In simple terms, it keeps the body from roll rotating on the launch. 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. Get the top car design, plans, building and customizing books available. The angle of the top bar is the final ingredient to determining how much bite the tire will have, and for how long.
Drag racing parts chassis, suspension, and driveline products. Drag race and pro street body, door, and window brake kits chassis kits driver area accessories drivetrain mounts exhaust systems, components frame clips, front bolt on frame clips, front weldin frame clips, rear 4 link drag race sportsman 4 link 3x2 sportsman 4 link 158 sportsman 4 link 4x2. To understand how a 4 link can be made to provide such handling, you must first understand a few basics about rear suspensions. Design of three and four link suspensions for off road use benjamin davis. Chassis and suspension 4 linkswing arm dragster burnout my buddy finally got to run his dragster for the first time and i have a question. Adjustable 4link suspension system leading drag racing. Jerry bickels 4link wizard professional version jerry bickel race cars, in cooperation with etc, inc.
Sep 01, 2009 the metric four link suspension design is a bit different than most other rear suspensions. Drag race 4link suspensions chris alstons chassisworks. Vehicle travel is simulated by dragging the image with the mouse or with a scroll bar. Aside from building hot rods, i also build professional drag racing chassis. Tuning your fourlink suspension system drag racing. To understand how a 4link can be made to provide such handling, you must first understand a few basics about rear suspensions. It includes basic theory on aerodynamic lift and drag, testing techniques, flow visualization and a. Universal rear weldon parallel 4 link suspension kits. There are many branches of 4x4 motorsports such as high speed desert racing, hill climbs, sand dune racing, and rock bouncing.
The factory five 4link rear suspension is a great value it is the standard solidaxle rear suspension in the mk4 roadster, type 65 coupe, and 33 hot rod. These new 4link kits are designed to strengthen your drag cars suspension without breaking the bank. 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. Be sure to check out the other videos on alignment, pinion angle, preload, antiroll bar and ride height if you havent already. Topics covered will be axle alignment, pinion and preload adjustment, instant center and the neutral line and how it all works. Four links chassis engineering drag racing parts, drag. Jul 3, 2016 triangulated 4 link installation triangulated 4 link rear suspension stay safe and healthy. Manufactured applying the latest technology and uptodate equipment, it provides cuttingedge performance your prized possession deserves. Suspension components are the crux of our business.
Checkered racing offers the following returns policy. Rear brackets feature upper and lower wheelie bar tabs, lower shock mounts and cross tube provisions. The flatter the top bar, the easier it is to use its pull on the chassis to plant the tire. If for any reason you are not completely satisfied, please contact checkered racing within 30 days. Sep 23, 2011 a 2 link can also be ladder barstoo stiff for street as it turn the rear axle housing into a large anti sway bar.
Previously i had begun this on another board and it got too large. Suspension basics and drag racing dynamics march 12, 2015 by muscle car diy this chapter explains the basic physics occurring on the starting line when you launch your car, along with why it does or doesnt do what it should. 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. This configuration is common in general motors cars built in and around the 1980s as well as some ford. Drag racing four link design greglocock automotive 27 nov 02 17.
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. 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. You could do parallel four link, with johnny joints or ballistic, truss the rear axle, and run a panhard from the frame rail to the top of the truss. From infinitely adjustable 4 link brackets to heavy duty 4 link bars, antiroll bars, sway bars, wishbone and housing locator kits all the way to penske shocks, nitrogen fill kits, strange engineering components and more, you can find what it takes to put together a stateoftheart drag racing suspension.
A newer style that is only just now becoming stock in just a few vehicles and that works well as performance type of suspension. Angle and driveshaft angle change, antisquat %, and more for drag racing. You can still use the drag racing shock on streetstrip vehicles though. I just saw a 360 mopar powered d50 this past weekend running 7 flat in the 8th mile with leaf springs, and he was indeed pulling the front wheels all the way through first gear. This three link system worked well for drag racing applications with minor. Apr 27, 2016 when lexus redesigned the isgsrc platform 3rd generation they changed the rear suspension design from a rear coilover shock, to a divorced spring setup as shown in figure 3 below. These cars include gm intermediates built in 19641977 abodies, 19781988 gbodies, 19941996 impala ss cars bbodies, and 19792004 ford mustangs foxbodies. The 4link system includes adjustable link mounts, doublesheer, lower shock mounts and even provisions for a tubular antiroll bar. Upper and lower virtual aarms, steering link front upper and lower virtual aarms, toe link rear as used on some mercedes rear. Its a 00 fritz, 235 swing arm, 565 rehermorrison, 1. Quickly change instant centers without affecting pinion angle, preload, or wheelbase. Along with the movement of the chassis, the front link attachment points move, and the rear ones move correspondingly. Extreme pro series 4link chassis bracket doubler plate, lower.
Mar 03, 2014 by reading this book you will discover all the proven methods on. An antiroll bar can also be mounted on the rear axle housing. If your primary concern is to go drag racing and achieve the best possible 60 ft. Here you will find only the highest quality drag racing suspension components available. 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. Drag racing suspension tim mcamis performance parts. The 4 link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. Rearwheeldrive cars with rear coil springs and two. We pour higher technology into every component we offer. Product tech chris alston explains drag racing suspensions. This chapter looks at muscle cars with rear suspension systems using coil springs with two upper and two lower control arms. Of all of the systems, the most common youll see today is the equal length fourlink, probably followed by. The most popular drag race rear suspension is the ladder bar combined.
This variation of the fourlink rear suspension is a lot less common in factory cars. Four link bar kits, adjustable 4link brackets, housing plates, 4link bolt kits and more. This is the same design that we developed, tested and install on our 6second pro modified cars. That will make adjusting easier as well as giving you a visual of where the instant center will fall with the rear suspension at ride height. Mar, 2015 this chapter looks at muscle cars with rear suspension systems using coil springs with two upper and two lower control arms. 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. Four link suspension drag race four link suspension use spherical rod ends for strength and extreme adjustability.
Also, the longer it is, the less lateral movement the axle will have while traveling, but you shouldnt have much travel drag racing, like you would with a 14 off road suspension. Lower lateral link, upper reversed aarm, twin trailing links rear a variation on. Bars like this are typically welded into the chassis and tied to the housing by adjustable links. Drag racing fourlink design greglocock automotive 27 nov 02 17. Four link tuning ics versus geometry drag racing parts. The jbrc 4link rear suspension kit is manufactured with 4 moly 4link brackets, 114 x. With its 12diameter bolt holes, the 4 link adjustments are now much finer and, of course, there are more from which to choose. Quartermax 4link kits offer the highest quaility and best value of any kits on the market. How to build a winning drag race chassis and suspension. Stateoftheart 4link suspension kits we offer on our website are the superior alternative to the inherent performance limitations of your leaf springs. 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. The remaining adjustment is in the lower portion of the bars and is for returning the pinion angle to its correct position at 1 to 2 degrees nose down in relation to the driveshaft.
This is an exploded view of the gm fbody threelink factory suspension design. Book cover of wayne scraba how to build a winning drag race chassis and. This unit welds on the inside of the existing frame rails, a somewhat unique feature compared to other products available. Chevy impala 4link suspension kits bolton, universal. Aug 27, 2015 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. Dave morgan, who wrote the box door slammers, the chassis book.
May 08, 2005 aside from building hot rods, i also build professional drag racing chassis. The higher the car is an influence here, and if the front suspension is soft and rises during the launch that raises the cg further. Heavy duty rod ends are a must on any 4 link that will take right pedal abuse. Couplers electronics flex plate shields ford center sections four links four link tube and tube adaptor kit fourlink packages fourlink rod end kits fourlink suspension and subframe kit heavy duty pro four link kits the new ultimate ii double adjustable fourlink top. Best car chassis, suspension, aerodynamics design books. Drag racing complete suspension kits speedway motors.
Shop the industrys largest selection of drag race suspension kits at. The drag race bars when set up correctly form an open ended triangle to permit you to change what is called the cars instant center theoretical point that the tires pushto achieve the ultimate in traction control. Competition engineering c2017 standard series 4link kit. This suspension system has all 3 links running parallel to each other. For the best selection of 4 link suspension and rear racing suspensions look no further than jerry bickel race cars. Ladder bar and fourlink suspension assemblys magnum force.
Guide to setting up a late model dirt chassis and 4 link suspension. Metric fourlink suspension design circle track magazine. Winning chassis design and setup for circle track and. Like all ridetech 4 links, this design features rjoint rod ends. Jerry bickel race cars gives racers the technology to win. The trangulated 4 links frank mentioned are designed more for handling, as is the ame 4 link. In this article well cover what we consider to be the three most important elements. Academy how to set up and utilize the rear suspension system on a tube chassis, 4 link drag racing vehicle. They will run every bit as fast as a 4 link and last a long time on anything other than an extreme drag race only application.
Others use a triangulated fourlink design with coil springs, like the gm. A 4link system separates the functions of positioning the axle and supporting the vehicle. 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. We go into details on how to setup a parallel 4link drag suspension. The housings were available in widths ranging from 22 inches all the way out to 62. This kind of suspension always has some kind of panhard bar to keep the axle centered. This suspension is very popular in drag racing but sees little use anywhere else.
This kit features our billet weldon chassis brackets that utilize a unique bolt on 4link plate system with. 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. Four link kits visit applied racing technology for a full selection of quality drag racing components. This rear kit enables you to minitub your car to allow for wider tires. Choose from four styles and three colors of ladders bars, or choose from five styles and three finishes of 4link. Tuning your fourlink suspension system drag racing 351c. Adjustable 4link suspension system is infinitely adjustable with 18 inch increments allowing hundreds of instant center options. Design of three and four link suspensions for off road use. Thus, if you add some serious number of horses to your chevy impalas underhood potential and dont want its rear suspension being screwed up, the 4link kit will be useful. On a triangulated 4link the uppers bars are placed at an angle relative to the vehicle centerline. One piece stainless steel urethane adjusters are used in the links with left and right hand threaded tubes so you can preload the suspension in a hurry.
Please contact our customer service representatives at 8123250819 from 7. Robs rod shop drag racing suspension episode 1 basic 4. Drag racing suspension leading drag racing chassis. 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. Robs rod shop drag racing suspension episode 1 basic 4 link robs rod shop. Of all of the systems, the most common youll see today is the equal length four link, probably followed by the ladder bar. Helix 9240 trifive triangulated 4link kit with hardware.
Over the years, drag racers with door cars have gone through all sorts of suspension arrangements. The four link pictured in this thread is clearly a drag racing piece. This book gives you some valuable tools to help you judge if a. It features adjustable pinion angle and improved handling over the 4link rear suspension. Springs take care of supporting the vehicle which leaves the links free to deal with locating and articulation. Thats where i started, and i apprenticed under a guy named mark constantine at autofab racecars. Computer program to simulate and analyze rear suspension 4link setups for instant.
With 4link suspension, the two functions of locating the rear axle and supporting the vehicle, are isolated. Add a 4 link suspension kit to your car or truck to add performance and adjustability to your suspension. Choose from jegs, competition engineering and other high strength 4 link suspension kits or replacement parts. Home rear suspension drag racing drag race 4link kits. Four link bar kits, adjustable 4 link brackets, housing plates, 4 link bolt kits and more. When connected securely to the axle and the frame, they form a triangle. Drag race 4link frame clips chris alstons chassisworks. As you drag the mouse or the scroll bar, the car moves up and down in response. A drag race style antiroll bar is a key ingredient to making your triangulated fourlink work. Drag racing complete suspension kits parts instock with sameday shipping. 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. The key to any successful acceleration contest is traction.
Rearwheeldrive cars with rear coil springs and two upper and two lower control. When bolted in place, these jigs maintain the proper spacing between your 4link brackets while you weld them together. Upper lateral link, lower reversed aarm, twin trailing links rear the classis 60s sports and racing car rear suspension. In a divorced spring setup, the spring no longer sits on the shock absorber, rather it is wedged between the lower control arm and the floor pan of the rear trunk. Quartermaxs extreme adjustable billet 4link bracket kit was designed by rick jones and has been installed on rj race cars for over 15 years. Four link kits visit applied racing technology for a full range of qualtiy drag racing components. 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. From infinitely adjustable 4link brackets to heavy duty 4link bars, antiroll bars, sway bars, wishbone and housing locator kits all the way to penske shocks, nitrogen fill kits, strange engineering components and more, you can find what it takes to put together a stateoftheart rear. Right the dragrace eliminator ii 4link rear suspension featured doublesheer, adjustable lower shock mounts designed to allow finetuning of the rear ride height.
Here is ridetechs universal triangulated 4link rear suspension system. Ame may also be making a 3 link for first generation fbodies. Rear suspension series covers rear end alignment, pinion angle, preload, antiroll bar, ride height, basic 4 link settings. The 3link is our raceproven, and streetable upgraded solidaxle rear suspension. The ultimate in quality and operation thats all about this stateoftheart helix product. This 4 link suspension is the best prostreet suspension available anywhere. The 4link calculator lets you input, view, save, analyze and compare your 4link rear suspension geometry. The roll, lateral shift, or longitudinal movement fourlink kits can handle much more than standard equipment of most cars. With a 2 link suspension the instant center is the front pivot point, where with a 4 link the instant center moves with suspension travel. Also, all mustangs from 79 on use a triangulated 4 link. Finally get a handle on your instant centeric location, to help you hook up and go fast.
Please practice handwashing and social distancing, and check out our resources for adapting to these times. Jegs is proud to introduce their new 4link suspension kits for drag cars. Professional level 4 link suspension system kits, components and accessories for drag racing vehicles. 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. Drag race rear suspensionsthe demands of drag racing created a few interesting twists on the factory rear suspension designs. Jegs 4link suspension kit was created for the high horsepower drag car. So a low rate soft spring with high stored energy, soft shocks, and lots of front suspension travel means the front rises easilly during launch. 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. Professional level 4link suspension system kits, components and accessories for drag racing vehicles. You must install nohop bars at an angle because of the center section design. A guide to tuning your four link suspension system posted by wayne scraba on april 23, 2015 at 2.
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