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 suspension. This chapter looks at muscle cars with rear suspension systems using coil springs with two upper and two lower control arms. 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. Additionally, you can quickly change instant centers without affecting pinion angle, preload, or wheelbase. Mar 12, 2015 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. The upright also locates these components in space. They are the best for all 4 link applications whether competition or pro street. 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. Drag racing suspension leading drag racing chassis. Computer program to simulate and analyze rear suspension 4link setups for instant. Suspension components are the crux of our business. It provides a stable platform from which to control the vehicle. Drag racing books drag racing software jerry bickel.
They keep your rear on center but do not put a load on the 4 link, such as with a diagonal type, and work independently of the 4 link. But there are also whole series of street and stockperformance vehicles including pro street, pro stock, sportsman and bracket, stock and super stock. Also, all mustangs from 79 on use a triangulated 4 link. The housings were available in widths ranging from 22 inches all the way out to 62. Chassis master software leading drag racing chassis builder. 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.
Right the drag race eliminator ii 4 link rear suspension featured doublesheer, adjustable lower shock mounts designed to allow finetuning of the rear ride height. 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. Guide to setting up a late model dirt chassis and 4 link suspension. Over the years, drag racers with door cars have gone through all sorts of suspension arrangements. Rearwheeldrive cars with rear coil springs and two upper and two lower control. 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. 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. It includes basic theory on aerodynamic lift and drag, testing techniques, flow visualization. Rear suspension design three link four link two link. However, keep in mind that chassis roll causes the link angles to change. Aug 02, 2017 pinion angle change is an important factor to take into consideration when designing your own suspension. We have complete lowering kits for a roadhugging sport stance, and lift kits to accommodate massive. There is no comparison to any other 4link software available.
Sign up for our newsletter to keep up to date on the progress. Upper link angles from 15 to 18 on the right and 10 to 15 on the left provide good forward bite. The suspension on a vehicle serves multiple purposes. Air suspension design book spreading airbag suspension. Jerry bickel race cars gives racers the technology to win. Hundreds of photos and illustrations illustrate what it takes to design, build, and tune the ultimate chassis for maximum cornering power on and off the track. Jerry bickel race cars, in cooperation with etc, inc.
Drag racing fourlink design greglocock automotive 27 nov 02 17. Race car ride height 101 with jerry bickel and chassis engineering. Drag racing encompasses many types of amateur and professional specialty racing vehicles including door cars, funny cars, motorcycles, dragsters, and pro modifieds. If your car wheel stands too much, you can angle the 4 link bars closer together at the. A good starting point for both links is 15 upwards to the front. Here you will find only the highest quality drag racing suspension components available. 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. Enter your mobile number or email address below and well send you a link to. Adjustable 4link suspension system leading drag racing. We go indepth with jerry bickel and curt perry from chassis engineering to. Chassis master software leading drag racing chassis. Make sure to subscribe to our channel to be updated with.
Hes authored five howto books and written over 4,500 tech articles that. This type is used not only in drag racing but in other motor sports as well. Almost 200 rare and stunning photographs from the late 1960s and earlytomid 1970s capture terrifying fires, explosions, and crashes, all byproducts on the quest to go faster. Feb 27, 2006 the three link setup another suspension type common on the racetrack but not seen very much on street cars, is the three link.
I use this program almost daily, both in my design. 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. This is a 4 link suspension with the two upper links angled in toward the differential. Quartermax 4link kits offer the highest quaility and best value of any kits on the market. Drag racing suspension tim mcamis performance parts. We use the upper links on a 4link suspension to enhance the forward bite. Design and analysis of suspension system for an all terrain vehicle shijil p, albin vargheese, aswin devasia, christin joseph, josin jacob abstract in this paper our work was to study the static and dynamic parameter of the suspension system of an atv by determining and analyzing the dynamics of the vehicle when driving on an off road racetrack. Previously i had begun this on another board and it got too large. 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. Apr 23, 2015 over the years, drag racers with door cars have gone through all sorts of suspension arrangements.
The 4link suspension system is infinitely adjustable with 18 inch increments thereby allowing hundreds of instant center options. 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. Used by many of the best teams in drag racing, chassis master is easy to set up and input information. Department of mechanical engineering, union college advisor.
The 4link calculator lets you input, view, save, analyze and compare your 4link rear suspension geometry. Feb 14, 2017 suspension geometry is important to a quality driving vehicle, and instant center is the foundation of any link type suspension. The threelink setup another suspension type common on the racetrack but not seen very much on street cars, is the threelink. I addressed the zlink or watts link same thing which is what is used on the typical jacobs ladder design. Fourlink kits create a definitive center for a rear suspension, and are commonly used with a. Choose from four styles and three colors of ladders bars, or choose from five styles and three finishes of 4link. Our 4link kits set up your vehicle at stock ride height. They are the best for all 4link applications whether competition or pro street. The upright or knuckle attaches the wheel, brake rotor, hub, brake caliper and steering arm to the vehicle as shown in diagram ku1 below. Chassis engineering explains the complex principles of suspension geometry and chassis design in terms the novice can easily understand and apply to any project. When you or your chassis builder installs the rearend in your car with a fourlink setup, thats the.
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. Suspension here you will find only the highest quality drag racing suspension components available. Suspension geometry is important to a quality driving vehicle, and instant center is the foundation of any linktype suspension. There is no comparison to any other 4 link software available. Best car chassis, suspension, aerodynamics design books. 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. Angle and driveshaft angle change, antisquat %, and more for drag racing. Four link kits create a definitive center for a rear suspension, and are commonly used with a. Drag racing books drag racing software jerry bickel race cars. Quartermile chaos looks at the treacherous side of drag racings golden age. Drag racing four link design greglocock automotive 27 nov 02 17. Rear suspension guide tech, terminology popular hot. Of all of the systems, the most common youll see today is the equal length fourlink, probably followed by the ladder bar.
Rear suspension series covers rear end alignment, pinion angle, preload, antiroll bar, ride height, basic 4link settings. 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. Relive drag racings dangerous past in this softcover edition of a previous best seller. Also featured are laser cut frame and housing brackets with 58 holes for greater strength. Air suspension design book, vol 1 link based rear suspension. Dave morgan, who wrote the box door slammers, the chassis book.
Binding is eliminated due to our 4link arch design. 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. Jerry bickels 4link wizard professional version jerry bickel race cars, in cooperation with etc, inc. The key to any successful acceleration contest is traction. Historically, three link suspensions have not been common with oems. According to suspension theory that car should be very wheel stand prone, because the point of actual instant center is far forward in front of the car and is also below the theoretical line of instant center.
Be sure to check out the other videos on alignment, pinion angle, preload, antiroll bar and ride height if you havent already. Just because the pinion is set perfectly at rideheight doesnt mean it is going to stay. 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. Choose from jegs, competition engineering and other high strength 4 link suspension kits or replacement parts. We can actually get the pivot points and the antisquat characteristics of the two to be the same.
David hodgson this thesis outlines the process of designing a three link front, and four link rear suspension system. In almost all racing aplications the top bar is pointed down to establish the instant center for best accelerating behavior. Apr 01, 2008 and for drag racing, a two link would work well theres no cornering in drag racing or a four link with 18 to 24inchlong bars and an ic thats in the middle of the chassis and 6 to 10 inches. 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. Davis, benjamin design of three and four link suspensions for off road motorsports. Rear suspension series covers rear end alignment, pinion angle, preload, antiroll bar, ride height, basic 4 link settings.
The 4link is a fixed factor with the chassis and has the ride height locked in. On top of the book, we have started a youtube channel that will be dedicated to general automotive and suspension subjects. Tuning your fourlink suspension system drag racing 351c. 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 best chassis shop for drag racing books and drag racing software to help with your race car setup and suspension tunning. These systems are commonly found on vehicles used for the sport of rock. The rock slayer offroad 4link kits eliminate the panhard bar its a true 4link. Design and manufacture of an adaptive suspension system a major qualifying project report submitted to the faculty of worcester polytechnic institute this report represents the work of wpi undergraduate students submitted to the faculty as evidence of completion of a degree requirement. Get the top car design, plans, building and customizing books available.
Thats where i started, and i apprenticed under a guy named mark constantine at autofab racecars. Pinion angle change is an important factor to take into consideration when designing your own suspension. Mar 06, 2007 how to build a winning drag race chassis and suspension. Package includes electronics and software to record drag racing vehicle performance. They keep your rear on center but do not put a load on the 4link, such as with a diagonal type, and work independently of the 4link.
Tuning your fourlink suspension system drag racing. Record, save, graph, report, correct, analyze and compare drag racing data like clutch or converter slip, acceleration rate, tire spin, torque, hp, exhaust temps, pressures, etc. Robs rod shop drag racing suspension episode 1 basic 4 link duration. Design and manufacture of an adaptive suspension system. Each laser link comes complete with grade 8 hardware. Drag race 4link suspensions chris alstons chassisworks. The lower control arms are built from the same diameter 4 chromemoly as the companys fourlink suspension systems. Calculates all possible instant center locations plus percentage of rise and squat. When bolted in place, these jigs maintain the proper spacing between your 4link brackets while you weld them together. A newer style that has come stock in many vehicles and that works well as an allaround type of suspension. This is a good book written by a known authority on automotive systems and operation. Right the dragrace eliminator ii 4link rear suspension featured doublesheer, adjustable lower shock mounts designed to allow finetuning of the rear ride height. We pour higher technology into every component we offer. Academy how to set up and utilize the rear suspension system on a tube chassis, 4link drag racing vehicle.
These cars include gm intermediates built in 19641977 abodies, 19781988 gbodies, 19941996 impala ss cars bbodies, and 19792004 ford mustangs foxbodies. 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. Add a 4 link suspension kit to your car or truck to add performance and adjustability to your suspension. Track all chassis information including corner weights and center of gravity. 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.
How to build a winning drag race chassis and suspension. We stock a huge assortment of shocks, struts, and coil and leaf springs, so whether you want a smooth street ride, responsive race handling, or rugged offroad control, you can get it here. Welcome to the home of great handling and ride quality. To understand how a 4link 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.
To understand how a 4 link can be made to provide such handling, you must first understand a few basics about rear suspensions. Four link kits visit applied racing technology for a full range of qualtiy drag racing components. Drag race and pro street suspension systems, rear 4link suspension drag. The angled upper links hold the axle in place side to side, so a panhard bar is not needed. Mar, 2015 this chapter looks at muscle cars with rear suspension systems using coil springs with two upper and two lower control arms. 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. 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. A full explanation as to why the instant center is important is a. Aside from building hot rods, i also build professional drag racing chassis. Academy how to set up and utilize the rear suspension system on a tube chassis, 4 link drag racing vehicle. A guide to tuning your four link suspension system posted by wayne scraba on april 23, 2015 at 2. Four link suspension drag race four link suspension use spherical rod ends for strength and extreme adjustability. Heavy duty rod ends are a must on any 4 link that will take right pedal abuse.
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