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Old 07-03-2012, 01:44 PM   #1
Higgs Boson
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Spring Rates

I only did a quick search and found nothing so this thread is to list the spring rates for stock and aftermarket lowering springs. No coilovers since the rates are not the same (unless you want to include them, just know it's not apples to apples with a regular spring).

V8

Stock Fronts
Stock Rears

Pfadt Fronts 225
Pfadt Rears 425

BMR Front (1") 220
BMR Rear (1") 460

BMR Front (1.4)
BMR Rear (1.4)

Pedder Front
Pedder Rear


Convertible Specific

Hotchkis Front (1") 210
Hotchkis Rears (1") 440

Coilovers

KW Coilovers
FRONT 285
REAR Progressive

ST Coilovers
FRONT 285
REAR Progressive

etc.... of course I don't have any of the info, which is why I started this thread. If you are a vendor/manufacturer and have the info for your springs, please post up so I can create an informative condensed post.

Thanks.

Last edited by Higgs Boson; 07-13-2012 at 02:14 PM.
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Old 07-03-2012, 01:59 PM   #2
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BMR 1"
220
460
Here's a thread I started about the BMR springs.http://www.camaro5.com/forums/showth...R+spring+rates
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Old 07-03-2012, 02:16 PM   #3
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Pfadt Camaro lowering springs (fits both SS and V6 models)

Front: 225
Rear: 425


BEFORE Pfadt lowering springs:



AFTER Pfadt lowering springs:

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Old 07-03-2012, 02:36 PM   #4
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Thanks Chase! You beat me to it!
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Old 07-03-2012, 02:36 PM   #5
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Great thanks, let's keep it going, any springs, all springs, listed in the first post or not, if you have the specs, post them up!
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Old 07-03-2012, 02:54 PM   #6
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Thanks Chase! You beat me to it!


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Old 07-03-2012, 02:56 PM   #7
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Old 07-03-2012, 02:59 PM   #8
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Hochkis 1" drop for convertibles. Front 210lbs/in, Rear 440 lbs/in
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Old 07-05-2012, 11:09 AM   #9
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Let's keep it going, Eibachs, etc, there's a lot more out there than this!
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Old 07-13-2012, 01:39 PM   #10
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KW Coilovers are FRONT 285 REAR Progressive
ST Coilovers are FRONT 285 REAR Progressive

I have a phone call into ST for the rates on their lowering springs.
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Old 11-17-2012, 12:12 PM   #11
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Quote:
Originally Posted by Higgs Boson View Post
I only did a quick search and found nothing so this thread is to list the spring rates for stock and aftermarket lowering springs. No coilovers since the rates are not the same (unless you want to include them, just know it's not apples to apples with a regular spring).

V8

Stock Fronts
Stock Rears

Pfadt Fronts 225
Pfadt Rears 425

BMR Front (1") 220
BMR Rear (1") 460

BMR Front (1.4)
BMR Rear (1.4)

Pedder Front
Pedder Rear


Convertible Specific

Hotchkis Front (1") 210
Hotchkis Rears (1") 440

Coilovers

KW Coilovers
FRONT 285
REAR Progressive

ST Coilovers
FRONT 285
REAR Progressive

etc.... of course I don't have any of the info, which is why I started this thread. If you are a vendor/manufacturer and have the info for your springs, please post up so I can create an informative condensed post.

Thanks.
ST coilovers 285lb front. Are you sure. Those are a very soft application and that spring rate seems a bit too high.
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Old 11-18-2012, 02:24 PM   #12
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Pfadt lowering springs are now 210 front and 395 rear.
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Old 11-18-2012, 05:06 PM   #13
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Quote:
Originally Posted by TheSuspensionSource View Post
KW Coilovers are FRONT 285 REAR Progressive
ST Coilovers are FRONT 285 REAR Progressive

I have a phone call into ST for the rates on their lowering springs.

Do know what the spring rates are in Kg/mm?

The Pedders XAs are 8 kg/mm (front) and 10 kg/mm (rear).
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Old 11-18-2012, 10:30 PM   #14
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Quote:
Originally Posted by Higgs Boson View Post
Let's keep it going, Eibachs, etc, there's a lot more out there than this!
That's funny-I recently tried to make a spreadsheet to compare lowering springs:

https://docs.google.com/spreadsheet/...2JXQjZjNjEzRHc

Stock V8: 165 lbs/in front, 370 lbs/in rear
BMR (V6): 200 lbs/in front, 430 lbs/in rear
Eibach Pro-Kit (V8): 143-222 lbs/in front, 291-485 lbs/in rear

I didn't add any convertible fitments.
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