well the way spring force is measured is by F=kx, its called hooke's law in physics. Force is equal to K which is the spring constant or the springs stiffness multiplied by its displacement. Now these springs were all different constants meaning the valves were all closing at different speeds causing a loss in power and compression. Meaning somehow every single spring went bad after 3k miles. My question is are there any better springs i can use for my car since the JWT obviously are not working.