Rough ride

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Ocho

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No they don't manufacture two different spring rates that give the exact same ride heights on the same Jeep on the mass market, except for that one highly specific one in a specific someone's garage where they did create two sets of springs with two different rates and lengths where the Jeep weight results in the same ride height between the two sets of springs.

oh shit i can't afford to get my springs custom tuned.. what can OME offer me instead?
 

Ocho

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Analysis paralysis 🤣

lmaooooo

there's nothing to analyze really.. simple answer is that OME can't give me a spring with a different rate that will give me the exact same ride height as another OME spring so even if i wanted to test two different OME springs as mr. OME condescendingly blabbed about with a "well did YOU try all of those springs" really doesn't mean jack shit since there's no constant.

springs set ride height.
 
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Huckster

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jjvw, I took your advice and measured the rear springs ( 7” on both sides) . I also measured the distance from the bottom of the bump stop to the spring perch where it would strike. About 2” which seems a little short to me but I am less than an amateur when it comes to these things. I have read a bunch of posts that have come up on this. It appears I may need a slightly l
onger spring; maybe 9” to give the mediocre rancho shocks a chance to work efficiently.
After reading a lot of posts, to my thinking, the springs set the ride height and will oscillate at a certain frequency dependent upon the poundage the spring is designed to be (140#, 160# or whatever maybe stock springs) and also how much weight is sprung weight. Then you have the shock which dampens the oscillations and needs to be the right height and made for the application…the Jeep TJ. I welcome everyones input.

651E6F70-FDCA-4594-AC56-21CD7FED1F1C.jpeg


A8430F6A-0C86-4E7B-A96B-921BEB7BB6C3.jpeg


6D66F945-DCCC-432E-81B6-E57957260B9B.jpeg
 

Huckster

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There does not exist on the face of this planet any springs made for a TJ and its derivatives that you can NOT blow right through. It is that simple.

I had 5 paragraphs written to help with understanding, fuck it, makes no difference anyway.

mrblaine, I am trying to understand. I am 63 years old. I am not a rocket scientist. I do try to learn from those who might know a little bit more about some things than I do. There probably are not any shocks made someone can’t blow through, but I’m just attempting to get my little backend of my TJ working the best it can….myself, without taking it to someone else. I actually usually enjoy your curmudgeonly advice…not shocks …springs
 

JMT

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jjvw, I took your advice and measured the rear springs ( 7” on both sides) . I also measured the distance from the bottom of the bump stop to the spring perch where it would strike. About 2” which seems a little short to me but I am less than an amateur when it comes to these things. I have read a bunch of posts that have come up on this. It appears I may need a slightly l
onger spring; maybe 9” to give the mediocre rancho shocks a chance to work efficiently.
After reading a lot of posts, to my thinking, the springs set the ride height and will oscillate at a certain frequency dependent upon the poundage the spring is designed to be (140#, 160# or whatever maybe stock springs) and also how much weight is sprung weight. Then you have the shock which dampens the oscillations and needs to be the right height and made for the application…the Jeep TJ. I welcome everyones input.

View attachment 369846

View attachment 369847

View attachment 369848

Is that the measurement of your Rancho shock from eye to eye at ride height? What you need to know is the extended length of that shock. That information is available in the TJ Resources part of the forum and it is a Sticky, so it is easy to find at the top of that page. Find your shock and the extended length. Then you need to know the shock travel of that shock. Then you need to measure how much of the shaft of your shock is showing at ride height (might have to cut taht red boot off, no worries, it does nothing important). Ideally you want that measurement to be half of the travel of that shock so that your travel bias is 50:50.
 

jjvw

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lmaooooo

there's nothing to analyze really.. simple answer is that OME can't give me a spring with a different rate that will give me the exact same ride height as another OME spring so even if i wanted to test two different OME springs as mr. OME condescendingly blabbed about with a "well did YOU try all of those springs" really doesn't mean jack shit since there's no constant.

springs set ride height.

The variances in ride heights can be adjusted with spacers.
 

Huckster

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Is that the measurement of your Rancho shock from eye to eye at ride height? What you need to know is the extended length of that shock. That information is available in the TJ Resources part of the forum and it is a Sticky, so it is easy to find at the top of that page. Find your shock and the extended length. Then you need to know the shock travel of that shock. Then you need to measure how much of the shaft of your shock is showing at ride height (might have to cut taht red boot off, no worries, it does nothing important). Ideally you want that measurement to be half of the travel of that shock so that your travel bias is 50:50.

Yes, that was the measurements of my rancho shocks on the rear at ride height.
 

Blackjack

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jjvw, I took your advice and measured the rear springs ( 7” on both sides) . I also measured the distance from the bottom of the bump stop to the spring perch where it would strike. About 2” which seems a little short to me but I am less than an amateur when it comes to these things. I have read a bunch of posts that have come up on this. It appears I may need a slightly l
onger spring; maybe 9” to give the mediocre rancho shocks a chance to work efficiently.
After reading a lot of posts, to my thinking, the springs set the ride height and will oscillate at a certain frequency dependent upon the poundage the spring is designed to be (140#, 160# or whatever maybe stock springs) and also how much weight is sprung weight. Then you have the shock which dampens the oscillations and needs to be the right height and made for the application…the Jeep TJ. I welcome everyones input.

View attachment 369846

View attachment 369847

View attachment 369848

You actually want to measure to the bump stop cup when determining shock length. Typical stock bump stop gives you about 2 inches of squish before it you hit the cup to the coil pad. So you have closer to four inches of up travel.
 

TurboTJ

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pardon my ignorance to OME springs but let's say i want 2.5" of suspension lift.. how many coils does OME offer for me to get that ride height, not changing anything other than the coils to achieve 2.5"?

The OME 2942 rear springs are 10mm shorter and have a 20 lbs per inch greater rate than the 2941 springs. I am not sure if those two factors typically yield the same ride height but they do tend to compensate for each other.
 

jjvw

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The OME 2942 rear springs are 10mm shorter and have a 20 lbs per inch greater rate than the 2941 springs. I am not sure if those two factors typically yield the same ride height but they do tend to compensate for each other.

They don't create the same ride height, except under one specific sprung weight.
 

JMT

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They don't create the same ride height, except under one specific sprung weight.

Right, on one rig with no other changes and the same amount of gas in the tank for the back two corners. LOL. I wish I was optimistic about this thread.
 

Huckster

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So I looked up Rancho rear shocks for my Jeep: RS 55241…extended length 21.67”. I Cut the red plastic boot off and measured. 2 3/4” exposed rod on the driverside shock and 2 7/8” on the passenger side. To acheive a 50/50 ratio there should be about ( 8.16 travel lengthdivided by 2= 4.08 minus 2.75= 1.33”… so I need about another 1.33 inches of shock rod exposed to achieve the 50/50 ratio of uptravel to downtravel….probably why the rear is bottoming out

D5395814-1493-4EFA-8CA9-FCB86558C6D3.jpeg


A0D1ED60-0653-4F5B-9F7E-4F1E09EF80F9.jpeg
 
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jjvw

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So I looked up Rancho rear shocks for my Jeep: RS 55241…extended length 21.67”. I Cut the red plastic boot off and measured. 2 3/4” exposed rod on the driverside shock and 2 7/8” on the passenger side. To acheive a 50/50 ratio there should be about ( 8.16 travel lengthdivided by 2= 4.08 minus 2.75= 1.33”… so I need about another 1.33 inches of shock rod exposed to achieve the 50/50 ratio of uptravel to downtravel….probably why the rear is bottoming out

View attachment 369936

View attachment 369937

There is one way you can fix this with springs. 🤫
 
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