Four link tuning ics versus geometry drag racing parts. Get the top car design, plans, building and customizing books available. 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. In drag racing terms, the doityourself approach is more feasible and. Topics covered will be axle alignment, pinion and preload adjustment, instant center and the neutral line and how it all works.
Others use a triangulated fourlink design with coil springs, like the gm. The 4link suspension is the most common and proven setup among the many different classes in drag racing, but it also has its own limitations namely in regards to adjustability. This suspension is very popular in drag racing but sees little use anywhere else. Suspension components, front suspension components, rear suspension systems, rear 4link suspension drag race sportsman 4link crossmember sportsman 4link for chassis pro 4link level 1 pro 4link level 2 4link suspension pro street ladder bar suspension pro street ladder bar suspension. Will cover trends, industry news and new products and designs. A 4link is designed to locate the rear axle with four links, two on each side.
Home rear suspension drag racing drag race 4link kits. This is an exploded view of the gm fbody threelink factory suspension design. Design of three and four link suspensions for off road use. Suspension components are the crux of our business.
Guide to setting up a late model dirt chassis and 4 link suspension. This is the first of a three part series from chris alstons chassisworks on tuning and calibrating for better drag race performance we all want to get the best performance out of our drag vehicle, and a properly tuned drag race suspension enables the vehicle to launch straight while. Drag race rear suspensionsthe demands of drag racing created a few interesting twists on the factory rear suspension designs. Option for changing the colors and line thickness of the line drawings. Shop the industrys largest selection of drag race suspension kits at. Need help on building a 4 links suspension from scratch. Following the antiroll bar, you can use adjustable shock absorbers front and rear, front suspension limiters, and to a lesser degree, specific coil spring rates to get the car to hook up. Of all of the systems, the most common youll see today is the equal length fourlink, probably followed by. Thats where i started, and i apprenticed under a guy named mark constantine at autofab racecars. That setup is a modern interpretation of ladder bars. Helix suspension brakes and steering hexttk2ed2c5 sku.
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 drag racing suspension. Over the years, drag racers with door cars have gone through all sorts of suspension arrangements. You must install nohop bars at an angle because of the center section design. When bolted in place, these jigs maintain the proper spacing between your 4link brackets while you weld them together. This variation of the fourlink rear suspension is a lot less common in factory cars. Its all about wheels, doesnt matter whether its dish, concave or offset, you will get your fix here. 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.
How to build a winning drag race chassis and suspension. For the best selection of 4 link suspension and rear racing suspensions look no further than jerry bickel race cars. Choose from four styles and three colors of ladders bars, or choose from five styles and three finishes of 4link. Computer program to simulate and analyze rear suspension 4link setups for instant.
With the suspension in place, and the rearend assembled, it was ready to go in the car and the only thing that kept us from driving the car was finishing the front suspension a major component that needed to be completed, installing our master power rear disc brake kit, and acquiring a new, longer driveshaft. If you spend a little time noodling with 4 link wizard or several other. Winning chassis design and setup for circle track and. Chassis and suspension modifications for street, drag and road racing use. Quartermax 4link kits offer the highest quaility and best value of any kits on the market. But as youll see in the photos, adjustable trailing arms are the firstand bestmethod of setting up a triangulated fourlink for drag racing. When building a 4link suspension, the lengths of the links, their positioning, and the angles at which they are mounted, will all determine how the suspension affects the vehicle chassis under acceleration, braking, and cornering. The most popular drag race rear suspension is the ladder bar combined. The two upper control arms are angled with the two front mounts farther apart than the two rear mounts. Pinion angle and driveshaft angle change, antisquat %, and more for drag racing. We go into details on how to setup a parallel 4link drag suspension. Figure 4 three link front left and four link rear rightshows a three link and four link system. With 4link suspension, the two functions of locating the rear axle and supporting the vehicle, are isolated. With its 12diameter bolt holes, the 4 link adjustments are now much finer and, of course.
Like the front system, the vertical separation of the links resists the drive and braking torsion. Here is a picture of a typical 4link setup for drag racing. Basic rearend geometry for 4 link cars simply explained. Choose from jegs, competition engineering and other high strength 4 link suspension kits or replacement parts. Drag racing suspension leading drag racing chassis. Jerry bickel reveals all with pro chassis construction book set. Most confusion surrounding the rear suspension linkage ladder barfourlink is in the actionreaction torque around the rear axle and its housing. This article is about expanding way many of us look at four link tuning. The chassisworks eliminator ii 4 link is the most sophisticated rear suspension available to day. Drag race 4link suspensions chris alstons chassisworks. Dot grid notebook dot matrix dotted memory journal book journal for work soft cover glossy 6 x 9 120 pages.
Book cover of wayne scraba how to build a winning drag race chassis and. Heavy duty rod ends are a must on any 4 link that will take right pedal abuse. Robs rod shop drag racing suspension episode 1 basic 4 link. Lift bars, slapper bars, super stock springs, leaf links, ladder bars, thre. Please practice handwashing and social distancing, and check out our resources for adapting to these times. The key to any successful acceleration contest is traction. Carli suspensions radius arm setup for the ford super duty includes new arm mounts, coil springs, reservoir shocks, radius arms, a steering stabilizer and more. Of all of the systems, the most common youll see today is the equal length four link, probably followed by the ladder bar. A 4link suspension has 4 mounting points on the rear axle and 4 on the chassis, not 4 and 2 as in the picture in the first post. With 4 link suspension, the two functions of locating the rear axle and supporting the vehicle, are isolated. How to buy and setup a four link 9inch rearend hot rod. This article explains the workings of the 4link suspension and the tuning methods used to maximize its performance under various track conditions.
Stateoftheart 4link suspension kits we offer on our website are the superior alternative to the inherent performance limitations of your leaf springs. The basics of antisquat, antidive, and roll center. 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. It includes basic theory on aerodynamic lift and drag, testing techniques, flow visualization and a. We chose the fabricated 9inch for the variety of available gear ratios, carriers, and brake kits designed specifically for racing. Its very similar to 4link designs except caster will change as the suspension cycles. Four link bar kits, adjustable 4link brackets, housing plates, 4link bolt kits and more. The housings were available in widths ranging from 22 inches all the way out to 62. The new setup is a fab9 from chris alstons chassisworks. Dave morgan, who wrote the box door slammers, the chassis book. 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 components from tube kits to suspension packages in stock. Also, all mustangs from 79 on use a triangulated 4 link. Add a 4 link suspension kit to your car or truck to add performance and adjustability to your suspension. This three link system worked well for drag racing applications with minor.
This book gives you some valuable tools to help you judge if a. Part1 covers rear end alignment, showing how to align a rear end housing. 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. 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.
Right the dragrace eliminator ii 4link rear suspension featured doublesheer, adjustable lower shock mounts designed to allow finetuning of the rear ride height. Aug 31, 2014 triangulated 4 link installation four link software program for drag racing suspension. A 4link system separates the functions of positioning the axle and supporting the vehicle. 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. Professional level 4link suspension system kits, components and accessories for drag racing vehicles. We highly recommend that you build a fullscale working model of your 4 link, or use the design parameters mentioned in. Autoshoppingcenter 4link kits universal rear weldon parallel 4link kits suspension detroit axle new 5piece front suspension kit 1 outer tie rod, pitmans arm to steering arm, 1 tie rod adjustment sleeve, 2 outer tie rod, steering to steering arm, 1 drag link 4x4 only. Ultimate adjustability with rjs extreme billet 4link system. Springs take care of supporting the vehicle which leaves the links free to deal with locating and articulation. The triangular layout of the top links resists sideways motion, and the lower links resist thrust. This information applies only to 4link rear suspensions having links floated on the rear axle with all links running forward. A guide to tuning your fourlink suspension system posted by wayne scraba on april 23, 2015 at 2. General motors and ford factory fourlink suspensions are quite similar to a fourlink style suspension in a tubechassis racing car, except it is not adjustable and the control arms are not parallel from front to rear.
Aside from building hot rods, i also build professional drag racing chassis. Academy delivers the ultimate educational experience for hardcore drag racers by providing users hours of hd video tutorials and indepth articles created by some of the industrys most respected professionals. Im new to this forum, and am hoping somebody can help me solve a couple mysteries about how to set up a four link for drag racing. Product tech chris alston explains drag racing suspensions. Which makes you faster, so you win, get famous, and live happy ever after. Tuning your fourlink suspension system drag racing. Again, the theoretical intersection point, or instant center is often all we pay attention to even though testing has shown that the holes we select is almost as important as the ic itself. Best car chassis, suspension, aerodynamics design books. Thats where rick jones race cars and quartermax come to the table. Tuning 4 link rear suspensions for the drag strip custom cars. Four link kits visit applied racing technology for a full range of qualtiy drag racing components. We pour higher technology into every component we offer. Tutorial videos that explain how to set up your 4link rear suspension. Previously i had begun this on another board and it got too large.
280 250 410 333 741 1295 1076 1432 573 407 1104 813 1048 974 1327 942 948 540 1253 1109 1291 405 153 286 1159 702 54 150 211 1276 568 1070 585 854 1089 467 881 1409 722