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post #1 of 13 Old 05-20-2015, 04:43 PM Thread Starter
Bones741
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Spring swap question

Hey guys im back on the forum for the first time in a few years. ( haven't updated my profile yet). but anways just traded in my 09 sport jk for a 2015 Freedom edition JK . ANYWAYS.... i was planning on doing a jku spring and rubi shock swap, ( already have 19/58's and the shocks sitting in my room). my 09 had 13/55's and a soft top ( thats why i went with 58's). now my new jeep has a hard top and 14/56. all im wondering is do you think the jeep will sit level or have a slight rake ( dont mind either) or look like a dog squatting down to take a steamer..... which i dont want. Also as far as wheels spacers go on stock JK wheels, do the bring the tire even with the fender or would they stick out some?


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post #2 of 13 Old 05-20-2015, 05:01 PM
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I threw some "Unlimited" springs on mine along with 3/4" pucks all the way around. The Jeep came with 14/56 combo and I went up to 17/58's. I gained 2" up front and 1.5" in the back all tolled (pucks and new springs). So the springs accounted for 1.25" up front and .75" in the rear. Removed what rake I had and it sits pretty level now.


Before:






After:




Maybe a better "after" pic:


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post #3 of 13 Old 05-20-2015, 06:18 PM
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I would expect about 1.25" in the front and .5" in the rear. Usually the average seems to be a .25" per spring number. But of course there are many variables. So put the fronts on to remove the rake and see if the rear .5" will be good. If not, I'd pull the fronts back out. Just my .02.


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post #4 of 13 Old 05-20-2015, 06:36 PM Thread Starter
Bones741
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hmmm. maybe id be better off finding a set of 59 or 60's than. figuring on doing this in a month or so considering i havent even made the first payment yet .

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post #5 of 13 Old 05-20-2015, 09:06 PM
SLADE
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You should see about 1.5" in the front and about 1.25" in the rear.

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post #6 of 13 Old 05-25-2015, 07:46 AM Thread Starter
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alright thanks for the input guys

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post #7 of 13 Old 05-25-2015, 08:30 AM
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Originally Posted by Bones741 View Post
alright thanks for the input guys
If you do it post your results. I would be very surprised to see 1.25" from 56s to 58s in the rear.


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post #8 of 13 Old 05-25-2015, 10:57 AM
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If you do it post your results. I would be very surprised to see 1.25" from 56s to 58s in the rear.


He won't. I was looking at the him having a 55 rear coil (previous jeep). 3/4" would be a more accurate guesstimate. The coils increase in free length 1/4" per part number and the rear seem to increase more in rate than the front.

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post #9 of 13 Old 05-25-2015, 11:23 AM
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Quote:
Originally Posted by SLADE View Post
He won't. I was looking at the him having a 55 rear coil (previous jeep). 3/4" would be a more accurate guesstimate. The coils increase in free length 1/4" per part number and the rear seem to increase more in rate than the front.
Yeah that is more consistent with everything I've read...one-quarter to three-eights per number. It is a cheap way of adding a little height if you're starting low (short/weak springs) but usually doesn't solve the rake. If like the OP I already had the parts, I would throw them on a stocker.


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post #10 of 13 Old 05-25-2015, 12:01 PM
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Going from 13/55s to 18/60s, I received 1.5" front and 2" rear which "averaged" .3" per part number in the front and .4" per part number in the rear.

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post #11 of 13 Old 05-25-2015, 12:23 PM
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Originally Posted by SLADE View Post
Going from 13/55s to 18/60s, I received 1.5" front and 2" rear which "averaged" .3" per part number in the front and .4" per part number in the rear.
That's pretty good. On the 2 door or 4?


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post #12 of 13 Old 05-25-2015, 12:47 PM
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2 door, you won't find a 4 door with a 13/55 combo from the factory.


Ive swapped coils around on a 4 door also though.

4 doors will see closer to 1/4"-3/8" and 2 doors are closer to 1/3". It all depends on the base weight though.

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post #13 of 13 Old 05-25-2015, 12:51 PM
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Quote:
Originally Posted by SLADE View Post
2 door, you won't find a 4 door with a 13/55 combo from the factory.


Ive swapped coils around on a 4 door also though.

4 doors will see closer to 1/4"-3/8" and 2 doors are closer to 1/3". It all depends on the base weight though.
I thought it must have been a 2 door. Pretty good numbers. And yes, it all depends on weight and what you are starting with.

Thanks for the info, slade.


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