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Unread 07-05-2012, 03:50 PM   #1
stevsand77
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zj Long arm lift

So I'm looking into getting a 4.5" long arm suspension lift for my zj. The ride with the rough country 3.5" is pretty stiff and I'm looking to get some more flex. Ive looked into some different kits and they all have said to cut the stock control arm brackets off. I was wondering if the stock control arm brackets have to be cut when you install the kit or not. will they get in the way if that aren't cut? and also are there any suggestions on what brand i should get?

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Unread 07-05-2012, 04:31 PM   #2
JasonStebbins
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Rough Country is junk.

You will have to modify the control arm brackets for long arms.

Iron Rock Off-Road has nothing but good reviews on this forum.

http://www.ironrockoffroad.com/Merch...egory_Code=ZLK
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Unread 07-05-2012, 04:58 PM   #3
Area.3.Fiftyone
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They don't call it Rough Country for nothing.

Get some RE or OME springs and enjoy the lift that you have. You don't need long arms to get a good ride or decent flex.....

With that said, I'm at 7+ inches of lift on IRO long arms and love the ride. It's a lot of work and expensive, but that's the price you pay to run 35's.

You don't HAVE to cut the stock brackets off, but I did.
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Unread 07-05-2012, 06:20 PM   #4
WhiteOut
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With the IRO you do, I didnt for a while since Im laze and scratched up the arms on the brackets.
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Unread 07-05-2012, 06:48 PM   #5
Technohead
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Clayton Offroad or go home!!!
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Unread 07-05-2012, 07:29 PM   #6
Area.3.Fiftyone
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Quote:
Originally Posted by Technohead View Post
Clayton Offroad is way over priced. I would spend your money wisely and get the IRO stuff.
Fixed it for you......

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Unread 07-05-2012, 07:44 PM   #7
Technohead
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You get what you pay for. Didn't your mama ever teach you that . . .
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Unread 07-05-2012, 08:26 PM   #8
BigDaveZJ
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Originally Posted by IronMaiden View Post
Fixed it for you......

Apples and oranges. And even then the prices aren't THAT much different. But IRO is an excellent contender for the more budget conscious.
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Unread 07-05-2012, 08:55 PM   #9
Technohead
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Quote:
Originally Posted by IronMaiden View Post
Fixed it for you......

Lets lay some facts on the table and see what the wise spend really is.

IRO Premium 7" Long Arm Kit: $2,499.99
Clayton Offroad 7" Long Arm Kit: $2,999.00

Now lets compare.

Upper control arms:
IRO: Fixed (no option for adjustable)
Clayton: Fully adjustable with Currie Johnny joints

Lower controls arms:
IRO: Bent tube (DOM or cold roll) which provides some extra clearance but significantly compromises strength. Rears are adjustable. Adjustable front costs $100 extra
Clayton: 2" x 1/4" thick square tubing. Bulletproof Clevite bushing at the axle and Johnny joints at the frame. Fully adjustable.

Shocks
IRO: D*ouche Tech by default. You are better of running without shocks then running these pieces of crap. Bilsteins are a $250 option.
Clayton: None. Clayton knows that most guys who buy his kit are building a hard core trail rig and will be spec'ing out their own shocks; most likely after replacing the weak factory shock mounts for additional clearance.

Miscellaneous
IRO: No frame stiffener and no truss
Clayton: Frame stiffeners and rear axle truss

Warranty
IRO: Free of defects in materials and workmanship . . . blah, blah, blah, . . . two paragraphs of fine print.
Clayton: Lifetime warranty. You break it, he replaces it. Period.

So there you go. The facts. The better value is a no-brainer.
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Unread 07-05-2012, 11:18 PM   #10
ratmonkey
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Iro still retains a five link rear as well.
Iro is advertised as bolt on, but loosens up for many people and has to be welded.

Round 2"x.25 wall Dom is, in fact, stronger than 2x2x.25" though.
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Unread 07-06-2012, 04:03 AM   #11
Technohead
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Quote:
Originally Posted by ratmonkey View Post
Round 2"x.25 wall Dom is, in fact, stronger than 2x2x.25" though.
Its not even close. The square is much stronger.

The bending stiffness is the product of elastic modulus and area moment of inertia (EI).

EI for 2" x 1/4" wall round steel tube = 1.6E7 lb-in^2
EI for 2" x 1/4" wall square steel tube = 8.6E7 lb-in^2

This means that for a given load (up to the yield point of the material) the round tube will bend about 5.4x more. Of course the A500 square has a lower yield point than the DOM (40ksi vs 70ksi) but even then the square tube is still effectively 3x stronger.

(Feel free to double check my math. I ran the numbers twice and got the same result)
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Unread 07-06-2012, 05:01 AM   #12
ratmonkey
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the math i've seen has 2" vs 2" much closer(i haven't done the calcs in the better part of 10 years now) i'd actually have to find my strength of materials books!
i think with the standard round lower link of 2.5" we see a pretty decent increase in capacity.(which is the proper comparison as 2x2 and 2.5 are the common lower link tube sizes)
sizes that bring about equal weight per foot gives the advantage to the round tube in the same ratio as square has over same diameter round tube.
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Unread 07-06-2012, 05:55 AM   #13
Area.3.Fiftyone
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Wow....
clayton-vs.-iro.jpg  
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Unread 07-06-2012, 09:50 AM   #14
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Quote:
Originally Posted by IronMaiden View Post
Wow....


I know I'm going to get some flak for bring up this name.
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Unread 07-06-2012, 11:21 AM   #15
PolkaPower
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I have seen a Clayton's long arm set up and it's really beefy and overbuilt looking. The ride was great as well.
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