Dec 17, 2014 a drag shock is designed with far higher shaft velocities than a pro touring style shock is designed with. These cars include gm intermediates built in 19641977 abodies, 19781988 gbodies, 19941996 impala ss cars bbodies, and 19792004 ford mustangs foxbodies. Jul 16, 2012 the best thing i found was to balance the front weights with coil overs or sway bar shimming rear balance didnt matter to me since it wasnt doing much but being towed along but 600lbin rear springs make sure the weight stayed up front i had bought themfor fronts but played with things here and there and i ran the 250 lb ones up front at. Steel body double adjustable rear shock adjustment. 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. Computer program to simulate and analyze rear suspension 4link setups for. 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. 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. Rear suspension geometry this is a software package that addressesthreelink suspensions and late.
Track all chassis information including corner weights and center of gravity. Racing software raceworks electronic racing logbook. Apr 23, 2015 over the years, drag racers with door cars have gone through all sorts of suspension arrangements. Simply take 8 easy measurements with a tape measure and input them into the universal plotter to find the instant center of the 4link location. Welcome to the home of great handling and ride quality. It includes graphs and suggestions for changes to your geometry. You might also want to paint a thin mark all the way around the outside edge of the tire to help view the contact patch and tire. There is no comparison to any other 4link software available. The key to any successful acceleration contest is traction.
You must pay close attention to where youre positioning all of the parts in the car, besides the driver. The rear suspension of a racecar plays an important role in how the car is setup and in its final chassis ride height. The rear separates more and the front also wheelies higher and longer. Baseline setting for steel body rear shocks drag radial cars. Finally get a handle on your instant centeric location, to help you hook up and go fast. Aug 06, 20 with this easy to use microsoftwindows friendly software you are able to save, rename, and also print multiple 4 link setups for future reference. Spec is software for tuning motorcycle suspension and chassis geometry. Rear suspension geometry this is a software package. Rearwheeldrive cars with rear coil springs and two upper and two lower control. The chassis always returns to the static position when releasing the mouse. Drag racing suspension setup and tuning with digital video. With this easy to use microsoftwindows friendly software you are able.
With six years of intensive work and over 9,000 hours of development, crew chief pro offers the most incredible program for drag racing. Suspension components are the crux of our business. Mar, 2015 this chapter looks at muscle cars with rear suspension systems using coil springs with two upper and two lower control arms. Jerry bickels 4link wizard professional version jerry bickel race cars, in cooperation with etc, inc. You might also want to paint a thin mark all the way around the outside edge of the tire to help view the contact patch and tire distortion. Academy provides the ultimate educational experience for hardcore drag racers. The rick jones chassis tuning guide, second edition quartermax. A fourlink offers the most adjustability of any rear axle location system, probably best suited for drag cars but worth mentioning here in case youre building a car with a performance bent. Suspension here you will find only the highest quality drag racing suspension components available. Racecar ride height 101 with jerry bickel and chassis engineering.
Ideally you want to capture the left front and rear of the car. All chassis dimensions and specifications are editable. Most springs for drag racing are working at a linear rate. 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.
All books and software are nonreturnable and nonrefundable. Chassis master software leading drag racing chassis builder. When adjustments become necessary to a drag race vehicle, strange shocks prove to be a valuable tool to alter the reaction of the suspension to compensate for the change. As a general guideline, lighter springs allow the car to easily transfer weight, and settle faster down track. This coilover shock is designed to simplify the process of tuning your suspension.
Featuring hours of hd video tutorials and indepth articles created by some of drag racings most respected professionals, dra provides invaluable lessons which cover areas such as chassis setup, tuning, maintenance and anything that involves a serious. Drag racing suspension setup and tuning using video. Unlike ladder bars, a fourlink rear suspension provides many chassis adjustment choices, resulting in numerous possible instant centers. The only cars that should be squatting during the launch are those cars that shock the tires very hard 4speed cars and with enough power where the car. 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. What were doing inside the shock is controlling how quickly oil is passing through the valve. A guide to tuning your fourlink suspension system posted by wayne scraba on april 23, 2015 at 2. Tutorial videos for drag racers created by some of drag racings most. Spring rate is a big deal as well as your rear rate will be affecting the weight transfer by resisting it. For radial cars we prefer the shock to be mounted so that there is 4 of extension from ride height and with a short and high instant center. For a car that squats in the rear upon acceleration you may need to loosen the shock to get maximum weight transfer pitch rotation. Sometimes you have to adjust the ride height of the car to get the. Rear suspension series covers rear end alignment, pinion angle, preload, antiroll bar, ride height, basic 4link settings. We have literally thousands and thousands of potential valving combos that we can build, so tuning is a process that can get very detailed.
Which makes you faster, so you win, get famous, and live happy ever after. Chassis master software leading drag racing chassis. Use a shoe marker and paint a mark on the side of the rear tire so you can watch to see if the tire is spinning. You need at least 45% of the cars weight on the rear wheels to. Most modern highhorsepower bracket, top sportsman, pro stock, and pro modified cars use a 4linktype suspension. The rear suspension of a racecar plays an important role in how the car is. Whether the car is a stock suspension car running s down to 7s or a full tube chassis car running s down to 7s this info can be used successfully. For a car that raises in the rear upon acceleration.
The following adjustments are based with all sweeps or clicks starting from a full tight adjustment clockwise position. The 4link calculator lets you input, view, save, analyze and compare your 4link rear suspension geometry. Dont get too soft or you may lose the control your shock has on your suspension, thus allowing it to do unexpected things. If i am using a rwd car do i want my rear high and front low like rl, what about spring rates and anti roll bars etc, do these things have any effect at the strip. Chassis setup, tuning, maintenance, engines and more. Right the dragrace eliminator ii 4link rear suspension featured doublesheer, adjustable lower shock mounts designed to allow finetuning of the rear ride height. Calculates all possible instant center locations plus percentage of rise and squat. Race car ride height 101 with jerry bickel and chassis engineering. Of all of the systems, the most common youll see today is the equal length fourlink. Spring and shock selection play a crucial enough role that zimmerman has worked with strange as well as a spring manufacturer to develop custom valved shocks and specialized springs. Universal 4link plotter digital download quartermax. Angle and driveshaft angle change, antisquat %, and more for drag racing. On a poorly prepped surface or when the track starts getting greasy i tighten up the rear rebound which reduces separation, wheelie and hit to the tire.
A drag race car should run the lightest front spring rate possible, without letting the shocks bottom out when making a pass. Rear springs should be a little stiffer for a drag car but many people think that the car should squat during the launch so they install softer rear springs on the car to accomplish this. Dec 29, 2014 drag racing suspension setup and tuning with digital video. Choose from four styles and three colors of ladders bars, or choose from five styles and three finishes of 4link. Academy how to set up and utilize the rear suspension system on a tube chassis, 4link drag racing vehicle. Tuning 4 link rear suspensions can make a car launch quicker and use less horsepower to do it. Robs rod shop drag racing suspension episode 1 basic 4 link duration. Afcos drag race shock tuning guide provides the basic road map to making your car hook and book. The key factors here are that any shock or strut for a drag racing application should be adjustable, and feature drag raceoriented valving. As you move the chassis notice the variations are displayed within the calculator. Calculate the 4link setup in any car, with any brackets in less than 15 minutes with this easy to use quartermax universal 4link plotter. If its a really bad surface i tighten up rebound then add weight to the rear of the car. Shop the industrys largest selection of drag race suspension kits at.
Raceworks is a full featured drag racing logbook allowing for run storage, run analysis, run prediction, maintenance scheduling, vehicle setup, weather tracking and also directly interfaces with performaire and. The best chassis shop for drag racing books and drag racing software to help with your race car setup and suspension tunning. 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. We pour higher technology into every component we offer. Drag brakes, shocks, and suspension tuning chevy high. Calculate the 4link setup in any car, with any brackets in less than 15. A stock suspension car that uses 4 trailing arms is a true 4link and can be treated, plotted, etc. 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. Drag racing books drag racing software jerry bickel. With over 50 years of drag racing experience the joneses cover everything from the. 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.
Jan 23, 2015 brian lohnes 20 drivetrain tech, 20 tech story, bangshift 20 comments off on tech tips. Tuning your fourlink suspension system drag racing 351c. The housings were available in widths ranging from 22 inches all the way out to 62. Jerry bickel race cars gives racers the technology to win. Drag racing suspension setup and tuning using video dragstuff. Use a shoe marker and paint a mark on the side of the rear tire so you can watch to see if the tire is. You need at least 45% of the cars weight on the rear wheels to make a 4 link suspension work properly.
No one can predict the perfect set up, even for a spec formula where much of the suspension is fixed by the rules. So what are the ins and outs of tuning your suspension for drag racing. Youll be amazed by its flexibility, ease of use, great graphics, and. Software engineers, math professors, and other experts were consulted to ensure crew chief pro would be unsurpassed in every aspect. However, if there is rear tire shake, wheel hop or excessive body separation proceed first to step 4 and. Nov 08, 20 strange engineering talks drag brakes, shocks, and suspension tuning set your chevelle body on new energy suspension polyurethane mounts modernizing your c1 or c2 corvette with the latest ame chassis. Drag racing suspension tim mcamis performance parts. Used by many of the best teams in drag racing, chassis master is easy to set up and input information. Introducing the 4link wizard software for microsoft windows 95, 98, me, xp, 2000 or nt.
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. Drag racing books drag racing software jerry bickel race cars. Every driver, every crew knows where they want to be at what we call cold tire pressure.
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