Which Zuk mod???
03-04-2011, 07:02 AM
#1
Which Zuk mod???
Alright,ive decided to put the AALs aside and do a zuk mod to fix the saggass syndrome.ive done my homework on both black magic springs and the jeep tj springs.my question is i cannot find anywhere the poundage on the 6cyl tj springs.anybody know? thanx
03-05-2011, 07:21 AM
#2
coil rating coil poundages
Hi cmna1---Found this valuable info on Jeepforum.com in a post.....hang onto this...it's interesting how varied the spring rates are between manufacturers....
cut/paste from this post......
http://www.jeepforum.com/forum/f9/fa...ements-638947/
From Rubicon Express customer service email to T.N. (November 2004):
The 3.5" TJ fronts are approximately 240 pounds per inch. Uncompressed free
length is 19"
The 4.5" TJ fronts are approximately 219 pounds per inch. Uncompressed free
length is 19.75"
XJ front springs
OEM is supposedly 147 lb/in rate.
Tera 4" TJ coils give 4.5" of lift on an XJ and have a 200 lb/in rate , 20.25" tall unloaded
Tera 3" TJ coils give 3.5" of lift on an XJ and have a 170 lb/in rate
Rusty's 4.5" coils give 5" of lift and have a 150 lb/in rate, 22" tall unloaded
RE's 4.5" ZJ coils give 6"-6.25" of lift on an XJ and have a 200 lb/in rate, 22" tall unloaded (RE ZJ coils are 240 lb/in)
Rustys 3" coils give 3" and have 150 lb/in rate.
Rancho 3" coils, at least the old coils give about 2 1/4" of lift on an XJ and have a very high 235 lb/in rate
Tera 4" TJ coils give 4.5" of lift on an XJ and have a 200 lb/in rate , 20.25" tall unloaded
Tera 3" TJ coils give 3.5" of lift on an XJ and have a 170 lb/in rate
Rusty's 4.5" coils give 5" of lift and have a 150 lb/in rate, 22" tall unloaded
RE's 4.5" ZJ coils give 6"-6.25" of lift on an XJ and have a 200 lb/in rate, 22" tall unloaded
Rustys 3" coils give 3" and have 150 lb/in rate.
Rancho 3" coils, at least the old coils I had give about 2 1/4" of lift on an XJ and have a very high 235 lb/in rate.
OEM is supposedly 147 lb/in rate.
OME coils give 2.25" - 2.5" of lift and have a 148 lb/in rate
OEM Old man EMU XJ is supposedly 142-147 lb/in rate. 17" length 5.25" diameter
OEM ZJ with 4.0 is supposedly 190 lb/in rate front and rear.
OME 930 coils: 160 lb. spring rate. 1.75" of lift on XJ
OME 934 coils: 180 lb. spring rate.The 934 spring is 35 mm (1.37") longer than the 930 spring.
The 930 is listed as a XJ or ZJ I-6 spring and the 934 is listed as a ZJ V-8 spring but is also used on the XJ. the 934 should give about 2.5in lift.
Tera 4" TJ coils have a 200 lb/in rate , 20.25" tall unloaded
Tera 3" TJ coils have a 170 lb/in rate
RE Rubicon Express 4.5in ZJ coils are 240 lb/in. give 5.5" ish of lift on an XJ 22" tall unloaded
RE 5.5XJ coils are 4.5ZJ coils.
Rusty's 6.5" 22" long, 12 wraps of 5/16" stock
Rusty's 4.5" coils give 5" of lift and have a 150 lb/in rate, 22" tall unloaded
Rustys 3" coils give 3" and have 150 lb/in rate.
Rancho 3" coils, at least the old coils give about 2 1/4" of lift on an XJ and have a very high 235 lb/in rate.
Rockkrawler 6.5" are 165 lbs/in
SJ Sky Jacker 3" ZJ coils 218 lbs/in
SJ 6in XJ RR coil is 13 coils and same height and thickness as the RE ZJ4.5in XJ5.5in coil.
Last edited by ZUK; 03-05-2011 at 07:36 AM.
03-17-2011, 08:14 AM
#4
first of all,thanx everyone for the info!!!! i ended up going with the 125lb 14" springs.got the whole thing in in 3 hours including installation of the new bumpstops.this was easier than replaceing my freakin antenna !!!! the only reason i didntn go with the tj springs is because i was leary of creaking after time and tire clearance . its my DD and weekend warrior soooooo...im probably going to do a small bj spacer to even it out some.any suggestions on what size,i was thinkin the 1.5 would work?
Last edited by cman1; 03-17-2011 at 08:15 AM.
03-17-2011, 08:26 AM
#5
Registered User
first of all,thanx everyone for the info!!!! i ended up going with the 125lb 14" springs.got the whole thing in in 3 hours including installation of the new bumpstops.this was easier than replaceing my freakin antenna !!!! the only reason i didntn go with the tj springs is because i was leary of creaking after time and tire clearance . its my DD and weekend warrior soooooo...im probably going to do a small bj spacer to even it out some.any suggestions on what size,i was thinkin the 1.5 would work?
03-17-2011, 10:18 AM
#7
www.southwestspeed.com, i actually went on ebay, zuk has a couple links in his zuk mod thread,one for the 12" 150lb springs and one for the 14" 125lders.71.00 a pair shipped.
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03-17-2011, 11:12 AM
#8
Registered User
Same as Ricky, got the 14x 125 springs and used a 1.5 bj spacer to level it out. Now I have bilsteins all around and it rides awesome.
03-17-2011, 11:16 AM
#9
Registered User
03-17-2011, 11:23 AM
#10
Registered User
Well they are the stock height, not extended. But they work just fine. I can grab em for you if you like, but I am sure you can look it up just as fast.
03-17-2011, 11:34 AM
#11
Registered User
03-18-2011, 12:32 PM
#12
first of all,thanx everyone for the info!!!! i ended up going with the 125lb 14" springs.got the whole thing in in 3 hours including installation of the new bumpstops.this was easier than replaceing my freakin antenna !!!! the only reason i didntn go with the tj springs is because i was leary of creaking after time and tire clearance . its my DD and weekend warrior soooooo...im probably going to do a small bj spacer to even it out some.any suggestions on what size,i was thinkin the 1.5 would work?
03-18-2011, 12:36 PM
#13
www.southwestspeed.com, i actually went on ebay, zuk has a couple links in his zuk mod thread,one for the 12" 150lb springs and one for the 14" 125lders.71.00 a pair shipped.
http://cgi.ebay.com/ebaymotors/NEW-R...mZ290014125492
The 12" coils are available in 125 pound and up rating
http://cgi.ebay.com/ebaymotors/NEW-R...mZ290014123883
03-29-2011, 11:36 PM
#15
O.K ZUK, i was waiting until i could get some descent pics to post.To start out with ,the springs were sitting flat on the overloads and my bumpstops were missing!!,made a nice racket when you hit a big bump,basically frame on frame.sooooo, ,jacked up the truck to put jack stands under the rear end and took off the wheels, then put the jack under the hitch and raised the rear of the truck enough to take the weight off,then used a bottle jack in between the leaf spring and the frame and spread it apart enough to be able set the coil spring (125# 14")on my lower bump stop and from the inside of the frame,another little tip i just remembered,my bottle jack wasnt quite high enough,so i used the upper (metal) bump stop i had cut off as a spacer on top of the leaf spring to set the jack on...if that makes sense.
i used a long huge screwdriver to pop the spring into the purch that i made out of the upper bracket.when you cut it short the spring really fits great . i actually EASILY popped it in with a hammer.i also did about two turns on my TBs . heres some pics of before and after.
BEFORE
AFTER
Ive been driving it for about two weeks now and am amazed at what a difference. Im debating on weather to even bother with the BJ spacers?!
heres a couple pics of the springs
Again ,thanx guys!!!!!
i used a long huge screwdriver to pop the spring into the purch that i made out of the upper bracket.when you cut it short the spring really fits great . i actually EASILY popped it in with a hammer.i also did about two turns on my TBs . heres some pics of before and after.
BEFORE
AFTER
Ive been driving it for about two weeks now and am amazed at what a difference. Im debating on weather to even bother with the BJ spacers?!
heres a couple pics of the springs
Again ,thanx guys!!!!!
Last edited by cman1; 03-31-2011 at 10:21 AM.
03-30-2011, 09:47 PM
#18
Nice cman1.....It sounds like it took alot to get the coil to pop in place....drop the wheel as far as it would go....bottle jack to stretch the leafs down even lower....and a BMF screwdriver. I guess that means that you have a better chance of finding ice in hell than a coil on the ground.
By the way, what's all that brownish red stuff on the axle housing/muffler/leafpacks?
By the way, what's all that brownish red stuff on the axle housing/muffler/leafpacks?
03-30-2011, 10:02 PM
#20
cman1-- Mind if I use the pics and text to make a link? Make ya famous .....at least with the Yota guys. The link will look something like this...I still need to copy/paste your text http://gearinstalls.com/cman1.htm
You have a lot of rust on everything. The frame is probably getting thinner by the hour. The cool thing about the coil is it now transfers a large part of the leafpack load to a stronger thicker part of the frame farther from the actual end of the frame. So now, the end shackles are not straining the hell out of the frame.
Looks like you have a solid 4 inch lift now. I like the rake look and don't see the need for BJ spacers. Others would want them.
By the way, you mentioned you cranked the torsion bars 2 full turns each. I did a similar thingh to my 87 Runner but I did it 12 turns each as I recall and that gave me a 1.5" lift. So, I figure that means that your 2 turns fixed you up with 1/4" of hardcore lift
.....at least with the Yota guys. The link will look something like this...I still need to copy/paste your text http://gearinstalls.com/cman1.htmYou have a lot of rust on everything. The frame is probably getting thinner by the hour. The cool thing about the coil is it now transfers a large part of the leafpack load to a stronger thicker part of the frame farther from the actual end of the frame. So now, the end shackles are not straining the hell out of the frame.
Looks like you have a solid 4 inch lift now. I like the rake look and don't see the need for BJ spacers. Others would want them.
By the way, you mentioned you cranked the torsion bars 2 full turns each. I did a similar thingh to my 87 Runner but I did it 12 turns each as I recall and that gave me a 1.5" lift. So, I figure that means that your 2 turns fixed you up with 1/4" of hardcore lift
Last edited by ZUK; 03-30-2011 at 11:08 PM.
