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Old 01-28-2012, 08:32 AM   #1
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rear suspension

Lookin into gettin rear control arms n shocks for my 1991 gt. It's my daily driver but I'm plannin on playing at the track some. Any suggestions or tips? Like brand and type.
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Old 01-28-2012, 11:57 AM   #2
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Re: rear suspension

There are alot of manufacturers, look in a Summit or Jegs catalog and they both have a section on Mustangs and the control arms are in it. I have BBK s on mine. Which ever you get though, I would buy some type of torque box reinforcements, which are also in the catalog and arent too expensive.
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Old 01-28-2012, 10:40 PM   #3
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Re: rear suspension

My favorite lower control arms are the old Southside Lift Bars. They really plant the rear tires into the pavement. They are now being manufactured once again by UMI Lift Bars.
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Old 02-02-2012, 04:40 AM   #4
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Trojan horse can uvexplain how the lift bars work?
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Old 02-02-2012, 11:28 AM   #5
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Re: rear suspension

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Originally Posted by robert3188 View Post
Trojan horse can uvexplain how the lift bars work?


From UMI:
"Lift bars are designed to work with axle torque to load the chassis of the car, forcing the rear wheels downward while pushing the tires into the ground for harder launches and improved 60-foot times. These bars are designed to greatly improve traction and reduce wheel hop."


Basically they use the axle torque and instant center relocation to force the tires down onto the pavement harder than factory control arms can.


Did you notice that the rear axle mounting point is lower than normal aftermarket control arms?
This changes the "instant center" of the car moving more weight rearward to help plant the tires harder. See picture below.
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Old 02-02-2012, 06:08 PM   #6
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Awesome. Should I get the torque box reinforcements? And would u put these on a ed?

---------- Post added at 06:31 PM ---------- Previous post was at 06:30 PM ----------

Sorry. I meant dd?

---------- Post added at 07:08 PM ---------- Previous post was at 06:31 PM ----------

And... Do mustangs come with factory rear sway bars. Mine has one on it. Goes from one lca around the rear to the other lca. Sorry so many questions.
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Old 02-02-2012, 06:12 PM   #7
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Re: rear suspension

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Awesome. Should I get the torque box reinforcements? And would u put these on a ed?

---------- Post added at 06:31 PM ---------- Previous post was at 06:30 PM ----------

Sorry. I meant dd?
Yes and yes.
With the torque box reinforcements it will be fine.


Note: Because they use metal bushings (for faster, better response and easier suspension movement) instead of rubber or urethane, you might notice a bit more suspension noise.


I do not notice any noise in my 86 GT, but the exhaust is pretty loud, so that may be why.
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Old 02-03-2012, 06:37 PM   #8
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One more question.... . Do they have them lift bars that will lift the rear up? Like i bought wide wheels n tires n don't want a chance of the tire gettin into the fender. I was thinkin the back could go up an inch to assure clearance.
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Old 02-03-2012, 06:52 PM   #9
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Re: rear suspension

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One more question.... . Do they have them lift bars that will lift the rear up? Like i bought wide wheels n tires n don't want a chance of the tire gettin into the fender. I was thinkin the back could go up an inch to assure clearance.
Not sure what you are talking about.
If you install coilover rear shocks you can adjust the height.


For rear wheels around 10" wide and 295/50/15 tires you want a 6.5" backspacing.
Even then you will have to do some clearancing on the inside of the wheel well and probably roll the fender lip.


You want to keep the wheels tucked in as much as possible and not raise the back of the car.
Raising it just makes it that much harder for it to transfer weight if you plan to drag race it.
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Old 02-03-2012, 07:21 PM   #10
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Ok. Guess I will just roll the fenders. My buddy has the expensive nice roller. Any tips on that?
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Old 02-03-2012, 07:32 PM   #11
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Re: rear suspension

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Ok. Guess I will just roll the fenders. My buddy has the expensive nice roller. Any tips on that?
If he has the one that attaches to the rear axle, then you got it made.
I always warm up the lip as much as possible with a heat gun or hair dryer.
Warm paint is less likely to crack.
Other than that take your time and roll it in stages not all at once.
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