Do Rear Upper and Lower Control Arms Really Make a Difference? - MustangForums.com



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Old 10-10-2013, 02:05 PM   #1
maxmustang
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Default Do Rear Upper and Lower Control Arms Really Make a Difference?

Will these 99 dollar Rear Lower Control REALLY help with my cornering and launch? And would I have to buy the upper control arms as well?

http://www.americanmuscle.com/sr-lca-0514.html
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Old 10-11-2013, 12:15 PM   #2
AMDanBailer
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Quote:
Originally Posted by maxmustang View Post
Will these 99 dollar Rear Lower Control REALLY help with my cornering and launch? And would I have to buy the upper control arms as well?

http://www.americanmuscle.com/sr-lca-0514.html
Absolutely! The stock control arms have a ton of slop in them and will cause some wheel hop and won't let you put the power you currently have down to the ground.

A set of SR Performance Upper & Lower Control arms will definitely do the trick. You'll notice big gains in your 60 ft time, less wheel hop and much better traction. The UCA will also let you adjust your pinion angle, if your Mustang is lowered or you have plans to lower it this is must have. If not, your pinion angle will be off and you could experience some vibrations.

I hope this helps! Please let me know if you have any questions or need some assistance.

-Dan
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Old 10-11-2013, 12:23 PM   #3
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The biggest impact the arms have by replacing them are the type of bushing material they use. OEM (Stock) use rubber. Rubber is great for reducing NVH and a comfy cushy ride but it also leads to a lot of slop like AMDan said.

Polyurethane bushings have long been used to reduce that bounciness but at the cost of increasing NVH and making things a bit rougher. To the performance enthusiast this is normally a minimal negative to what is otherwise a significant positive (better handling).

For better corning ability (and depending on your budget) you should really look at a Watts Link system.
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Old 10-11-2013, 04:10 PM   #4
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Originally Posted by AMDanBailer View Post
Absolutely! The stock control arms have a ton of slop in them and will cause some wheel hop and won't let you put the power you currently have down to the ground.

A set of SR Performance Upper & Lower Control arms will definitely do the trick. You'll notice big gains in your 60 ft time, less wheel hop and much better traction. The UCA will also let you adjust your pinion angle, if your Mustang is lowered or you have plans to lower it this is must have. If not, your pinion angle will be off and you could experience some vibrations.

I hope this helps! Please let me know if you have any questions or need some assistance.

-Dan
If my car isn't lowered should I still buy the upper control arm?
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Old 10-15-2013, 01:38 PM   #5
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I've bought 3 sets of those very same LCA's. Wheel hop = gone. Launches are definitely better. As you are not adjusting the height of the car, there should be no need to use an UCA because the pinion angle of the drive shaft is not changing one bit. That being said, I've also lowered every car that I've done LCA's on to varying degrees, have never gotten any vibration nor have I gotten the pinion angle out of spec.
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Old 10-18-2013, 07:37 PM   #6
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The UCA helps just as much as the lowers. Anytime you upgrade the soft rubber OEM bushings, it's an improvement.
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Old 11-23-2013, 03:15 AM   #7
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Which LCA do you recommend?
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Old 11-23-2013, 09:07 AM   #8
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Quote:
Originally Posted by AFMarksman View Post
Which LCA do you recommend?
i have these from bmr:

http://www.bmrsuspension.com/?page=p...&productid=156
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Old 11-23-2013, 09:28 PM   #9
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Which LCA do you recommend?
Here's what I'm running, and they work quite well. Plus they're Made in America and they carry a Lifetime Guarantee:

http://www.uprproducts.com/mustang-c...ushing-05.html
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Old 11-25-2013, 03:17 PM   #10
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I'm running these at the bottom:

http://www.latemodelrestoration.com/...r-Control-Arms

This one on top:

http://www.latemodelrestoration.com/...er-Control-Arm

Fit is perfect and ride is not too harsh but definitely harsher than before. Car feels much better now but then again I also went with Koni STR.T shocks which make a world of difference.
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