OK... took some measurements and did some estimations to get a better idea of what each cut spring will be like.
Assumptions:
5500lb vehicle weight, 45/55 distribution = ~1240 lb on each front tire
Vehicle weight reacted @19" from LCA pivot, Spring force @ 9.5" from LCA pivot = 2480 lbf per strut assembly
All forces at 90 degree angles (ok since this is just comparative purposes)
Spring height in strut assembly = 11.75"
With this, I decided to look at how much the strut assembly will compress given the different coil springs. Using the OME991 with 1 coil cut as a baseline I then can estimate how the different OME990 configurations will change the ride height as it relates to phunkydude's XK.
Strut assembly compression = D
OME991 with 1 Coil Cut:
Spring height = 12.76"
K = 710 lbf/in
D = 2.48"
Conclusion = To bolt the suspension back together, the strut needs to compress ~1.5" IIRC. So I think the following estimates are probably close since this would've given phunkydude about 2" wheel down travel from his static ride height.
OME990 un-cut:
Spring height = 14.56"
K = 530 lbf/in
D = 1.87"
Conclusion = an un-cut 990 spring will be worse than the 991 with a cut coil
OME990 with 1/2 Coil Cut:
Spring height = 13.74"
K = 560 lbf/in
D = 2.44"
Conclusion = This should give an equivalent ride height to phunkydude's, not including differences in weight from accessories, but with a much lower spring rate that will help ride quality.
OME990 with 1 Coil Cut:
Spring height = 12.92"
K = 600 lbf/in
D = 2.96"
Conclusion = This should give approximately 1" lower static ride height than phunkydude's (again not including accessory weight difference), and with a spring rate thats in-between the OME options, but closer to the 991s
Since these are just rough estimates and I dont know the difference in weight between my vehicle and phunky's, I'll probably try cutting 1/2 coil off OME990's to get my own baseline and then work from there.
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