Taken from Suspen Info > Dyno Test Info > Fk.

comp force drop - 1st run to 2nd etc       3ips = about .5-1.0 lbs thru range      10ips =      70 ips =

reb force drop - 1st run to 2nd      3ips =         10ips = 1-3 lbs at 10+70ips            70 ips =