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Discussion Starter #143
My favorite build thread on pirate. :smokin:
Thanks Larryboy! That means a heck of a lot. Forgive me for being a little biased towards my project...and for all the incredible builds on pirate I'll agree with one caveat...My favorite "street legal" build.

:beer:
 

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Getting things orientated. It's going to be tight where the head of the shock mounts as the upper link shares the same area. The link center 1.5" higher and 1" farther forward. It's nestled as close to the shock as possible with just enough room to get the shock bolt out. Once the shock is out, the link bolt can be then removed. There will be a common wall between the two.



 

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Looking good my friend, but linking the rear is the easy end of the truck :)

Packaging my front 3-link has taken me MONTHS.

On a serious note, I hope you are going to laminate all those brackets to beef them up? Looks like 1/8" material almost everywhere (maybe 3/16") and that's nowhere near strong enough for real life driving unless you never plan on leaving the pavement.

The old 4Mogger build thread is a good reference. His truck was built very pretty with similar material thickness. On the very first trip out, the mounts twisted and tore off the truck at the axle. In my axle build thread in this forum there are some carnage shots from one of the members showing a 1/2" upper mount ripped to shreds... Admittedly, he also appeared to have limited vertical link separation, and was running a 3-link. The loading gets awfully high on those components, so if you haven't already you should plug the link positions into the 4-link calculator and see how high your link loads actually are.

My 6G numbers seemed to be in the 60,000psi range.... You gotta take numbers like that seriously when you build the mounts.


-G
 

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On a serious note, I hope you are going to laminate all those brackets to beef them up? Looks like 1/8" material almost everywhere (maybe 3/16") and that's nowhere near strong enough for real life driving unless you never plan on leaving the pavement.


-G

I agree, I'm building a 3-link front end right now, 3/8" for my link mounts and it's just a straight axle without a pumpkin.

Mog axles with the extra leverage are super hard on things. Don't they have .500 wall housings?
 

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Some of the material in the cross member is .100"

Thanks for your concern with the link mount strength issue. However... and this is just my opinion... I believe a well designed and tig welded .190" chromoly capture plate is less prone to failure than a poorly designed, poorly welded, 3/8" or even 1" thick mount made from barn steel hot plate.
 

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Discussion Starter #158 (Edited)
wholly honeycombs of 4130 :eek:

4moggers carnage was...
"The passenger front lower airbag mount flopped over and ended my day."

not sure if that event could be attributed to the force (psi) of the airbag or the torque generated from the axle, or a little of both. I also didn't remember seeing any limiting straps. :shaking:

On a serious note, I hope you are going to laminate all those brackets to beef them up? Looks like 1/8" material almost everywhere (maybe 3/16") and that's nowhere near strong enough for real life driving unless you never plan on leaving the pavement.

Greg,

Check out the FJ wagon page on the second page. The owner abuses his wagon more than mine will see. If you look where all of the links come together in the center of the frame it was fabbed up with .190 or 3/16. I'm not a big fan of the failure prone XCL joints.

Here is a shot of the FJ wagon where all the links converge.



All the other links on the axle are 3/16, however they are bridged.



Due to some time constraints we are up against the clock. We obviously want to do things right as I have a huge stake in that, but we need to get this thing as close to a roller asap. Trust me we will go over this with a fine tooth comb.
 

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Some of the material in the cross member is .100"

Thanks for your concern with the link mount strength issue. However... and this is just my opinion... I believe a well designed and tig welded .190" chromoly capture plate is less prone to failure than a poorly designed, poorly welded, 3/8" or even 1" thick mount made from barn steel hot plate.

Assuming you anneal it at a minimum you'll be about equal with my cold rolled and mig welded mounts.

If you're not fully welded yet I'd make that bitchin' cross member bolt to the frame so you can give the cross member a proper PWHT.

Opinion never trumps fact and a Mog axle will twist stuff like a pretzel.


Ok, I'm not gonna say anymore about it.

On with the awesome build!!!


:beer:
 
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