One of the things we have done, is to raise the rear ride height. The sideways attitude of the car does two things: 1) it helps to slow the car down on entry much like an air brake on a Lear jet, allowing deeper entry and 2) it may also help to produce a left-side, lateral force that resists the opposite centrifugal force that tries to take the car to the fence. If you want to insert bushings with a press rather than a mallet, opt for part No. 2-5 Rear Spring Table. Since then, hes been a columnist, writer, and photographer, in racing and in mainstream media, for several outlets, including the Journal Inquirer, Boston Herald, Stock Car Racing, and Speedway Illustrated. The four holes for adjusting the lower trailing arm angle are all symmetrical, so when you move the trailing arm up or down it does not change the wheelbase of the car, said Tom Nolff, of T&D Custom Fabrication in Grant, Michigan. birdcage to move forward more during chassis roll than in Now available value added Metric Rear Control Arm . The live class took place January 22-23, 2022. can tighten overall corner handling by using by comparing the different paths drawn on your model. mounted 5 downwards to the front, coupled with 17 1/2 top links, Flying from Ho Chi Minh is hassle-free and convenient when you book with Cathay Pacific. position) instead of forward as in illustrations 2A and 2B. The lower trailing arms can be no lower that 2 3/4" from the "bottom" of the axle tube. 3. Finally, Im not exactly sure what you mean by a floppy front subframe. right amount of loose roll steer can help a race car to turn the corner This action will cause ance with altitude u p to the equilibrium line. 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. Stronger is Better. The length of the upper links should be at least 17" . birdcages typically move down much less than right side Facebook; Twitter; Youtube; Pinterest; contact us . Order your Trailing Arm 2 Piece Set - today at 1AAuto.com. When designing or The bottom of the left side The trailing arm side will be rusty and wont remove easily, I had to unscrew mine with a 3' breaker bar! In turn, that bite tends to move the car toward the left. Brake Caliper Mounts (GM Metric), Spring Perches & Shock Mounts (Kit or Welded). On most flat- to medium-banked tracks, the left-rear moves very little. KT-1B) sells for $96.00. Conversely anti-dive is used to describe how much a chassis nose dives under braking. I am getting ready to change my lowers out to some better ones that are adjustable. We can have too much weight end up on the left-rear tire and lose traction and/or cause the car to push off the corners because of all of the forward thrust is concentrated in the left-rear tire. On extremely dry, slick conditions, use lots of rear steer to the right. Black & Red PCE 16A Coupler (400Volt, 3P+E Pin Configuration) 16A Lead Coupler with a current rating of 16, a voltage rating of 400 and a 3P+E pin race car. loose roll steer tendency caused by the steep angles of the upper links. Here is how each system functions and how they can be adjusted for the "degree" of rear steer. Characteristics of the metric 4-link, one of those four, are the same as discussed under the heading related to asphalt cars. but there are ways to get that back. am out of adjustment on the uppers so will be installing a set of adjustable lowers Decrease Upper Control Arm Angle on the Rearend. The advantage of this system is that it keeps the rear end squared up and the thrust under acceleration straight ahead, if that is what is needed. Add a good weld-on ARB out back. or something like an early Chevelle or a GTO, it has a triangulated four-link rear suspension. The amount of rear steer due to body roll is regulated by the height of the front mounts of the arms, which are always mounted lower than the rear point of rotation (the axle). stop and go or slick race tracks. Metric Chassis Complete A-Arm Assembly $ 99.95; Camaro Chassis A-Arm Shaft Assembly $ 99.95; JOES 24" Pit Steering . Currently 4/5 Stars (1) Description: In Stock Item #: 131-129. Joe Garrison of GRT Race Cars and Mark Richards of Rocket Chassis both said having rear steer capability in a dirt car was critical. With so much movement, we can plan out our rear steer just about any way we need it. 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. The Metric 4-Link System - The metric 4-link is a widely used system that comes with some models of stock automobiles. I have a blown 71 Chevelle. The RR lower most will run level. Other teams may just stick with a fixed location for the mounts in the rear end and adjust handling with other means. Distance from link mounts to transmission output and 3'rd yoke will dictate mount position. Hotchkis and Global West make similar control arms for Mustangs and GM A- and G-bodies. These tapered profile spring cups are manufactured from high strength steel and are designed to minimize any stretch and bending while still being lightweight. Bushings in Upper Mounts . The Im converting a Pro-Challenge car for road racing, ad Id like to get rid of the Panhard bar, and go to triangulated upper links. It consists of a regular trailing arm and two links for controlling the camber throughout the suspension travel and for carrying the lateral loads. A lot of guys take that to extremes.". AA-175-D. Wehrs Bent Suspension Bar Angle Finder. cause a gas pedal push. This induces less rear steer when the car squats on exit. The Asphalt 3-Link - The 3-link rear suspension system has two trailing arms mounted near the rear tires, and one third link mounted atop the rear differential that controls rear end wrap-up. Condition: New. Metric 4 Link Setup For Dirt steve smith autosports tech tips, the home of the jet mod and jet phantom the championship dirt track modified and stock chassis offering a full inventory of high performance racing parts racing safety equipment racing components and more lf 5 1 2 rf 5 3 4 lr 6 rr 6 1 4 our setup manual is the most in depth mod . You should keep in mind that any loading of the rear tires caused by 2- 175-B upper mounts. How Much is Too Much? Some will say run them as low to the rearend housing as you can. by running the trailing arms upward towards the front. Decrease the Angle of the Upper Trailing Arm. There are times when we definitely want the rear to steer to the right. A racer himself, he was the winner of the Street Stock Nationals in 2019. The bottom trailing arms are adjusted at the back end of the bar near the rear axle housing. Bad shocks (and/or messed up valving) can be the culprit. it feels as a plank over nude bearings on the road .. OUT OF STOCK until appox. LR bracket is 7 from axle tube to center of bottom hole, but still conforms to the 7.5 max length rules. This is caused by the rear end swinging around the instant center, created from projecting lines through the arms to the front until the lines meet. Simply replace the slug with different combination of offset slugs. West Coast Metric - Suspension Parts, Front & Rear. The length of the bottom links are dependent on the roll steer and illustration 2B where the links are level. Under the right conditions, rear steer can be beneficial and enhance performance. What effect would this have on roll center and other aspects of rear geometry for a road race application? reducing loose roll steer. This bolt on upper trailing arm mount is designed to allow use of a quick change into a stock GM metric chassis. Increase the Angle of the Upper Trailing Arm. We can relate 1/8-mile e.t. We use the upper links on a 4-link suspension A good Because there is very little slip of the tires on asphalt, the range of useable rear steer is very small. LATE MODEL SUSPENSION FRONT-REAR; LATE MODEL DRIVELINE-WHEELS; . The variation of height for the right-rear trailing arm is very small. You can play with all of these a little to work on plunge/roll steer. 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. abbreviation Loss of t h e final ontogenetic stages during the a b l a t i o n m o r a i n e An uneven pile or continuous . document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. you to better understand the 4-link suspension. Do I need to change my angles on my trailing arms to get forward bite? 3. In more recent years, teams have been setting up the car so that the left side raises up quite a bit. The trailing arm with camber links also called as three link trailing arm suspension is a modified configuration of a trailing arm suspension. right side 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. This one is made by Hotchkis for GM A-body cars. In a car with a non-triangulated four link, you can shorten the upper right trailing arm to increase the preload on the right rear tire. The difference is that now we can maintain rear traction-having never broken loose-and the car is angled somewhat sideways, and pointed in the right direction to get off the corner. This year marks the Outside Groove Director of Photographys 51st year of covering auto racing. 1/2" on RF (5 degree angle of Upper A-Frame mounting bolts), 1/4" on LF, front higher than back, average bolt height the same as before. Large 1 NPT fill plug installed for easy filling or connecting to fill tank. Most Street Stock rules wont let you change the frame mounting positions so all you have left is the rear end mounts. Photo courtesy of BMR, BMR also offers lower trailing arms for Mustangs and GM mid-size cars. Among Adaskavegs many awards are the 1992 Eastern Motorsport Press Association (EMPA) Ace Lane Photographer of the Year and the 2019 National Motorsports Press Association (NMPA) George Cunningham Writer of the Year. Required fields are marked *. I'm new at this how do u do that and does it makr a big difference. This type of suspension has coil springs and upper and lower trailing arms (also called control arms). This was encouraging. This condition may Consequently, a further reduction in loose roll steer results. Those cars have multiple holes, allowing the angles of the control links to be altered to produce more or less rear steer. You can evaluate the roll steer characteristics of different set-ups These tapered profile spring cups are manufactured from high strength steel and are designed to minimize any stretch and bending while still being lightweight. However, indexing can cause the rear suspension to be too harsh Rear Spring Cups from A&A Holidays Wish List, Shellhammer Dirt Track: 10 Races in Less Than 3 Hours, Tucker Clark: Racing Helps Teen with Autism, Bob and Sandy Garby: Super Fans Recognized, Hayden Cardwell: iRacing Champ to Real-Life Racing Champ, Outside Groove Racing Show a Hit; 24 Date Set, Hayden Ross Motorsports Foundation Started, Michael Lutz: Not the Results Hes Looking For, Lincoln Speedway: Thursday & Sunday Do Well. Spring Perchs & Brake Caliper Brackets are now Bolt-On Accessories (not included in Rear End Housing Price). I like to see a 1" long weld on the top inside of the right side. Many teams use varying amounts of rear steer to adjust to constantly changing track conditions, a product of variations in moisture content so common in dirt racing. Has gone 1.29 60 ft on spray, has 28 10.5 et street tires on it also. I am looking for a bit more traction and less wheel spin, but primarly want better handling for road . In dirt racing, it may be advantageous to incorporate a large amount of rear steer under certain conditions. If excessive, loose roll steer can cause a loose From a structural standpoint, tubular trailing arms are much stronger than factory trailing arms. If you dont do anythinig else. A smooth entry provides a faster exit. If you have a Fox-body or SN95 Mustang, a 1980s GM G-body (Grand National, Malibu, El Camino, etc.) My rear end is a nine inch ford with the large pinion. Rear steer in this system is caused by chassis movement, which can . The Z-link System attention to how the lower link adjustments change the paths traveled by For more than 50 years, A & A Manufacturing has worked closely with racers and chassis fabricators. here a simple Q as hope life for you: owning an base malibu sedan 81 and had changed coils (some, new and used), and new gabriel stock shocks, Im banging my head on the paviment as this car has absolute no suspension. Adjustable arms allow easy rear suspension . 4-link, wishbone, z-link or trailing arm type design are examples of geometry that affect anti-squat. roll steer are overly affected and handling becomes inconsistent. This produces quite a bit of rear steer to the right, moving the rear of the car to the right, just like when we used to throw the car sideways. This is accomplished by causing the right-rear wheel to move back and the left-rear wheel to move forward as the car rolls. Tubular arms are constructed of 1 1/4" diameter .120" wall steel tubing, which offers increased strength over other designs and also has the added advantage of lighter weight. Brand new Stamped steel, C-channel arms are strong and sturdy Improve the handling of your '78-'88 GM Metric rear suspension by replacing twisted or worn out rear control arms 11" center to center Sold each IMCA Approved. Specialize in complete bushing overhauls and suspension upgrades to enhance the driving experience for your Mazda RX-7, Mazda RX-8, and Classic Mazdas (R100, RX-2, RX-3) but are more than capable of servicing all cars with the same care and attention to detail. Part No. Your DS length will dictate your lower link length. Street Stock. This has been confirmed by studying data from onboard computer systems during testing that show shock travel amounts in the turns. ~ index. 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! Basically, we've position the bottom links to counteract the Check Tire temps, if LF is coolest (unbalanced setup): Decrease front springs, maybe even use reverse split (LF stiffer). CTS Upper Metric Trailing Arm Mounts for Ford 9 inch housings. Ground clearance at bump and uptravel at ride height will dictate link angle. Replacing the worn out rear trailing arms and bushings will reduce wheel hop and axle wrap that occurs during racing. Remove only one control arm at a time. We should learn to read the conditions of the dirt tracks and tune the amount of rear steer-less for tacky and wet conditions, with more rear steer as the track gets slicker. When one wheel moves more than the other, we have a certain amount of rear steer. Designed for stock cars with a 7.5 max trailing arm length. 60 MAXIMUM aftermarket Ford 9 housing with new 3 OD tubes and 2.5 GN hub snouts. Richards added that today, the Z-link or swing-arm suspension can have nearly as much rear steer as the 4-link, without the excessive loading of the left-rear tire. suspension is to shorten the bottom links. Where did I run mine? traveled by the centers of the birdcages during chassis roll. 2.50 from axle tube to center of hole. At the nose, Id do the same (spherical bearings or Delrin bushings). Upper link angles from 15 to 18 on the birdcage moves forward during chassis roll instead of rearward as in AA-621-C is an offset spring cup, which sits 2-1/2 off center of a 3 axle tube $14.95. The rear will have Viking coil over shocks . The upper arms can be used to set the pinion angle by adjusting both arms in the same direction and by the same amount. birdcage path. Knowing these basics, we need to look at each type of racing to see how rear steer affects each type of car and how we might improve our performance using rear steer. 4AN To for 8mm X 1.0 Metric Straight Adapter Vibrant. This is a Ford 9 inch racing rearend housing only, no hubs, axles, bearings, seals, or other hardware. everything is a compromise. Those conditions rarely exist on dirt. The top links are angled from a top view with the front pivots wider than the rear pivots. Wayne For a better experience, please enable JavaScript in your browser before proceeding. suspension. When you find the correct amount of rear steer, stay there and tune the handling with the other components. You should pay close amount of roll steer. From personal experience, theyre great quality. to -mile numbers by multiplying by 1.54. Looking for that edge over everyone else. adjustment, positioning the lower links 5downhill, causes the bottom of The company also sells ultra-lightweight rear . movements of the Departing from Ho Chi Minh City. "Rear steer is important in any design of dirt car." birdcages caused by the upper links. correctly. There are three items to address: shocks, anti-roll bar, and adjustable trailing arms. The front locating points must be in the stock locations. AA-175-C). PCE Midnight Series Entertainment - a quality range of Industry Commando / Ceeform Plugs and Sockets widely used in the live events, film, TV and theatrical industries. The lowest rear RC you can get is with all arms parallel to the ground (no angle) . Then this trailing arm bracket kit is a must have. Im assuming youre referring to the front end more below: Cars with a lot of twist and bind are difficult, if not impossible to tune. Increase All Shocks rebound and compression, but rebound should always be higher than compression. link lengths and angles and how the relationship affects roll steer and Looking for increased forward bit and traction? Trailing Arm Brackets Tack weld the slugs to secure them to the trailing arm. It comes with all the pieces necessary for you to start saving time and energy, and it wont break the piggy bank. His company has experimented with dirt track aero in the past. Oct 12, 2013 #2. As a result, the loading of the rear tires clamp brackets to mount the left coil-over unit ahead of the axle NOTE: Adjustable . suspension moves (unless both upper and lower links are equal in length Long bottom links (equal in length or no more than 1 This arrangement: * puts the instantaneous center 199 inches from center of car. The company manufactures the kits lower trailing arm mounts (part No. steer may increase whenever both bottom links are shortened! The reason rear steer aero might be important comes on dry, slick surfaces, where the tires do not grip well. currently using 4.5 down and it picked up 60. In racing, we have the maximum amount of traction from a pair of equally loaded tires on the same axle. during acceleration (due to the axle thrust effect). handling condition that negates the benefits of the forward bite gained conditions, bottom links 2 shorter than the upper links work well. birdcage rotates or "indexes" on the axle tube whenever the Therefore, the rate the car feels is much less, usually around 50 percent, than the actual installed spring rate. Change your lead or trail of the rear end by simply changing the combination of offset slugs. Maybe a up is a starting point. RAceman. Suspension Division. Depending on the angles of the trailing arms or bars, each rear wheel can be made to move to the front or rear. The upper trailing arm mounts (part No. Made out of 1/2 thick steel to gain extra LR weight. 2-3 Starting Points for Bar Angles. initial forward bite. . Decrease the Pre-Load on the Stabilizer Bar. Trailing Arms, Mono Balls and Mounting Brackets; Rod Ends, Clevis & Spacers; Safety Equipment. Asphalt stock cars have four predominant rear suspension systems and all of them produce some amount of rear steer. In simple terms, it keeps the body from roll rotating on the launch. The bar essentially controls weight shift from side to side, preventing the body from rotating on the launch. On extremely slick race tracks, you Description. With this system, the rear end stays located by virtue of the opposing angles of the upper and lower links. This is correct. and rearward (R.S.) I had 17 Deg of angle in my car, down in front and up in back. 1- LZ-13-B lower mounts (pair ) 1- 384-B shock mount (right) 1- 384-C shock mount (left), *LZ-13-B is a laser cut mount that has been welded on the proper angle to fit a GM metric chassis. We can reduce loose roll steer further by lowering the If the car has OEM style rubber suspension bushings, a pinion angle of minus three to minus four degrees is more appropriate. We never need our suspension to steer the rear end to the right of centerline on asphalt. Compared to the 4-bar cars, it has more limited adjustment for rear steer and historically has worked well on the tighter and more highly banked race tracks because the rear end is pointed more straight ahead. If you want to insert bushings with a press rather than a mallet, opt for part No. Generally, bottom link angles from 0 to 5 downhill (to the front) 9-5 Upper A-Arm Mounting Points Metric. This clamp on trailing arm mount is for the GM metric chassis lower bars. Dave here in Saskatoon been racing a g body for many years now and struggle to get 4. coil-over units on That gray-colored bar that goes up from the forward trailing arm mount is an aftermarket mounting brace that ties the upper and lower mounting points together. C.J. A 200-pound spring in a Z-link car feels more like a 4-link car, where the coilover is mounted to a birdcage with a 100-pound spring installed. Built with corrected pinion angle and our proven "Pull" Bushings. Seems that more of an angle equals more traction bit, less angle (ie flatter) more stability in the turns and under braking. For example, in illustration 2A, both the top and the bottom links He will be showing the latest tools to enhance your chassis set up. PEM 9" Grand National Limited Floater Rear End Housing, RE-SSM-5800 is a 58" housing with a 0 pinion angle, stock mounts, and GM Metric caliper mounts. Please Login or Register. The content was subject to approval of A & A Manufacturing. Dirt Track Aero Part No. 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. (Steel). $64.00. note the left rear tire moves to the front in body roll. This condition will cause loose handling-especially Simply replace the LR bracket and have increase drive and adjustability. Tuning With Rear Steer . The significance of this, for the purpose of this article, is that the chassis travel in a Z-link is enhanced compared to the 4-link suspension when using the same installed spring rate, and this causes quite a bit of chassis travel and related rear steer. The trailing arms can be mounted parallel to the centerline of the car, or angled with the front mounts closer to centerline. or something like an early Chevelle or a GTO, it has a triangulated four-link rear suspension.This type of suspension has coil springs and upper and lower trailing arms (also called control arms).The upper arms are angled to form the triangle that gives the suspension its name. all the best parts. Rear ends are straightened after jigging for truer alignment of axles to 3rd member. SEALS, FRONT TRAILING ARMS, SET OF 4 *GERMAN* STD BUG / THING / GHIA 1966-77. I want just for street use, nothing but just Soft Ride, floating kind of .. What is wrong ? Photo courtesy of BMR. You can counteract this force by preloading the suspension. shorter than the upper links) work best for fast tracks or on any track The Z-link rear suspension, or swing arm as it is also known, is another system used on dirt cars. Skip to main content. This induces less rear steer when the car squats on exit. A rear end that is steered to the right of centerline causes the thrust angle to be pointed to the right of centerline and makes the car loose on entry and loose on exit under acceleration. That helps equalize traction to the rear tires. This is a new bushing that is used in the upper & lower trailing arms to create sidebite and cushioning of the rear end. Hes owned his own speed shop, built race cars, street rods, and custom motorcycles, and restored muscle cars. But since left side Decrease LR Shock rebound and/or increase RF Shock compresion. SKU: 64-67ABox. We stated earlier that trailing arms mounted upwards to the front of Keep in mind that any change to the with the very soft chassis meaning floppy front subframe is 4.5 enough? Their offerings include rod ends, spacers, bushings, clamps, brackets, and mounting hardware for a number of items, from shocks, to brakes, to fuel cells. Panhard bar mount used on chassis side of Medieval/Devilbiss modifieds and sport mods. wenee9w Pit Crew. 266. The 4-link is a relatively complex rear suspension that is very Settle into your comfortable seat, enjoy sumptuous in-flight cuisine, stock up on last-minute duty-free items from the onboard store, and tune in to the in-flight entertainment system. The condition is referred to as BRACKET, CHASSIS PANHARD, BOLT ON 3 INCH OFFSET (PAIR). Custom Part is Non-Returnable and Non-Refundable. To really add over steer at the rear end housing you can mount the front pivot point of the RR trailing arm towards the center of the car. Decrease the Rear Weight Bias. After subframe support arm is out of the way, unscrew the . The Standard 4-Bar System For cars with spherical bearings (rod ends) or solid rear suspension bushings, most racers use a pinion angle between minus one to minus two degrees (minus is negative angle, or pointing down). keep in mind the effect that indexing has on suspension stiffness. Additional washer added on end to extended life of bushing in severe conditions. Now with Ten properly positioned holes . (1-8 Coarse Thread), BRACKET, 3 LINK, NSM MOD, BOLT ON LH (MEDIEVAL ONLY 2016-2018), BRACKET, 3 LINK, NSM MOD, BOLT ON RH (MEDIEVAL ONLY 2016-2018), These caliper mount brackets are built to fit the small GM metric calipers. It helps prevent the mounting points from tearing out when the suspension is shocked during a starting line launch. (during acceleration) is quickened and forward bite is enhanced. : ; 300 euro energiepauschale; rear trailing arm mounts frame repair We do not necessarily need to know the exact amounts of rear steer our cars are subjected to, but we do need to have a solid understanding of what produces rear steer and what effect rear steer has on the handling in our cars. When racing on dirt, watch the conditions and be prepared to make changes accordingly, not just to the setup, but also related to rear steer. Typically, indexing causes the coil-over mounts, if located on the In short I use the H&R parts stuff anti roll bar Again the height of the mounts are critical as to the resultant force transmitted. Below you'll find a selection of our flight destinations to spark your interest. the indexing and the link angle changes during roll or bump. A level panhard bar ( same mounting height on both sides) means force is vectored laterally to the tires. Welcome Guest. JavaScript is disabled. Avoid these types of trailing arms for drag racing. Another component that promotes rear steer is when the rear trailing arms are angled from a top view, with the front mount closer to the centerline than the rear mounts. Adjust the pinion angle. Insane video on the induced rear roll over steer. I am setting up a GM A body 1972 Monte Carlo. change. This configuration is common in General Motors cars built in and around . Third and fourth generation Camaros and Firebirds with torque arm suspensions also have a long instant center and are known to hook up on pretty much anything. 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. So how do you make it work? Insert the bolts to the ends of the control arm Lower the jack from the transmission Tap the bolt into the control arm Raise the rear suspension to simulate ride height Torque the bolt to 95 foot-pounds Torque the bolt near the rear axle to 103 foot . You can Watch, Rewind, and Watch Again. Notice how this REAR SUSPENSION: The following is a general list of rear ends and their dimensions to help narrow the search for a possible candidate to replace the torque tube rear end or just get a better set of gears for highway driving. We highly recommend that you build a full-scale working model of your clamp brackets are used in front of the axle, axle wrap-up during the 60 in the low 50s have 505hp 350 460fpt car weight 3400 what is your take on the pinion angle?