Looking at an advert for Magnum front hairpins made me think of a solution to the problems caused by using hairpins on a rear axle. Use typical 4-bar style mounts on the axle and attach the hairpins using urethane adjusters on all three ends. This should provide both a modicum of roll-control and possibly enough flex in the system to prevent the axle or frame mounts from cracking due to suspension articulation. Question is will there actually be enough give in this setup to****ure that the frame/axle mounts will live long and prosper? Ignore this if it has already been mentioned in previous posts.
I doubt it very much. The amount of rubber required would be huge. For the body to roll,the front end of one of the hair pins has to go up while the other is going down.
I'm doing that exact thing on the back of my 27 roadster. The mounts are 4 bar welded on an 8" and the "hairpins" I made by welding the two bars together with the top one being longer and attaching to the frame with urethane adjusters. 1800 miles and no problems yet.
[ QUOTE ] For the body to roll,the front end of one of the hair pins has to go up while the other is going down. [/ QUOTE ] Well, no. You have a small amount of flex in the bushes where the hairpin connects the axle, so each seperate joint can flex back, or forwards, to save the front having to go up or down.Only has to move a little bit, and it gives you a sort of anti-roll effect into the bargain.
The Jalopy Journal
