Aftermarket rear multilink suspension parts... question about how they are made.

[yellow2000SR]

Please delete topic... I found answers already, thanks


The below pictures were posted in a topic over on the nicoclub forums by eazye2000 and reminded me about a few questions I have which are after the quoted post.

Originally Posted by eazye2000

What I personally regret buying for my car...Hmm
The 'Motoria Suspension' setup. The heim joints SUCK.. They look very weak, and compared to others, seem very low quality. The rest of them look awesome, though. Maybe swap Heim Joints? Someone e-mail me for some good ones. e_appie(at)hotmail.com
Here's some pics.

The below picture is going to be considered the "race setup" seeing that both ends are adjustable so you can really fine tune the setup... a "street setup" will just be adjustable at the heim end because of the mileage that can be put on and the possibility of the jam nuts possibly backing off and then vibrations possibly causing the tubing to spin and mess up settings.

Explain to me the ends of the suspension parts where the heims are. I've always wondered about how the other companies are doing them. I see a bunch of hex heads (2?) and then the jam nut before the heims themselves. Is it all male/female threaded into one another to step down to the size of the heims? Could you take measurements of the heims? The ID of the hole for the bolts should be basically 12mm b/c that's what the bolts are but what size is the threaded part?
If those are just threaded in step downs its kinda lame... seems like it would be the weak link in the design... why wouldn't they use a larger heim and then just use a pressed in sleeve in the ball part of the heim to step it down to 12mm? That's my plan at least for when I redo the setup I'm working on and then set up a group buy.





Compare that to the 1st set I've made with the tubing a smaller size and tapped to fit heims... In the pics, it is .154 wall tapped for 5/8" heims with a bushing/sleeve reducing the 5/8" to 1/2" (This setup is going to be used on another project that is going to be running 1/2" bolts instead of 12mm, so don't worry).

This setup is going to be redone yet again... with some differences in the tubing used, better heims that will also of course be metric.

[naed240sx]

Not quite sure what you are asking. The red suspension arms that you have pictured are a very bad design unless one side of the arm is reverse threaded. Otherwise you wouldn't be able to lengthen or shorten the arm while it was on the car.

Those red rucas you definately would not be able to adjust while on the car. YOu would have to remove half of it to spin it and change the length.

Nothing wrong with the way most arms are designed (SPL/nams is fine). The larger diameter threaded part is hollow and the smaller diameter section fits inside. All that matters with suspension arms is strength in tension or compression.

[yellow2000SR]

Originally Posted by naed240sx

Not quite sure what you are asking. The red suspension arms that you have pictured are a very bad design unless one side of the arm is reverse threaded. Otherwise you wouldn't be able to lengthen or shorten the arm while it was on the car.

Those red rucas you definately would not be able to adjust while on the car. YOu would have to remove half of it to spin it and change the length.

Nothing wrong with the way most arms are designed (SPL/nams is fine). The larger diameter threaded part is hollow and the smaller diameter section fits inside. All that matters with suspension arms is strength in tension or compression.

The heims are left hand thread, the other end right hand so they are opposite so it can be lengthened/shortened like you said... I made them and they are the 1st ones but not a final design.


I just found this picture posted by swift m0nster of his suspension setup (shrunk it and added 1 and 2 to point at areas I'm talking about). It answers one of my questions about how the heim ends are... I'm actually surprised that there is 2 steps of adjustment (don't know what to call it). Are all the heim ends like this? Basically, 1 step would be the heim itself with the jam nut, and then the other "step" would be the insert / setup up that is threaded on the inside for the heim, and then threaded on the outside to go into the tubing.

[yellow2000SR]

Please delete topic... I found answers already, thanks