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Old 11-05-2017, 03:40 PM   #1
Hartz4
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Lowering springs, where did I go wrong?

I have a 2004 Mach 1. I wanted about a 1" drop, nothing drastic. I did my research, so I thought, and decided on the Ford Performance M-5300-C springs.

According to several websites the estimated drop for 99-04 mustangs is 1-1/8" in front. I found reviews that said on a Mach 1 the drop was about 1". Perfect!

I just completed installing the BBK caster camber plates with the BBK isolators and the M-5300-C springs, fronts only.

I am only seeing about 1/2" drop.

I'd be happy with a 3/4" drop but, only 1/2". What did I miss?

I am hesitant to install the rears because I don't want the rear end to be lower than the front.
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Old 11-05-2017, 04:10 PM   #2
falcongtho3
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Re: Lowering springs, where did I go wrong?

The Mach 1s were lower than GTs from the factory, so non-Mach 1 figures wouldn't apply.

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Old 11-05-2017, 05:11 PM   #3
DSG2003Mach1
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Re: Lowering springs, where did I go wrong?

Are the bbk isolators thicker than stock? Are you sure the pigtails of the springs are seated correctly?
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Old 11-05-2017, 05:33 PM   #4
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Re: Lowering springs, where did I go wrong?

You used poly urethane isolators. They're thicker than factory rubber and also don't compress at all. Put the factory isolators in and it ought to come down some.
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Old 11-05-2017, 06:15 PM   #5
Hartz4
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Re: Lowering springs, where did I go wrong?

Thanks for the options. I'll make sure everything is seated correctly. My oem isolators are in still in good shape I'll try them also.
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Old 11-05-2017, 07:08 PM   #6
littlemags
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Re: Lowering springs, where did I go wrong?

yeah...for sure use the factory iso's...
I used the same springs before i changed to coilovers
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Old 11-06-2017, 03:56 PM   #7
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Re: Lowering springs, where did I go wrong?

Really? C springs and poly iso's.. lol why even bother..
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Old 11-09-2017, 09:44 PM   #8
03Shadow Grey
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Re: Lowering springs, where did I go wrong?

Falcon is right. I contacted Volgland when I was considering them and they confirmed most drop spring numbers are 1/2 inch less when it comes to the Mach since its already that much lower then the GT it will also work on. I ended up cutting 3/4 coil out of the front and sportlined the rear.

Last edited by 03Shadow Grey; 11-09-2017 at 09:44 PM. Reason: spelling
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