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04-01-2008 #1
Registered User
- Join Date
- Jun 2006
- Location
- Halden, Norway, Europe
- Posts
- 213
Eibach 64-67 A-body spring rate part# 3855.140
Hi,
anyone here know what spring rate these springs have? Partnumber 3855.140 at the eibach site, 5238 at the Edelbrock site. I have these front and rear as a kit with Edelbrock performer IAS shocks. I'm about to do a huge upgrade on my car and need to decided if I'm going to keep this combination or not.
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04-01-2008 #2
Full Blown G-Machiner
- Join Date
- Sep 2004
- Location
- PA.
- Posts
- 935
You`ll hear a lot of different guesses on the rate of Eiback springs. Bottom line is that Eibach won`t say what it is! I`ve tried and tried but they just won`t say. Calculating the rate is a little hit or miss but you can figure the front will be about 535lbs/in and the rear around 135lb/in. Typically they work very well in high performance street cars. Mark SC&C
04-02-2008 #3
Registered User
- Join Date
- Jun 2006
- Location
- Halden, Norway, Europe
- Posts
- 213
Thank you very much! I'm amazed that they won't announce what their spring rates are...
Anyways, I am pretty satisfied with the ride quality and performance of this matched spring/shock set for the street, but I've got a feeling that the spring rate is probably a little low for optimal race track handling. I guess I'll keep these parts for now, although I'd really like to have the adjustability of coil-overs. Money is better spent on the remaining (still stock) suspension, no doubt.
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