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Unread 04-28-2013, 10:06 AM   #16
SLADE
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Quote:
Originally Posted by JTPhoto View Post
What's the weight difference between a 4dr and 2dr stock?
Its looking like the curb weight of 2dr base sport is 3,918lb a 4dr base sport 4,211lb (as listed by
motor trend magazine) So benefit of a doubt we'll give it a difference of 400lb = 100lb per spring divide the weight of front bumper and winch 200lb = 100lb on each front spring, now you already matched weight of the 4dr and you still haven't loaded any gear yet. So you are now effectively back to your original height.
It will be interesting to see how it all works out for you.

I DO NOT want more than 2" of suspension lift and will be happy with 1"-1.5" (from where I started). You keep forgetting that the lift was just an added benifit and I don't think you understand how soft 13/55 coil springs are and how low they made the Jeep sit.

Your wrong, 200lbs does not compress the suspension effectively back to the original height. Infact, 230lbs does not even compress the suspension back to stock height. The 18 front coils handle 230lbs much better than the stock 13 coils did. 200lbs for the winch and bumper is on the heavier side of what I'm planning. The winch I may buy only weighs about 67lbs with synthetic rope and the Warn M8000 I allready have only weighs slightly more with cable on it. By your standards, these coils won't work. but in reality I'm not trying to maintain 2" of lift and I don't plan on my winch and bumper combo weighing 200lbs.


I'm not using base model unlimited 4 door coil springs. I'm using coils that would be most likley found on an Unlimited Rubicon or Sahara with a hard top and Max tow package.

A base model 2013 2 door with a soft top and no tow package uses 13/55 coil springs.

A base model 2012 Unlimited 4 door with a soft top and Max tow uses 16/58 coil springs.

I'm using 18/60 coils on a 2 door base model with a soft top.

These coils are a huge improvement compared to stock plain and simple.

They are also a much better upgrade than using spacers or a BB on top of the stock coils. The 18/60 coils are actually worth building off of and fine tuning with a small spacer if needed.

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Unread 04-28-2013, 10:32 AM   #17
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Not new to this game, we have 3 Jeep JKs i know exactly what those springs are like.
You'll see, Good luck.
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Unread 04-28-2013, 10:46 AM   #18
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Quote:
Originally Posted by JTPhoto View Post
Not new to this game, we have 3 Jeep JKs i know exactly what those springs are like.
Good luck.

And I have 2 JKs.


I think our expectations are different though.

I'm not trying to maintain 2" of lift and pack around a 200lb winch/bumper combo.
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Unread 04-28-2013, 12:17 PM   #19
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I'm allready happy with the results and know what to expect out of the 18/60 coils.

Quote:
Originally Posted by JTPhoto View Post
You'll see.

Do the 18/60 coils have a higher spring rate than the 13/55?

Are the 18/60 coils ment to be on a heavier (than a 2 door soft top) Jeep JK?

Will the 18/60 coils support the weight of a winch, bumper, load, or towing a small trailer better than the 13/55 coils?

Does the 18/60 coils offer a higher ride height than the same amount of weight on the 13/55 combo?

Are the 18/60 take offs significantly cheaper than 4 new "lift" coils.

Does the 18/60 coils offer more than a BB or spacer on top of the stock 13/55 coils?
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Unread 05-16-2013, 12:05 PM   #20
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Quote:
Originally Posted by SLADE View Post
I forgot to measure the front, but there is room in the rear for about a 15.5" shock (compresed length)

At full droop with the shock, swaybar, and brake line brackets unhooked a 25 1/2" shock (extended length) would be needed.
I took some additional measurements today.

The stock rear shocks measure about 14.5" compressed and about 22.5" extended for a total of 8" travel.
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Unread 05-16-2013, 01:31 PM   #21
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This should be a sticky or added to the FAQ sticky....its a great write up and a great option as an entry level budget lift.....well done sir, thank you very much for the attention to detail.
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Unread 05-16-2013, 02:40 PM   #22
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Quick question that wasn't addressed in this swap. I am starting out with 14/56 and I got my hands on some new 18/60 take offs that only had 20 miles on them for next to nothing along with the Rubicon HD red shocks. First, did you have any need to swap out your sway bar end links for longer ones or did the stock ones work well without any issues due to the slight increase in height? Second, did you have any need to get your alignment adjusted after the swap? Appreciate the feed back.
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Unread 05-16-2013, 03:00 PM   #23
SLADE
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Quote:
Originally Posted by BILLETJKAUS View Post
Quick question that wasn't addressed in this swap. I am starting out with 14/56 and I got my hands on some new 18/60 take offs that only had 20 miles on them for next to nothing along with the Rubicon HD red shocks. First, did you have any need to swap out your sway bar end links for longer ones or did the stock ones work well without any issues due to the slight increase in height? Second, did you have any need to get your alignment adjusted after the swap? Appreciate the feed back.

I'm still running the stock swaybar links and I did NOT get it aligned after the coil swap.
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Unread 05-16-2013, 04:42 PM   #24
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Ok, lets put it this way.....the only real difference is the coil sizes....there is a variety of 13-19 on the front and 54-60 on thee rears.....Aside from the Rubicon HD shocks, the JKs all use the same hardware for the suspension......meaning the stock sway bar links are the same, the track bars are the same brake line brackets, etc.
This means you can swap out the coils and get a small budget lift without having to change anything else. My friend owns a shop and we did a coil swap, then did coil spacers, then both, and finally a 2.5" lift and even after the 2.5" lift the alignment adjustments were very minimal.
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Unread 05-18-2013, 05:30 PM   #25
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Front stock shocks measure about 14.5" Compressed and about 22.5" extended for a total of 8" travel.

At full compression, there is room for about a 15.5" collapsed length shock without extending the bump stops.
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Unread 05-24-2013, 08:56 PM   #26
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Installed a set of Bilstein 5100 shocks today. The shocks are for a 2"-3.5" lift (a 1" bump stop will allow you to run Bilstein shocks for a 4"-5" long arm lift).

The front (part # 24-146708) measure 14.98" collapsed and 24.63" extended and have 9.65" of travel. They fit without using extended bump stops and will allow for 2" more suspension travel in the front.

The rear (part # 24-146715) measure 15.39" collapsed and 26.38" extended and have 10.99" of travel. They fit without using extended bump stops and will allow for almost 4" more suspension travel in the rear.

Going to put a few miles on it tomorrow to see how they compare to the stock shocks.
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Unread 06-27-2013, 10:19 PM   #27
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After wheeling over memorial day weekend in the mountains of west TX, I learned a few things. One the stock suspension with 285's do in fact rub the rear fender when touching the bump stops, two the stock 14/56 springs are unable to carry any load with out the aforementioned happening! I decided to change my suspension plans slightly. I ordered an AEV 2" spacer lift, and then installed the 18/60 springs and rubicon shocks I was intending to install. The results were impressive. Original height from ground to bottom lip of fender was 35.25" front, and 35.5 rear, with my xhd front bumper installed. After the upgrade, I am sitting at 38.9" front, and 38.1" rear. The spacer kit is only adds 2" front and a tick over 1" rear. That means these coils added 1.4" front and 1.75" rear for my total lift of 3.4" front and 2.85" rear averaging out to a 3.125" lift. Not bad for $520 invested giving me mono tubes and heavy duty coils! Very happy with the results. When I can afford to regear, I definitely think I will get 35's!
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Unread 06-28-2013, 12:48 PM   #28
jaidmaster
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I went from 14/57 to 18/57 (replaced the front only).
Less sag (lightweight bumper and winch).
Less brake dive.
Exactly 1" lift in the front.
So far so good..
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Unread 07-24-2013, 02:57 PM   #29
SLADE
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Quote:
Originally Posted by JTPhoto View Post
What's the weight difference between a 4dr and 2dr stock?
Its looking like the curb weight of 2dr base sport is 3,918lb a 4dr base sport 4,211lb (as listed by
motor trend magazine) So benefit of a doubt we'll give it a difference of 400lb = 100lb per spring divide the weight of front bumper and winch 200lb = 100lb on each front spring, now you already matched weight of the 4dr and you still haven't loaded any gear yet. So you are now effectively back to your original height.
It will be interesting to see how it all works out for you.

Well, It took much more than 200lb to compress the rear coils back the stock height. Here is some real world measurements to compare to your internet guessing.

I put the coils to the test today. Hauled a load of flat rock and cut stone. I'd guess there is probably about 2,500lb+ of stone on the trailer and a healthy portion of it on the tongue. This will be as much as I plan on towing or hauling with it. The rear compressed about 2.5" ( 1/2" below stock height) with the load on it. The coils handled the load much better than the stock coils would have. So far, I'm still very happy with the results of the 18/60 coils and Bilstein shocks.








Loaded (Rear tire to bottom of flare)


Unloaded (Rear tire to bottom of flare)
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Unread 07-24-2013, 04:38 PM   #30
442Wrangler
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Were the coils physically taller or just much stiffer than the old ones and that is how you got the lift? I'm a little confused.
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