math class needed on valve springs

[Eman]

Originally Posted by gmonde

what is the math formula for a known spring rate to calculate seat and open pressure ?

spring rate is 370lbs @ 1.00"

closed valve spring installed heigh1.780
open valve spring height 2.237

seat pressure ?
open pressure ?

thanks in advance

Is the spring rate 370lbs per inch? Is the installed height 1.780? Open height can't be more than closed, what is the free height of the spring?