Bilstein 5100 series strut - Page 5 - JeepForum.com

Reply
 
LinkBack Thread Tools
post #61 of 339 Old 09-26-2013, 02:24 PM
Flyboys
Registered User
2015 JK Wrangler 
 
Join Date: Aug 2013
Location: Cherry Hill
Posts: 51
Quote:
Originally Posted by ca07wk View Post
I dont think itll compress the spring much more then it is now, your just raising the lower spring purch makng the spring sit higher up on the strut body. I would try the Bilstein set to 2" without the spacer first.
But wouldn't the spring be compressed at least another inch?


2015 Willys JKU
2014 Ram CC Sport
Flyboys is offline  
Sponsored Links
Advertisement
 
post #62 of 339 Old 09-26-2013, 02:46 PM
zc911
Registered User
 
Join Date: Jun 2013
Location: brampton
Posts: 256
no the cup the spring sits in gets moved up and the shock just extends further out
zc911 is offline  
post #63 of 339 Old 09-26-2013, 03:13 PM
sk1er18
Registered User
2007 XK Commander 
 
Join Date: Mar 2007
Location: NJ
Posts: 1,497
The shock doesnt get extended.

Raising the lower perch adds preload to the spring. Its just like adding a coil spring spacer in the assembly. Fully extended length of the assembly remains constant.

-Matt
sk1er18 is offline  
post #64 of 339 Old 09-26-2013, 03:25 PM
zc911
Registered User
 
Join Date: Jun 2013
Location: brampton
Posts: 256
i thought the extended length would have jsut increased
zc911 is offline  
post #65 of 339 Old 09-26-2013, 03:28 PM
sk1er18
Registered User
2007 XK Commander 
 
Join Date: Mar 2007
Location: NJ
Posts: 1,497
Quote:
Originally Posted by zc911 View Post
i thought the extended length would have jsut increased
It doesnt.

Fully extended length stays the same. Move spring perch up = add preload to spring = lift.

One of the benefits that Bilstien touts is that these dont hyper extend the front end at full drop.

-Matt
sk1er18 is offline  
post #66 of 339 Old 09-26-2013, 09:14 PM
sunrcr69
Registered User
2005 WK 
 
Join Date: Aug 2011
Location: Parker
Posts: 350
Read up
http://www.bilsteinus.com/fileadmin/...WebArticle.pdf
Preload is not added to the spring when it is adjusted to the higher settings. The shock has longer than stock travel therefore the whole assembly gets longer = lift.

2005 WK 5.7L Hemi, RC 2" BB + fabrication = 3.5" lift, JK Rubicon Tires & Wheels, 1.25" Spacers, Fabricated Skidplate, Fabricated Recovery Points, Airaid CAI, Superchips, HIDs RED WK Club #10
sunrcr69 is offline  
post #67 of 339 Old 09-26-2013, 09:29 PM
sk1er18
Registered User
2007 XK Commander 
 
Join Date: Mar 2007
Location: NJ
Posts: 1,497
Quote:
Originally Posted by sunrcr69 View Post
Read up
http://www.bilsteinus.com/fileadmin/...WebArticle.pdf
Preload is not added to the spring when it is adjusted to the higher settings. The shock has longer than stock travel therefore the whole assembly gets longer = lift.
Well it looks like we're both partially wrong

First and foremost- the strut is longer than stock by 1/2-3/4" (cool stuff, glad to see ).

It also increases pre-load. The fully extended length is the same regardless of which "setting" its on. It doesn't get any longer whether its on its lowest setting vs its highest setting.

The brochure you linked even details how the rebound valving of the 5100 is specifically designed to account for the additional preload (whereas throwing a coil spacer in a stock assembly isn't ideal).

-Matt
sk1er18 is offline  
post #68 of 339 Old 09-26-2013, 09:37 PM
sk1er18
Registered User
2007 XK Commander 
 
Join Date: Mar 2007
Location: NJ
Posts: 1,497
Here's a good visual that'll help show you how/why pre-load is added to achieve lift (its for the 5100s but a different application that has a few more settings).


-Matt
sk1er18 is offline  
post #69 of 339 Old 09-26-2013, 09:55 PM
sunrcr69
Registered User
2005 WK 
 
Join Date: Aug 2011
Location: Parker
Posts: 350
From the article - "Bilstein 5100 Series Leveling Shocks are longer than the O.E. shocks by 1/2” to 3/4”, depending on application. Now when the ride height of the
vehicle is increased by 2”, the Bilstein 5100 Series Leveling Shocks offer additional droop. By maintaining the factory up-travel, this combines for an
increase in overall wheel travel. The result is the lift you’re looking for - along with a great ride."

It says it maintains the factory uptravel. How would that be possible if there is preload on the spring?
Preload on the spring = less travel due to the spring being partially compressed. The spring would bind if compressed the same distance as stock while preloaded.

2005 WK 5.7L Hemi, RC 2" BB + fabrication = 3.5" lift, JK Rubicon Tires & Wheels, 1.25" Spacers, Fabricated Skidplate, Fabricated Recovery Points, Airaid CAI, Superchips, HIDs RED WK Club #10
sunrcr69 is offline  
post #70 of 339 Old 09-26-2013, 09:58 PM
sk1er18
Registered User
2007 XK Commander 
 
Join Date: Mar 2007
Location: NJ
Posts: 1,497
Quote:
Originally Posted by sunrcr69 View Post
It says it maintains the factory uptravel. How would that be possible if there is preload on the spring?
Preload on the spring = less travel due to the spring being partially compressed. The spring would bind if compressed the same distance as stock while preloaded.
No, additional preload on the spring doesnt equate to less up-travel.

There is still plenty of compression left in the spring, even when pre-loaded.

I'm not sure how else to explain it without a scratchpad (and some beers), but if you've ever assembled a strut you'd know that moving the lower perch upwards will result in spring preload. It doesn't magically add more travel... there's already enough preload on the spring that the strut extends to its max position without any load/weight on it.

-Matt
sk1er18 is offline  
post #71 of 339 Old 09-26-2013, 10:26 PM
sunrcr69
Registered User
2005 WK 
 
Join Date: Aug 2011
Location: Parker
Posts: 350
I get it (and I've assembled 1000s of struts/coilovers). You are right, there is preload added, but not enough to get coil bind.
I would need the same scratchpad and more beers to explain my original theory

2005 WK 5.7L Hemi, RC 2" BB + fabrication = 3.5" lift, JK Rubicon Tires & Wheels, 1.25" Spacers, Fabricated Skidplate, Fabricated Recovery Points, Airaid CAI, Superchips, HIDs RED WK Club #10
sunrcr69 is offline  
post #72 of 339 Old 09-26-2013, 10:30 PM
sk1er18
Registered User
2007 XK Commander 
 
Join Date: Mar 2007
Location: NJ
Posts: 1,497
nothing like talking about jeeps/suspension/mods over a few beers! It's possibly one of the best parts of this type of hobby

-Matt
sk1er18 is offline  
post #73 of 339 Old 09-27-2013, 07:10 AM
Flyboys
Registered User
2015 JK Wrangler 
 
Join Date: Aug 2013
Location: Cherry Hill
Posts: 51
Well think I'm gonna just take out the RC 2" spacer lift in the front and then adjust the Bilsteins too 2" and call it a day. Hope to report back later tonight on tomorrow.

2015 Willys JKU
2014 Ram CC Sport
Flyboys is offline  
post #74 of 339 Old 09-27-2013, 08:20 PM
onlyone
Registered User
 
onlyone's Avatar
2014 JK Wrangler 
 
Join Date: Jan 2004
Posts: 2,172
I am having the 5100's installed with a 1.5 inch spacer in the back along with the rear 5100's on Thursday of next week. I will post up some pics and let everyone know how they ride when done.

Thank you Jesus
2014 Wrangler Sport 1.5" spacers in front .75 rear, 1" BL 255/80/17 BFG KM2
onlyone is offline  
post #75 of 339 Old 09-28-2013, 04:47 PM
Flyboys
Registered User
2015 JK Wrangler 
 
Join Date: Aug 2013
Location: Cherry Hill
Posts: 51
Took out the 2" RC spacer in front and adjusted the Bilsteins to max 2". Also still have the RC" spacer in rear with rear Bilstein 5100's as well. Put a 8mm spacer up front. Love it! The ride is awesome, very pleased!
Attached Images
       

2015 Willys JKU
2014 Ram CC Sport
Flyboys is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome