This is an example of a typical 4 link setup in the rear of a rig. Sep 15, 2016 the end goal needs to be established before starting a project like this. This is a 4 link suspension with all 4 links running parallel to each other. A ladder bar or 4 link setup is much more rigid and therefore usually only needs degrees. This setup if the easiest for people to understand and wrap their heads around the concept of. Mar 01, 2007 an indepth technical look at four link truck suspensions from design to a full suspension installation 4 wheel and offroad magazine.
Along with the movement of the chassis, the front link attachment points move, and the rear ones move correspondingly. When the upper bars are reversed, this dynamic is eliminated or even reversed when you hit the brakes the suspension actually unloads the tires. 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. Our 4link kits set up your vehicle at stock ride height. A good suspension system is key in any type of automobile, but especially in offroad applications. Upper lateral link, lower reversed aarm, twin trailing links rear the classis 60s sports and racing car rear suspension. Lower lateral link, upper reversed aarm, twin trailing links rear a variation on.
This document, the associated hardware, software, drawings, and other material. Whether taking a vehicle through a slow crawl over rocks where wheel travel and articulation is very important, or through the whoops which was our case with project storm trooper. David hodgson this thesis outlines the process of designing a three link front, and four link rear suspension system. 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. You never want the rearend setup with positive pinion angle. Competition engineering standard series 4 link kits provide rear suspensions that will give you the freedom to make incremental changes in your cars point of instant center the adjustable point that determines weight transfer, for headsnapping launches. The 4 link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. Links may be made to the site, but the product may not be redistributed in any way other than by direct download from. The 4 link parallelogram in stock jeep suspensions tries to twist the axle when articulated, but the amount is small enough that the bushings absorb it and you still get great flex. As you drag the mouse or the scroll bar, the car moves up and down in response. It was designed for 4x4 offroad linkages, but will work just fine for a street car too. Ultraride is a total conversion suspension that replaces a standard leaf spring suspension system. It will utilize a solo xlt 19inch travel kit and a series of support tubes will connect the front end to.
Competition engineering standard series 4link kits c2017. 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. Vehicle travel is simulated by dragging the image with the mouse or with a scroll bar. Covers conventional 3 link and 4 link suspensions allows bird cages on one or both. A stickbystick build of a true longtravel prerunner. Drag cars usually want 100% or more, but too much causes tire shake and brake hop. It tends to not soak up the wall hits and throws the back end back down to the ground. 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. 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.
Discussion in the hokey ass message board started by blue one. 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. Suspension geometry part 1 camber, toe, caster, kpi, scrub. A newer style that works well as an allaround type of suspension and also does great on the track. Design of three and four link suspensions for off road use benjamin davis union college schenectady, ny. Looking at various rear suspension configurations, design a rear suspension. Each can be used with our vehiclespecific boltin fab9 housing or the vehicles existing housing. The calculations vary from motion ratios, to spring stiffness, to wheel loads. Design of three and four link suspensions for off road use. With the back half being done, work to the front suspension system will now begin.
The 4 link calculator allows you to design, cost, and order complete linkages of multiple different styles, length, sizes and configurations. Competition engineering standard series 4link kits provide rear suspensions that will give you the freedom to make incremental changes in your cars point of instant center the adjustable point that determines weight transfer, for headsnapping launches. A ladder bar or 4link setup is much more rigid and therefore usually only needs degrees. Upper and lower virtual aarms, steering link front upper and lower virtual aarms, toe link rear as used on some mercedes rear. There are many branches of 4x4 motorsports such as high speed desert racing, hill climbs, sand dune racing, and rock bouncing. 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. Jan 29, 2018 suspension geometry part 1 camber, toe, caster, kpi, scrub radius sk8215. If you are on the market for a more indepth, customizable 4 link suspension calculator, you will likely need to purchase software. The secret to the 4link kit is the geometry and how it eliminates binding because it has no pan hard bar. In addition to all the geometry of designing a fourlink there is also the problem of what will actually fit. We have taken out all the guess work and have figured out all the mounting points for proper geometry and weight transfer to make your vehicle a top of the line rockcrawler with awesome articulation and great high speed handling. Here is ridetechs universal triangulated 4link rear suspension system. Once the materials and the type of welding have been figured out the design of the suspension can begin. Parallel 4 link rear suspension system how to build.
Helix 608153 triangulated rear suspension four 4 link kit for 6769 camaro 6874 nova automotive complete 10piece 4x4 only front suspension kit includes upper control arms, lower ball joints, inner and outer tie rod ends, sway bar end links. Suspension 101 rock racing how to choose a custom suspension, building a double triangulated 4 link, plus rock racing from jellico, tn. This video will help you on build so you can get the right setup. Of all of the systems, the most common youll see today is the equal length fourlink, probably followed by. Where they intersect is called the instant center see illustration 4 below. This is the 4link kit from our legend suspension kit. We also offer a several 3 link suspension kit options. 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. In this installment of junkyard jewel, our chevy luv project, we get our fourlink installed, setup, and dial in. Davis, benjamin design of three and four link suspensions for off road motorsports. You can run a 20 travel shock with our 4 link kits.
The suspension calculator aims to help people who are building race cars perform suspension related calculations. The typical leaf spring rear suspension will need 57 degrees of negative angle. Autoware autoware inc rear suspension geometry software. 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.
Ive recently learned that the reason my buggy doesnt do steep verticals very well is because i have built too much antisquat into my rear suspension. Tci 4754 chevy pickup truck 4 link rear suspension kit. All rock slayer offroad 4 link kits are authentic double triangulated 4 link front and rear kits. How to choose a custom suspension, building a double triangulated 4 link, plus rock racing from jellico, tn. Give your jeep or truck exactly what it needs with industry leading products and expertise at. The 4links arms run parallel forward from the axle housing, longitudinally along the framerails, mounting to pivot points on the frame. Jun 10, 2009 i have a collection of 4 link 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. These systems are commonly found on vehicles used for the sport of rock. We will provide you with best prices on top name brands. 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.
In this article well cover what we consider to be the three most important elements. 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. Rso strongly recommends that all our products be installed by trained professionals. No part of the program or code shall be reproduced for commercial use. Rear triangulated 4 bar bushings and geometry the h. The air suspension provides increased operator and passenger comfort, ease of access and overall safety. Suspension geometry part 1 camber, toe, caster, kpi, scrub radius sk8215. Oct 14, 2015 suspension geometry software for purchase.
On this episode of rock rods tech jake burkey teaches us about the dos and donts of building a double triangulated 4 link suspension. I personally am a fan of a 3 link parallelogram style with a panhard bar, as you get very precise handling and great articulation. Space gets really tight at the front differential, and the. All rock slayer offroad 4link kits are authentic double triangulated 4link front and rear kits. Jerry bickels 4link wizard professional version jerry bickel race cars, in cooperation with etc, inc.
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. Performance trends offers a few different options, including a free trial. Like all ridetech 4links, this design features rjoint rod ends. The old model remains at the back of the drawing, you can use it as a guide when making adjustments to the layout or visually compare how the changes will perform when the suspension is in motion. This is when the yoke of the rearend is tilted upward more than the driveshaft. I am planning to dive into a 4link w panhard setup for my jeeps front suspension this weekend. Helpful suspension geometry calculators 4x4 offroad. Once the geometry has been set up, the paper will discuss how to measure the.
Department of mechanical engineering, union college advisor. Take a look at performance trends calculators here. Weve taken the knowledge from running thousands of miles of trails and developed suspension kits with optimized geometry for unmatched bindfree suspension performance. The air suspension provides increased operator and passenger comfort, ease of access. This kind of suspension always has some kind of panhard bar to keep the axle centered. Space gets really tight at the front differential, and the 3 link might be just the ticket. Apr 23, 2015 you can find it by simply projecting lines along suspension members to a point of intersection for example, the respective bars of a four link. Our 4 link kits set up your vehicle at stock ride height. Dec 06, 2019 with a normal 4 link, when you hit the brakes, the suspension geometry wants to lift the rear of the vehicle. Autowares racing and performance tech site software for auto racing and high performance cars data acquisition systems new and used engineering services and live seminars on performance and racing technology all types of tech info on racecar engines, chassis and suspension setup for road.
For windows 7, 8 and 10 with opengl see the faq for more details faq for more. The gbar and glink, canted4bar suspension systems directly replace the oem leaf springs and shocks for remarkably improved handling and performance. Ultraride has been the chassis air suspension system of choice for manufacturers seeking to improve the ride and handling of light and medium duty vehicles. A stickbystick build of a true longtravel prerunner rear. Triangulated 4 link rear suspension system chassis fabrication. Not sure which suspension kit is the best fit for you. There are 4 link bars mounted from the axle to the frame holding the axle in place both forward, back, and side to side. A variation on the radius arm suspension is the parallel four link, shown in the figure above. Suspension geometry part 1 camber, toe, caster, kpi.
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. This program is provided free of charge for personal use in the assisting of suspension calculations. This project is being built into a prerunner that will eventually be able to hit whoops at. 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. Jul 19, 2004 i am planning to dive into a 4 link w panhard setup for my jeeps front suspension this weekend. The traditional way the 4 link is setup on off road rigs is to have 2 links holding. With a normal 4 link, when you hit the brakes, the suspension geometry wants to lift the rear of the vehicle. 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. Over the years, drag racers with door cars have gone through all sorts of suspension arrangements. An indepth technical look at fourlink truck suspensions from design to a full suspension installation 4 wheel and offroad magazine. Choosing the right shocks, coilovers or air, reservoir of mono tube all details will be discussed, plus ian builds a mock up chassis and gives stepbystep instructions on how to calculate and build his favorite set up. A variation on the radius arm suspension is the parallel fourlink, shown in the figure above. Design of a rear suspension configuration for a live.
Knowing the budget for the build and the type of materials being used will justify the type of welding needing to be done. Daves customs unlimited universal front 3link kit is an excellent option for the person that wants to do it themselves we have put together all the highest quality components into a universal kit. Software for auto racing and high performance cars data acquisition systems new and used engineering services and live seminars on performance and racing technology all types of tech info on racecar engines, chassis and suspension setup for road. America, recreational and competition off road driving of 4x4 vehicles is a. The secret to the 4 link kit is the geometry and how it eliminates binding because it has no pan hard bar. These unwanted characteristics are caused by incorrect 4link geometry and they. The rock slayer offroad 4 link kits eliminate the panhard bar its a true 4 link. All you need is your toyota and average fabricating skills cutting, grinding, wielding. The 4link calculator lets you input, view, save, analyze and compare your 4link rear suspension geometry. Just a quick question for those of you in the know. See how we did it in the february 20 issue of mini. Feb 18, 2016 with the back half being done, work to the front suspension system will now begin.
Computer program to simulate and analyze rear suspension 4link setups for. It will utilize a solo xlt 19inch travel kit and a series of support tubes will connect the front end to the. Tci parabolic 5559 chevy pickup truck 4 lowering rear leaf kit. Choosing the right shocks, coilovers or air, reservoir of mono tube all details will be discussed, plus ian builds a mock up chassis and gives stepbystep instructions on how to calculate and build his. Four link suspension kits 4x4 offroad fabrication parts. Autoware autoware inc front suspension geometry software. Antisquat and roll center axis are the primary geometry considerations. Jun 01, 2007 ive recently learned that the reason my buggy doesnt do steep verticals very well is because i have built too much antisquat into my rear suspension. At some point you will want to enter your own suspension geometry data or even just just view the current model in more detail. Universal front 3link kit daves customs unlimited, llc.
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