Which OME springs should I go with?

Here are 2933 & 2942 on rancho 5000x shocks. Also 10mm ome coil spacers front and rear. 31s.

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Very true, of course some people want to keep it mild, which I totally understand (y)


Long story short, my experiments where an effort to make a 2-3" lift do something it can't or at least do very well.
 
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Yep.

I believe OME tried to design their spring lineup for about the same lift height over a variety of possible applications. Through spring rate and/or unsprung length changes to compensate for heavier rigs. And then all kinds of variations just to give people options.

But they should probably spend some time writing up a brochure or something that explains it all in a straight forward manner.

A lot of it has to do with Australia and their vehicle regulations surrounding height. 2" of suspension is some kind of limit. Australians like to hang a lot of heavy crap on their rigs. OME has multiple ways of getting 2" of lift for different weights of vehicles. That is the intention, from what I understand.
 
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So you have quite a bit of rake there. I would guess that if an aftermarket bumper and a winch were added you would drop another 1/2" in the front with those springs.


Not sure i have much of a rake... tho the 2nd pic looks like i do.

Ill take a pic on level ground and share... to double check.
 
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With the weight of a 4.0 hanging on the front springs I think most any of the options would work out well. The trick (in my experience) is getting the rear springs to move. You sit above that axle and will feel its motion the most. Probably around 75% of your ride quality is from how the rear axle is set up. I have always run with no back seat, other than when I had a girlfriend with kids. That was in a CJ-7 and when it went from mostly empty to a bench, 3 kids, and all the extra stuff needed with 3 kids the whole rear acted totally different.
It is a lot easier to have a softer spring and a firmer shock handle extra weight then it is for a heavier spring, regardless of shock, to flex with little weight. That is why (I think) 0ME offers different spring rates. If you plan to go around with the back empty (like I do) then go with the light spring. Otherwise I would say the medium spring would be the better fit. Achieving an exact 2" of lift for your specific Jeep is very difficult to achieve when every TJ will be built different and weigh different. If you need that exact amount of lift then adding a small spacer is about the only way to nail it. I feel that the ride quality is more important than whether the lift ends up at 1.87 inches or 2.13 inches. Everyone is different making the choice of lift kit a very personal matter. If you are going for a 4" lift then companies can expect the buyer to be doing a lot more extreme offroad driving and that can help them design the springs and shocks more closely to your needs. The 2" lift is used by people that will never go farther than the mall to the other side where people are going just short of Johnson Valley type of offroading.
 
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I am hoping to net around 2” of lift front and rear. Which springs would you recommend for that? It sounds like the 2933 medium duty springs would get close to 2” in the front but what about the rear??
I can’t answer that question. There are too many variables.
 
With the weight of a 4.0 hanging on the front springs I think most any of the options would work out well. The trick (in my experience) is getting the rear springs to move. You sit above that axle and will feel its motion the most. Probably around 75% of your ride quality is from how the rear axle is set up. I have always run with no back seat, other than when I had a girlfriend with kids. That was in a CJ-7 and when it went from mostly empty to a bench, 3 kids, and all the extra stuff needed with 3 kids the whole rear acted totally different.
It is a lot easier to have a softer spring and a firmer shock handle extra weight then it is for a heavier spring, regardless of shock, to flex with little weight. That is why (I think) 0ME offers different spring rates. If you plan to go around with the back empty (like I do) then go with the light spring. Otherwise I would say the medium spring would be the better fit. Achieving an exact 2" of lift for your specific Jeep is very difficult to achieve when every TJ will be built different and weigh different. If you need that exact amount of lift then adding a small spacer is about the only way to nail it. I feel that the ride quality is more important than whether the lift ends up at 1.87 inches or 2.13 inches. Everyone is different making the choice of lift kit a very personal matter. If you are going for a 4" lift then companies can expect the buyer to be doing a lot more extreme offroad driving and that can help them design the springs and shocks more closely to your needs. The 2" lift is used by people that will never go farther than the mall to the other side where people are going just short of Johnson Valley type of offroading.

You're doing the spring rate equates to ride quality crap again. No one will have any trouble flexing any available spring for the TJ that creates the desired ride height as long as the shock and other physical constraints allow the flex to occur.
 
You are absolutely correct. "As long as the shock and other physical constraints allow the flex to occur ". Meaning as long as the spring rate is low enough to flex. An overly stiff spring will not flex as easily as a softer spring. Will it still flex? Definitely. Will it flex as much? Definitely not. Will a spring with too low a rate be ideal? Again, no. That is why OME offers so many different choices. You may have a lot of cargo weight and heavy side armor that would be better served by a firmer spring. Or you may run around with not even a spare tire and be best with a softer spring. There are a lot of variables that go into choosing the BEST solution for each vehicle. A firm shock can restrict the soft spring so it will act like a heavier one, but a hard spring does not move as much regardless of other factors. It is stunningly simple to understand.
 
You are absolutely correct. "As long as the shock and other physical constraints allow the flex to occur ". Meaning as long as the spring rate is low enough to flex. An overly stiff spring will not flex as easily as a softer spring. Will it still flex? Definitely. Will it flex as much? Definitely not. Will a spring with too low a rate be ideal? Again, no. That is why OME offers so many different choices. You may have a lot of cargo weight and heavy side armor that would be better served by a firmer spring. Or you may run around with not even a spare tire and be best with a softer spring. There are a lot of variables that go into choosing the BEST solution for each vehicle. A firm shock can restrict the soft spring so it will act like a heavier one, but a hard spring does not move as much regardless of other factors. It is stunningly simple to understand.
I didn't even finish reading that. Find us one spring available for the TJ that is so stiff that it won't compress. Just like every other time, you won't do it. And you won't do it because you can't.
 
Perhaps you might want to read the whole post before you start puffing up your chest. How you argue with something you haven't bothered to read is very telling. Very telling indeed.
 
Perhaps you might want to read the whole post before you start puffing up your chest. How you argue with something you haven't bothered to read is very telling. Very telling indeed.

Select a spring that creates the desired ride height. Select a shock that controls the ride in an agreeable manner. The rest is all clutter that only creates confusion.
 
I just did the OME 2.5" lift with 2933/2949 springs and a .75" spacer in front. I have an LJ set up to tow so I went heavier shocks in the rear. Rancho 55239/55241 shocks. JKS OGS151/OGS126 adjustable track bars.

I gained 3.25" (2.5"+.75" spacer) in front and 2.75" in the rear.

Here's the list to pick from https://dpgoffroad.com/product/tjlj-wrangler-coil-springs/. I chose heavier variable spring rates for my heavier bumper and eventual winch and because I have an LJ set to up to tow a small trailer. I'm not sure who would use the constant heavy load springs (2934/2996). Maybe someone with a 35" spare and a snow plow on front. :D

OME-2932 Stock/Light Load (0-90lbs) Spring 2.0"
OME-2933 Heavy Load (90-180lbs) Spring 2.5"
OME-2934 Front Constant Heavy Load (200+) 2.5-3"
OME-2941 Rear Light Load/Soft Top Spring 2.5"
OME-2942-1 Rear Heavy Load (200+) 2.0"
OME-2949 Rear Heavy Constant Load (220 to GVW) Spring 2.5"
OME-2996 Jeep Unlimited Rear Coil Springs (Constant 400 lbs) 2.5"

OME-2939 Front Heavy Load 4"
OME-2946 4" Rear Coil Springs

OME-2930-L Front STock/Light Load (0-110 lbs added weight) 1.75"
OME-2930-H Front Heavy Load (110-200 lbs added weight) 1.5"

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Sweet bearded baby jesus thats a lot of options.... sometimes too many is a bad thing. thanks for the post. in the OME planning stages currently.
 
I have a LJ too. I have ARB front and rear bumpers, a winch on the front, and run with my hardtop on most the time. The OME Front 2933 springs only gave me 1 1/2" of lift, I guess because I have a ARB front bumper and winch. I added a 1 1/2" front spacer but the front still sits about 1" lower then the rear. I have OME 2942 springs in the rear with no spacers.

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I'm looking to go OME 3.5 springs w/heavy load OME 3.5 shocks to replace my RE springs and ProComp MX6 but can't seem to find a combo of those or even singular in stock sets. Probably replace my worn RE control arms with something else (not too expensive) while I'm at it as rebuilding the RE seems to be a PITA. Plus I don't have an easy way to tell how worn my springs are without removing them.

Any ideas of places that might have a good selection of OME in stock?
 
Hello, long time listener, first time caller.

Looking to improve ride quality and TJ Sag please.

Already purchased Metalcloak bump stops to install on stock. Thinking that’s not enough?

Been looking at the OME TJ Heavy 2” Suspension Kit OMETJHKS. Not looking to go any higher on lift, with the existing 31” tires and stock suspension.

Which OME Springs do y’all think I should go with, for the purpose built front and rear hitch storage?

No front winch, still figure the coolers, firewood, and fishing poles on the curt front hitch platform weigh more.

Rear tire, and rear etrailer hitch rack with <200lb max storage of recovery/camping gear.

1-2 50lb Kayaks on top rack, and 2-4 passengers

2933 Heavy for the front? Or the 2934 Contant Heavy to combat TJ sag?

2942 Heavy for the rear? Or go for the 2949 Constant Heavy to combat TJ sag?

Should I stick with these shocks? Is there a Heavy option for each?
  • 2 x 60046 Old Man Emu Nitrocharger Sport Front Shocks
  • 2 x 60049 Old Man Emu Nitrocharger Sport Rear Shocks
For 31” tires and 2-2.5” lift, do I need the OME JWGK01 Transfer Case Lowering Kit?

For 31” tires and 2-2.5” lift, do I need the OMESD40 Nitrocharger Steering Stabilizer?

Do y’all recommend the front and rear ARB 10mm coil springs spacer fitting kits, for less squeaking? ARBOMEJGF10 / ARBOMEWTJPR10

How much should I expect a local Jeep shop to charge to install this lift kit?

Thank you TJ Forum!


Esmarelda - 97 TJ Sport 2.5L
Rear sag:
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Front sag:
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OME-2932 Stock/Light Load (0-90lbs) Spring 2.0"
OME-2933 Heavy Load (90-180lbs) Spring 2.5"
OME-2934 Front Constant Heavy Load (200+) 2.5-3"
OME-2941 Rear Light Load/Soft Top Spring 2.5"
OME-2942-1 Rear Heavy Load (200+) 2.0"
OME-2949 Rear Heavy Constant Load (220 to GVW) Spring 2.5"
OME-2996 Jeep Unlimited Rear Coil Springs (Constant 400 lbs) 2.5"

OME-2930-L Front STock/Light Load (0-110 lbs added weight) 1.75"
OME-2930-H Front Heavy Load (110-200 lbs added weight) 1.5"
 
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