Whats for the formula for spring rate?
From: Kurt Bilinski (mail@removed.com) “Here is the formula to calculate spring stiffness: Spring rate = (Gd^4) / (8ND^3) G = torsional modulus for steel = 11.25 x 10^6. d = wire diameter N = Number of _active_ coils. D = Mean coil diameter in inches 8 = Constant The important thing is, since someone [here on HP-list] just want[s] to cut their existing springs, all the above values remain fixed, except for N, so the equation reduces down to: New (shorter) spring rate = original spring rate * (original turns / new turns) So if you decrease the active turns by half, the spring gets twice as stiff, not softer as has been discussed. How about we do a little more engineering and a little less “I think it’s this way”. This stuff has known for years, let’s use it. It’s not like these books are hard to find, just call MotorBooks who’s ad is always in Road and Track.” From: David Mackintosh (mail@removed.coml) “Yes, and it’s really very simple with straight-rate springs (like the one in your ba
