First time 4 link setup? - Yellow Bullet Forums

Go Back   Yellow Bullet Forums > Technical Section > Chassis and Suspension - Tim McAmis Performance Parts

Chassis and Suspension - Tim McAmis Performance Parts

Reply
 
Thread Tools Display Modes
Old 05-08-2009, 10:38 PM   #1
jerryl
Junior Member
Spooled up
 
Join Date: Aug 2008
Location: wisconsin
Posts: 189
Default First time 4 link setup?

I've have no experience setting up a 4link car.Heres what i'm working on.65 chevy II,SBC 610hp,turbo 350 with a brake,456 gear,31'' tires,no idea what it weighs,Hoping for mid 10s. If I measured right the intersect point is about 51" out. Im not sure how to measure how high up.I'm also confused on setting the pinion angle.I don't have a drive shaft yet so i measured the angle at the balancer. It's 3 degrees down so the pinion should be 2 degrees up?
[IMG]http://i122.photobucket.com/albums/o252/jdss4/IMG_3986.jpg
jerryl is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-08-2009, 10:40 PM   #2
jerryl
Junior Member
Spooled up
 
Join Date: Aug 2008
Location: wisconsin
Posts: 189
Default Re: First time 4 link setup?

hope this works

jerryl is offline   Reply With Quote
Old 05-08-2009, 10:46 PM   #3
MattG
Senior Member
Smoked another BBC
 
MattG's Avatar
 
Join Date: Dec 2005
Location: Burlington, ON
Posts: 2,137
Default Re: First time 4 link setup?

Invest in some 4link software. I have always used 4link wizard and it works great. You give it a bunch of measurements and it shows you all your available instant centres and how to set the bars.
__________________
2000 Firebird - OSCA EZ Street - SB2/F2 Procharger - #1329 - 7.56 @ 193mph @ 3430lbs
1972 Nova - OSCA Pro Stock - NA Conventional-BBC - #1329 - 8.31 @ 165mph @ 3300lbs

- BES Racing Engines - Hutch Transmissions - PTP Performance - Procharger - Bears Performance
MattG is offline   Reply With Quote
Old 05-08-2009, 11:58 PM   #4
race9899
Senior Member
Smoked Another SBC
 
race9899's Avatar
 
Join Date: Feb 2006
Posts: 4,515
Default Re: First time 4 link setup?

Here is a quick set up if you can get the bars to it...

Lower bar level..
Front upper bar in a hole 6.5" to 7" above lower
Rear upper 11" to 12" above lower...

If your Lower 4 link bar is 6" up and you use 12" and 7" as your spreads that will be approximately 53 inches out and 6" up


With the lower bar level you intersect height will be whatever the height of the bar is...

If you are going to use your car as a driver, you make the pinion angle match the engine transmission angle..

If you are going to be racing it, you will need a Drive shaft and will set the pinion to give 2-3 degrees of Pinion Nose Down angle..
If the Driveshaft is level then you will point the pinion down 2-3 Degrees.. If the Driveshaft runs down to the rearend 1 degree you will point the pinion down 1-2 degrees..
__________________

www.makotenfive.com
_________________________________________________
Holloway Race Cars
Broken Arrow Oklahoma
race9899 is offline   Reply With Quote
Old 05-09-2009, 11:29 AM   #5
Techguy
Junior Member
Pre-Staged
 
Techguy's Avatar
 
Join Date: Oct 2008
Location: Auburn, CA
Posts: 89
Default Re: First time 4 link setup?

Quote:
Originally Posted by jerryl View Post
hope this works

from your above settings, & what you described.. I'd go a little
shorter & higher... raise the front bottom hole 1 & see how it likes that..
__________________
Mike Weddle
Senior Sales Technician
Chris Alston's Chassisworks
800-722-2269 xt 221
www.cachassisworks.com
Techguy is offline   Reply With Quote
Old 05-09-2009, 05:26 PM   #6
BillyShope
Member
Pullin gears
 
BillyShope's Avatar
 
Join Date: Jul 2007
Posts: 597
Default Re: First time 4 link setup?

It lacks the pretty pictures of the purchased software, but Page 13 of my site provides the IC location and percent antisquat and it's free.
http://home.earthlink.net/~whshope
over 150,000 page views
BillyShope is offline   Reply With Quote
Old 05-10-2009, 09:58 AM   #7
jerryl
Junior Member
Spooled up
 
Join Date: Aug 2008
Location: wisconsin
Posts: 189
Default Re: First time 4 link setup?

Thanks for the link Bill.Looks like it would work great if I could figure out were to measure from.

"The horizontal and vertical dimensions are related to the rear tire patch."


What??
jerryl is offline   Reply With Quote
Old 05-10-2009, 04:50 PM   #8
BillyShope
Member
Pullin gears
 
BillyShope's Avatar
 
Join Date: Jul 2007
Posts: 597
Default Re: First time 4 link setup?

Quote:
Originally Posted by jerryl View Post
Thanks for the link Bill.Looks like it would work great if I could figure out were to measure from.

"The horizontal and vertical dimensions are related to the rear tire patch."


What??
I've had quite a few ask the same question. Vertical distance is from the shop floor. Horizontal distance is from the rear axle centerline.

Or, in the jargon of an engineer, the origin of the coordinate system is located at the rear tire patch.

I guess I'll have to go in and clarify. In fact, I'll go and do it as soon as I post this.
http://home.earthlink.net/~whshop
over 150,000 page views
BillyShope is offline   Reply With Quote
Old 05-10-2009, 04:58 PM   #9
BillyShope
Member
Pullin gears
 
BillyShope's Avatar
 
Join Date: Jul 2007
Posts: 597
Default Re: First time 4 link setup?

Quote:
Originally Posted by jerryl View Post
What??
It's been fixed.
http://home.earthlink.net/~whshope
over 150,000 page views
BillyShope is offline   Reply With Quote
Old 05-10-2009, 06:20 PM   #10
jerryl
Junior Member
Spooled up
 
Join Date: Aug 2008
Location: wisconsin
Posts: 189
Default Re: First time 4 link setup?

Thanks for explaining that.I get it now.Now if I could figure out my center of gravity.
jerryl is offline   Reply With Quote
Old 05-10-2009, 06:25 PM   #11
jerryl
Junior Member
Spooled up
 
Join Date: Aug 2008
Location: wisconsin
Posts: 189
Default Re: First time 4 link setup?

oops ,I just saw the answer to my last question is on page 31.
Thanks Bill.
jerryl is offline   Reply With Quote
Old 05-10-2009, 07:28 PM   #12
BillyShope
Member
Pullin gears
 
BillyShope's Avatar
 
Join Date: Jul 2007
Posts: 597
Default Re: First time 4 link setup?

Quote:
Originally Posted by jerryl View Post
Now if I could figure out my center of gravity.
As you play with the spreadsheet, you'll see that the CG height estimate can be a bit off and the results don't change all that much. Just make a reasonable estimate.
http://home.earthlink.net/~whshope
over 150,000 page views
BillyShope is offline   Reply With Quote
Old 06-22-2009, 08:21 PM   #13
Bob13200
Junior Member
Burnout box
 
Join Date: Mar 2009
Posts: 4
Default Re: First time 4 link setup?

There appears to be a multitude of settings that will achieve the same IC, so when starting out which would be the preferred locations to use in the axle brackets. Does it even matter?
Bob13200 is offline   Reply With Quote
Old 06-22-2009, 09:01 PM   #14
BillyShope
Member
Pullin gears
 
BillyShope's Avatar
 
Join Date: Jul 2007
Posts: 597
Default Re: First time 4 link setup?

Quote:
Originally Posted by Bob13200 View Post
There appears to be a multitude of settings that will achieve the same IC, so when starting out which would be the preferred locations to use in the axle brackets. Does it even matter?
One thing to remember: The greater the spread (vertical distance) between the upper and lower link, the lighter the loads to be carried by the links, Heims, etc.
http://www.racetec.cc/shope
BillyShope is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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



All times are GMT -4. The time now is 07:37 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Resources saved on this page: MySQL 2.86%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Yellow Bullet LLC