Upper and lower virtual aarms, steering link front upper and lower virtual aarms, toe link rear as used on some mercedes rear. Rear suspension design three link four link two link. The shorter upper bars change angle more rapidly than the longer lower bars, so there is an angle between their respective planes, which defines an instant center that gradually moves from infinity ahead of the car to somewhere in the middle of the car, as the rear drops. Increase right rear trail lengthen right side 4 link rods 2 turns at a time lower center of gravity height lower ballast, left side ride heights category. A stickbystick build of a true longtravel prerunner rear. Open config and change from swing axle lengths to suspension link chassis mounting points. I use this program almost daily, both in my design. You enter heights above the ground and distance ahead of the front axle for up to 6 holes for all 4 brackets for your car, or any number of cars.
These systems are commonly found on vehicles used for the. This rig, most often driven by my son, works pretty well with just the short arms. Figure 4 three link front left and four link rear right four link suspensions, 2007 the three link suspension in figure 4 three link front left and four link rear right uses three primary links shown in blue. Antipitch is the name given to a suspension geometry, front and rear that prevents pitch under braking. This is extremely important in order to maintain proper suspension geometry. Along with the movement of the chassis, the front link attachment points move, and the rear ones move correspondingly. The ambulance mode prevents the suspension from kneeling when the vehicle is in gear with a system enable signal. Of all of the systems, the most common youll see today is the equal length fourlink, probably followed by the ladder bar. Each mount is built at a neutral angle to keep the suspension joints in a position so they do not waste any of the joints rotation and cause damage to the joint in those crazy articulation spots on the trail. A variation on the radius arm suspension is the parallel fourlink, shown in the figure above. Fourlink kits create a definitive center for a rear suspension, and are commonly used with a panhard or track bar to improve vehicle handling because it lowers your offroad vehicles center of gravity. I hadnt thought of the high track bar helping the side hill capability with the high roll center but that would make sense. Most of our 4links are sold in complete rear suspension packages.
Just a quick question for those of you in the know. Add a 4 link suspension kit to your car or truck to add performance and adjustability to your suspension. Figure 4 three link front left and four link rear right fourlink suspensions, 2007 the three link suspension in figure 4 three link front left and four link rear right uses three primary links shown in blue. A popular choice for both front and rear suspension systems, our topoftherange 4link kits allow for perfectly balanced triangulation, providing great handling and traction. Chassis master is easy to set up and calculates all possible ic locations, rise, squat, corner weights, center of gravity and even automatically adjust to changes in ride height or tire size. Easily monitor proper ride height and lift with the userfriendly diagnostic software. The 4link calculator lets you input, view, save, analyze and compare your 4link rear suspension geometry. I have not modeled a 4link suspension with fusion360 as i rarely use. Autoware autoware inc rear suspension geometry software. Once the lower crossmember and the triangulated frame mounts are in place and while the suspension is. We are designing the front suspension, and will input data for the lh side.
Many people do not take this into any consideration with 4 link or ladder bars or 3 link suspension. There is no comparison to any other 4 link software available. It will utilize a solo xlt 19inch travel kit and a series of support tubes will connect the front end to the. Aftermarket manufacturers make kits that retrofit an existing radius arm suspension to a parallel four link design and use coil springs and a track bar to center the axle. There is no comparison to any other 4link software available. A stickbystick build of a true longtravel prerunner. Upper lateral link, lower reversed aarm, twin trailing links rear the classis 60s sports and racing car rear suspension. The traditional way the 4 link is setup on off road rigs is to have 2 links holding the axle from moving front to back and 2 links mounted in a triangle shape, used to locate the axle from side to side. As you drag the mouse or the scroll bar, the car moves up and down in response.
As before, this produces greatly increased jacking, and most designers would find this too disadvantageous. Lower lateral link, upper reversed aarm, twin trailing links rear a variation on. One of the most common questions we get about suspension setup and tuning is how 4link geometry affects the performance and handling of a vehicle. Fourlink kits create a definitive center for a rear suspension, and are commonly used with a.
This winter, on the 12 jk, we will put ylink long arms on the front, but keep the 4link rear. Lift bars, slapper bars, super stock springs, leaf links, ladder bars, threelinks, fourlinks, and torque arms there may be others too, but its a start. The 4 link wizard helps you determine the ic choices available with your fourlink bars so you can home in on the sweet spot and reap the benefits of a fourlink suspension. Aug 06, 20 calculate the 4 link setup in any car, with any brackets in less than 15 minutes with this easy to use quartermax universal 4 link plotter. The flatter the top bar, the easier it is to use its pull on the chassis to plant the tire. Rear suspension analysis tuning all types with heavy emphasis on 4link, zlink and swing arm types. If your car wheel stands too much, you can angle the 4 link bars closer together at the front to move the instant center closer to the rear of the car. Ultraride is a total conversion suspension that replaces a standard leaf spring suspension system. Links may be made to the site, but the product may not be redistributed in any way other than by direct download from. Unlike ladder bars, a fourlink rear suspension provides many chassis adjustment choices, resulting in numerous possible instant centers. Calculate the 4link setup in any car, with any brackets in less than 15 minutes with this easy to use quartermax universal 4 link plotter.
Vehicle travel is simulated by dragging the image with the mouse or with a scroll bar. To do this you will need some kind of angle finder, either digital or a. Apr 01, 2008 on any rear suspension system assuming it is a fullforward system, even a two link, moving the ic higher will produce a higher percentage of antisquat, making the truck not squat as much during. Parallel 4 link rear suspension system how to build. Quickly and easily see the affect movement has on your suspension setup and adjust on the fly using the drag and drop editor. Roll steer, drive angles, birdcage indexing effects, trailing arm toe, panhard devices, lift and pull bars, 6th coils, damper shocks, stacked, 2 step and double spring arrangements, 5th coils and shocks, leaf springs, tall vs. I have a collection of 4link articles from various sources but most of them are for trail trucks or rock crawlers so i was wondering what would be the major difference in geometry from one these rigs that are mostly concerned with maximizing articulation and a desert truck that has long travel at high speeds.
Kit can be used with johnny joints or the big 16 fk heims. Four link kits create a definitive center for a rear suspension, and are commonly used with a. If your car wheel stands too much, you can angle the 4 link bars closer together at the. In this article well cover what we consider to be the three most important elements.
Introducing the 4link wizard software for microsoft windows 95, 98, me, xp, 2000 or nt. Apr 23, 2015 because the respective brackets found on something like a four link are under load during acceleration and braking, they must be stout. The 4 link solid axle rear suspension design incorporates a solid drive axle and coil springs, with two parallel links per side for fronttorear positioning of the axle. It works especially well under hard acceleration at the drags or hard cornering at the track. This is an example of a typical 4 link setup in the rear of a rig. Simply take 8 easy measurements with a tape measure and. There is no comparison to any other 4 link software. I finally put the car on a 4 post and got measurements of every adjustment hole and just plotted all the intersect lines on my cad software that way i. Performance trends offers a few different options, including a free trial. Take a look at performance trends calculators here. Chassis master software tim mcamis performance parts. The angled upper links provide lateral support for the rearend housing, eliminating the need for an additional panhard bar or watts link system. No part of the program or code shall be reproduced for commercial use.
The suspension analyzer does a complete 3d suspension analysis, including bump steer, ackerman, caster gain, anti dive, tire scrub, camber gain and much more. The angle of the top bar is the final ingredient to determining how much bite the tire will have, and for how long. Another of my rigs is being built with a dual triangulated 4 link. James balkwill, in performance vehicle dynamics, 2018. A variation on the radius arm suspension is the parallel four link, shown in the figure above. Apr 30, 2009 suspension geometry part 2 roll center. Calculates ics for your brackets, regardless of manufacturer. A fullyadjustable 4 link suspension allows you to move the instant center not only up or down, but also forward or back by increasing or decreasing the angle between the bars. This thesis outlines the process of designing a three link front, and four link rear suspension system.
Check out tuning 4 link rear suspensions for the drag strip. Jerry bickels 4link wizard professional version jerry bickel race cars, in cooperation with etc, inc. Design of a rear suspension configuration for a live. The 4link wizard helps you determine the ic choices available with your fourlink bars so you can home in on the sweet spot and reap the benefits of a fourlink suspension. Design of three and four link suspensions for off road use. When the race car accelerates, the rear end wraps up, placing the upper bars in tension while the lower bars are held in compression. Suspension geometry an overview sciencedirect topics. The parallel 4 link is designed to keep the rear axle centered, and to keep the pinion angle from changing keep the axle from rotating. The 4 link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. You can also use this function to compare front and rear suspension although be careful as only the model at the front of the drawing is saved within the url. Oct 26, 2017 the shorter upper bars change angle more rapidly than the longer lower bars, so there is an angle between their respective planes, which defines an instant center that gradually moves from infinity ahead of the car to somewhere in the middle of the car, as the rear drops.
Tci 4754 chevy pickup truck 4 link rear suspension kit. There is no comparison to any other 4link software. Transferring all of that engine torque to the rear wheels requires a good rear suspension system to handle it. The universal triangulated 4link enables you to install a hightravel rear suspension using a minimum of components and custom fabrication. Crafted from the highestgrade components and offered at competitive prices, our products guarantee the. They include the 4link with frame and housing brackets, coilover rear shocks with springs ratematched to your application and a choice of a panhard bar for street use or diagonal link race. A 4 link suspension system is commonly used to replace leaf springs and shocks in vehicles to provide much greater stability while cornering, greater tire contact and traction for drag racers, and reduces body roll in lifted offroad trucks and suvs. Jul 19, 2004 the reason it work is that the offset location of the upper link causes the rear tires to be loaded equally while climping instead of having the right rear squat and left front lift like a triangulated 4 link would do. The 4links arms run parallel forward from the axle housing, longitudinally along the framerails, mounting to pivot points on the frame. Choose from jegs, competition engineering and other high strength 4 link suspension kits or replacement parts. A popular choice for rear suspension systems and gaining in popularity as a choice for front suspensions, our 4 link suspension kits allow for perfectly balanced triangulation, providing maximum control even at high speeds.
This kind of suspension always has some kind of panhard bar to keep the axle centered. Download 4 link suspension calculator for free windows. Will this tell me what changes to my midsize metric rear suspension will do. Suspension types include trailing arms which includes 3 links and truck arms with coil springs, torsion bars, jacobs ladder and panhard bars, leaf springs, and various 4 links like metric, chevelle and late model mustangs. Computer program to simulate and analyze rear suspension 4link setups for. A newer style that works well as an allaround type of suspension and also does great on the track. Helpful suspension geometry calculators barnes 4wd. The 4link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. This program is provided free of charge for personal use in the assisting of suspension calculations. Rear suspension screen lets you describe 8 different types of rear suspensions. If you press this button in edit mode its easy to compare the setup values of each model.
Figure 4 three link front left and four link rear rightshows a three link and four link system. Roll steer, drive angles, birdcage indexing effects, trailing arm toe, panhard devices, lift and pull bars, 6th coils, damper shocks, stacked, 2 step and double spring. Discussion in the hokey ass message board started by blue one. If you are on the market for a more indepth, customizable 4 link suspension calculator, you will likely need to purchase software. This involves placing the force application points g and h on the centre of gravity. These unwanted characteristics are caused by incorrect 4link geometry and they.
The towerhauler mode ignores the input and allows the vehicle to kneel even if the vehicle is moving. On any rear suspension system assuming it is a fullforward system, even a twolink, moving the ic higher will produce a higher percentage of antisquat, making the truck not squat as. Tci parabolic 5559 chevy pickup truck 4 lowering rear leaf kit. The only aftermarket link type suspension that i have come across that does not bind is a threelink using spericalheim. Installation instructions 19551957 chevy triangulated 4. Actual linkbars finish color is texturedblack powder coat. Antisquat in a linked suspension system determines how the rear end of a. With the back half being done, work to the front suspension system will now begin.
Universal weldon rear triangulated 4link suspension kits for offroad. Aftermarket manufacturers make kits that retrofit an existing radius arm suspension to a parallel fourlink design and use coil springs and a track bar to center the axle. Universal weldon triangulated rear 4 link suspension kits for truck suv with two 2500 air bags and rear air bag mounts. Covers conventional 3 link and 4 link suspensions allows bird cages on one or both. Over the years, drag racers with door cars have gone through all sorts of suspension arrangements.
Calculates all possible instant center locations plus percentage of rise and squat. Typical rear suspension screen, here analyzing an angled 4 link rear suspension and driveshaft movement and u joint angles. This is a 4 link suspension with all 4 links running parallel to each other. This winter, on the 12 jk, we will put y link long arms on the front, but keep the 4 link rear. Notice that the chassis input has updated, and now the y values can be input. A typical 4 link will have the rear attaching point of the top bar a few inches above the axle center but will have the attaching point of the bottom bar several more inches below the axle center. Chris alstons chassisworks, inc chassisworks weldin. Track all chassis information including corner weights and center of gravity. All these measurements are saved in the library for retrieval, analysis or modification in the future. Crafted from the highestgrade components and offered at competitive prices, our products guarantee the level of quality youve been looking for. It makes sense, since this is the bar that also dictates the ic once the rest of the parameters are set. Most of our 4 links are sold in complete rear suspension packages.
Performance trends 4 link calculator demo movie saving and. Used by many of the best teams in drag racing, chassis master is easy to set up and input information. Looking at various rear suspension configurations, design a rear suspension. Rear triangulated 4 bar bushings and geometry the h. It makes sense, since this is the bar that also dictates the ic once the rest of the parameters are set flatter is longer, and longer. A 4link suspension system is commonly used to replace leaf springs and shocks in vehicles to provide much greater stability while cornering, greater tire contact and traction for drag racers, and reduces body roll in lifted offroad trucks and suvs. The driveshaft will be on a slight angle downwards in relation to the yoke in the rearend.