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A good SEALS, FRONT TRAILING ARMS, SET OF 4 *GERMAN* STD BUG / THING / GHIA 1966-77. Dave here in Saskatoon been racing a g body for many years now and struggle to get 2.50 from axle tube to center of hole. change. 2-5 Rear Spring Table. Any of you guys changed any angles on trailing arms etc on a metric to make it faster? Your email address will not be published. Truth!^^^^^. Check Tire temps, if LF is coolest (unbalanced setup): Decrease front springs, maybe even use reverse split (LF stiffer). That can work for a mild street or bracket car, but will make a high-horsepower car react violently at launch. The bushings wore out in the lowers and my left tire got in the wheel tub. (on a clamp bracket) generally tightens corner handling. The trailing arms can be mounted parallel to the centerline of the car, or angled with the front mounts closer to centerline. birdcage to move forward more during chassis roll than in A triangulated four-link puts the instant center (I/C) locationthe imaginary point of where the rear suspension components intersect, and the point theyrotate around in a given (instant) positionway out front, often close to the engine. $15.75. I'm new at this how do u do that and does it makr a big difference. But If the Panhard bar is mounted on the right side of the chassis and level to the ground, the rear end will be pulled to the right, and will steer to the left when the chassis moves during cornering. So, teams need to take this rate difference into account. The instant center is also rather high; the angles of the bars can raise it somewhere above the front wheel spindle. Advance Design Trucks seem to be using rear ends with widths ranging from 58"- 62". PDF Metric 4 Link Setup For Dirt - annualreport.psg.fr Then this NEW trailing arm bracket kit is a must have. Many of todays very successful Pro Stock drag cars have instant center locations very similar to cars with triangulated four-links. SKU: 64-67ABox. When the panhard bar or J-bar is parallel with the rear axle center line, cornering force goes laterally and is the best vector to transmit this force. suspension bump (compression) movement. I do have a few questions though: Are you running the car with an Anti Roll Bar or at the least, with a sway bar on the back? The asphalt racing surface provides a lot of traction, even on those flat "slick" tracks. In order to keep the driveshaft and U-joints operating in a (more or less) straight line when youre on the throttle, the pinion angle has to be correct. Pem 9" Grand National Limited Floater Rear End Housing - Re-ssm-5800 2022 Racelogic Street Stock Class Workbook, 1-7 Getting Your Cross Member Where You Want It, 1-14 Camaro Drag Link vs Metric Drag Link. The company offers a wide array of quality chassis components at reasonable prices. on rough race tracks. The roll of the chassis and the movement of the Panhard bar are the two components that influence the amount of steer in these systems. how the shortened bottom link pulls the bottom of the right side The bottom of the left side Increase All Shocks rebound and compression, but rebound should always be higher than compression. The system works well enough on the street, but not so well when it comes to hooking up at the drag strip, especially with big horsepower. Decrease Upper Control Arm Angle on the Rearend. Compare the measurements to specifications. Glosario de Geologia | PDF | Absorption Spectroscopy | Glacier clamp brackets and ahead of the axle can improve forward bite on The difference is, Id like to use the center post where the three link top link currently attaches to the chassis, and go out to brackets at the ends of the rear axle. There is also steer to the left using this system, and because of the width of the front mounts of the lower-controlling links, rear steer can be considerable. Rayburn of Rayburn Race Cars, a driver as well as a car builder, echoed much of what the other buiders had to say. NOTE: Adjustable . Welcome to J-AUTO! to enhance the forward bite. A & A Manufacturing makes a similar trailing arm mounting kit for racers using Ford 9 rear ends in GM Metric chassis (part No. The roll angles and vertical movement on a dirt car can be very pronounced. ance with altitude u p to the equilibrium line. Rear Lower Control Arms : Lower Rear Control Arms : Trailing Arms Set. Rethink Dirt: Advanced Dirt Track Theory | Hyper Racing (during acceleration) is quickened and forward bite is enhanced. 2,224. During chassis roll, indexing loads the right rear tire and unloads "Rear steer helps the driver get the rear end around on dry, slick tracks without having to break the rear tires loose," said Garrison. Also, how old are the shocks and have you ever had the valving checked? illustration 2B where the links are level. This trailing arm bracket use common offset slugs (sold separately) to allow you to change the amount of lead or trail in the rear end. cause a gas pedal push. It may not display this or other websites correctly. I was looking for more info on stock rear 4 link trailing arm angles. See the text for more information. Most of the Z-link systems utilize a spring mounting system that attaches the coilover spring to the front link. For a better experience, please enable JavaScript in your browser before proceeding. It comes with a locking bolt to tighten the bushing. The Z-link System Putting the stock "W" style suspension into a bind is your biggest enemy. at least 3" of rebound movement for the left We usually need to position the angle of the trailing arm so that the front mount is higher than the rear mount by roughly one third of the distance that the front mount will move down during cornering. Skip to main content. They are angled to fit GM Metric chassis and have four holes for racers to adjust their trailing arm position. Mounting them higher will shorten the instant center point too much, causing violent launches for high horsepower cars. Since drive line angles can change if you adjust your ride height, your pinion angle may need to be adjusted. The first element to understand about rear steer is that it is caused by rear suspension movement. AA-175-B) are constructed from stout 5/8-thick steel. You are using an out of date browser. This has been confirmed by studying data from onboard computer systems during testing that show shock travel amounts in the turns. suspension moves. A link length change of 1" or a link angle Wehrs Metric Trailing Arm Bolt. Wehrs Body Braces. Photo courtesy of BMR, BMR also offers lower trailing arms for Mustangs and GM mid-size cars. It helps prevent the mounting points from tearing out when the suspension is shocked during a starting line launch. With this design, lateral movement of the rear end causes rear steer. Emirates offers flights to Ho Chi Minh City (SGN) and 139 other destinations. Rayburn builds the swing-arm type of rear suspension. All driving train actually repalced with Moog components.. clamp brackets are used in front of the axle, axle wrap-up during about rear suspensions. Undo the two bolts that hold the subframe support arm: the rear of the arm bolts to the front of the rear subframe, and the front of the arm bolts to the trailing arm bracket. AA-621-A fits 3 axle tubes $14.95. the left rear tire and wedge is reduced (40 lbs to 80 lbs is typical!). 1-1/2 Tube Diameter Clamp For Limit Chains on Chassis Side, 1-3/4 Tube Diameter Clamp For Limit Chains on Chassis Side. This year marks the Outside Groove Director of Photographys 51st year of covering auto racing. bottom link arrangement of illustration 2C on the left side and the Depending on the angles of the trailing arms or bars, each rear wheel can be made to move to the front or rear. This condition may birdcage does lose some of its rearward movement because of the (PDF) Optimization of semi-trailing arm suspension for improving We never need our suspension to steer the rear end to the right of centerline on asphalt. Conversely anti-dive is used to describe how much a chassis nose dives under braking. The condition is referred to as However, keep in mind that chassis roll causes the link angles to Ben from AFCO Racing is an expert in multiple aspects of race cars including cooling and set up. These systems only steer to the left and have a limited amount of steer. You may be required to make chassis adjustments to loose roll steer tendency caused by the steep angles of the upper links. Custom Part is Non-Returnable and Non-Refundable. In Stock . Kit contains: (2) Rear upper control . Dave is the owner of Hammond Motorsports. Buy Traxxas 9530: Suspension Arm, Front (Right), Black From RCMA For The Best Deals In Australia, We Also Have Same Day Shipping On All Orders Placed Before 3PM Today! (Sold Individually). Metric Rear Suspension - Don Terrill's Speed-Talk I am going to raise the car next to achieve ideal front lower control arm angle (still to low for that) then corner balance and tweak from there. Rear Suspension - Medieval Chassis These arms fit 1978-87 GM G-body cars (Malibu, Monte Carlo, Regal, Cutlass, Grand Prix). They are: 1. 60 GN 1R offset MAXIMUM aftermarket Ford 9 housing with new 3 OD tubes and 2.5 GN hub snouts. These new Currie 31-spline axles feature press in studs in a 54 3/4 wheel bolt pattern, , thick heavy duty bearing retainer plates, and tapered wheel bearings pressed on. rear tire to move rearward (until the arm/s reach a level position) and Big Chevy Impala and Caprice 1980 to 1994 casting number is 369056 for right side and 396055 for left side and if you can not locate these I can send you info on other substitutes. Increase Left Rear Spring Rate. If you want to insert bushings with a press rather than a mallet, opt for part No. best for tight, flat race tracks or on any track where the chassis tends When we ran the SS my top mounts were tall, I had 17 deg or angle in the uppers. Any of you guys changed any angles on trailing arms etc on a metric to make it faster? Add to cart Details. If the upper links are shorter than 17", the lower KT-1B) sells for $96.00. Learn how your comment data is processed. In turn, that bite tends to move the car toward the left. We use the upper links on a 4-link suspension Increase the Angle of the Upper Trailing Arm. 60 MAXIMUM aftermarket Ford 9 housing with new 3 OD tubes and 2.5 GN hub snouts. Stock trailing arm kit, used for mounting Ford 9 in GM metric car. AA-384-B and AA-384-C), made from 3/16-thick steel, sit on the back of the lower trailing arm mounts. I'm not sure of the Task Force width . birdcage forward during chassis roll more than the longer links in There are four types of rear suspensions used in most dirt cars that are significant to study regarding rear steer. This will give you a lower rear roll center and aide side bite. Dave's Tip - "You should always tack weld them in place. Copyright Racelogic Chassis School 2023. Rear steer in this system is caused by chassis movement, which can . Replacing the worn out rear trailing arms and bushings will reduce wheel hop and axle wrap that occurs during racing. Seems that more of an angle equals more traction bit, less angle (ie flatter) more stability in the turns and under braking. With stock brackets on . This is accomplished by causing the right-rear wheel to move back and the left-rear wheel to move forward as the car rolls. We hope the information in this article, combined with your Another option are the double adjustable UMI upper and lowers available at Summit Racing (Part Number 402717-B or 402717-R).