind of having a brain fart today.

Useing a 3/4-16 heim at axle end and a fixed small RE joint at the frame. Or would a bushing at the axle end be better?

98 XJ D30 not that it matters.

Last edited by Rocky; January 9th, 2008 at 09:40 PM.
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Old January 9th, 2008, 09:59 PM   #2
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I used 1 3/8" with around 1/4" wall so it should be fine.

I would use a bushing.
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Old January 10th, 2008, 07:50 AM   #3
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.281" wall is plenty. a track bar is (should be unless it hits things) loaded with push/pull forces only, as long as it doesnt buckle under the loads then it is sufficient. if you can I would go with 1.5x.120 to save some weight... it will resist bending more than a a smaller diameter tube.

in a nut shell a smaller tube with a heavier wall will resist denting but will bend easier than a larger diameter tube with a thinner wall that will dent easier.

it might be a wash by the time you put the inserts in for the 3/4-16 though....
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Old January 10th, 2008, 08:10 AM   #4
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1.25x.281 will be fine, if you try using 1.5 you will have issues getting it to fit in the axle end of a d30. as for bushing over a heim?, just depends on whether you mind a little more noise transfer. the bushing absorbs more noise and vibration than a heim. but since you are building it yourself the heim is way easier
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Old January 10th, 2008, 05:27 PM   #5
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Quote:
Originally Posted by 95geo View Post
.281" wall is plenty. a track bar is (should be unless it hits things) loaded with push/pull forces only, as long as it doesnt buckle under the loads then it is sufficient. if you can I would go with 1.5x.120 to save some weight... it will resist bending more than a a smaller diameter tube.

in a nut shell a smaller tube with a heavier wall will resist denting but will bend easier than a larger diameter tube with a thinner wall that will dent easier.

it might be a wash by the time you put the inserts in for the 3/4-16 though....
True.

I really don't want to use a insert if I don't have to. That's why I was thinking about the 1.25" .281" wall. Since it's the right ID for a 3/4-16 NF tap.
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Old January 10th, 2008, 05:31 PM   #6
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Quote:
Originally Posted by jeepnxj96 View Post
1.25x.281 will be fine, if you try using 1.5 you will have issues getting it to fit in the axle end of a d30. as for bushing over a heim?, just depends on whether you mind a little more noise transfer. the bushing absorbs more noise and vibration than a heim. but since you are building it yourself the heim is way easier
My LCA's are Heims at the axle. The track bar bracket is over the top of the axle, I have more clearance than stock. Going to use the lower of the two holes.


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Old January 12th, 2008, 02:32 PM   #7
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I'm 99% sure I'm going to use a 2" Johnny Joint with 3/4-16 NF stud at the frame and a stock type bushing at the axle end. For the bar 1.50" 0.120" wall tube and a threaded insert. Sound good before I order the stuff?
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Old January 12th, 2008, 04:50 PM   #8
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i dont like the 7/16 bolt on the 2" JJ it'll probably get the job done though.....

your call.
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Old January 12th, 2008, 07:00 PM   #9
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i dont like the 7/16 bolt on the 2" JJ it'll probably get the job done though.....

your call.
The grease bolt is extra and I won't be useing it. Just a plain old grade 8 7/16.

Last edited by Rocky; January 12th, 2008 at 07:03 PM.
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