LCA Bushings and Other Bushings
Do your bushings slip fit on your pins, then slip in the LCA? Or is a press required?
The Delrin bushings are a press fit into the LCA, similar to the old style bushings. The Delrin replaces the original outer shell. The pivot pins are then a tight slip fit into the bushing. Maybe a little tighter than with the poly bushing/pin, but that will depend on the pin you use. Mine were a very tight slip fit, but still a slip fit. Just like the poly bushings, the Delrin bushing will rotate on the pivot pin.
“There's no reason for it, and it would add another arc that moves perpendicular to the motion of the LCA, so, it would just add more binding”
Not if the strut pivot is in line with the centerline pin in the lca
View attachment 1715739517
What are you attaching the extra rod to? The strut rod or the K frame?
If it’s attached to the K frame, the end that attaches to the LCA will still track in an arc as it moves up and down because it’s fixed at one end and free at the other. And because it’s perpendicular to the LCA, the LCA moves straight up and down relative to that rod. The further the LCA moves up and down, the more arc the additional rod will travel in, pulling and pushing on the LCA.
If you’re triangulating between the strut rod and the LCA, you have to realize that the strut rod and LCA are not the same length. So, the end attached to the original strut rod and the end attached to the LCA will not move the same distances up and down.
The ball joint on the LCA travels in an arc perpendicular to the frame as the LCA moves up and down. The end of the strut rod travels in an arc perpendicular to its attachment on the K frame, which is at an angle to the ball joint arc. The LCA and strut rod are not equal length. That’s why checking for binding and tuning the length of the strut rod is necessary with the adjustable strut rods, you have to manage those arcs for the suspension travel range on YOUR car. So adding an extra strut, without adding binding, is a complicated affair.
And, there’s no need for it. There’s only one person here that thinks the strut rod doesn’t adequately control the forward and backward motion of the LCA on the pin. And he’s wrong.
I’ve spent a lot of time tuning the length of the strut rods on my cars as I’ve made changes to my LCA bushings, my LCA’s, my UCA’s, etc. Every time I make a significant change to my suspension I check for binding. A properly adjusted strut rod length does not allow the LCA movement described by OMM. If it did, my alignment would change every time I stepped on my brakes. Instead, my alignments hold without any issue. Not to mention, the wild swings in caster angle would make the car a beast to control with 275’s up front.
