Fox upper control arms

Noobz347

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Because they make money on them, and many people who mod Mustangs really have no idea why they do they things they do. They just think Aftermarket stuff must be better.

The issue is Ford's design introduces a lot of bind. Then you have the mindset that rubber bushings are sloppy, so lets stiffen them up with urethane, and you just make the bind worse and uncontrolled, which can lead to snap oversteer.

The herd mentality is also strong. Hop on Facebook and make a post stating you want to keep your quad shocks on yoru car and see what happens. You'll get 100 posts laughing at you telling you to throw them in the trash and buy aftermarket arms with the stiffest bushings you can find. Nobody wants to actually listen about the correct way to modify a suspension. (which unfortunately is expensive).

The best Fox Mustang rear suspensions do away with the Quadra-link setup and convert to a 3-link, or 5-link setup. With a panhard bar setup you can even try a Poor-mans 3-link setup. Hop on youtube or google and you'll see a ton of info on these setups. EricthecarGuy did an awesome series on installing an entire Max Motorsports suspension setup on his fairlane. I've got most of it on my car other than the torque arm (for now).

But...what are your actual goals with the car? You don't need a torque arm to cruise to local car shows. In fact, the NVH increase from one may be a discouraging factor.

To Add:

It's also no secret that Fox Mustangs became famous by going in a straight line. A lot of the aftermarket reflects that as does the interwebz echo chamber.

It's also no secret that crappy movies have made popular the idea that one suspension setup for the track means it is SuperReallyAwesomeSauce on the street.

:tard:
 
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GalacticPonage

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As others have said just stick to rubber/poly mounted arms. However I like the spherical bushings that press into the axle housing and an adjustable upper with a poly bushing on the body side. This is so you can properly set pinion angle and eliminate bind. That’s what’s on my car and there was no noticeable difference in nvh from the spherical bushing. Some people say the spherical stuff wears out quick on the street from dirt and debris but I’ve head them on for at least 10k miles and they’re as tight as when I bought them
 

revhead347

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Because polyeurethane bushings don't break and bind. That's what 95% of modified Mustang suspensions have. If you are running an SCCA race full out, you MIGHT notice a difference with a spherical to correct the binding issue. On a street car, hell no. You'll never notice it. Buy a quality part, grease it well, it will be fine. I bought my car in 1999, and the control arms I have on it came off the car I had before that. So that's about 23 years on the same set of Steeda polyeurethane bushing control arms. Ken's Cobra has the same control arms put in a few years later. Both sets have well over 100,000 miles on them. My car pulls a 1.6 60' on polyeurethane bushings.

Kurt
 
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ppost

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Because polyeurethane bushings don't break and bind. That's what 95% of modified Mustang suspensions have. If you are running an SCCA race full out, you MIGHT notice a difference with a spherical to correct the binding issue. On a street car, hell no. You'll never notice it. Buy a quality part, grease it well, it will be fine. I bought my car in 1999, and the control arms I have on it came off the car I had before that. So that's about 23 years on the same set of Steeda polyeurethane bushing control arms. Ken's Cobra has the same control arms put in a few years later. Both sets have well over 100,000 miles on them. My car pulls a 1.6 60' on polyeurethane bushings.

Kurt
 

deathb4dismount

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I run the FRPP replacement uppers with rubber at each end and MM heavy duty LCAs. It digs a little better in a straight line and no real increase in NVH. The biggest difference people feel on street car is probably not the arms themselves, but the replacement of the old worn out bushings.
 
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Rt jam

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The real problem is so many do not understand the terminology. "Bind" is misleading. The problem is articulation. It's something that ALL cars will see. Drive your car's 1 rear tire onto a 2x4 piece of wood. There is articulation. The rear axle housing is not parallel to the rear bumper at this moment.

The stock bushings are so soft, they will comply with the tilting of the rear housing. So will a heim joint.

A poly bushing will not so the rear NEEDS to tilt, the arm will follow and since the stiff poly bushing will not comply, it will try to twist the mount. This will be a problem on any 4 link rear suspension, a mid 1 sixty foot drag car, a road race car and even a stock 4 cylinder.
 

revhead347

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To Add:

It's also no secret that Fox Mustangs became famous by going in a straight line. A lot of the aftermarket reflects that as does the interwebz echo chamber.

It's also no secret that crappy movies have made popular the idea that one suspension setup for the track means it is SuperReallyAwesomeSauce on the street.

:tard:
Couldn't have said it better myself. This is exactly what is going on.

Kurt
 
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revhead347

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The real problem is so many do not understand the terminology. "Bind" is misleading. The problem is articulation. It's something that ALL cars will see. Drive your car's 1 rear tire onto a 2x4 piece of wood. There is articulation. The rear axle housing is not parallel to the rear bumper at this moment.

The stock bushings are so soft, they will comply with the tilting of the rear housing. So will a heim joint.

A poly bushing will not so the rear NEEDS to tilt, the arm will follow and since the stiff poly bushing will not comply, it will try to twist the mount. This will be a problem on any 4 link rear suspension, a mid 1 sixty foot drag car, a road race car and even a stock 4 cylinder.
And yet, Steeda managed to put 10 Cobra Rs at the top of the pack in IMSA in the mid 90s with poly bushings. No, they don't articulate perfectly, but I'm not pushing my car anywhere near as hard as they were back then.

Kurt
 

revhead347

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just installed Sphericals from LMR into the upper Axle housing ..was an easy install and they work fine ..no aditional noise, .frame bushing is still poly...but hard to say if this is a upgrade to the Polybushings I was running befor ?? just did it to spend some money and find out..:doh:
Any input on your impression of how it rides would be appreciated.

Kurt