Bill Hogarty, a spring rate is pretty much determined by the spring free
length, coil diameter, the wire diameter and the number of coils. The
modulus for most springs of this type is constant.  Get this info from
Lancair and look in McMaster Carr or a Lee Spring catalog. They will
give you the rate info.  The spring engineer just did not want to mess
with you.  Now if you wanted 5000 springs per day for the next year...he
would have helped you out.

Maybe your installed spring height is too short..?? The min operating
height should also be in the catalogs.  I don't remember putting this
spring in due to all of the other efforts.\
Craig Berland