The roll center, as its name implies, is the center of rotation for a suspension system. A stock suspension car that uses 4 trailing arms is a true 4 link and can be treated, plotted, etc, as a true 4 link car so the savy racer looking for an edge can benifit from this information. The angled upper links provide lateral support for the rearend housing, eliminating the need for an additional panhard bar or watts link system. Track all chassis information including corner weights and center of gravity. Nov 08, 2018 the macpherson strut version of the original suspension calculator with the same easy to use drag and drop interface. Baseline suspensions ic calculators are designed specifically for our products. The rear suspension of a racecar plays an important role in how the car is setup and in its final chassis ride height. Four link kits create a definitive center for a rear suspension, and are commonly used with a. No part of the program or code shall be reproduced for commercial use. 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. Notice there are no ic points, in the suggestions box, below the neutral line.
I was looking at one from tim mcamis chassis, but there are so many other ones out there im not sure which one is better. Program software may be freely downloaded on any number of computers, but to activate software requires the purchase of a separate activation codes unique to each computer. This program was written for guys designing off road or rock climbing systems but the design math is the same. Forum link paste into forum without link shortening. Davis, benjamin design of three and four link suspensions for off road motorsports. Behind the production of all tmrc components are experienced and qualified craftsman, welders, programmers, and the latest equipment such as haas cnc machines to certify that every weld, cut and machined part. There are sections below that do separate the different ideas for a stock suspension car vs a true 4link car and the reasoning will be explained below. A while back, we did a sixpart rear suspension series that covered all of the basics to running a 4link suspension. David hodgson this thesis outlines the process of designing a three link front, and four link rear suspension system. It is the parallelprojected length along the horizontal axis. 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. 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. Thats where i started, and i apprenticed under a guy named mark constantine at autofab racecars. Previously i had begun this on another board and it got too large.
There is no comparison to any other 4 link software available. Part 6 in our series of tutorial videos that explain how to set up your rear suspension takes a look at 4link basics, set up and adjustments. Control arm bolts are measured from the ground up to the center of the bolts. Using them for any other kit will give false information that we will. 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. The chassis movement control allows you to raise and lower the chassis and also rotate the chassis by. Heavy duty rod ends are a must on any 4 link that will take right pedal abuse.
Install spherical housing bearings into the upper control arm mounts on the rearend housing. If you are on the market for a more indepth, customizable 4 link suspension calculator, you will likely need to purchase software. The vertical separation of the top and bottom links, mounted at the. Actual linkbars finish color is texturedblack powder coat. Attached is my current setup from the 4 link calculator program, with dave morgans suggestions, for a 3200 lb car, marked in green. Quickly and easily see the affect movement has on your suspension setup and adjust on the fly using the drag and drop editor. Also, all mustangs from 79 on use a triangulated 4 link.
Aside from building hot rods, i also build professional drag racing chassis. Performance trends 4 link calculator demo movie saving and more. Apr 30, 2009 performance trends 4 link calculator demo movie saving and more. Add a 4 link suspension kit to your car or truck to add performance and adjustability to your suspension. The 4 link calculator allows you to design, cost, and order complete linkages of multiple different styles, length, sizes and configurations. 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.
Used by many of the best teams in drag racing, chassis master is easy to set up and input information. Rear suspension design three link four link two link. The 4link calculator lets you input, view, save, analyze and compare your 4link rear suspension geometry. Attached is my current setup from the 4link calculator program, with dave morgans suggestions, for a 3200 lb car, marked in green. There is no comparison to any other 4link software available.
Drag race 4link suspensions chris alstons chassisworks. Also supports iso 8855 and sae j670e coordinate formats. Design of three and four link suspensions for off road use benjamin davis. Detroit axle 12 piece front suspension kit 2 lower ball joints, 2 upper ball joints, 1 idler arm, 1 center link, 2 adjustment links, tie rod ends fits 2wd models only 5. Finally get a handle on your instant centeric location, to help you hook up and go fast. Education software downloads 4 link calculator by performance trends inc and many more programs are available for instant and free download. When bolted in place, these jigs maintain the proper spacing between your 4link brackets while you weld them together. Jerry bickels 4link wizard professional version jerry bickel race cars, in cooperation with etc, inc.
Of all of the systems, the most common youll see today is the equal length fourlink, probably followed by the ladder bar. 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 universal triangulated 4 link enables you to install a hightravel rear suspension using a minimum of components and custom fabrication. Along with the movement of the chassis, the front link attachment points move, and the rear ones move correspondingly. These systems are commonly found on vehicles used for the sport of rock. The universal 4link plotter will work on any 4link brackets both standard and adjustable. A fourlink suspension uses links to locate the axle from moving side to side and front to back, while allowing it to travel up and down and articulate. Apr 23, 2015 over the years, drag racers with door cars have gone through all sorts of suspension arrangements.
It will show you pinion angle change as you bump the axle height. In fact, most offroad community forums share links to calculators that do not work or redirect you to an undesired webpage. Depending on the type of suspension, the roll center can be an actual pivot point or a virtual point in space and they dont necessarily lie along the center line of. Fourlink kits create a definitive center for a rear suspension, and are commonly used with a. Oct 14, 2015 free 3 link and 4 link calculator over the years, our industry has seen free suspension design software come and go. Allows entry of suspension measurements including control arm positions, ground clearance, wheelbase, center of gravity height, and tire diameters. The three link suspension in figure 4 three link front left and four link rear right uses three primary links shown in blue. Most modern highhorsepower bracket, top sportsman, pro stock, and pro modified cars use a 4linktype suspension. Vehicle travel is simulated by dragging the image with the mouse or with a scroll bar. 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.
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. All types of tech info on racecar engines, chassis and suspension setup for road. 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. Tuning your fourlink suspension system drag racing. You enter measurements for all 4 brackets for your car, or any number of cars. 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. 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. Computer program to simulate and analyze rear suspension 4link. Racecar ride height 101 with jerry bickel and chassis engineering. Most modern highhorsepower bracket, top sportsman, pro stock, and pro modified cars use a 4 link type suspension. In this article well cover what we consider to be the three most important elements. Universal 4link plotter digital download quartermax.
A stock suspension car that uses 4 trailing arms is a true 4link and can be treated, plotted, etc, as a true 4link car so the savy racer looking for an edge can benifit from this information. Front view suspension geometry calculatorsimulator. There is no comparison to any other 4link software. The macpherson strut version of the original suspension calculator with the same easy to use drag and drop interface. When building a 4link suspension, the lengths of the links, their positioning, and the angles at. This program is provided free of charge for personal use in the assisting of suspension calculations. As you drag the mouse or the scroll bar, the car moves up and down in response. There are sections below that do separate the different ideas for a stock suspension car vs a true 4 link car and the reasoning will be explained below. Computer program to simulate and analyze rear suspension 4 link setups for instant center, pinion angle and driveshaft angle change, antisquat %, and more for drag racing. Chassis master software leading drag racing chassis. Calculate the 4link setup in any car, with any brackets in less than 15. The best fourlink software for drag car or dragster chassis setup. If you want to use this calculator ad free, enable unlimited private models, enable more reporting options and work offline using the android or ipad apps, please subscribe using paypal button. Design of three and four link suspensions for off road use.
In this video, we are going to get a little more advanced by explaining the concept of rear steer and how it can be used on your race car. Not sure which suspension kit is the best fit for you. 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. Simply take 8 easy measurements with a tape measure and. Performance trends 4 link calculator demo movie saving and. You will see a lot of useful help in the fact that you can vary 4 link tube lenght, diameter, wall thickness and material choice. We must agree with the current majority that a fourlink suspension with coils, coilovers, quarterelliptics, or air springs is definitely cool, and that is the most common argument for. The calculations vary from motion ratios, to spring stiffness, to wheel loads.
The universal triangulated 4link enables you to install a hightravel rear suspension using a minimum of components and custom fabrication. Computer program to simulate and analyze rear suspension 4link setups for instant center, pinion angle and driveshaft angle change, antisquat %, and more for drag racing. Race car ride height 101 with jerry bickel and chassis. And for drag racing, a twolink would work well theres no cornering in drag racing or a fourlink with 18 to 24inchlong bars and an ic thats in the middle of the chassis and 6 to 10 inches. Behind the production of all tmrc components are experienced and qualified craftsman, welders, programmers, and the latest equipment such as haas cnc machines to certify that every weld, cut and machined part is precise, consistent and of the utmost quality. The suspension calculator aims to help people who are building race cars perform suspension related calculations. A guide to tuning your four link suspension system posted by wayne scraba on april 23, 2015 at 2.
Autoware autoware inc rear suspension geometry software. Chassis master software leading drag racing chassis builder. So whether its a 2,000plus hp drag car, or a 450 hp street car, these arms can handle whatever the car owner throws at them. The stock rubber poly bushings and shells must be fully removed down to the bare housing material first. Department of mechanical engineering, union college advisor. Antisquat in a linked suspension system determines how the rear end of a vehicle. You can define an unlimited number of front and rear mounting points for both the upper and lower links. Calculates all possible instant center locations plus percentage of rise and squat. Chris alstons chassisworks, inc chassisworks weldin. There is a roll center for the front suspension and rear suspension. The 4 link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. 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. Actual link bars finish color is texturedblack powder coat. Finding your center finding your front and rear roll center.
Download 4 link suspension calculator for free windows. Instant center calculator for your drag car suspension. Performance trends offers a few different options, including a free trial. We also offer a several 3 link suspension kit options. The universal 4 link plotter will work on any 4 link brackets both standard and adjustable.
The 4link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. These allow vertical motion while resisting forward and aft motion. Quartermax 4link kits offer the highest quaility and best value of any kits on the market. Choose from jegs, competition engineering and other high strength 4 link suspension kits or replacement parts. Performance calculators tim mcamis performance parts. Tuning your fourlink suspension system drag racing 351c. If your car wheel stands too much, you can angle the 4 link bars closer together at the. Use a sandroller bit or something similar to sand down the i.
Lift bars, slapper bars, super stock springs, leaf links, ladder bars, thre. For the best selection of 4 link suspension and rear racing suspensions look no further than jerry bickel race cars. Over the years, drag racers with door cars have gone through all sorts of suspension arrangements. The lower control arms are built from the same diameter 4 chromemoly as the companys fourlink suspension systems.
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