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post #1 of (permalink) Old 08-19-2003, 09:34 AM Thread Starter
 
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YJ SPrings SPUA Questions??

Well, I knew this would come. Anyway, as of now I am on 31's, running 1.5" lifted rancho springs with 4.25" drop links shackles(rockrat customs) still spring under.

I want to stay spring under but get more lift, and a body lift is out of the question. I was looking a RRO JPeater kit, and it looks solid, and all the goodies are there, and for $400 it doenst seem very expensive.

It also looks as though it would be just the thing, but with YJsprings alone, I dont think it will give me enough lift, so should I try to find lifted YJ's?

Any suggestions would be greatly appreciated. I need more lift, but I want to stay SPUA.

Kamazuki [img]images/graemlins/grin.gif[/img]
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post #2 of (permalink) Old 08-19-2003, 10:39 AM
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Re: YJ SPrings SPUA Questions??

Hey Kama..you're talking my language, here.

My rig is in a state of flux, but I have been dealing with this issue recently. When I put on stock YJs SPUA with Trail Tough mounting goodies all around and missing links, I stayed the same or possibly even lost a fraction of an inch over my 2" Calmini Shackle Reverse setup. The s/r setup gave me an honest 2" in the front, but I had to stick an add-a-leaf in the rear to help level it out. My rear ended up about 1/2-3/4" higher than the front, I think.

On my current project I am staying SPUA with the YJs for ride purposes (never go stock sami springs again!!) but I want a little more lift to clear 31s, also. What I am going to do is stick the add-a-leafs from the sami springs in the YJs. Before anyone chimes in to remind me that YJs are 2.5" and the Sami springs are only 2", I know that already. I don't see a problem using them with the YJs...They are only 1/2" narrower..heck...the lateral slop in the spring packs is more than that! I have four of them. When I put them in the YJ pack I expect to get at least 1.5" more of lift alll around, possibly more since the softtop is a lot lighter tthan the hardtop. I am shooting for a total height of 4" or so. That way I can still avoid some of the BS associated with steering correction and all the other SPOA-related, height-induced crap. I'd be visiting Roadless for a BDS drop pitman except I am planning to go with power steering ASAP and that would make the pitman obsolete. I'm also not going to the power steering until I ascertain the reality of the 1.6 swap, since I guess the needed gear if different (and cheaper) when swapping to power steering in a sami with a 1.6

You can get 2 sets of add-a-leafs from JC Whitney for about 80-90$, shipped. These are the ones I got:

add-a-leafs

If they destroy the springs at some point down the road I will probably just go for some 2" lifted YJs, but that's a heck of a lot pricier than 90$ to acheive the same effect. Before I start investing hundreds of dollars more into my suspension I'll look at putting in a 4 link coil setup, anyways.

If you have any specificc questions about the YJ lift, fire away! I have gotten vast amounts of info and advice from this board and am more than happy to give some back.

~daxe
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post #3 of (permalink) Old 08-19-2003, 11:05 AM Thread Starter
 
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Re: YJ SPrings SPUA Questions??

FOr some odd reason, I knew you would be the first to reply, since I knew you were running this setup. Ive heard bad things about the add a leafs. Stiffer ride, and real bouncy, but in combo with the softer yj's maybe it isnt that bad.

SO just to make sure, with YJ springs alone(SPUA), I wont be able to fit my 31's? What about a lifted shackle, in combonation with the YJ kit? Is it possible? I know rockrat makes droplinks for YJ conversions so I could go that route. YJ's with 4.25" drop links all around?

Im in the same boat as you Daxe. I dont want to go screwing with my drivline and steering anlges too much.

GIVE IT UP FOR THE SPUA GUYS!

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post #4 of (permalink) Old 08-19-2003, 12:12 PM
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Re: YJ SPrings SPUA Questions??

</font><blockquote><font class="small">In reply to:</font><hr />
Stiffer ride, and real bouncy, but in combo with the softer yj's maybe it isnt that bad

[/ QUOTE ]

That is my thinking, as well. The add-a-leafs in the rear made my stock sprung sami handle a lot better and didnt wreck the ride as much as I thought, but that hardtop is a heavy unit, so maybe thats the difference.

</font><blockquote><font class="small">In reply to:</font><hr />
SO just to make sure, with YJ springs alone(SPUA), I wont be able to fit my 31's?

[/ QUOTE ]

Yeah, of course you will! Just don't plan on doing any serious offroading or even going over too many speedbumps without a lot of body mods. The link I posted from the body swap shows an unmodified sami tub on a chassis with YJs SPUA on missing links. There is maybe about 2 inches of uptravel available in the rear. The front would probably be worse, but the clip isnt on yet. I am going for the extra little lift to give me more up travel. Not for huge flex reasons, but because it doesnt make any sense to put a soft, compliant suspension on a vehicle then severely limit the amount it will compress. If it doesn't work out to use the 31s with the add-a-leafs I will just put the set of 30x9.5s I have on chrome wheels back on. I know I can get around well on the street without rubbing with those. Put in the add-a-leafs with the 30s and I would be in Scheafer City.

</font><blockquote><font class="small">In reply to:</font><hr />
What about a lifted shackle, in combonation with the YJ kit? Is it possible?

[/ QUOTE ]

The TT rear setup uses a long shackle..the missing links are optional. I believe the RRO Jpeater setup uses shackles in the front, too, so there's no apparent reason why you cant use shackles. I wouldnt try to go too long on the shackles for lift purposes, though. The YJs are soft in a side to side manner, as well, and longer shackles would probably just amplify that. I know some folks hated the YJs because the suspension got all floppy, but they were running SPOA. In my opinion, the YJs, even with missing links, SPUA (with Rancho 9000x mind you) ride and handle great. Lots better and more stable than the s/r setup ever felt.

</font><blockquote><font class="small">In reply to:</font><hr />
I dont want to go screwing with my drivline and steering anlges too much

[/ QUOTE ]

height is height though! 4.5" SPUA is the same from a steering and driveline standpoint as a 4.5" SPOA setup. The dynamics of the handling are different because of the axle location in relation to the springs, but the height is the same. If you get too high with a SPUA setup you wil have to correct driveline angles ans steering..though the steering ccorrection may be a different game because the steering parts dont cross the plane of the springs the way they do in a SPOA setup.

That's partly edducated conjecture, by the way, so if anyone knows better, please correct me.

~daxe
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post #5 of (permalink) Old 08-19-2003, 01:52 PM
 
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Re: YJ SPrings SPUA Questions??

or get the AFS and ARS kit from here http://www.northcoastoffroad.com/sam...uspensions.htm you will need to build some parts but the hard part is $190
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post #6 of (permalink) Old 08-19-2003, 04:38 PM Thread Starter
 
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Re: YJ SPrings SPUA Questions??

Daxe,
you are the man! Thanks for all the great information. You have been a great help. Now I just have to justify to the other half the money to be spent on it. Even though I think RRO is questionable as far as business practices are concerned I like the JPeater kit. I dont want to fabricate anything that someone has already designed and tested. My welding capabilities also suck. Anyway, Im going to run buy the local spring shop after work and see if they have any YJ's laying around. Then Im sure I will be sending you PM's when I get the kit. Although the installation doesnt look to be but a day in the driveway.
Maybe Capncrunch will come over and help me

Thanks again Daxe.

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post #7 of (permalink) Old 08-19-2003, 07:56 PM
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Re: YJ SPrings SPUA Questions??

Glad I could help. I'll do whatever I can to help after you get your stuff together, too.

And for the record, I have never bought anything from RRO and I won't do business with them based on nothing but their incredibly bad reputation. Oh well, their loss!

~daxe
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post #8 of (permalink) Old 08-19-2003, 08:33 PM
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Re: YJ SPrings SPUA Questions??

I like the csc kit cuz i personally like the s/r. Had it on that built scout 800 i had and absolutely loved it. Im stayin spua jus cuz im stubborn and dont really like spoa's that much.

So, to throw a whole new monkey wrench in this, how well will the csc s/r kit flex/ride with my 29" swampers. Id like to go to the 32x950's but i know thats pushin it while stayin spua.

I do a lot of logging trails, and mud so flex can actually be a bad thing at times, but stock flex sucks. And ride comfort is something i really couldnt care less about.

Anybody run the csc kit spua?

Thanks in advance,

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post #9 of (permalink) Old 08-19-2003, 08:52 PM
 
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Re: YJ SPrings SPUA Questions??

Guys, I would really think 3, 4 or even 5 times before going real big with YJs and being spring under. Im not an expert on it, but I DO have some experience on my own truck.

Firstly, I had 31s on the cheepo 15x8 steel rims. Prolly 3 1/4 inch backspace. Under compression, my tires rubbed the inside of the fenders pretty bad. There is a seam there that I tried to pound flat, but the lugs always managed to pull it back down and catch. Also, my tires caught on the springs in the back. Mostly on the drivers side, but there is a shiny spot on the passenger spring too.

I have a set of 2" backspace rims that I played around with fitting, and while it cured the spring rubbing in the back, the tires looked like they would impact the body right behind the headlights requiring some major trimming.

I could go into more details, but suffice to say that SPUA, YJs and 31s caused me to tear up the outside of my tires pretty bad. Either go spring over, or stay with smaller tires, maybe even as small as 29s.

Kevin
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post #10 of (permalink) Old 08-20-2003, 08:17 AM
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Re: YJ SPrings SPUA Questions??

Kamazuki;I have YJ's SPUA now also. I'm currently using Trail Tough's kit with Superlifts 1.5" lifted YJ springs.This setup has gotten me about 4.5" of lift. the 31/10.50 MT's clear with almost no rub. they only rub the spring a tad when at full lock but otherwise no other rubbing issues yet.
Bill
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