Custom spring & 5100 adjustable strut combo (1.5-3.5 lift range)

[07JeepXK]

Why not just install the OME MD springs on the Biltein struts without cutting a coil? See where that gets you and then go from there. Because once you start cutting you can't go back. If it's not what your looking for take it apart and then cut the coil and/or make adjustments to the strut as needed.

I just want to know how I can get about 1/2 inch more lift then I currently have. My OME struts are shot so those will need to be replaced right from the start. And I almost wouldn't mind a hair less spring rate than the OME HD springs.

[Matt]

Yeah Adam thats kind of what im torn with doing. My gut tells me that the uncut spring + 5100s @2" is going to be way too much. But you can always cut more off.

Though as long as my cut OME spring is taller than my stock spring I should get more than 2". If its 1/2" taller and has a higher spring rate I think ill easily be in the 3" lift range.

Either way once ive played with it you'll know what to order

[06JeepXKHEMI]

I guess this all makes a little more sense, but your math situation is way to intense for me hahaha.. I was trying to comprehend how cutting a spring would still yield lift, yes I know a stiffer spring will net more lift, hence the advertised 2" OME HD actually gives you closer to 3". By cutting the spring it increases spring rate which will negate the amount of lift??? Am I getting there Matt??? hahaha I feel like Im in school, but a fun school

[Matt]

Lol you're almost there man...

Cutting a spring increases the spring rate, but decreases spring height. The loss in lift is a result of the loss in spring height which has a much larger effect than the lift from increased spring rate.

So basically all im doing is calculating the final spring height for a given load. Comparing the final equilibrium spring heights is an indication of how much ill lose/gain from my current setup. But somethings not adding up so I think the free heights ive calculated for the cut springs are wrong (ill verify when my new springs get here)

You can pretty much ignore all my numbers. Im really posting them all more for the sake of documentation so I can come back here and read what ive done.

[06JeepXKHEMI]

Trust me Im looking right passed those numbers, math is not my strong suit by any means!!! I think I see where you're going but Id have to agree with Adam, go with uncut first and see where you're at, then start cutting

[Matt]

It would be easier if I still had a 3rd vehicle so im a bit more pressed for time this go around.

I'll measure the spring and if I can take 1/2 coil off and still be at least a half inch longer in length than a stock spring, that should all but ensure 3" lift. If I end up a little short I can always slip a strut spacer in with relative ease

[07JeepXK]

So are you planning on running a MD spring with 1/2 coil cut and the Bilsteins at max lift. Then when you install the Superlift drop the struts down to the lowest setting?

[Matt]

^^ exactly

[paroxysym]

matt this may be off subject pertaining to this- but it involves the 5100s... would the spring rate go up or stay the same when you add an OEM Hemi coil to the 5100s adjusted to the highest setting of 2"? If the spring rate increases, what is it at that setting? thanks for your help dude.

[Matt]

The spring rate does not change.

I wish I knew the spring rate of the stock hemi coils but Jeep wouldn't disclose that info when I contacted them.