List of jeep coils and spring rates

[1RangerNut]

Found this while searching, thought it would be helpfull.

http://www.jeepforum.com/forum/f11/springs-heights-their-spring-rates-613756-print/

 

[1RangerNut]

Just got off the phone with Skyjacker and got some spring rate's incase some people don't already know them.

JC30F 3" xj= 218ppi
JC60F 6" xj= 230ppi
SKY134 4" TTB= 480ppi
SKY136 6" TTB= 435ppi
SKY172 2" EB=330 then 400ppi (progressive)
SKY174 4" EB= 516ppi

 

[4x4junkie]

Great info.
Seems I recall this being posted here before, though it looks like there's been some updates since then.

It's interesting how the numbers vary so widely (someone mentioned the taller coils were stiffer for less body roll, but RE (Rubicon Express I assume) and Rock Krawler's numbers appear to debunk that theory Makes me wonder if some TJ numbers might be getting caught up in there.

I'll add from my own experience the JC60F 6" Skyjacker coils have a 22" free length, and the Rancho 3" coils are 18". The SJ coils 'feel' like they are a slight bit stiffer than the Rancho, even though the Rancho has a higher number.



I don't s'pose you've come across anything similar for early Bronco coils? I know there's probably a number of them with rates in the low-300s such as these from JBG, but something about 2" longer than those would be useful also.

(516PPI is just asinine on an EB. That should be more like TIB F-250 stuff )

 

[1RangerNut]

I haven't really looked up EB stuff yet, while I was on the phone I kind of just started asking about the ones in the parts section.

I'm trying to get good flex and only 3-4" of lift.

Right now I have rough country coils that are way stiff, I do have SJ coils off my old ranger that I played around with but they lifted it another 2" and I dont really wanna raise the buckets.

I was just gonna get SJ 4" ones until I found out they were 480ppi.

 

[4.0B2]

Sweet info. Might have to get info on EB stuff so you van update your first post with more specs.