Discussion Starter · #1 ·
im a bit confused, is it the uca or lca or both that bind when aftermarket arms are used? im looking into getting a set of the umi performance uca/lca combo.
The combination of the stock arms with stock bushings in upper and lower allow the "necessary" flex. So, if you put stiff bushings in the stock arms you lose some bushing difflection, but the arms can still flex. If you put stock bushings in tubed or boxed arms you lose the arm flex but the bushings will still offer some compliance.is it the uca or lca or both that bind when aftermarket arms are used?
This is an interesting statment. What "ability to move" do they have that all the other arms on the marked don't. It looks to me that the UMI arms are of a very basic design... very similar to BMR's. I'm not trying to say they are not built well... but I don't see anything unique about themthe umi uca's are a good one !! they have the ability to move the way they should with out binding so get them !!!!
This is an interesting statment. What "ability to move" do they have that all the other arms on the marked don't. It looks to me that the UMI arms are of a very basic design... very similar to BMR's. I'm not trying to say they are not built well... but I don't see anything unique about them </font>[/QUOTE]I think he is referring to our upper control arm's that are offered with spherical rod ends. I do not of an item like this listed on BMR's site, just an adjustable upper with polyurethane bushings.Originally posted by Rustic:
The rear suspension is a "triangulated 4-link"... with the upper arms providing the "triangulation." The angle of the uppers keep the rear end from moving side to side, and the lower arms (with some help from the uppers locate the rear end front to back. The uppers are shorter than the lowers.also when does this bind occur? severe cornering? like autocrossing/road racing or during everyday driving? highway canyon carving?
For most situations, the stock arms are fine... and new bushings may freshen them up. But most all of the aftermarket arms are a huge improvement in lateral stability and prevention of wheel hop. As long as you keep a stock bushings in your differential mounts... you will most likely keep the "bind at bay." But again, in normal driving, bind isn't a huge issue anyway.... but it will ruin bushings.what would you recomend on a daily driver? stock UCA's?
The spherical rod ends are a very good cure for rear end bind. This is why we offer this arm; it not only offers free movement through out the rear end but also allows adjustability when needed. We have found the QA1 Eudura series rod ends very street able and find no harsh ride from this item. Unlike less expensive rod ends these rod ends are supplied with a Teflon lining that prevents metal to metal contact. The Teflon lining is also oil impregnated so the bearing is self lubricating. This helps to prolong life as well as reduce road noise. We recommend these arms for any street driven car.Originally posted by Rustic:
A spherical rod end like that is a great part for a race car... it allows freedom of movment and is a solid connection. But it may be a bit harsh for a street/daily driver car. If you use a stock rubber bushing at the diff. end of that upper arm it will help take out the harshness. That same stock rubber bushing will help prevent bind.