Advantages of 4 Link Rear vs. Leafs? - Ford Muscle Forums : Ford Muscle Cars Tech Forum
FordMuscleForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 02-05-2009, 09:54 PM   #1 (permalink)
Subscriber
 
Join Date: Aug 2001
Posts: 2,908
Advantages of 4 Link Rear vs. Leafs?

All,

Sorry for the novice question, but I'm not sure how a four link rear suspension outperforms a leaf sprung rear. Could someone explain? Is a 4 link intended just for drag racing, or is it considered a good street performing set up also? A comparison between 4 link and leafs would be much appreciated.

Thanks.
__________________

HankyJ


HankyJ is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 02-05-2009, 10:05 PM   #2 (permalink)
Registered User
 
Join Date: May 2007
Location: Salisbury, NC
Posts: 194
Re: Advantages of 4 Link Rear vs. Leafs?

in every way possible except price.

leaf springs setup are notorious for wheel hop because of spring wrap up. Under power the rear axle pinion will try to rotate up causing the spring to become s shape and straiten out causing the hop.
There are traction aids for leaf spring suspension in the form of Pinion snubbers, slapper/traction bars and leaf links.

Leaf spring Pros: inexpensive, no laterlal loacting device needed.

4 Links have been used in production cars for a long time in one form or another. They can be adjusted for any type of situation, street, drag, road course. They are simple yet complex. In the attempt to rotate upward the rear end housing will pull on the top links and push on the lower links. There will be no wheel hop because the links cannot bend therefor planting the tires into the pavement and pushing the car forward. In a street car the links should be position parallel so they don't bind on a turn, though is easily adjusted for drag. If it it just a regular 4 link you will need a Lateral Locating device (something to hole the rear end from side to side) aka a track bar or watts link. A better alternative is a triangulate 4 link that will provide the same aspects of a regular 4 link plus hold the axle side to side. Triangulated 4 links have been used in production cars including the mustang for a long time. Have good street manners with great traction, but always have room for improvement. There is alot of factors the goes into fabricating and setting up a 4 link suspension and should only be used if you understand the effects.

Cons: expensive, difficult to fabricate in some cars.
__________________
83 FULLSIZE Bronco - 357W Comp Extreme 4x4 cam. Edelbrock Performer Intake and 600cfm Toilet Bowl.

Last edited by 83broncodude; 02-05-2009 at 10:47 PM.
83broncodude is offline   Reply With Quote Quick reply to this message
Old 02-06-2009, 05:01 AM   #3 (permalink)
Registered User
 
Join Date: Jul 2005
Posts: 1,125
Re: Advantages of 4 Link Rear vs. Leafs?

Yeah, what he said but triangular 4-links are not ideal by a long shot. Especially w/ those on the Foxes since every Fox owner, in the pursuit of handling, replaces the upper links for a torque arm or single upper link.
bassman97 is offline   Reply With Quote Quick reply to this message
Old 02-06-2009, 08:09 AM   #4 (permalink)
Registered User
 
Join Date: Apr 2002
Location: Merkel, Tx
Posts: 9,251
Re: Advantages of 4 Link Rear vs. Leafs?

A four link has hundreds of tuning points, so you can dial in just about any condition. The down side is that you have to cut the car and typically lose the rear seat area to properly fit a real four link. Leafs wtih CalTrac bars and tunable shocks will run way down into the 10s, 9s without a problem, so you have to either be building a purpose built race car, really want the four link or be making a lot of power to go with the four link.
__________________
1967 Falcon 4 door 351C - 70 Mustang 351C
Owner built, owner abused.
ckelly is offline   Reply With Quote Quick reply to this message
Old 02-06-2009, 11:04 AM   #5 (permalink)
Subscriber
 
Join Date: Jul 2004
Posts: 1,741
Re: Advantages of 4 Link Rear vs. Leafs?

From the suspension fabricators book I own, they state the best rear suspension handling wise is a three link with a torque arm and a watts link to locate it. I run a leaf spring rear with Shelby under-ride bars. They are 5 leafs with urethane bushings and bad shocks. The car handles very well, even with the bad shocks.
ujt389 is offline   Reply With Quote Quick reply to this message
Old 02-06-2009, 02:27 PM   #6 (permalink)
Registered User
 
Join Date: Apr 2002
Posts: 429
Re: Advantages of 4 Link Rear vs. Leafs?

What happens if you want to turn corners instead of go straight?

Do the caltracs help any with that?
__________________
Jeremy Wilson
1969 Ford Torino GT Fastback
351W 4-speed
NasalGoat is offline   Reply With Quote Quick reply to this message
Old 02-06-2009, 08:25 PM   #7 (permalink)
Registered User
 
Join Date: May 2007
Location: Salisbury, NC
Posts: 194
Re: Advantages of 4 Link Rear vs. Leafs?

turn corners = ditch the solid rear axle.
__________________
83 FULLSIZE Bronco - 357W Comp Extreme 4x4 cam. Edelbrock Performer Intake and 600cfm Toilet Bowl.
83broncodude is offline   Reply With Quote Quick reply to this message
Old 02-07-2009, 11:03 AM   #8 (permalink)
Subscriber
 
Join Date: Aug 2001
Posts: 2,908
Re: Advantages of 4 Link Rear vs. Leafs?

Great explanation, BroncoDude. All, thanks for the replies.

When I hear, "If you want to turn corners, ditch the solid axle," is that meaning for hardcore corner carving, or even every day street performance? Am I to understand that basically a four-link is useful for drags rather than any kind of street performance?
__________________

HankyJ


HankyJ is offline   Reply With Quote Quick reply to this message
Old 02-07-2009, 12:11 PM   #9 (permalink)
Subscriber
 
Join Date: Jul 2004
Posts: 1,741
Re: Advantages of 4 Link Rear vs. Leafs?

I have to disagree with you Broncodude. I have seen lots and lots of race cars and good handling street cars with solid axles. A solid axle will actually help to keep both of the back tires planted squarely on the ground. Solid axles are only undesireable because they make for a harsher ride because the bumps and dips on one side affect both rear tires. IRS systems isolate the bumps and dips making for a smoother ride, although it is harder (from and engineering standpoint) to make both rear tires grip equally or as well as a solid axle. Although I am fan of NASCAR they do handle very well, and all use solid axle housings.
ujt389 is offline   Reply With Quote Quick reply to this message
Old 02-07-2009, 01:34 PM   #10 (permalink)
Registered User
 
Join Date: Jan 2002
Posts: 130
Re: Advantages of 4 Link Rear vs. Leafs?

Ditto to what ujt389 said
My old school junk 65 gt350 replica with 5leaf reverse eyes and outdated KYB non adjustable gas shocks (no swaybar) has suprised many a ZO6 Vetts at Thunderhill raceway on opentrac days
stoker is offline   Reply With Quote Quick reply to this message
Old 02-07-2009, 03:52 PM   #11 (permalink)
Registered User
 
Join Date: May 2007
Location: Salisbury, NC
Posts: 194
Re: Advantages of 4 Link Rear vs. Leafs?

lol, not a fan of nascar. turning on banks don't count.
__________________
83 FULLSIZE Bronco - 357W Comp Extreme 4x4 cam. Edelbrock Performer Intake and 600cfm Toilet Bowl.
83broncodude is offline   Reply With Quote Quick reply to this message
Old 02-07-2009, 04:35 PM   #12 (permalink)
Registered User
 
Join Date: May 2007
Location: Orting, Washington
Posts: 1,122
Re: Advantages of 4 Link Rear vs. Leafs?

Quote:
Originally Posted by 83broncodude View Post
lol, not a fan of nascar. turning on banks don't count.
Do road course's count?
McCutcheon4 is offline   Reply With Quote Quick reply to this message
Old 02-07-2009, 06:41 PM   #13 (permalink)
Registered User
 
Join Date: Aug 2008
Location: Colorado Springs, CO
Posts: 172
Re: Advantages of 4 Link Rear vs. Leafs?

My .02... you can spend A LOT of time and money setting up a four link, but if you don't tune it up just right, you would be better off with the leaf springs. Like someone else said, the Shelby under-ride traction make a world of difference on traction with a leaf spring rear end.
61Comet is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech Forum 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 email address for yourself.
Email Address:

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

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear leafs - what spring to use for good launch & good street manners slow-poke All Ford Techboard 10 02-07-2008 06:53 PM
why are the rear leafs angled inwards? smblktbolt Fairlane Pages 2 08-21-2006 12:08 PM
whats the advantages or dis advantages of advancing the chain pedal2themetal45 All Ford Techboard 2 09-30-2005 02:34 PM
Would I hook up better with 4 leafs than 5 leafs ?? SSM lift bars Y or N , Experts Help!!! KidPoboy All Ford Techboard 10 03-05-2005 03:41 PM
Rear Leafs Question 107543 All Ford Techboard 3 03-11-2002 12:51 AM


All times are GMT -7. The time now is 09:30 PM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.