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Unread 12-01-2009, 07:56 PM   #1
bucklee00
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cj lift with yj springs home made spring hangers 2.5

i am in need of a new lift kit. hopefully 2.5in.

this is a cj with stock yj springs SOA. from rocky-road.com it seems to me the yj springs flex pretty good. now this is with some premium shocks i assume.

this made me think, what if i put stock yj springs, SUA, but to obtain my 2.5 inch lift i make custom spring hangers that would end up with the mounting hole 2.5 inches lower than the stock mounting hole. I would also buy front lift shackles to make the front and rear of the leafspring even.

i am in a welding class every day for about 2.5 hours in school, so i can weld up the spring hangers no problem

if project turns out like i hope it will be an 81 cj5 with 283 chevy, nv3500, and dana 300. money will only allow me to run 31's for now which is why i would like to go budget. then two or three years down the road i can grind off my homemade hangers, get 33's and a 4 inch lift

tell me what you guys think about this, because besides the rather large spring hangers, i cant really see any problems with this scenario

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Unread 12-01-2009, 10:02 PM   #2
Dngrs1
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Well, given the terrain that pic was taken in, why do want your Jeep to flex??
But I do think that fork lift could use at least 4" of lift
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Unread 12-01-2009, 10:25 PM   #3
MisfitSeven
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YJ springs are softer than CJ springs, they ride flat while the CJ springs have a little bit of arch to them. take that into consideration. plus just like shackle lifts, if you only drop four [instead of all eight mounts] you will only gain half of the amount you drop it.

"why do you want your jeep to flex?" ...umm, the more flex the better. as long as the tires are in contact with the ground and have traction, you can keep moving.
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Unread 12-02-2009, 12:10 AM   #4
redbird2289
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what all is needed to do the yj spring conversion? i was under the impression just springs and shackles
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Unread 12-02-2009, 12:58 AM   #5
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Quote:
Originally Posted by redbird2289 View Post
what all is needed to do the yj spring conversion? i was under the impression just springs and shackles
just the YJ springs and either conversion shackles or a wider swing shackle mount on the frame in the front.
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Unread 12-02-2009, 06:24 AM   #6
Area.3.Fiftyone
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If stock YJ springs are flatter, won't you LOSE lift by just swapping them out for your arched CJ springs?

I understand that they are preferred when doing and SOA to keep your height down and flex better, but I don't see how they could lift your CJ by keeping them spring under unless you also lower your fixed mounts and add longer shackles?
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Unread 12-02-2009, 09:08 AM   #7
bucklee00
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iron maiden, that is exactly what i am saying. i know that my old cj springs are worn out and i am wanting to find a good set of yj springs, because they are cheap and i hear they ride good, and then to gain my lift i would lower my fixed mounts and add longer shackles, at all leaf springs. it is basically the same ideah of putting a block between the axle and leaf spring on SOA, but it would be like putting the block between the frame and spring hanger, and then adding longer shackles to complete my lift. or i could even lower the point in which my shackle attaches to the frame
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Unread 12-02-2009, 09:25 AM   #8
kickingprop
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You also need wider spring perches on the axles to accomodate the wider springs.
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Unread 12-02-2009, 11:17 AM   #9
bucklee00
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can you all see any flaw's with my idea on the home made lift?

also on rocky-road it says that the yj springs flex so good because it is SOA and has more leverage than SUA. The only way i can imagine having more leverage on the spring is the width of the axle

Last edited by bucklee00; 12-02-2009 at 05:43 PM..
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Unread 12-02-2009, 01:49 PM   #10
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Drop spring brackets are generally not a good idea. They put way too much stress on the frame.

IMO: You would be better off either getting better springs or doing an SOA with YJ springs.
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Unread 12-02-2009, 07:43 PM   #11
gp4play
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I've seen a 7 lifted with stock YJ springs and a SOA and it works great and rides nice on 33's.You have to change the spring hanger and perch because of the width and SOA, move the shackle mount forward 1 hole because thier longer too.I plan on doing same for my 7 soon,we need lots a flex out here on the rocks
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Unread 12-03-2009, 06:28 AM   #12
Area.3.Fiftyone
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Quote:
Originally Posted by gp4play View Post
I've seen a 7 lifted with stock YJ springs and a SOA and it works great and rides nice on 33's.You have to change the spring hanger and perch because of the width and SOA, move the shackle mount forward 1 hole because thier longer too.I plan on doing same for my 7 soon,we need lots a flex out here on the rocks
He's not talking SOA.

He wants to move the spring hangers down and keep it SUA, which IMO is not a good idea.

BTW: You don't need 7" of lift to run 33's.
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Unread 12-03-2009, 09:05 AM   #13
bucklee00
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what if i brace it up? still bad idea?
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Unread 12-03-2009, 11:26 AM   #14
Area.3.Fiftyone
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It would probably work, but you have to remember how much leverage the axle will exert on the springs and brackets to the frame.

The lower you drop the brackets, the more chance you have of them tweaking your frame eventually.

Like I said before: I personally would not do it. You are better off using YJ springs and going SOA or buying new springs with more arc and keeping it SUA.
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Unread 12-03-2009, 08:01 PM   #15
bucklee00
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alright, thanks for the advice
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