I understand the issue of flex at the body/ subframe and tying the front and rear together. But isn't that what we are trying to do?
In other words, with a solid frame, typically, rubber was used from the factory. If the connectors are not welded to the floor pan, should I still stick with solid or poly mounts?
I just want to stiffen up things a bit. Vert with a bit more power than stock.
Dave
With a solid frame from the factory (which I am assuming you mean a full-frame), the whole frame is isolated from the body structure with mounts. With subframes and connectors, you are either bolting or welding to the rear, which has no isolation, and then connecting to the front with the bushings of your choice. Not the same as the full-frame setup.
Note on modern cars the entire subframe is integrated in the body without isolators. This is more like the solid bushings with subframe connectors.
Poly will last much longer than rubber, but it won't last forever. Just do solid and never look back. There is no reason not to.
P.S. One guy on another forum used polygraphite and complained of squeeking noise after installing connectors.
Note, be careful as some people on the thread switched confused the original intent which was body bushings as opposed to control arm bushings. If you see Del-A-Lum or Delrin they are talking about control arms.
