Ch***is engineering set-up in my A sedan. Wasnt cheap...but cant beat adjustablity, plus 6" of ride height adjustment.
Heres a picture of my "Triangulated Wishbone" setup - needs to be finished with more brackets on the bottom links but it an in progress picture. Thanks to Fab32 for the idea!
Here's a triangulated rear that my buddy put under his 27 T, it has ¼ elliptic springs as part of the link and ***anium landing gear struts from military junk yard as top links. It worked great but he sold the car pretty quick so I don't know how it held up in the long run.
Hell I don`t know! I was told that the 4 link housing bracket completly wraps around the housing, and the 4- bar only welds to the front of the housing. Also the 4 link bars are more seperated in height. 4 links are much stronger and will handle much more torque!
technically a 4 link is heavier duty and fully adjustable parallel set up like the ones in a drag car. 4 bars are lighter duty 4 links with little or no adjustment like in a hotrod streetrod or minitruck. both are are commonly called 4 links though the only time ive ever heard the term "4 bar" was on TRUCKS TV when he was discussing the rear setup for his hemi powered international pick up
A simplified explanation 'borrowed' from http://www.worldcastings.com/new/feature0401.shtml " Basically, the difference between the two is this: With a four-bar the upper and lower links are fixed and parallel. While this offers the least resistance to suspension movement, it's not the best for weight transfer and has a negative impact on traction. On the other hand, the angle of the bars of a four-link are adjustable, and are often closer at the front than at the rear. In a nutshell, this is how they work. Think of two lines drawn along the upper and lower bars. Where they meet is the length of the lever the rear end has to try and lift the car under acceleration. In the case of a parallel four-bar, the lines never meet, but now imagine the angle of the upper and lower bars of a four-link are such that the lines meet at the bellhousing. Under acceleration the four-links try to lift the car at that point and weight is transferred to the rear wheels. " CC