Stock vs Aftermarker Spring rates?

[Lethalchem]

Can I get some help piecing together the various spring rates of the FRPP, Eibach, etc aftermarket options compared to the stock GT500?

Van told me the fronts on the FRPP springs are rated at 260. I've had a surprisingly difficult time finding the various rates on the internet. You'd think they would be well documented, but perhaps I'm not looking in the right place. :shrug:

 

[Van@RevanRacing]

Ford Racing does not publish the spring rates on the L spring and I was given a ball park rate from my contacts at Ford Racing.

 

[tomshep]

Who are they sourced from? Eibach has been used in the past.

Tom

 

[mustangc]

I can't help you with the aftermarket Spring Rates, but here are the factory spring rates:

2013-14 Coupe

Standard

• Fr (N/mm). 35
• Rr (N/mm). 33.5

Performance Pack

• Fr (N/mm). 45.0
• Rr (N/mm). 35.0

2013-14 Vert

Standard

• Fr spr. (N/mm). 32.5
• Rr spr. (N/mm). 30.5

Performance Pack

• Fr spr. (N/mm). 34.0
• Rr spr. (N/mm). 31.5

 

[mustangc]

Same info converted to lbf/in:

2013-14 Coupe

Standard

• Fr (lbf/in). 200
• Rr (lbf/in). 190

Performance Pack

• Fr (lbf/in). 260
• Rr (lbf/in). 200

2013-14 Vert

Standard

• Fr spr. (lbf/in). 185
• Rr spr. (lbf/in). 175

Performance Pack

• Fr spr. (lbf/in). 195
• Rr spr. (lbf/in). 180

 

[Tob]

I don't know how I missed this thread.

When I was looking to use the 5300-L springs from FRPP, I sent a question up the chain asking about rates. I was currently using KR springs/dampers and was contemplating the L springs. Since Ford Racing states that the L springs are "Validated for use with electronically controlled Track Pack option (2013-2014 model year)" I chose them. The information I got back with respect to the rates I was wondering about...

He knew I was inquiring about the L springs, and I assume he meant Ford Racing when he wrote FRT (Ford Racing Technology) and Track Package as TP.

 

[biminiLX]

So, the FRPP L-springs are the same as the PP springs just lower?
-J

 

[Tob]

Apparently.

 

[djmano]

so the performance pack springs are progressive?

 

[JAJ]

No, just longer.

 

[07 Black Beauty]

I don't know how I missed this thread.

When I was looking to use the 5300-L springs from FRPP, I sent a question up the chain asking about rates. I was currently using KR springs/dampers and was contemplating the L springs. Since Ford Racing states that the L springs are "Validated for use with electronically controlled Track Pack option (2013-2014 model year)" I chose them. The information I got back with respect to the rates I was wondering about...

He knew I was inquiring about the L springs, and I assume he meant Ford Racing when he wrote FRT (Ford Racing Technology) and Track Package as TP.

I didn't know the L springs were compatible w/ the Blisteins, good to know since I want to lower my 13 a little but was worried about messing w/ the blisteins. What's the drop w/ the L springs?

 

[BOSSPOWER]

Guys,

I currently have Steeda springs on and all their suspension, but I am in the process of going FULL BMR. They (BMR) are coming out with 3 different set of springs for our cars, drag, performance and road race. I would definitely wait for one of these sets.

Regards,

Manuel

 

[Tob]

I didn't know the L springs were compatible w/ the Blisteins, good to know since I want to lower my 13 a little but was worried about messing w/ the blisteins. What's the drop w/ the L springs?

I have an earlier car and was using KR springs prior to the "L" springs so I'm not sure I can give you what you are looking for.

 

[07 Black Beauty]

I have an earlier car and was using KR springs prior to the "L" springs so I'm not sure I can give you what you are looking for.

Gotcha, I believe American muscle has them listed as .4 in the front and 1 in the rear on the 13's, so I should be able to do just the springs w/ out having to mess w/ Panhard bar and camber plates right?

 

[delvek]

I just had the L spring installed on my 14 GT500, here are some measurements from my thread you might find helpful.

http://www.svtperformance.com/forums/showthread.php?1037931-Ride-Hieght

 

[BMR Tech]

Just wanted to add, our new springs for the GT500 will be:

SP070: Performance Springs
220F / 200R

SP072: Handling Springs
260F / 220R

SP075: Drag Springs
165F / 160R

Should have the first batch of these in a few months.

 

[biminiLX]

Kelly, the real question is when?
Been hearing about them since spring.
Not giving you a hard time, but I'm glad I didn't wait and installed the Ls or I'd still be waiting.
What is a reasonable expectation?
-J

 

[BMR Tech]

They are being built. It takes time. If you want the best parts available, they have to be engineered properly, and they have to be tested thoroughly.

The L's are good springs. Nothing wrong with choosing that path, over unicorn springs. lol

Reasonable is, we should have some initial offerings for real-world testing before Christmas. We have a full freight load of springs built, so it typically takes some time after submitting our order.

When I say real world - we have already done the initial testing. The real-world is getting them on customers cars (limited amount), once available, before listing them to the masses..

 

[T3RMIN8TOR]

Just wanted to add, our new springs for the GT500 will be:

SP070: Performance Springs
220F / 200R
Y
SP072: Handling Springs
260F / 220R

SP075: Drag Springs
165F / 160R

Should have the first batch of these in a few months.

How much drop will the Performance and Handling Springs provide?