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-   -   Rear control arm upgrade (http://chevelleforum.net/showthread.php?t=257)

rak1 03-16-2010 04:42 PM

Very nice! I went with Global West and everying is black; the red really stands out!!

Hank70SS 03-23-2010 09:15 AM

Derek, any preference on these rear upper control arms, UMI-4017 or Edelbrock EDE5248?

http://www.cs3automotive.com/index.php

EDIT: Or maybe the UMI-4037. They have a roto-joint, greasable delrin race. If the race wears it can be adjusted or replaced. No metal to metal like the 4017 spherical rod ends.

Derek69SS 03-23-2010 11:36 AM

not sure which arms you're looking at there, as that link just goes to their homepage...

Basically, anything with spherical joints will allow the suspension to function properly without binding, especially in the upper arms. Rod-end type joints do wear out and get noisy in about 20,000 miles. Anything with a Johnny Joint (Currie) or similar (Edelbrock, UMI roto-joint, etc) will both provide the great performance AND long-lasting durability.

Polyurethane bushings really bind up the rear suspension, and should be avoided in the upper arms.

Hank70SS 03-23-2010 12:44 PM

Quote:

Originally Posted by Derek69SS (Post 7080)
...Polyurethane bushings really bind up the rear suspension, and should be avoided in the upper arms.

Even with spherical joints on one end or you mean poly on both ends? If I get the arms, say the UMI with roto joint I thought I would put poly in the housing. The joint should provide plenty of movement.


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