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Old 02-16-2010, 06:25 AM   #1
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Suspension Upgrade

Hey all, have a question, I am looking into upgrading my suspension to handle the added horsepower of the supercharger. What is the best for the price upgrade that will help stop the side to side swapping that occurs so easily. I talked to a guy at the local ford shop and he told me Steeda springs would do the trick and that would be great if that’s true (cheap). I would appreciate any feed back.
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Old 02-16-2010, 08:18 AM   #2
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Re: Suspension Upgrade

if you just want to fix the "spongy" feeling you have then you can try items until you get to that point.

Lowering springs (that are stiffer else its worthless for helping your issue) may help but I feel you are going to need upgraded lower control arms to help it as well. You can try springs (which are a great mod anyway) and go from there.

Install is pretty darn easy, im not up on my spring rates for 05+ but just make sure they are a good rate (not the stock rate) and such. Perhaps someone can chime in as to what rate works good for a daily driver (is your car a daily driver?)
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Old 02-16-2010, 08:56 AM   #3
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Re: Suspension Upgrade

Yes my car is a daily driver, so I don't want a bone jarring ride, only better handling and less side to side swapping when I get on it.
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Old 02-16-2010, 12:36 PM   #4
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Re: Suspension Upgrade

Could be a combination of things contributing to the swing. Springs, shocks/struts,RLCA,Tires, etc). All designed from Ford to be compliant on the street. The key will be to figure out how far you want to go with your street ride.

For street driving, I would stay more towards the street version of springs (Eibach pro-kit, H&R sport). I have also heard good things about the Steeda springs, but have not tried them personally. These springs will give you a moderate drop and firm up the ride, but not bone-jarring. You can go further from there for more of a drop or firmness (H&R Race for example), but you may not like it on the street (rubbing and harshness).

When lowering the 05+ mustang, you will notice that the rear-end will swing out slightly to one side (maybe 1/2 to 3/4 inch). Some people don't notice it at first and others can live with it. This can be corrected by the use of an adjustable panhard bar.

Ford also uses a strut mount on top of the front struts. Mostly, these are a 1 time use item and usually will fall apart when you dismantle the front struts to replace the springs. If they stay together and reused, they are likely to cause a 'popping' noise when going over bumps. You can roll the dice and keep the originals. You may get lucky (some people do), but I would, at a minimum, plan on replacing those at the same time. (probably about 70-80 bucks). An alternative that I recommend is to replace these with Caster-camber plates. This eliminates the strut mount, gains back some lost suspension travel, and will allow you to re-align the front-end to spec. Depending on the drop, you might not need the CC plates to align the front-end and could possibly get by with just camber bolts, but I think the other benefits of the CC plates make it a good choice and factoring in not replacing the strut mounts adds about $200 to the cost. If you don't go with CC plates, plan on replacing the strut mounts (again) if you swap out shocks/struts later.

RLCA are a love-hate relationship. They will help with the problem, but are noisy. You will hear and feel additional harshness from the drivetrain. I personally don't have them on my street car for this reason. We do however have them on our other car that is primarily track-use. As mentioned above, you could try the springs first and add the RLCA later, but just be prepared for the noise/harshness when you do.

My 'lowering package' recommendation is CC plates, springs, and adj. panhard bar, but that may be a little more than your planning on (~$675). The panhard bar can be added later, but if you are considering the CC plates, you should do that at the same time as the springs as you will have all of it apart anyway for the spring swap.
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Old 02-16-2010, 12:57 PM   #5
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Re: Suspension Upgrade

This is good information, and what I am looking for, at first I was planing on putting roush stage 3 suspension or even ford FR3 on but the cost is high for both of those options. I am also looking to put GT500 wheels and tires on my car - Front Tire size is 255 x 45 x ZR18 - Rear Tire size is 285 x 40 x ZR18. I hope this helps a little also.
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Old 02-16-2010, 01:01 PM   #6
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Re: Suspension Upgrade

it should help if the stock tires have a taller sidewall as a lower stiffer sidewall will do quite a bit.
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Old 02-16-2010, 01:41 PM   #7
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Re: Suspension Upgrade

Does anyone know what comes with the track pack upgrade from ford if you order it on a GT and what the cost of that might be.
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Old 02-16-2010, 02:01 PM   #8
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Re: Suspension Upgrade

For 2010, I think the track pack has front and rear stabilizer bars from the 2009 Shelby GT500, 19-inch Pirelli P Zero P255/40ZR-19 summer tires, and revised struts and shocks ($1,495 option)

Ford Racing offers the FR3 handling pack which is Front and Rear shocks/struts, Front and Rear Lowering Springs, Front and Rear Sway Bars, and Front Strut Tower Brace (about $1300)
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Old 02-16-2010, 03:09 PM   #9
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Re: Suspension Upgrade

Wow that is quit a bit even before install and alignemnt, I was hoping to improve the handling for less. I will have to go about it in steps, I might end up spending the same in the long run but hope not.
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Old 02-16-2010, 04:10 PM   #10
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Re: Suspension Upgrade

springs 250
lower control arms 350
caster/camber plates 300 (may not need depending on alignment specs)
shocks/struts 450
panhard bar (not 100% needed but recommended to readjust the rear) 250

im pulling these prices out of the air so i may be off just a guess

install is easy, im sure you can handle it all.
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Old 02-16-2010, 06:10 PM   #11
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Re: Suspension Upgrade

Pretty close estimate. For reference, our lowering kit (CC Plates, Adj panhard bar, and springs) are $675 shipped. Add in a set of Tokico adj shocks/struts and RLCA and it is $1390 shipped.

I agree it is pretty straight forward to work on. The hardest part is getting the strut nut off and you'll probably also want a set of spring compressors and a torque wrench. We can usually do the entire swap in an afternoon with 2 people.
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Old 02-18-2010, 03:59 PM   #12
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Re: Suspension Upgrade

Okay, I'm a dipstick-what is RLCA?
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Old 02-18-2010, 04:04 PM   #13
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Re: Suspension Upgrade

rear lower control arms.
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Old 02-19-2010, 06:40 AM   #14
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Re: Suspension Upgrade

What does it do to change the rear lower control arm, and what effects does changing the other components do.
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Old 02-19-2010, 11:29 AM   #15
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Re: Suspension Upgrade

if you look at your rear axle you will see the pumpkin in the middle, your springs on each side, the springs at the bottom sit on the lower control arms. The lower control arms go from the axle to the frame of the car and are in charge of keeping the rear axle centered front to back. If you notice your panhard bar goes across the back of the pumpkin (a long bar) and it is in charge of keeping your rear end from going side to side.

If you notice its all based on rubber bushings and metal (what the control arms are made of) that is flexible. The panhard wont really give much but the lower control arms metal will flex some.

New lower control arms have stiffer bushings and dont flex keeping the rear end more planted and when it doesnt wiggle you get more traction and better traction etc.

You want a spherical bushing so the rear end as one side raises and the other side lowers it can twist without binding. If you notice how its bolted up without a bushing that allows for twisting (one side up/one side down) then as it tries to raise up it will bind and thats BAD for handling VERY BAD and can make noise etc.

I know maximummotorsports has spherical bushings not sure who else do... dont go with urathane only bushings... Delrin bushings is where its at but generally are expensive.
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Old 02-19-2010, 12:54 PM   #16
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Re: Suspension Upgrade

Thanks, John @NQS !
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Old 02-19-2010, 03:31 PM   #17
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Re: Suspension Upgrade

Good information, I know alot more than I did now, so I get from what I am reading that stiffer lowering springs should do the trick to stop the side to side swapping. I will start there and go further if needed.
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Old 02-20-2010, 04:36 PM   #18
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Re: Suspension Upgrade

bmr traction kit should be all you need. it come with lowering springs, adj camber bolts, strut hats, adj panhard bar, and lca relcoation brackets. i just ordered this kit myself for $630 and i already have bmr uca/lca's.
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