I have 19 inch long lowers center to center a 21 inch torque link at a 17. Dirt modified chassis how to nail your dirt mod suspension. Front view suspension geometry calculatorsimulator. Space gets really tight at the front differential, and the 3 link might be just the ticket. 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. Easily monitor proper ride height and lift with the userfriendly diagnostic software. Ultraride is a total conversion suspension that replaces a standard leaf spring suspension system. Available in multiple configurations and made in the usa.
Depending on the type of racing for race cars, the road surface and evolution of the vehicles, the suspension is designed to accommodate multiple requirements. Links may be made to the site, but the product may not be redistributed in any way other than by direct download from. This is the 3 link kit from our legend suspension kit. These systems are commonly found on vehicles used for the. The trailing arm angles affect the rear steer and bite and the pull bar, or lift arm, can redistribute load upon acceleration and deceleration. As you drag the mouse or the scroll bar, the car moves up and down in response. Nov 23, 2010 the only aftermarket link type suspension that i have come across that does not bind is a three link using spericalheim joints one link on each end of the rear. At some point you will want to enter your own suspension geometry data or even just just view the current model in more detail. Because internet explorers maximum url length is shorter than other browsers, your project cannot be saved properly in this browser.
The rear suspension is a 3 link with top link at 7 deg down toward the front 27 long. Typical rear suspension screen, here analyzing an angled 4 link rear suspension and driveshaft movement and u joint angles. I just finished looking at camburgs website and i see that they retained the framerails on the 3 link ranger on their website under the ranger 3 link rear suspension and still utilized a very nice upper tube chassis. These cars drive off the left rear more to keep them from being to loose, that is why you are starting to see the lf coming off the racetrack, it takes proper weight placement, rear bushing selection, spring choice, and ride heights to make it have a lot of traction but not be a three wheel out of control mess. This involves placing the force application points g and h on the centre of gravity. No part of the program or code shall be reproduced for commercial use. 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. 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. 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. Nov 16, 2010 in this chassis tech article circle track provides some advice and insights for nailing the suspension setup on your dirt modified race car to help you find success early circle track magazine. Pressing the edit button immediately switches to edit mode listing more details about the dimensions of the model and allowing you to.
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. Our standard 4link suspension comes with custom antisquat geometry and ready to accept ford mustang 8. Each car needs to be evaluated for where it is to be raced and then set correctly. Upper lateral link, lower reversed aarm, twin trailing links rear the classis 60s sports and racing car rear suspension. Autoware autoware inc front suspension geometry software. The air suspension provides increased operator and passenger comfort, ease of access and overall safety. Open config and change from swing axle lengths to suspension link chassis mounting points. By designing the rear suspension geometry to incorporate antisquat, rearward weight transfer under acceleration can be turned more efficiently into increased traction. At rock slayer offroad, we offer the first and only high performance 4 link complete kit on the market there is no competition. As before, this produces greatly increased jacking, and most designers would find this too disadvantageous.
The second effect of running the upper bars backward is completely screwed up handling dynamics. On my design, there are settings inbetween but think of the rear suspension having two positions, normal autox as 4555% and drag racing as 100% most of the references i have seen regarding adjustable antisquat on a 3 link. It is called 3 link, but is technically a 4 link when you include the trac bar. For windows 7, 8 and 10 with opengl see the faq for more details faq for more details.
Susprog3d suspension by design is a complete software package enabling the design, evaluation. A watts link is far more adjustable and allows for better tuning of your rear. Mar 23, 2005 looking for some info on seting up a 3 link rear suspension. The ambulance mode prevents the suspension from kneeling when the vehicle is in gear with a system enable signal. All chassis dimensions and specifications are editable.
We have pulled together all top notch parts and figured out all the mounting points for proper geometry to make your rig a top notch. Vehicle travel is simulated by dragging the image with the mouse or with a scroll bar. Front and rear suspension analysis simulation software program. The flexibility in the design of the suspension geometry allows the rear suspension to be matched to the front suspension, and each wheel tuned independently. Autoware autoware inc rear suspension geometry software. The dirt car rear geometry layouts are varied and usually highly adjustable for both late models and modifieds. For example, shortening the length of the upper link on a 3 link rear suspension will add pinion angle, but it will also roll the top of the rear end housing forward which will increase forward drive traction. Discussion in the hokey ass message board started by cyrus, mar 3, 2007.
For example, shortening the length of the upper link on a 3link rear suspension will add pinion angle, but it will also roll the top of the rear end housing forward which will increase forward drive traction. The first watts link was a vertical mount, the second was mounted horizontally under the rear center section. Like the front system, the vertical separation of the links resists the drive and braking torsion. Each system is comprised of a fabricated torque arm, a pair of. The new fast cars 3 link mgb rear suspension is designed around the ford 8 rear axle. Vsusp no longer supports any version of internet explorer. When designing a 3link suspension the upper link can be offset still parallel to the chassis centerline to the passenger side to counteract the torque transmitting through the rear end housing on acceleration. 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. This article explains the workings of the 4 link suspension and the tuning methods used to maximize its performance under various track conditions. We also have a quick overview and close up of our full floating 9 rear end that can be built to plug and play. This thesis outlines the process of designing a three link front, and four link rear suspension system.
Performance trends offers a few different options, including a free trial. Antipitch is the name given to a suspension geometry, front and rear that prevents pitch under braking. In your shop you need to spend the time needed to ensure that your rear end is exactly square. We used the 3 link with a watts link on our scca car back in the 80svery adjustable and durable. I just want to know if theres something im not seeing in this suspension geometry. Weve taken the knowledge from running thousands of miles of trails and developed suspension kits with optimized geometry for unmatched bindfree suspension performance. Would anyone happen to have a photo of this 3 link type setup. Covers conventional 3 link and 4 link suspensions allows bird cages on one or both. Dynatune suspension design module kinematic modeling. Rear triangulated 4 bar bushings and geometry the h. What angles should i start with on the lower link s and the panhard. All of our link suspension control arm brackets are made in the usa from a50 steel. All rock slayer offroad 4 link kits are authentic double triangulated 4 link front and rear kits. 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.
Suspension geometry software for purchase if you are on the market for a more indepth, customizable 4 link suspension calculator, you will likely need to purchase software. And soon will come with our 3 4 link multi purpose suspension we are using in project unfair. For windows 7, 8 and 10 with opengl see the faq for more details faq for more. The ame kit it also comes in tri angle 4 link which requires no relief cuts in the floor and full back seat. It provides a way to isolate the chassis and driver from the shocking jolts that the tires experience going over anything but a glasssmooth surface. The four link rear suspension shown in figure 4 three link front left and four link rear right uses four primary links and no secondary links. One of the most common questions we get about suspension setup and tuning is how 4 link geometry affects the performance and handling of. Be sure to check out the other videos on alignment. Ruffstuff specialties 3 link and 4 link suspension lower frame mount bracket for control arm link universal 0 degree chassis brackets. It includes graphs and suggestions for changes to your geometry. Since the leaves are no longer under as much lateral stress, they can now function better under the right geometry. The suspension analyzer does a complete 3d suspension analysis, including bump steer, ackerman, caster gain, anti dive, tire scrub, camber gain and much more.
Im involved with a pavement oval track car 2006 lefthander chassis running on a 3 8 mile medium banked oval track with approximately 500bhp. It provides a stable platform from which to control the vehicle. No one can predict the perfect set up, even for a spec formula where much of the suspension is fixed by the rules. Watch as we cover some of the steps to install our 3 link rear suspension system. The 4 link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. Kit can be used with johnny joints or the big 16 fk heims. 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. It a pain in the ass to fit a fully triangulated 4 link setup under the front of your rig which is why you see a lot of people running a 4 link in the rear and a 3 link setup in the front.
Theres a couple reasons why you would choose a 3 link setup vs a 4 link with the main reason being packaging. If you are on the market for a more indepth, customizable 4 link suspension calculator, you will likely need to purchase software. This program is provided free of charge for personal use in the assisting of suspension calculations. Everyone just refers to it as a 3 link, because it uses only 3 control arms. This would effectively be a triagulated link and negate the need for a panhard bar. Allows roll and bump or rebound suspension movements. I am chasing info and guidance on a wishbone 3 link rear suspension setup i would like to try if it is possible and will even work. The figure below is a simplified picture of the geometry at static conditions for a car with stock ride height and for one which has been lowered one inch. With a normal 4 link, when you hit the brakes, the suspension geometry wants to lift the rear of the vehicle. Design of three and four link suspensions for off road use.
Unequal length wishbone independent rear suspension showing a toe link and halfshaftcvjoint outboard. Now you can get all the racewise chassis school material in an easytouse software program for your home computer. Antisquat in a linked suspension system determines how the rear end of a. This kind of suspension always has some kind of panhard bar to keep the axle. The 3link rear suspension includes the 3 link frame, forged aluminum lower control arms, rodend adjustable upper trailing arm, axle mount banana bracket, koni coilover shocks, coilover kit, and springs, panhard bar, all fasteners, and bushings. A newer style that is only just now becoming stock in just a few vehicles and that works well as performance type of suspension. The standard 4link rear suspension is a great performance street car suspension. Understanding your three link suspension can give you adjustment tools to help you roll through the center of the turn or help to hook you up on exit. Oct 14, 2015 suspension geometry software for purchase. Upper lateral link, lower parallel links, twin trailing link rear. 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.
Rear suspension guide tech, terminology popular hot. The towerhauler mode ignores the input and allows the vehicle to kneel even if the vehicle is moving. In general your static rear setting should be dead square. 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. Use to analyze all popular oval track coil spring rear suspensions. 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. 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.
A variation on the radius arm suspension is the parallel four link, shown in the figure above. This suspension system has all 3 links running parallel to each other. Rear suspension geometry this is a software package that addressesthree link suspensions and late model four link. While ron loves to use software to work out combinations, his 38 years of. The 3 link i designed for my car has reached the quoting stage for some laser cut parts and i want to double check something before i commit my green. While this changes the pinion angle, it also changes the antisquat of the rear suspension which affects forward drive traction. Susprog3d is the premier kinematic suspension design and analysis tool. These unwanted characteristics are caused by incorrect 4link geometry and they can only be.
The triangular layout of the top links resists sideways motion, and the lower links resist thrust. There are dozens of variations of suspension types used on race and passenger vehicles. Barnes 4wd 3 link and 4 link brackets are the best choice when you are building a link suspension. Susprog3d is a complete 3d software package for the design, setup, evaluation and visualization of. Aug 27, 2015 part 6 in our series of tutorial videos that explain how to set up your rear suspension takes a look at basic 4 link set up and adjustments. 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 rrs 3 link is designed to transform the handling of an early ford chassis to match or exceed the demands of new millennium performance production fords. Complete graphs and reports are included, and several new. Bottom wishbone link 1 of attached inside frame on each side and under the middle of diff centre. Take a look at performance trends calculators here.
Bottom line though is that a front suspension is easier than a rear suspension in some ways. Race wise rear suspension geometry software afco racing. Nov 11, 2014 b mod chassis guide for fans and newbies rear suspension. The 3 link is designed to keep the rear axle centered, and to keep the pinion angle from changing keep the axle from rotating. B mod chassis guide for fans and newbies rear suspension. Spec is software for tuning motorcycle suspension and chassis geometry. Car weighs 2900 lbs with slightly over 50% rear wgt percentage. This kind of suspension always has some kind of panhard bar to keep the axle centered. I hooked up a camera to watch the 3 link work on our limited late model pro stock. When the race car accelerates, the rear end wraps up, placing the upper bars in tension while the lower bars are held in compression. Along with the movement of the chassis, the front link attachment points move, and the rear ones move correspondingly. Rear steer rigs turn quickly and the term push just would never apply.
The suspension on a vehicle serves multiple purposes. This information applies only to 4 link rear suspensions having links floated on the rear. Racewise provides the technical understanding of suspension and tire performance that racers must have in order to make no guesswork decisions. There are many thick textbooks, expensive software, and. Lower lateral link, upper reversed aarm, twin trailing links rear a variation on the above. Rear suspension screen lets you describe 8 different types of rear suspensions. I am planning to dive into a 4 link w panhard setup for my jeeps front suspension this weekend. Previously i had begun this on another board and it got too large. Rear suspension design three link four link two link. Stop guessing and start winning learn the facts of rear suspension geometry with this informative cdrom computer software. Motospec has been designed for racing use, with a simple interface and clear outputs, to assist motorcycle tuners and race teams make quick and knowledgeable decisions. Ford integral link independent rear suspension as used on the 2015 mustang. There is a 4 link and 3 link calculator on pirate, make sure you get the 3 link or your numbers will be off.