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Ford Racing Boss Springs

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Old 3/21/13, 07:55 PM
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Originally Posted by Brandon302
Why have you guys wanted to only lower the rear? I would think from a performance standpoint you would want to also put the P springs on the front so that you have springs that have complimentary rates.
The reports from the field are that P springs on the front only drop the Boss about 1/4".

Besides, in my opinion, the driving experience of the Boss on the car's OEM front linear springs is unsurpassed.
Last edited by four-walling; 3/22/13 at 09:06 AM.
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Old 3/21/13, 07:58 PM
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Originally Posted by four-walling
The reports from the field is that P springs on the front only drop the Boss about 1/4".

Besides, in my opinion, the driving experience of the Boss on the car's OEM front linear springs is unsurpassed.
This is true it doesn't drop it much but I can tell the front it stiffer, don't you have to buy the springs as a set of 4 anyway?
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Old 3/21/13, 08:03 PM
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Ford springs, yes. Other suppliers, no. For example, I believe Steeda sells just rear springs.

I just like all of the suspension parts coming from the same company.
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Old 3/21/13, 08:27 PM
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Originally Posted by four-walling
Ford springs, yes. Other suppliers, no. For example, I believe Steeda sells just rear springs.

I just like all of the suspension parts coming from the same company.
Makes sense, since the springs are made to compliment each other. I really need to find the spring rates for the P springs to see if they are any different then the stock Boss springs and the T springs that are coming out.
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Old 3/22/13, 03:26 AM
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Originally Posted by four-walling
Probably referring to the Ford Racing M-5300-P spring. I just had a set installed today also on the rear only of my Boss:

Do you have a before picture to go alongside the after posted?
Thanks.
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Old 3/22/13, 08:49 AM
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Originally Posted by SvtRide
Do you have a before picture to go alongside the after posted?
Thanks.
before and after:

Name: prelower_zps8cdec0e2.jpg Views: 234 Size: 99.2 KB

Name: 7662fa9f-fb58-4394-a4c0-d9c07f8f2a21_zpsb804d32a.jpg Views: 346 Size: 49.5 KB

slightly different angle on the pics, but the change is clear.
Last edited by four-walling; 3/22/13 at 08:58 AM.
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Old 3/22/13, 11:47 AM
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Originally Posted by Brandon302
Makes sense, since the springs are made to compliment each other. I really need to find the spring rates for the P springs to see if they are any different then the stock Boss springs and the T springs that are coming out.
Brandon, I agree - I wish the spring rates were published, can't make a fair comparison without that information.

Kerry, pictures really show the change. I just hate how high the rear of the car sits. Love the wheels too!
Last edited by MustangFanatic; 3/22/13 at 11:50 AM.
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Old 3/22/13, 05:05 PM
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Originally Posted by four-walling
before and after:





slightly different angle on the pics, but the change is clear.
Yep. Definitely notice the difference. I like. Thanks for posting the evidence. See what you started. Just ordered the M5300-P springs, adjustable pan hard rod.
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Old 3/22/13, 06:33 PM
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You will also need the M-5570-A jounce stops or trim the ones that came on the car.

Congrats!

http://www.fordracingpartsdirect.com...p/m-5570-a.htm
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Old 3/27/13, 07:10 AM
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Originally Posted by four-walling
You will also need the M-5570-A jounce stops or trim the ones that came on the car.

Congrats!

http://www.fordracingpartsdirect.com...p/m-5570-a.htm

Hey Kerry,
At the link you provided, it says "Original Equipment on 2012-2013 Shelby GT500" in the description. Does that mean the Shelby has the P-Springs from the factory and sits lower than the Boss?
Brian
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Old 3/27/13, 08:33 AM
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The jounce stops were the original equipment on the 2013 GT500. Don't know about the springs-you will need to visit the Shelby boards.
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Old 4/24/13, 09:47 AM
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I too very interesting in learning more about M-5300-T springs for the Boss
I have the Eibach prokit springs
Should anyone find out the spring rates for these T springs please post
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Old 4/24/13, 06:14 PM
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Originally Posted by Brandon302
Makes sense, since the springs are made to compliment each other. I really need to find the spring rates for the P springs to see if they are any different then the stock Boss springs and the T springs that are coming out.
springs nor shocks are made by ford ... only matched/tuned for generally acceptable performance, not custom tuned nor max performance

still fun and they match
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Old 4/24/13, 06:34 PM
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Originally Posted by tlflow
springs nor shocks are made by ford ... only matched/tuned for generally acceptable performance, not custom tuned nor max performance

still fun and they match
I recognize that, but I am sure they are made to a certain spec for the Ford.
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