Next time. Include the whole thing.
a car had a 375# tagged spring in the rear, the driver felt that the car was loose on corner entry and the Hoosier tire temperatures supported his feel. After stiffing the spring to a 400# tagged spring the driver did not feel any changes. The tire temperatures still supported his feel. After the supposed spring change, the team then began to change shocks, sway-bars, and pan-hard bar heights. At the end of the day, the springs where rated. After viewing the data sheets we found that the 375# tagged spring was actually a 387# and the 400# tagged spring was a 385#. So the actual change in spring rate was not an increase of 25# as was intended but a decrease of 2#. This is why the driver and the tire temps showed no change.
What it amounts to is. There was a spring that what tagged as a 375#. But was measured 385#. They changed to a 400# spring, but it was measured at 385# later. That why they felt no change.
I'm at the point of
You haven't been around long enough in life to see everything that we have.