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Old Apr 19, 2002 | 06:14 AM
  #1  
jagsy's Avatar
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From: Newcastle upon Tyne, England
Default Spring rating

Please help.

What are the spring ratings on a stock '99 Z28 front and rear?

What are the spring ratings of the Eibach Pro Kit (for the LS1)? Are they progressive?

Note I am trying to find out the spring rating for the LS1 Eibachs, not the LT1's.
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Old Apr 30, 2002 | 12:14 AM
  #2  
SSG-Z28's Avatar
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From: Kaiserslautern, GE
Default Re: Spring rating

Hey man, get the Pro-kit.. They are progressive, and really help w/ handling... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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Old May 9, 2002 | 06:36 AM
  #3  
jagsy's Avatar
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From: Newcastle upon Tyne, England
Default Re: Spring rating

Finally, I have the spring ratings for Eibach Pro Kits for the '98+ F-body's with the LS1 engine.

The Eibach part number is 3870.140 and the rates are:
FRONT - 70N/mm (400 lb/in) LINEAR; and
REAR - 14 - 24 N/mm (80 - 137 lb/in) PROGRESSIVE.

This information was confirmed by Eibach.

Note the spring raings are different for pre '98 cars, ie LT1 cars.

Thanks
Jagsy
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Old May 9, 2002 | 09:39 AM
  #4  
Killer '01 SS's Avatar
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From: Brownsburg, Indiana
Default Re: Spring rating

Interesting...

For frame of reference, the stock 98-01 Z28 springs are 290 lb/in. front (LINEAR) and 115 lb/in. rear (LINEAR).

The SLP Eibachs are 223-448 lb/in. front (PROGRESSIVE) and 97-136 lb/in. rear (PROGRESSIVE).

Just an FYI (and to help with future searches on this topic).
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Old May 14, 2002 | 07:00 PM
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From: Milford, NH
Default Re: Spring rating

I just got my Level 1 kit from SLP and the front springs are marked 300/400. Is that their rating? <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
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