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Lowering GT350R ...is it worth it? (Eibach, FP and BMR)

hiiammarcin

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So this is a two part question.
1. According to my homework, GT350/R spring rates (lb/in) are actually same or higher (rear) than some of the aftermarket ones, like the FP kit. Unless I am not understanding the concept here, what would be the benefit gained other than the .78" drop?

GT350R
Front: 240
Rear: 914

GT350
Front: 194
Rear: 914

Using this post:
https://www.mustang6g.com/forums/threads/m-5300-w-fp-spring-rates.91226/

Ford Performance Spring Rate:
.78" drop
Front lb/in: 250-260
Rear lb/in: 565 (avg) - 735 (max)

2. In the same thread the a fellow named Epiphany lists that GT350R front spring (fr32-5310-m ) is 10" vs 11.25" on the GT350. This in fact would suggest that the R's front end is lower than GT350 by 1.25", is that correct? I've always people say that the height is actually the same.
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svassh

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svassh

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Tomster

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Ok, I'll bite..... why do you care?
 

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svassh

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Ok, I'll bite..... why do you care?
Not sure if that's meant for me or OP.

I only care as I want to understand the real difference between the GT350 and R. IE is the performance difference really just the lighter wheels, front splitter, rear spoiler and Cup 2s or is there more? As stated have seen conflicting articles on spring rates so I would think a simple part number lookup would easily validate it.
 

Tomster

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Not sure if that's meant for me or OP.

I only care as I want to understand the real difference between the GT350 and R. IE is the performance difference really just the lighter wheels, front splitter, rear spoiler and Cup 2s or is there more? As stated have seen conflicting articles on spring rates so I would think a simple part number lookup would easily validate it.
Meant for the OP. His garage is listed at "nothing worth sharing", but here he is asking off the wall questions. Eh, whatever.... really, what is the concern when there is no skin in the game.

Oh, and as a side note, the only way you'll know is to buy an R and take it out on the track and compare the two.
 
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hiiammarcin

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Meant for the OP. His garage is listed at "nothing worth sharing", but here he is asking off the wall questions. Eh, whatever.... really, what is the concern when there is no skin in the game.

Oh, and as a side note, the only way you'll know is to buy an R and take it out on the track and compare the two.
I have 2017 350R. Didn't know I needed my profile to be up to date to "have skin in the game". On the other hand, if YOU have nothing to contribute to the thread perhaps you just walked into the room without without any skin in the game to begin. Nice attempt to divert and derail, find somewhere else to troll.
 

Tomster

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I have 2017 350R. Didn't know I needed my profile to be up to date to "have skin in the game". On the other hand, if YOU have nothing to contribute to the thread perhaps you just walked into the room without without any skin in the game to begin. Nice attempt to divert and derail, find somewhere else to troll.
Just sounded like a stupid question. Now especially so.

Have a nice day.
 

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Tomster

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Ok. Again, have yourself a nice day.
 

Niz55

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Keep the car stock. All the springs on the market are made only for looks and nothing more. I have tried them all

I wouldn't touch the R suspension if you paid me. The car is 100% from the factory. You can't make it handle any better.
 
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hiiammarcin

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Keep the car stock. All the springs on the market are made only for looks and nothing more. I have tried them all

I wouldn't touch the R suspension if you paid me. The car is 100% from the factory. You can't make it handle any better.
Thanks buddy. I noticed that. I actually saw you name all over these spring/suspension threads, your info was helpful, so thanks for that.
 
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hiiammarcin

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For anyone else who comes across this, here is a synopsis of multiple threads on this topic:

GT350R
OEM Spring rate (linear)
Spring Rate: F 252 / R 602 (thanks epiphany)

Ford Performance (linear)
Spring rate: F 250 / R 565 (thanks 949racing)
Drop: 20mm

Eibach
Spring Rate: progressive F 201 / R (543-948)
Drop: F .9" / R .7"
https://lmr.com/item/EIB-10350290622/mustang-gt350-eibach-pro-kit-springs-15-18

Steeda
Spring rate: progressive
Drop: 1" all around

Pedders
Spring Rate: F 184 / R 806
Drop: 30mm all around

BMR (linear):
Spring rate: F 250 / R 980
Drop: F .3" / R .5"

20171004_150322-1080x1771-png.png


gt350_fp_spring_rates2-jpg.jpg
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