Rear trailing arm bushings
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#8
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#9
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I wont know for a few months after a few more track days to see how they work. For those wondering what we are talking about
http://www.pfadtracing.com/catalog/p...roducts_id/139
You only need two for the rear 2 so you'll have to split a set with someone.
Here is a discussion link.
http://www.cadillacforums.com/forums...ck-mounts.html
http://www.pfadtracing.com/catalog/p...roducts_id/139
You only need two for the rear 2 so you'll have to split a set with someone.
Here is a discussion link.
http://www.cadillacforums.com/forums...ck-mounts.html
#10
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Not sure I'd want to go with 100% on every bushing and mount on a unibody, as you need *some* play or the next item down the line will take the abuse...I suppose if it were a track only car, maybe, but thinking day to day that may get old and you need to lube them (unless polygraphite) or else then you get squeeks...But, sure would be nice to upgrade some of them on this car though. Our chassis' are pretty tight, so we're lucky there.
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Not sure I'd want to go with 100% on every bushing and mount on a unibody, as you need *some* play or the next item down the line will take the abuse...I suppose if it were a track only car, maybe, but thinking day to day that may get old and you need to lube them (unless polygraphite) or else then you get squeeks...But, sure would be nice to upgrade some of them on this car though. Our chassis' are pretty tight, so we're lucky there.
The trailing arms bushings are top shelf though. They have well designed crush tubes and are made from graphite impregnated poly which are proven not to have annoying squeek issues. They also help control the horizontal movement of the rear end under hard braking, cornering and acceleration better than the stock bushings.
#12
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Yeah, polygraphite is the way to go...I wish P-T-S sold a kit or parts for these cars...Had a 'super front end' kit for the 'velle (sold it though before installing ) and was top quality...
I certainly agree the rear diff is overly sloppy, but replacing the bushing with a CS unit, for instance, made a huge difference! I wouldn't mind replacing other bushings in this car with poly (softer duro rating though) if/when they ever become available and the oem ones wear.
So, yeah, certainly a tradeoff...Problem with our cars is GM put softer stuff then needed to be for the "cadillac" ride, although it still rides more like a performance car imo. The worst stuff I had was on my GTO with crappy liquid filled bushings and other skimping they did when they imported the monaro.
I certainly agree the rear diff is overly sloppy, but replacing the bushing with a CS unit, for instance, made a huge difference! I wouldn't mind replacing other bushings in this car with poly (softer duro rating though) if/when they ever become available and the oem ones wear.
So, yeah, certainly a tradeoff...Problem with our cars is GM put softer stuff then needed to be for the "cadillac" ride, although it still rides more like a performance car imo. The worst stuff I had was on my GTO with crappy liquid filled bushings and other skimping they did when they imported the monaro.
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A comparison of the stock mushy rubber bushing vs. the poly Turn in Concepts (TiC) bushing (I was the tester for these).
Stock:
http://www.youtube.com/watch?v=F9xqYqqxRRM
TiC:
http://www.youtube.com/watch?v=3FszcyYLgZo
Stock:
http://www.youtube.com/watch?v=F9xqYqqxRRM
TiC:
http://www.youtube.com/watch?v=3FszcyYLgZo
#14
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just ordered a set of these today will see how they do. But fyi to everyone also got the revshift driveshaft coupler was installed by top cts-v tech and 3 bushings snapped and almost messed stuff up within ten miles. can wait to get these and agree no rubber in drivetrain
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http://creative-steel.com/store/inde...ct_detail&p=34
I have yet to hear any information about them though.
I guess I do not see a whole lot of benifit to the shock bushing, as long as the stock bushing is in good shape, all this would do it let the shock "act" a little quicker instead of compressing the busing first.
The trailing arm bushing on the other hand, i need to get sooner then later.
#19
I'm not sure deflection in the twisting direction really proves anything. Obviously if the bushing is actually worn out, then that should be replaced.
I've been through this kind of thing in B-body land. "Omg, the stock control arms are just stamped U channel and twist so easily! Junk!"
Amazingly, not everyone on the internet understands suspension, and in the case of the B-bodies, failed to understand how the 4-link with triangulated upper arms for lateral location is supposed to work. What they got with boxed arms and poly bushings was dramatically increased stress on the frame, and suspension bind on roll. Worst of all, the increased bind was perceived as a handling improvement, because, as I mentioned, it increased rear roll stiffness.
I've been through this kind of thing in B-body land. "Omg, the stock control arms are just stamped U channel and twist so easily! Junk!"
Amazingly, not everyone on the internet understands suspension, and in the case of the B-bodies, failed to understand how the 4-link with triangulated upper arms for lateral location is supposed to work. What they got with boxed arms and poly bushings was dramatically increased stress on the frame, and suspension bind on roll. Worst of all, the increased bind was perceived as a handling improvement, because, as I mentioned, it increased rear roll stiffness.
#20
I guess calling them rear lower knuckle control arm bushings wasn't as catchy huh? lol
Reading the description on their site, it says they come out with a C-clamp? I thought those were tighter press fit bushings. Hmmm.
Am I just cheap or does $75 seem a little high? No offense to the makers.....I'm still looking at them.
Reading the description on their site, it says they come out with a C-clamp? I thought those were tighter press fit bushings. Hmmm.
Am I just cheap or does $75 seem a little high? No offense to the makers.....I'm still looking at them.