i just did a rough calculation on hipo wedge and street hemi spring rates. the wedge came out 270lb rate and the hemi about 350lb rate. actual numbers would need to be calculated using actual real world springs but hopefully you folks get the idea.

i just dug up some spring info i done some time back. hipo wedge spring i checked was 100lbs@1.900", 238lbs@1.400". street hemi 95lbs@1.900", 300@1.400". noticeable difference in rate. both springs coil bind rather quickly with the dampner being the primary offender.