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Author Topic:   swingarm/3 link
ronwil19
Member
posted January 25, 2001 11:34 AM
Looking for advice on what angles i need my swingarms mounted at. Heard some bad things about swingarms lately, so if anyone also had info about how to setup a 3-link too. angles, width of mounts...etc. Thanks in advance.


CUSTOMPERFORMANCE
Member
posted January 25, 2001 01:36 PM
i converted a 3 link car over to swingarms last summer. get the afco 2 holed swingarms and use the mounting hole for the slider furthest from housing, for clearence. start out with them in the same holes in the frame mounts, but you will probably end up running more anfgle in them than you would with the regular 2 link bars. other than that you set them at the same length as the regular bars and just make the mounts on the frame for the slider and shock to mount up. thats about it.
the only benifit i found running them was the car was freer getting in the corner and through but i lost some forward bite and side bite with them. the other benifit is it is a smooth suspension when running in the corners on a rough track. more controllable. keep in mind i changed my car over to them late in the year and only ran them about 6-8 nites before the end of season. if i had run them all year i am sure i woould have got the side and forward bite back through fine tuning the whole package.


CUSTOMPERFORMANCE
Member
posted January 25, 2001 01:39 PM
also with the springs mounted ahead of the axle on the swing arms the best starting point for your springs is about 50lbs heavier than what you ran wth the regular 3 link.


WPP
Member
posted January 25, 2001 03:38 PM
What spring rate should you run on a 23 degree banking on a 3/8 track with a car that weights 2400 pds with a swingarm.


CUSTOMPERFORMANCE
Member
posted January 26, 2001 12:08 AM
the car i put the 2 link swingarms on i ran a 275 lb lr spring and a 250 or 275 rr spring


WPP
Member
posted January 26, 2001 12:56 AM
Would that be the same as the upper control arms running to the rear i notice that you was talking about a 2-link swingarm. I always wondered if there was a big differce in the two suspenions


CUSTOMPERFORMANCE
Member
posted January 26, 2001 01:15 AM
i am going to clear this whole thing up.
a 2 link setup uses 2 brackets attached to the rearend housing, the springs mount to one side of axle and the shock to the other. you have a lower radius rod on each side, (2link) and with a upper link it is then called a 3 link (3links). with a torque arm for axle wrapup resistance it is called a 2 link with a torque arm.
the 2 link swing arm is taking your lower links off. use the lower swing arm with spring mount and mounting your spring on the lower swiing arm. you are taking the springs off the bracket attached to the rearend to get a little more axle wrapup like you would get with the tradditional swing arm car that has the lower swing arm bars forward and 2 bars running rearward. axle is free to float/rotate because of the birdcages


MOD RACER#93
Member
posted January 26, 2001 07:10 PM
The setup with the bars running rearward are usually called Z-link 'cause they make a Z if you look from the side. One benifit from running 3-link swing arm is you have same EFFECT as the Z-link, while keeping roll steer the same(as your original 3-link without swing arms). Basically Z-link cars are designed to eliminate roll steer, on dry slick tracks. You would use the same spring rates with either setup. Because springs are in front of the housing and will be holding more load they have to be stiffer...


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