Upper rear control arm bushing help
Guys, I went for a drive in my Chevelle last weekend, weather was great here. Picked up the boy from baseball practice, and we all three (me, the wife, and Brandon) went to dinner. Car ran great, except I had a serpentine belt issue, but that’s totally unrelated to this question. Got on it a couple good times, taking it to rev limiter in first twice, which is 7800. Car is putting 616 hp/525 tq to tires currently on a poorly done street tune, again that’s a different sermon, for a different day.
Anyhoo, I get car back home, washed, dried, and back up on lift in shop where it stays with a cover on it, and I’m doing a visual underneath the car. To my surprise, my upper rear control arm bushings at the 12-bolt are both destroyed. I’m talking virtually gone. Looks like they exploded? They were poly, along with all my other rear control arm bushings. My question here is: I’m guessing I’m binding back there, but where? I’ve searched the net for similiar situations and I can’t find anybody dealing with this. My rear control arms are CPP, and of course it’s all new stuff. Is this a setup issue? Anybody ever see this before? I did read over on TeamChevelle that maybe I should go rubber bushings up top, if I’m running poly lowers, to keep from binding. I just don’t understand the binding part. When I was building the car, in mock-up stage, I cycled the rear through its motion up and down, with coil overs off, and just bare housing, and it sure didn’t feel like anything was binding. What am I missing here?
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