Bilstein Valving for Lifted ZJ - JeepForum.com

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post #1 of 17 Old 10-28-2013, 07:10 PM Thread Starter
AAA
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Bilstein Valving for Lifted ZJ

I'd like to hear only from people who have experience with a similar setup to mine, please.

I have a 97 ZJ with 5.25" lift (RE 4.5" kit w/ 3.5" springs and 1.75" puck), skid plates, steel bumper w/ winch, etc. I am running Bilstein 5100's for the 6" lift (24-185943), but they are too soft offroad. I feel that the nose wants to dive while driving over rocks and dips unless I go way slow, but I love the way it flexes while crawling - I get a ton of flex. I found out the valving is 126/47 front, and 255/70 rear. What would you recommend I revalve the fronts to? I know standard options from Bilstein are 170/60, 255/70 and 360/80. This Jeep is 65% offroad trails like Calico - Doran, Odessa, Big Bear, etc. (Not the Gatekeeper at Calico).

If you have bilstein's with a similar setup to mine and you like it, what are yours valved at, and what kind of trails do you run?

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post #2 of 17 Old 10-28-2013, 07:23 PM
BoostinBubba
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I'll be honest, I don't have direct experience with a similar setup, but I do have a TON of suspension experience in general, the problem you describe is a function of spring rate, I really don't think changing valving is going to help, unless you were to stiffen the hell out of your compression stack, but then it would ride like crap.
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post #3 of 17 Old 10-28-2013, 09:44 PM
Technohead
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I have 255/70 at all four corners. 5.5" Rustys springs, Clayton long arm, steel bumpers, winch. 90% offroad rock crawling. No complaints.
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post #4 of 17 Old 10-29-2013, 09:42 AM
WhiteOut
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Bilstein 5125 on all 4 corners with the 255/70 rate. Basically same specs as Techno, but I do more trails than rock gardens. They are still a bit light when the front unloads at high speed. My understanding is that all Bilsteins are a bit soft.

Overall I'm very happy though.
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post #5 of 17 Old 10-29-2013, 10:02 AM Thread Starter
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Quote:
Originally Posted by WhiteOut View Post
Bilstein 5125 on all 4 corners with the 255/70 rate. Basically same specs as Techno, but I do more trails than rock gardens. They are still a bit light when the front unloads at high speed. My understanding is that all Bilsteins are a bit soft.

Overall I'm very happy though.

So, if you could start all over and get just a little stiffer valving, would you? I think the 360/80 might be too stiff, but would you go somewhere in between 255/70 and 360/80?
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post #6 of 17 Old 10-29-2013, 10:06 AM Thread Starter
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Quote:
Originally Posted by Technohead View Post
I have 255/70 at all four corners. 5.5" Rustys springs, Clayton long arm, steel bumpers, winch. 90% offroad rock crawling. No complaints.

Did you order your shocks with that valving, or did they just come like that? My fronts came stock with really low rebound/compression rate, and they said they didn't offer stiffer valving - I would have to get them custom valved.
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post #7 of 17 Old 10-29-2013, 10:48 AM
WhiteOut
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Quote:
Originally Posted by AAA View Post
So, if you could start all over and get just a little stiffer valving, would you? I think the 360/80 might be too stiff, but would you go somewhere in between 255/70 and 360/80?
I'm happy with the way they perform. I'd go the same route if I was doing it again.
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post #8 of 17 Old 10-29-2013, 03:28 PM Thread Starter
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Originally Posted by WhiteOut View Post
I'm happy with the way they perform. I'd go the same route if I was doing it again.

Awesome, thanks!
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post #9 of 17 Old 10-29-2013, 06:51 PM
Technohead
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Quote:
Originally Posted by AAA View Post
Did you order your shocks with that valving, or did they just come like that? My fronts came stock with really low rebound/compression rate, and they said they didn't offer stiffer valving - I would have to get them custom valved.
I have 5125's. Exact same shock at all 4 corners.
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post #10 of 17 Old 10-31-2013, 07:24 AM
dougmorgan99
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My setup is Bilstein 5100s, IRO 3.5 lift with new rear IRO springs, front steel bumper with Warn winch, rear steel bumper plus tire carrier with 2" puck in rear (lost original height because of bumper), full factor skids, rock rails, light bars and roof rack. Lots of metal to sling around as you can tell...

I had better control offroad from the cheapy RC Hydro shocks that came with the kit versus the Bilstein I bought to replace them. I whole lot less body sway with the RC and all that armor. Don't know the valving on the Bilsteins... (get info off sticker on the shocks?)... So needless to say the RC was very rough and stiff for onroad while Bilstein are smooth as butter onroad. If I was going to turn my Jeep to a dedicated trail rig, I would put RC back on...

I don't rock crawl but built mine expedition style for a bunch of camping I do for my son's Boy Scout trips. I do light and medium trails with a bit of mud whenever it rains. 90% of the time it is on asphalt and my DD.
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post #11 of 17 Old 10-31-2013, 10:16 AM
speedbucket
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I have5125 255/70 14" for the front and rear Is garbage hydros. General rule of thumb from my engineering/fabrication buddy is stiffer front, softer rear iirc. I haven't put the bilsteins on yet because of some fab work I have to do to accomodate them, but they will definitely ride better than the hydros, I'm not too worried BC with my link setup it actually rides/handles better than bonestock at around 6" of lift. I kinda wish I would have got the 16" travel because I'll be using every bit of the 14s as it sits now

http://www.jeepforum.com/forum/f22/speedbuckets-zj-build-1361322/
V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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post #12 of 17 Old 11-07-2013, 10:16 AM Thread Starter
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Well, after reading what everyone had to say, I decided to send in my front shocks (5100's currently rated at 126/47) to have them revalved to 275/78. The rears are already 255/70, so I think that should give me a really good setup for crawling as well as street. With the 126/47 valving, the front wanted to nose dive when coming off of rocks or hitting a dip or rut in the trail while being disconnected. It should be a couple of weeks before I get them back, so I'll post up what difference the revalving makes.
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post #13 of 17 Old 11-07-2013, 01:04 PM
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How much are they charging you to revalve the front 5100s? Did you talk to Shane over at Bilstein?

Kolak Performance and Offroad
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kolak@aol.com or kolak@kolakperformance.com
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post #14 of 17 Old 11-07-2013, 07:25 PM Thread Starter
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Quote:
Originally Posted by Kolak View Post
How much are they charging you to revalve the front 5100s? Did you talk to Shane over at Bilstein?

Hi Kolak,
I have been dealing with Juan. Supposedly, I'm getting a good deal. I'll PM you the details.
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post #15 of 17 Old 01-10-2014, 06:55 AM
IronWagon
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Any results with the revalved Bilsteins?
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