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Author Topic:   4 link & Z link combo
wild thing
unregistered
posted January 11, 2000 07:44 AM           
I have heard that there may be an advantage to running this combination. Can anyone explain. Thanks


Sidebite
unregistered
posted January 12, 2000 06:22 AM           
Not to kill the thread here but, there is a discussion on this at the AFCO board under the heading "zlink lr / 4-link rr" with over 40 comments.

Maybe we can discuss that thread from here.

jammin
Administrator
posted January 12, 2000 07:37 AM
The basic scenario is that if you run a Z-link on the RR of the car, you can get more roll steer and make the car tighter off the turns. Thats the whole catch. You can't get the same amount of rear roll steer with a 4-link that you can on a z-link or a 3-link. Just not possible without a spring bar.

Hope this helps.

kingralph
unregistered
posted January 27, 2000 11:05 AM           
hey jammin know what the hell youre talking about before talk


jammin
Administrator
posted January 27, 2000 11:15 AM
Well, what would be your scenario king?


kingralph
unregistered
posted January 27, 2000 02:18 PM           
YOU ACTUALLY HAVE LESS LOOSE ROLLSTEER WITH THE FORE MENTIONED SUSPENSION COMBO.LOOSE ROLLSTEER OCCURS WHEN THE CHASSIS ROLLS THE WHEEL BASE CHANGES-- THE LEFT SIDE SHORTENS AND THE RIGHT SIDE LENGTHENS-- THIS IS TRUE WITH 4LINK. WITH 4LINK--ZLINK COMBO LOOSE ROLLSTEER IS SOMEWHAT ELIMINATED BECAUSE Z-LINK BASED THE MOUNTING POINTS OF BARS WHEEL BASE WILL NOT CHANGE UNDER CHASSIS ROLL.YOU WILL STILL HAVE CHASSIS ROLL YOU JUST ELIMINATE LOOSE ROLLSTEER THUS TIGHTENING THE CHASSIS.


jammin
Administrator
posted January 27, 2000 04:27 PM
King, your correct in what your saying, but your missing the boat. There is also a way to get positive roll steer to tight the car more when the chassis rolls, but, I know you already knew that. Your saying the same thing, but apparently you don't realized that there is an opposite of loose roll steer. Trailing arm geometry will actually change this. You can actually counter loose roll steer on a 4-Link by using the spring rod on the upper RR link, and this will help counter under roll. But I know you knew that too. You also know that there are differences in bird cages and solid mounts, shorter and longer trailing arms, pinion rotation when raise, and many more things you can do to counter it. But I know you know that.


kingralph
unregistered
posted January 27, 2000 04:47 PM           
hey i was just explaining in my opinion way 4link-zlink combo handles tighter than a regular straight 4link on birdcages. oh by the the positive rollsteer youre talking is tight rollsteer or when the left wheel base shortens and right shortens more than left (springrod) or simply does not change like in the 4link-zlink combo thats what youre trying to say i think. i realize with a 4link there is many ways to counteract loose rollsteer--you elaborated on some of them. jammin thanks for your reply


jammin
Administrator
posted January 27, 2000 04:51 PM
I hope this helps. There are many ways to do it with basically every type of suspension out there, its just some of them give you more than others, this is where you need to be very selective with what you run.


kingralph
unregistered
posted January 27, 2000 07:16 PM           
hey,jammin youre right on the money


QUICKCHANGE
unregistered
posted January 27, 2000 10:05 PM           
Seems to me that a Z will allow a driver to raise his right side bottom bar to get more forward bite while keeping the amount of loose roll steer the same. Maybe?

Just a thought.....

a2ky2k88
unregistered
posted January 28, 2000 06:56 PM           
IM THINKING OF BUYING A 4 LINK. IM USED TO RUNNING A 2 LINK. WHAT IS THE PROS AND CONS COMPARING A 2 TO A 4 LINK?? ANY HELP WOULD BE APPRECIATED BEFORE I BUY THIS CAR>>


95FAST
Member
posted January 28, 2000 07:38 PM
I think the advantage to this set-up is that it gives you more options on your set-up period.a swing arm car is good when it is rough and tacky,4-bar isn't.but with the option of 4-bar and swing-arm or 4-bar and z-link you have the best of both.up until this year we had always ran rayburn's and when it got glazed or dry slick you go backwards.
just bought new rayburn direct from goddard performance in tenn. This car has all the options 4-bar z-link swing arm etc. looking forward to running against those GRT'S and
Warriors, mastersbilt and all that other junk

FAST 95

a2ky2k88
unregistered
posted January 28, 2000 09:47 PM           
most of the time the track is dry slick. would a 4 link have an advantage over a 2 link, if so, why?? i run a mod with a biscuit rod on top


Bart
unregistered
posted January 31, 2000 05:58 PM           
RE: z link/4 bar combo - you all talk like the z link is on the right side, but what if the z link is on the left and the 4 bar type set up is on the right? Any advantage to this? Can you also explain indexing? I know it is on the AFCO bulletin board, but need a simply description for this simple country boy. Thank you.


a2ky2k88
unregistered
posted February 01, 2000 12:11 AM           
how do you get to the afco board??


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