LJ Antisquat questions - JeepForum.com

 
LinkBack Thread Tools
post #1 of 13 Old 06-17-2013, 11:09 AM Thread Starter
rrobbins
Registered User
2005 LJ Wrangler 
 
Join Date: Apr 2013
Location: San Jose
Posts: 186
LJ Antisquat questions

My LJ on 3.5" springs and stock rear arms (bought it this way, saving for currie savvy setup)has real bad rise on acceleration. Just curious how the Savvy/Currie is in this regard. Seems the Antisquat is just way off with the current setup but I can live with it until I can buy the new stuff.

rrobbins is offline  
Sponsored Links
Advertisement
 
post #2 of 13 Old 06-17-2013, 11:21 AM
Unlimited04
This post/info=my opinion
 
Unlimited04's Avatar
2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
Posts: 24,173
Unlimited04 is offline  
post #3 of 13 Old 06-17-2013, 11:38 AM Thread Starter
rrobbins
Registered User
2005 LJ Wrangler 
 
Join Date: Apr 2013
Location: San Jose
Posts: 186
I thought over that option and it will likely end up happening at a later point. I am just curious how the currie/savvy system is with this. I have only heard good htings about it but seems with fixed control arm mounts, and fixed length control arms (stock wheelbase so only adjusted to keep it at the correct wheelbase/angles) then the antisquat would happen with any lift of this type, that being 4 ish inches with stock control arm length and mounts. Possbily the spring rates and shocks help dramatically tho? Thanks for any input.
rrobbins is offline  
post #4 of 13 Old 06-17-2013, 12:00 PM
Imped
Registered User
2004 TJ Wrangler 
 
Join Date: Feb 2008
Location: Indianapolis
Posts: 20,311
Why would changing the control arms change the instant center location (that's a large determinant in how your rear suspension behaves once weight is transferred to that end)? IC location is a function of arm length and mount position. Slight changes in arm length won't make a noticeable difference.

What kind of results do you get when you line up to a steep wall and attempt to climb it? Do your tires spin or does your rig buck and hop?

OlllllllO
Float Test Build
IndyORV
Imped is offline  
post #5 of 13 Old 06-17-2013, 12:41 PM Thread Starter
rrobbins
Registered User
2005 LJ Wrangler 
 
Join Date: Apr 2013
Location: San Jose
Posts: 186
I haven't even had it out wheeling much. Bought it 2 months ago. I will be getting rid of the stock arms and RE coils and going to the Currie/Savvy set up. The jeep currently rises a lot on acceleration on the street. As stated not much offroad time in it yet.

I don't expect the geometry of any of these short arm kits to change much, they can't with fixed geometry. Just curious from seat of the pants driving how the currie/savvy is for acceleration rise.
rrobbins is offline  
post #6 of 13 Old 06-17-2013, 12:42 PM Thread Starter
rrobbins
Registered User
2005 LJ Wrangler 
 
Join Date: Apr 2013
Location: San Jose
Posts: 186
The RE Coils on stock rear arms and some random fronts buck around pretty bad too on the street. Just looking for seat of the pants experience with currie/savvy in these regards.
rrobbins is offline  
post #7 of 13 Old 06-17-2013, 12:48 PM
Imped
Registered User
2004 TJ Wrangler 
 
Join Date: Feb 2008
Location: Indianapolis
Posts: 20,311
The rise under acceleration has nothing to do with what control arms you have. It is purely a function of the IC location, which will not change with different control arms. You said it yourself so I'm not sure what you're misunderstanding.....
Quote:
Originally Posted by rrobbins View Post

I don't expect the geometry of any of these short arm kits to change much, they can't with fixed geometry.

OlllllllO
Float Test Build
IndyORV
Imped is offline  
post #8 of 13 Old 06-17-2013, 12:50 PM
biffgnar
Moderator
 
biffgnar's Avatar
2006 TJ Wrangler 
 
Join Date: May 2008
Location: Westchester, NY
Posts: 19,947
Sounds to me like you might really be asking a question about springs and shocks (given that you aren't changing geometry).

#LetGaryDebate
biffgnar is offline  
post #9 of 13 Old 06-17-2013, 01:02 PM
ftgiles
Registered User
 
Join Date: Jun 2008
Location: Phoenix
Posts: 1,763
Quote:
Originally Posted by biffgnar View Post
Sounds to me like you might really be asking a question about springs and shocks (given that you aren't changing geometry).
After your geometry is set, whether by choice or not, the next step is spring selection and then shock selection and tuning.
ftgiles is offline  
post #10 of 13 Old 06-17-2013, 01:03 PM
Imped
Registered User
2004 TJ Wrangler 
 
Join Date: Feb 2008
Location: Indianapolis
Posts: 20,311
Quote:
Originally Posted by biffgnar View Post
Sounds to me like you might really be asking a question about springs and shocks (given that you aren't changing geometry).
He may be. If that's the case, as long as the rear is rising under acceleration for geometric reasons, springs and shocks won't fix that.

OlllllllO
Float Test Build
IndyORV
Imped is offline  
post #11 of 13 Old 06-17-2013, 01:08 PM
TheBoogieman
Disturbed
 
TheBoogieman's Avatar
2003 TJ Wrangler 
 
Join Date: Aug 2006
Location: CharlottesHELL
Posts: 33,468
Quote:
Originally Posted by ftgiles View Post
After your geometry is set.
Damn, I knew there was a reason for this crap!

Quote:
Originally Posted by mrblaine View Post
Springs have one job and one job only and it isn't to affect, determine, or create ride quality.
Quote:
Originally Posted by jrallen View Post
I'd rather get circumcised as an adult with no anesthesia than pull an exhaust manifold with precats underneath.
TheBoogieman is offline  
post #12 of 13 Old 06-17-2013, 01:29 PM Thread Starter
rrobbins
Registered User
2005 LJ Wrangler 
 
Join Date: Apr 2013
Location: San Jose
Posts: 186
Geometry will all be set I understand that. Apologies if I am making myself unclear. Maybe I should have said actual driving antisquat, not the calculated number. And I am probably asking more about springs and shocks and how the entire Savvy/Curry setup together does with anti squat. Not just the number a calculator will put out.

Springs/shocks won't make as much change in acceleration rise as the geometry does. But imagine if you had infinitely firm rebound damping on a shock, or a spring that was for a dump truck with an incredible high/large spring rate. Both of these scenarios would basically limit your suspension and probably make it not move at all. Giving you zero "practical" antisquat while accelerating. Yes the equations would still give you a high antsquat number but if your suspension can move it won't give you any real world antisquat.

So with Savvy's magical spring rates, and probably the fox IFP's they worked on, are people still noticing a lot of acceleration rise and general bouncing around from bumps. I've read nothing but good reviews on the suspension but just looking for more info. If anyone has it that's great, if not not big deal either.

-Cheers
rrobbins is offline  
post #13 of 13 Old 06-17-2013, 01:41 PM
ftgiles
Registered User
 
Join Date: Jun 2008
Location: Phoenix
Posts: 1,763
Quote:
Originally Posted by rrobbins View Post
imagine if you had infinitely firm rebound damping on a shock, or a spring that was for a dump truck with an incredible high/large spring rate. Both of these scenarios would basically limit your suspension and probably make it not move at all. Giving you zero "practical" antisquat while accelerating. Yes the equations would still give you a high antsquat number but if your suspension can move it won't give you any real world antisquat.

You are right. That's exactly how it works. Stiffer may help in some regards and it will hurt in others. You can't have it all. You get to choose some characteristics and the rest will be chosen for you.
ftgiles 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