Long arm vs short arm 😳 - JeepForum.com
 
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post #1 of 12 Old 06-16-2018, 01:46 PM Thread Starter
Mahan688
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Long arm vs short arm 😳

So here’s the deal this is my first post on here and really want some good advice I have two 97 zj one bone stock I just picked up last night my other is lifted 3.5 to 4 inches 32/12.5r15s short arm and rides like **** and mind you it has Bilstine shocks . my question is everyone says short arm is fine with anything lower than 4 inch lift well iam planing on doin 4 inch lift and 35s on my new one but can’t decided long arm or short arm only goin 4 inch’s is it worth the long arm ?? Ya it’s big money which is fine but will it be that much of a better ride doin la compared to a good short arm kit with just 4 inches thanks in advance and will post pics of my project soon

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post #2 of 12 Old 06-16-2018, 01:51 PM Thread Starter
Mahan688
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post #3 of 12 Old 06-16-2018, 01:52 PM Thread Starter
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post #4 of 12 Old 06-16-2018, 02:28 PM
Bossman302
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Long arms will change the ride because it changes the geometry of the arms (suspension). Instead of short arms being pitched at a heavy angle to achieve the lift. The long arms will be more flat and give you a better ride. It brings the suspension geometry back to normal as close to possible.
Just make sure you install adjustable arms.

Long arms are the way to go but as you stated it is pricy. I look at it as being cost affective!

Is that your other Jeep in the background?
Would like to see pictures when you lift your currant ZJ. Throw in some of the other ZJ as well.


I wish they made a 3.5 long arm lift kit. Its not till 5.5" that they offer it. It's a waste of money to purchase a 3.5 kit and then swap it out later when you don't like how the lift kit is preforming for you. Only way to achieve this I Think is to piece your lift kit together. New to the jeep world looking to lift there ZJ would rather just click on a 3.5 long arm lift kit. I'm in the same boat. I want a 3.5 lift kit for my ZJ. IRO kits look great and have a great rating from the forum members that run it. But they don't offer a 3.5 long arm kit. I don't want to purchase the kit and not use the standard arms because I want LA. It's like throwing money away. I would love to see a 3.5 LA kit for the front and optional for the rear.
Good luck to you and your ZJ...Ö..
ENJOY
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post #5 of 12 Old 06-16-2018, 03:29 PM
kg6mov
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There’s no room to run LA at 3.5”, at least not within the contstraints of a kit.

You can make a 4” or so lift ride very well on short arms, but it’s a lot of tuning. Would help to know what you’re running for arms and track bars at the moment.

Not that setting up an LA kit is any easier in as far as tuning.


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post #6 of 12 Old 06-17-2018, 09:49 PM
Mr. Puddles
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What about adding a control arm drop kit for the short arm setup?


http://www.rocky-road.com/jeep-grand...-arm-drop.html

Follow the build!

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post #7 of 12 Old 06-18-2018, 11:15 AM
Kahlis
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Quote:
Originally Posted by Mr. Puddles View Post
What about adding a control arm drop kit for the short arm setup?


http://www.rocky-road.com/jeep-grand...-arm-drop.html
I too asked this question when I was trying to smooth my ride (Rough Country 4" lift kit). Even with Bilstein shock, just like you, the ride was bad. After asking, only 1 or 2 out of 20 replies were in favor of the control arm drop. Primarily, it lowers that point quite a bit and you'll get hung up on rocks. Now if serious wheeling isn't in your future, the drop kit may work.

I highly endorse Iron Rock Offroad's 3-link long arm conversion. It takes a solid afternoon and you will have to angle-grind the LCA mounts off, but you'll be please with the result. They offer just the 3-link, 4-link (rear) and both at cost. https://www.ironrockoffroad.com/prod...rade-8493.html

Although I'm only running the 3-link up front for now (building a Ford 8.8 rear axle for swap) with shorty LCAs back aft, the ride has improved cosiderably. If you have the coin, go for this kit.

1996 ZJ 4.7 stroker, 4x4 conversion w/NP231, 4.5" RE, IRO 3-link/4-link, HPD30/D44HD, 4.56 gears
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post #8 of 12 Old 06-18-2018, 11:31 AM
kg6mov
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Those CA drop brackets are a good theory, but they don’t translate well into practice, like most of what RRO puts out. Looks good on paper, the angles of the CA’s are better, but the relationship between the CA’s and the driveshaft and track bar are important parts of the suspension. Doing the concept correctly would be raising the mounts on the axle side, not lowering the frame side. That’s a lot harder to make as a bolt on kit though.

As a general rule you don’t want to lower the frame side of a link, you want to raise the axle side.

In comparison to the old radius arm style long arm kits it can make sense to take the downsides of control arm drops because it keeps the 4 link.

With the 3 link that IRO has, the 4 link that ironman is selling, and the other manufacturers catching up, there’s no reason to run control arm drops.


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post #9 of 12 Old 06-19-2018, 04:11 PM Thread Starter
Mahan688
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I see that rough country makes a 4 inch long arm that I might go with But then do Rubicon express coil’s and bilstine shocks
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post #10 of 12 Old 06-19-2018, 04:13 PM Thread Starter
Mahan688
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Ps thanks for the input my end goal is to have 4 inch lift with 35’ I kNow they’ll be a lot of trimming involved also cutting out rockers to do custom rockslides
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post #11 of 12 Old 06-19-2018, 04:16 PM Thread Starter
Mahan688
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My old Jeep that’s picture of the silver one has eBay control arms.. 3 1/2 inch coil springs Bill Steen shocksAnd 2 inch spacers that one was thrown together this when I’m doing the right way got a bone stock three owner Jeep figure that’s a pretty good starting point also switching out the transfer case because it has the Quadra track But the guy threw in the select a track Will be posting pictures as I go like I said new to this forum
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post #12 of 12 Old 06-19-2018, 07:06 PM
kg6mov
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The rough country long arms are radius arm, it’s not a great way to go.

The iro rock link is a lot better option, but it’ll be tight at that height. You won’t have a lot of uptravel with 35’s anyway though.


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