[s-cars] spring constants

[Trevor Frank]

Well I like to see the curve from a spring tester, distance compressed
and spring force.  It is true that often progressives give the beginning
and ending rate, but that is in a simple progressive spring, to find
what is going on with these HR's I suspect that there are multiple
progressive rates, so the data could look like, 1-4" =100-275
4-8"=275-500

The 100, 275 and 500 would be in inch pounds so the actual spring force
at a given distance would have to be calculated.

So somewhere around .5-1g equivalent spring force at full compression,
of the shock/spring combo, it isn't necessarily the spring that will
coil bind before the shock runs out of travel.  So for the front of our
car that would be about 1700-2200lb force.

-----Original Message-----
From: Voits [mailto:voits at comcast.net]
Sent: Friday, March 19, 2004 10:29 AM
To: s-car-list at audifans.com
Subject: RE: [s-cars] spring constants

Trevor, Richard, et. al.:
What is the proper way to measure spring constants, anticipating that
the
spring *might* have a progressive design?
I'm preparing to measure and document the Stock, Eibach, OEM/'92/Euro
Sport
springs in the near future as part of my ($$) "not too soft, not too
firm,
just right" quest.  Right now I'm too firm.
All the best,
Steve V.
95.5 S6
Seattle


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