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Old 01-24-2012, 08:07 PM   #1
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Rear control arms

I've read to use urethane bushing arms on the lowers and poly on the uppers since I can't find urethane uppers is poly ok?
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Old 01-24-2012, 08:38 PM   #2
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Re: Rear control arms

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Originally Posted by jwhayne0001 View Post
I've read to use urethane bushing arms on the lowers and poly on the uppers since I can't find urethane uppers is poly ok?


Polyurethane is a bit stiffer and tougher.
It may make the ride a bit rougher, but it will likely help the car suspension perform better.
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Old 01-24-2012, 08:41 PM   #3
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Doesn't polyurethane hurt torque boxes? I've heard it can rip/deform them and that's why they recommend urethane for lowers or is this just a myth?
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Old 01-24-2012, 08:53 PM   #4
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Re: Rear control arms

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Doesn't polyurethane hurt torque boxes? I've heard it can rip/deform them and that's why they recommend urethane for lowers or is this just a myth?
It will make the "hit" harder, but if you are not constantly launching the car at 3000+ RPM on Drag Radials or Slicks I don't think you will have any issues.
If you are worried about it just install a torque box reinforcement kit.
They are not overly expensive (around $90 I think) and you won't have to worry about them anymore.
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Old 01-24-2012, 09:33 PM   #5
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Quote:
Originally Posted by Trojan Horse

It will make the "hit" harder, but if you are not constantly launching the car at 3000+ RPM on Drag Radials or Slicks I don't think you will have any issues.
If you are worried about it just install a torque box reinforcement kit.
They are not overly expensive (around $90 I think) and you won't have to worry about them anymore.
I planned on reinforcements and subframe connectors with the uppers and lowers trying to beef it up a little an it's a daily driver with the occasional hard launch and fun back roads, any word on the SVE arms on LMR or the BBK arms on American muscle?
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Old 01-24-2012, 09:44 PM   #6
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Quote:
Originally Posted by jwhayne0001

I planned on reinforcements and subframe connectors with the uppers and lowers trying to beef it up a little an it's a daily driver with the occasional hard launch and fun back roads, any word on the SVE arms on LMR or the BBK arms on American muscle?
I got the sve upper and lowers on mine and the springs I Jus don't have the subframe connecters on...heard that the subframe connectrs will make the ride very stiff and un comfrontable so that's why I didn't put them on...is that true? What is the benafits from the subframe connectors?
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Old 01-24-2012, 09:46 PM   #7
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I've heard it's rough but it stiffens up the flex in the middle of the car how's the SVE arms working out? Durable?
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Old 01-24-2012, 09:51 PM   #8
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Quote:
Originally Posted by jwhayne0001
I've heard it's rough but it stiffens up the flex in the middle of the car how's the SVE arms working out? Durable?
I just put UPR's on my car upper and lower and my car launches so much better s
And they also seem like a very solid control
Arm I was highly impressed by the performance gain
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Old 01-24-2012, 09:57 PM   #9
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Quote:
Originally Posted by jwhayne0001
I've heard it's rough but it stiffens up the flex in the middle of the car how's the SVE arms working out? Durable?
Ok...I like them they helped mine from kicking out so much when I go from a dig...the launch is very controled...seem like they'll last.i recommend them.and they are pretty red 2 lol I bought the kit from lrs
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Old 01-24-2012, 10:04 PM   #10
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Quote:
Originally Posted by mystang50

Ok...I like them they helped mine from kicking out so much when I go from a dig...the launch is very controled...seem like they'll last.i recommend them.and they are pretty red 2 lol I bought the kit from lrs
Yeah the red had me sold for mine, I was just skeptical over the price
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Old 01-24-2012, 11:10 PM   #11
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Re: Rear control arms

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Originally Posted by jwhayne0001 View Post
I planned on reinforcements and subframe connectors with the uppers and lowers trying to beef it up a little an it's a daily driver with the occasional hard launch and fun back roads, any word on the SVE arms on LMR or the BBK arms on American muscle?
The sub-frame connectors will make the car ride a bit rougher, BUT what you are getting rid of is body flex which won't do your car any good in the long run anyways. They will also improve the car's handling significantly.


I don't know about the SVE or BBK Control Arms.
I use an old set of Southside Machine Lift Bar lowers and I couldn't be happier with them.
They really plant the tires into the pavement.


They are now being manufactured under the UMI Lift Bars name if you are interested.
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Old 01-24-2012, 11:17 PM   #12
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Re: Rear control arms

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Originally Posted by Trojan Horse View Post
The sub-frame connectors will make the car ride a bit rougher, BUT what you are getting rid of is body flex which won't do your car any good in the long run anyways. They will also improve the car's handling significantly.


I don't know about the SVE or BBK Control Arms.
I use an old set of Southside Machine Lift Bar lowers and I couldn't be happier with them.
They really plant the tires into the pavement.


They are now being manufactured under the UMI Lift Bars name if you are interested.
+1 I miss my southside bars, I'm gonna make my current lca's into them though
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