There are a wide range of OME rates and lengths. On a stock TJ, this will range from almost no lift to more than 2".
OME spring options
- Thread starter ChadH
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There are a wide range of OME rates and lengths. On a stock TJ, this will range from almost no lift to more than 2".
Which is why I asked the question using the part numbers in the first post and subsequent ones. But it sounds like there is inconsistencies with the amount of lift people are experiencing.
Not inconsistencies. There are multiple moving variables of vehicle sprung weights reacting against different springs meandering around all the personal testimonials that are further muddied by people's ability to measure in some consistent manner.
Once thing I know from having fixated over these things in the past is that it cannot be assumed that a higher spring rate by itself will provide a higher ride height. Similarly, it also cannot be assumed a longer free length by itself will provide a higher ride height.
The good news is that if you know the specs of a linear rate spring and the ride height it creates on your Jeep, you can reverse calculate the sprung weights very closely. Once you have the calculated sprung weights of you Jeep, you can closely estimate the ride heights of any other linear rate spring with a known rate and free length.
People have different results because their Jeeps are built differently. If you really want to figure out exactly what height you will get with different spring combinations you can get your Jeep weighed. Once you know your corner weight you can do the calculations. I believe the calculation is, spring free heigh minus corner load divided by spring rate.
A spring with a 100lbs/in rate and a free length of 20" that is compressed to a length of 15" has 500lbs weighing it down. The sprung weight is 500lbs.
Any two of these variables can be used to find the third variable.
That guy does not know anything. He was on here a while ago and there was a pretty stupid thread with him.
I will defend Dirk to the extent that he knows enough to estimate sprung weights and calculate ride heights. My issue is the selection of some of the pieces in his kits, specifically the JKS body lift and his inability to understand why it is a poor design. It reveals the difference between a salesman vs a designer.
I don't know about part number changes. I bought mine in 2019 with a 2 at the front of the part number. But the tags on the springs were 933x and 942x. So I don't bother with the 2
OME's 29xx convention has been around forever. People have been using the shortened 9xx codes for almost as long.
That .. and his insistence that you can tune the ride quality with springs. Salesman vs Designer is exactly right.
My point is that there has not been a change.
I'm not sure about that. I saw some old springs in a shop last week and the numbers on the tag on the spring itself did not match any number I was able to find in their catalog.
I ran 2933/2942 and got about 2”. Then I added a 10mm spacer, then removed that and went with a 1.5” spacer. I thought long and hard about a 2934 up front. If I’d wanted to stay around 2.5” I would have done that. No way to know exactly what they will do on yours. Everyone weighs differently.
Yes and I will be weighing things, but I was hoping to at least get an idea with what others have experienced.
I got 3 inches of lift with the 2933, but my compressed length measures at 14 inches which is consistent with local guidance that the lift is ONLY "2" inches. My new stock spring compressed lengths was 11 inches before installing the 2933 springs.
Has anyone ever used OME springs in conjunction with an appropriately sized air bag to account for varying weights - like a lighter spring to support a unloaded Jeep, then pump up some bags for when towing a small trailer? Curious if anyone knows a suggested part number off the top of their head.
I use OME 2" lift springs with AIR LIFT 60811 1000 Series balloons. I keep them at the minimum 5 PSI except for when I'm pulling my heavy trailer, then I use about 30 PSI. They keep everything level. My bump stop cups sit just slightly above the balloons most of the time (with an extender), with NO jounce pad (the balloon is your new jounce pad). Be sure to file your bump stop cup rim smooth so it doesn't cut the balloon.
These have worked great for the 3 years I've used them. They're fine offroad too, with full articulation of the rear axle.
These have worked great for the 3 years I've used them. They're fine offroad too, with full articulation of the rear axle.
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