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Old 04-19-2011, 04:11 PM   #1
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new bump stops?

im lookin to get a 3.25inch suspension lift, and curious what bump stop extension i need to get, or if i need to get them..ill be on 31x10.5 tires

side note: lookin at rough country 3.25in lift (2.5in springs .75inch spacer) and using the supplied .75inch spacers in the back and getting 1.25 inch coil spacers in the front to level it some.
the kit doesnt come with bump stop extensions or pitman arm do i need them?..

any thoughts? thanks

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Old 04-19-2011, 04:20 PM   #2
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what is the lift going on? You forgot to tell us what you are working on!
If you get a lift-get bump stop extensions or you will take a good chance of destroying your shock absorbers....

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Old 04-19-2011, 04:28 PM   #3
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sorry 98 tj 6cyl
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Old 04-19-2011, 04:32 PM   #4
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there is a 3inch 4wd kit for roughly 700$ and it has bump stop ext and pit man arm..then id just add maybe teraflex coil spacers (1.25 front and .75 rear) but i am try to find out if its cheaper to get the rough country 3.25 and then just get front 1.25 spacers and pitman arm seperatley..i do like the progressive springs the RC has and the 2.2 shocks..dunno if its be better to get the 4wd with most everything or the other route
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Old 04-19-2011, 04:45 PM   #5
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So what brand is that 3" kit you are refering to? Sounds so far like you're better off with the Rough Country kit, and just finding better shocks down the road. Do NOT use a drop pitman arm on such a small lift. It will throw geometry off even more than it would be without it and can cause a lot of trouble down the road.
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Old 04-19-2011, 05:01 PM   #6
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the 3 inch brand is 4wheelparts...i like the rough country set up and shocks better but wasnt sure if it was a complete enough kit, i have read good reviews about the RC as well, and wondered if i should go with the 4wheelparts kit instead bc it had bump stops etc even if more $$, i just dont like the springs and shocks with the 4wheelparts ..and actually just doin the math with the RC and peice-mealing the rest i come up cheaper than doing the 4wheelparts by a lil over 100# all together. here are the too links if your curious..

Jeep TJ Suspension Lift

3" Suspension System by 4Wheel Drive Hardware® and Other Jeep Parts and Jeep Accessories by 4 Wheel Drive Hardware-RH3

here are the bumpstops i was looking at getting if i go with the RC which doesnt have them

Adjustable Bumpstops by JKS
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Old 04-19-2011, 05:24 PM   #7
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Quote:
Originally Posted by QCDoc View Post
ithe kit doesnt come with bump stop extensions or pitman arm do i need them?..

any thoughts? thanks
none of the RC kits include bumpstop extensions. you need to figure them out yourself.

and yes, you will need the bumpstop extensions. because you're going to run a 31x10.50R15 tire, the limiting factor will be your shocks.

Read here for a write up on how to determine your bumpstop height, while you're installing the lift:
http://www.wranglerforum.com/f5/corr...gth-70047.html
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Old 04-19-2011, 05:35 PM   #8
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ok thanks..ill check that out!
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Old 04-20-2011, 05:50 PM   #9
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unlimitedLJ04, i read that thread and i kinda get it..but im more of a visual and kinda new at this..my tires size is 31x10.5xr15..here are the shocks im gettin can u estimate the bumpstop height id need off the top ur head?

Rough Country Performance 2.2 Series Shocks

(question open to anyone) also do u agree with jwm1986 that i do not need a pitman arm?

(question open to anyone) also would u recommend gettin the 2.5 in kit with 1.25 front coil spring spacers and .75 rear coil spring spacers..or...2.5 kit and a 1.25 BL option..basically which will be harder to install and also which will run the risk of more complications after its on?

sorry for all the questions in this one..tryin to get it right the first time
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Old 04-20-2011, 06:47 PM   #10
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Quote:
Originally Posted by QCDoc View Post
unlimitedLJ04, i read that thread and i kinda get it..but im more of a visual and kinda new at this..my tires size is 31x10.5xr15..here are the shocks im gettin can u estimate the bumpstop height id need off the top ur head?

Rough Country Performance 2.2 Series Shocks
you need to call Rough Crap and ask them what the COLLAPSED length of the shocks are.

in the front:
13.5" collapsed length is the MAX that fits in the stock location with no bumpstop extension.
14.5" would require 1" bumpstop extension.
15.5" would require 2" bumpstop extension.
...you get the trend.

in the rear:
13" requires ~1" bumpstop extension.
14" requires ~2" bumpstop extension.
and so forth.

in the rear the bumpstop requirement changes drastically with lift height and CV shafts due to pinion rotation...so YOU need figure it out for YOUR rig...those numbers are just guidelines. and to figure these things out you need to pull your springs...or better yet do it while you install the lift and the springs are out!
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Old 04-21-2011, 04:05 PM   #11
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got ya that helps..ima def do it while im installing the lift..cheers
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Old 04-21-2011, 06:22 PM   #12
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Most lift kits come with extensions. Unless ur doing severe wheeling they should work fine
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Old 04-21-2011, 08:24 PM   #13
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the rough country kit doesnt, thus y i need to figure out the right ones to get...i wont be doin any major rock crawling or anything but i wont always be on black top if u know what i mean lol
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Old 04-21-2011, 10:06 PM   #14
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don't forget about coil bind. because you're going a poor direction, you'll need even more bumpstop in front to avoid coil bind. adding coil spacers reduces the amount of space your springs have to compress, so you need to add the height of the coil spacers back in with bumpstop extension. if you plan to use 1.25" spacers in front to level out the crappy spring rate Rough Junk gives you, then you're going to need to add 1.25" bumpstop extension, plus whatever you need for the shocks. the best way to do it is just buy springs taylored to the weight and length you want...then you can maximize uptravel.

fwiw, my rig sits nice and level on nothing but springs...no spacers at all.
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Old 04-21-2011, 10:40 PM   #15
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Quote:
Originally Posted by UnlimitedLJ04
if you plan to use 1.25" spacers in front to level out the crappy spring rate Rough Junk gives you, then you're going to need to add 1.25" bumpstop extension
X2

I made the mistake of running RC crap. I find hard to believe you could find a positive review on there lifts. The ride and articulation is poor at best. I switched to OME. The ride is amazing.

Don't take my word for it though look around and ask.

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