Theres always more methods weve discussed in the past to give you results rather than relying on suspension geometry. This is a 4 link suspension with all 4 links running parallel to each other. Automotive suspension engineering faq engtips forums. Dec 06, 2019 with a normal 4 link, when you hit the brakes, the suspension geometry wants to lift the rear of the vehicle. With this calculator you will see how bump and droop can affect camber. One of the most common questions we get about suspension setup and tuning is how 4 link geometry affects the performance and handling of a vehicle. Finally get a handle on your instant centeric location, to help you hook up and go fast. The universal triangulated 4 link enables you to install a hightravel rear suspension using a minimum of components and custom fabrication. The kit are designed for steel housing rear ends, such as 8. 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.
No part of the program or code shall be reproduced for commercial use. In this article well cover what we consider to be the three most important elements. Jerry bickels 4link wizard professional version jerry bickel race cars, in cooperation with etc, inc. Vehicle travel is simulated by dragging the image with the mouse or with a scroll bar. If you want a worthwhile performance addon to your vehicle, look to performance online for quality 4 link suspension kits. Parallel 4 link rear suspension system how to build. At some point you will want to enter your own suspension geometry data or even just just view the current model in more detail. Once the lower crossmember and the triangulated frame mounts are in place and while the suspension is. This is an example of a typical 4 link setup in the rear of a rig. Helix suspension brakes and steering hexa3db36 sku. Autoware autoware inc front suspension geometry software. Double triangulated rear 4link suspension kit w links.
Our double triangulated 4 link rear suspension builders kit for those who want the best offroad performance. Helix 9240 trifive triangulated 4link kit with hardware. Of all of the systems, the most common youll see today is the equal length fourlink, probably followed by. Design of three and four link suspensions for off road use. In addition to all the geometry of designing a four link there is also the problem of what will actually fit on the vehicle you are building. We have figured out all the mounting points to optimize suspension geometry weight transfer, minimal rear steer and proper amount of antisquat for you, while. If you are on the market for a more indepth, customizable 4 link suspension calculator, you will likely need to purchase software. Ideal to make your rig a top notch rock crawler with awesome articulation. The instant centre of a ladder bar remains constant. Add a 4 link suspension kit to your car or truck to add performance and adjustability to your suspension. It is a 4 link designed expressly for prostreet use.
This configuration is common in general motors cars built in and around the 1980s as well as some ford. Racewise rwfront front suspension geometry software. Along with the movement of the chassis, the front link attachment points move, and the rear ones move correspondingly. We take a look at what it takes to properly set up a link type front suspension on an off road truck. Now you can get all the racewise chassis school material in an easytouse software program for your home computer. On this episode of rock rods tech jake burkey teaches us about the dos and donts of building a double triangulated 4 link suspension. Drive shaft plunge is more important to minimize in desert racing than in rock crawling because the suspension moves faster for long periods of time and this builds up a lot of heat in the.
Enter the dimensions of your 4 link system and it will automatically calculate wheelbase change, suspension cage index angle, and shock length throughout the suspension travel. Mar 03, 2014 by reading this book you will discover all the proven methods on. The 4 link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. 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. The rock slayer offroad 4link kits eliminate the panhard bar its a true 4link. Get a great rear suspension for your classic with this 194753 chevy pickup 12 ton truck and the 1954 chevy pickup 12 ton truck with slight installation frame modifications triangulated 4 bar rear suspension kit. This is a 4 link suspension with the two upper links angled in toward the differential. There is no comparison to any other 4 link software available. Pressing the edit button immediately switches to edit mode listing more details about the dimensions of the model and allowing you to alter the model by dragging any of the tether points. Download 4 link suspension calculator for free windows.
Our 4link kits set up your vehicle at stock ride height. The popularity of the 4link suspension is due primarily to its ability to let the race car turn freely in the middle of the corner without compromising forward bite. Complete graphs and reports are included, and several new. The angled upper links hold the axle in place side to side, so a panhard bar is not needed. It features adjustable pinion angle and improved handling over the 4link rear suspension. Chassis master software tim mcamis performance parts. The 4bar rear suspension kit is designed to be both userfriendly and fully adjustable at the same time. How to weldin a 4link rear suspension system onto any hot rod or custom chassis.
Dec 11, 2012 i would really run a parallel style 4 link with a panhard bar. When we decided to upgrade our suspension to a fourlink setup with qa1 doubleadjustable coilovers, we took it a step further than just welding on some brackets. Historically, threelink suspensions have not been common with oems. Installing a four link kit just got easy with this deluxe kit that includes the four link bars, brackets, upper shock mount, coilover shocks, and springs.
The 4link calculator lets you input, view, save, analyze and compare your 4link rear suspension geometry. When you do get a good suspension baseline on your car i imagine that the point of actual instant center will be either right above the ground, a few inches above, or it could even be buried several inches into the ground and behind your rear engine plate, probably. The suspension analyzer does a complete 3d suspension analysis, including bump steer, ackerman, caster gain, anti dive, tire scrub, camber gain and much more. Universal rear weldon triangulated 4 link suspension kit. The pinion angle can be fine adjusted using the lower link bars, see figure 5. Tci 4754 chevy pickup truck 4 link rear suspension kit. For windows 7, 8 and 10 with opengl see the faq for more details faq for more. We have figured out all the mounting points for proper geometry weight transfer, rear steer and minimal antisquat, etc. 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 old rule of thumb on length is to make them 75% the length of the lower link this keeps your suspension geometry more consistent through travel, but it also causes the pinion angle to aim downwards as the suspension droops. Speedway motors 4link suspension kits parts instock with sameday shipping.
Used by many of the best teams in drag racing, chassis master is easy to set up and input information. Please practice handwashing and social distancing, and check out our resources for adapting to these times. As you drag the mouse or the scroll bar, the car moves up and down in response. A 4link system separates the functions of positioning the axle and supporting the vehicle. When the upper bars are reversed, this dynamic is eliminated or even reversed when you hit the brakes the suspension actually unloads the tires.
For street usage, both upper and lower links are parallel with each other, and are also parallel to the ground. Although it took a little bit of backandforth shipping to complete the build, this project highlights what moser engineering can do for your custom build by putting together a. It is simplicity itself and a great place to start learning about suspension geometry. This is the only way a 4 link should be used on the street. Links may be made to the site, but the product may not be redistributed in any way other than by direct download from.
Jan 02, 2018 information about triangulated verse parallel 4 link shirts and hats available at. Choose from jegs, competition engineering and other high strength 4 link suspension kits or. Four 3 4 zinc plated steel rod ends w urethane bushings. With frame leveled side to side and sitting at the rake if any front to rear that it will be finished, locate rear axle centerline and mark on frame rail sides. The classic version of the suspension geometry calculator. Upper lateral link, lower reversed aarm, twin trailing links rear the classis 60s sports and racing car rear suspension. This kind of suspension always has some kind of panhard bar to keep the axle centered. Rear four link kits rear suspension suspension parts. Chris short bars create a lot more rollsteer and antisquat. How to install rear 4link suspension for air ride and. For windows 7, 8 and 10 with opengl see the faq for more details faq for more details.
Performance trends offers a few different options, including a free trial. This is extremely important in order to maintain proper suspension geometry. Universal rear weldon parallel 4 link suspension kits. 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. In this video, a ridetech 4link kit is adapted to a 1948 ford pickup truck, but the process is very similar for most applications. Jul 19, 2004 well, ive seen some lift kits that claim to have a fully triangulated suspension geometry.
These kits are not designed for dana style rear ends that have cast housings. Over the years, drag racers with door cars have gone through all sorts of suspension arrangements. Instant centers, long, short, high and low various approaches have given different results and with so much attention being given to the intersection point, the location of the bars is rarely mentioned. 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. Speedway motors 4link suspension kits speedway motors. This allows the user to adjust the pinion angle and set up without unbolting the link bars. Chris alstons chassisworks, inc chassisworks weldin. It has a simple 5 link suspension model, so ive given it an a, but that is probably an overestimate of the usefulness of that part of the package.
Four heavy duty dom steel bars with smooth gloss black powder coat finish. Stateoftheart 4link suspension kits we offer on our website are the superior alternative to the inherent performance limitations of your leaf springs. Chevy corvette 1953 1962 heavy duty triangulated 4link kit helix triangulated full size four link kits designed specifically foruse in your chevy corvette 195. Take a look at performance trends calculators here. Front suspension technology link basics part 2 offroad. Jun 10, 2009 in addition to the high speed handling issues that can be caused by too much roll steer, the link geometry also determines the amount of drive shaft plunge. Ford and 8 34 chrysler rear ends, where steel brackets can be welded to a steel housing. This program is provided free of charge for personal use in the assisting of suspension calculations.
Install a coilover shock crossmember per its instructions, and install coilovers onto the crossmember and axle housing brackets using a coilover hardware kit. Double triangulated 4 link crossmember kit genright jeep parts. Chris alstons chassisworks, inc chassisworks pro 4link. Nov 23, 2010 if it were me, id copy the geometry from a 7888 gbody, they are everywhere and perform well on the street, circle track, and drag strip. To understand how a 4link can be made to provide such handling, you must first understand a few basics about rear suspensions. Education software downloads 4 link calculator by performance trends inc and many more programs are available for instant and free download. Upper lateral link, lower parallel links, twin trailing link rear a variation of the reversed lower aarm style. For most truck owners an allaround four link is the desire, but that will not necessarily be the best rockcrawler, desert jumper, and mud bogger suspension. Rear triangulated 4 bar bushings and geometry the h. Part 1 rear end alignment part 2 pinion angle part 3 preload part 4 antiroll bar part 5 ride height part. Calculates all possible instant center locations plus percentage of rise and squat. In addition to all the geometry of designing a fourlink there is also the problem of what will actually fit. The metric fourlink suspension design is a bit different than most other rear suspensions. The popularity of the 4 link suspension is due primarily to its ability to let the race car turn freely in the middle of the corner without compromising forward bite.
They claim that by fully triangulating the suspension, track bars are no longer necessary to keep the vehicle stable in turns. Previously i had begun this on another board and it got too large. To understand how a 4 link can be made to provide such handling, you must first understand a few basics about rear suspensions. Installation instructions 1932 ford rear triangulated 4link. If you are running coilovers and have the room they can be mounted vertically outside of the rails as well. Lower lateral link, upper reversed aarm, twin trailing links rear a variation on the above. A newer style that works well as an allaround type of suspension and also does great on the track.
We also offer a several 3 link suspension kit options. Rear suspension guide tech, terminology popular hot. Coilover parallel 4 link kit wshocks, upper crossmember 337mm shocks 250300lb. Position rear end housing in place with 4 of clearance between top of axle tubes and bottom. Racewise provides the technical understanding of suspension and tire performance that racers must have in order to make no guesswork decisions. Design of three and four link suspensions for off road use benjamin davis union college schenectady, ny. Universal weldon triangulated 4 link suspension kit. With a normal 4 link, when you hit the brakes, the suspension geometry wants to lift the rear of the vehicle. Once the geometry has been set up, the paper will discuss how to measure the.
For most truck owners an allaround fourlink is the desire, but that will not necessarily be the best rockcrawler, desert jumper, and mud bogger suspension. Lower bars mount just as described above, either directly under the frame rail or outside of it. The 3link is our raceproven, and streetable upgraded solidaxle rear suspension. Competition engineering c2017 standard series 4link kit. Typical rear suspension screen, here analyzing an angled 4 link rear suspension and driveshaft movement and u joint angles. All rock slayer offroad 4link kits are authentic double triangulated 4link front and rear kits. Not sure which suspension kit is the best fit for you. If youre willing to try the asymmetrical 4 link setup, please report your results back to us. The instant centre is the point about which the rear end pivots as it moves up and down with the suspension.
Just be extra sure that the bars are near parallel to the ground at half travel and dont try to squeeze more travel than necessary out of it. Metric fourlink suspension design circle track magazine. The threelink setup another suspension type common on the racetrack but not seen very much on street cars, is the threelink. Build your own 4 link suspension system with our shock brackets, tabs, and towers, coil spring bucket parts, 4 link dom kit, and our full line of enduro joints, heims and hardware. Installation instructions 19551957 chevy triangulated 4link. Tci parabolic 5559 chevy pickup truck 4 lowering rear leaf kit. This precision engineered kit includes bolton frame brackets, weldon axle brackets, tubular steel bars, and chromoly adjusters with urethane bushings. Track all chassis information including corner weights and center of gravity. Susprog3d is the premier kinematic suspension design and analysis tool. Our allnew 4 link suspension simulation software is an amazing new setup tool for your program. This is not a race 4 link with urethane bushings only. This is the genright off road design double triangulated 4 link cross member only kit for a jeep tj or yj. The angled upper links provide lateral support for the rearend housing, eliminating the need for an additional panhard bar or watts link system.