Holy crap Stan!
I complete doctorate thesis of spring technology!
Hey, all I did was have my spare set of front springs squished and welded
(lower two coils squished
in a big vise and welded together). They are about one coil shorter, which
makes the
car ride about 1.5 inches lower, and due to the nature of spring laws as you
describe below,
they are a lot stiffer. Works great for autocross, but man, you have to try
and drive around
the bumps in the road or your teeth will shatter.
Jim
Chesapeake, Virginia
>From: Stan Chernoff <az589@lafn.org>
>Reply-To: Stan Chernoff <az589@lafn.org>
>To: "datsun parts.com" <datsunpartsdotcom@yahoo.com>, Gordon Glasgow
><gsglasgow@comcast.net>, datsun-roadsters@autox.team.net
>Subject: RE: Spring rate
>Date: Sat, 02 Aug 2003 11:16:38 -0700
>
>It is doubtful that Nissan ever manufactured front springs for the
>roadsters. It is most likely that they were purchased from a supplier.
>The "NEW" springs were made in the USA by a company named Eibach and were
>ordered to be functionally equivalent to the ones from Japan. While the
>springs are different in appearance they may be functionally the same
>within accepted tolerances.
>
>What does "Stiffer" mean with regard to spring design or function? It is
>not a term found in the "Handbook of Mechanical Spring Design" published by
>Associated Spring of Bristol, Connecticut. Rate, free length, solid height
>and deflection are some of the terms found in the book. How do you define
>stiffness and how did you measure it? It may be described in a recent
>pharmacopoeia related to the characteristics of Viagra?
>
>Have you calculated the rates of the "Original" springs and the rates of
>the "New" springs based on a formula that considers mean diameter, wire
>diameter, number of active turns and free length among other variables?
>All spring design is founded on Hooke's law according to the handbook.
>Have you actually measured the rates of the "Original" springs and "New"
>springs? Please provide data if you have it on either or both
>configurations.
>
>
>
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