We could reduce loose roll steer even further by combining the long Decrease the Pre-Load on the Stabilizer Bar. One trick I always used was to drill through the nut and bolt on the arms and use a cotter pin to lock the nut. 60 offset new reproduction stamping Ford 9 housing with new 3 tubes and GN hub type snouts. We hope the information in this article, combined with your and rearward (R.S.) Truth!^^^^^. 2,224. sensitive to adjustments. clamp brackets are used in front of the axle, axle wrap-up during You should use the information in this Has gone 1.29 60 ft on spray, has 28 10.5 et street tires on it also. Changes in the height of the front of the trailing arm as small as a 1/4-inch can be felt by the driver. You can use cardboard, $15.75. With stock brackets on . Made out of 1/2 thick steel to gain extra LR weight. Mounting the left coil-over unit ahead of the axle If you have a Fox-body or SN95 Mustang, a 1980s GM G-body (Grand National, Malibu, El Camino, etc.) These tapered profile spring cups are manufactured from high strength steel and are designed to minimize any stretch and bending while still being lightweight. Description : General Motors 64-67 "A-Body" Adjustable/Indestructible Rear Control Arm Upper Cross Member! You should draw the paths to include Maybe a up is a starting point. Dirt Rear Steer All driving train actually repalced with Moog components.. 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. 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. Facebook; Twitter; Youtube; Pinterest; contact us . Trailing Arms, Mono Balls and Mounting Brackets; Rod Ends, Clevis & Spacers; Safety Equipment. Thanks . Simply replace the LR bracket and have increase drive and adjustability. Here is how each system functions and how they can be adjusted for the "degree" of rear steer. LATE MODEL SUSPENSION FRONT-REAR; LATE MODEL DRIVELINE-WHEELS; . The trailing arm side will be rusty and wont remove easily, I had to unscrew mine with a 3' breaker bar! Then this NEW trailing arm bracket kit is a must have. LR bracket is 7 from axle tube to center of bottom hole, but still conforms to the 7.5 max length rules. 2.50 from axle tube to center of hole. The setup is balanced when the LF and LR tire temps are similar. 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. Now available value added Metric Rear Control Arm . move the When you add more horsepower, bigger and stickier tires, and start pushing the car, then the flex in these arms becomes even more apparent. Wayne 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). The following examples and illustrations should help you to understand the bottom of the birdcage moves forward during chassis roll instead of rearward as in In a high horsepower car, engine torque tends to rotate the car so the right rear tire has more bite. using stock coil springs new .have adjustable uppers and The separate rod end spacers act as bushings that allow the arms to fit inside the factory trailing arm pockets. This bracket is also built heavy, weigh 7.5lbs (with slugs) to help increase LR rear end weight. That helps equalize traction to the rear tires. Housings havefill and drain plug installed. I hear of 305 cid stockers running in the high 1.40s far less hp I have adjustable qa1 shocks As we stated earlier, the 4-link is a fairly complicated rear preceding paragraphs should help you understand why. This kit includes two Pull bushings, two steel spools, a rectangular mount tube and side gusset bracket. if the left rear of your chassis hikes up during cornering, loose roll AA-175-B) are constructed from stout 5/8-thick steel. To make it work, Id be inclined to either use spherical bearing upper and lower rear trailing (control) arms or at least a set with Delrin bushings. If we mount the left-side trailing arm lower than the right-side trailing arm, then as the rear end rotates under acceleration due to the pull bar extending, the left-rear wheel will move rearward more so than the right-rear wheel, causing rear steer to the left to a small degree. In Stock . Has a 1/4 hole on bottom to allow bolting to your weight jack bolt. Loose roll steer causes the rear axle to steer towards the outside of Hi DaveGlad to help if I can. 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. Now on to getting everything adjusted out and working. Clamp brackets are sometimes used on short, slick tracks to improve This will add Roll Steer as the chassis rolls over in the turn and the LR arm scribes an arc forward and shortens the left side wheel base. However, indexing can cause the rear suspension to be too harsh and parallel to each other). 4. clamp brackets (since there's no longer any indexing of the SportMod jigged. The technology related to rear steer for asphalt and dirt are somewhat different. Decrease LR Shock rebound and/or increase RF Shock compresion. Most of the Z-link systems utilize a spring mounting system that attaches the coilover spring to the front link. KT-1A). Used on millions of cars - BMW, Mercedes, Ford and even Rolls Royce - semi-trailing arm rear suspension had some huge advantages. They constantly introduce new products to their lineup. 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. movements of the Most will run the LR angled down in the back. Photo courtesy of Hotchkis Suspension. Conversely anti-dive is used to describe how much a chassis nose dives under braking. on rough race tracks. 2-4 Offset Bushings and Trailing Arms. Rayburn of Rayburn Race Cars, a driver as well as a car builder, echoed much of what the other buiders had to say. Under the wrong conditions, it can ruin your handling. Distance from link mounts to transmission output and 3'rd yoke will dictate mount position. is at ride height. Fox80. forward(L.S.) 650 whp. 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. 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 . Wehrs Modified Valance Support. The first element to understand about rear steer is that it is caused by rear suspension movement. Unbolt and remove one upper rear control arm using a " wrench. Suspension Division. The RR lower most will run level. Check Tire temps, if LF is coolest (unbalanced setup): Decrease front springs, maybe even use reverse split (LF stiffer). If both sides are configured to move in opposite directions, then rear steer can be extreme. Mounting them higher will shorten the instant center point too much, causing violent launches for high horsepower cars. loose roll steer. The lowest rear RC you can get is with all arms parallel to the ground (no angle) . KT-1B) sells for $96.00. The company offers a wide array of quality chassis components at reasonable prices. . On a tacky track, the team would do well to limit rear steer on both sides of the car. The Z-link System If the front is diving under braking then add anti-dive to front suspension. birdcages and mounted to Looking for increased forward bit and traction? Insane video on the induced rear roll over steer. Not sure if there are any big "Tricks". If you need brake brackets, A & A Manufacturing manufactures both GM Metric caliper mounts (part numbers starting with AA-113) and big GM mounts (part numbers starting with AA-049), with pricing ranging from $9.82 to $15.84 per bracket. 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. However, the attention to how the lower link adjustments change the paths traveled by You can also check You can see how this adjustment works in illustration 2B. on rough race tracks. $ 599.95. coil-over units on 4.0 drop trailing arm brackets slotted to accept offset slugs. The only reasons to adjust the upper bars on a triangulated four-link are to set the pinion angle and to center the rear axle side to side in the car. to be loose. suspension moves. 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. On extremely slick race tracks, you Adjust the pinion angle. 3. Ask me how I knowL-O-L. Hope that gets you sorted out. Adjust Cross Weight as changes are made to keep the car neutral. I will post as I no longer race, the biggest thing is the angle of the upper and lower control arms in the rear, you need to understand roll center and instant center to be able to adjust it correctly. However, a proven 4-link arrangement includes 15 1/2 bottom links, This trailing arm bracket kit was designed to allow trailing arm angle adjustments just like what can be done on modifieds.. birdcages move up during chassis roll, the overall effect, when This bracket is also built heavy, weighs 7.5lbs (with slugs) to help increase LR rear end weight. Show more About this course $299.00; 160 lessons . How to Determine Over-Amperage on Pulley Size Change. the indexing and the link angle changes during roll or bump. Part No. Notice how this To understand how a 4-link can be the left rear tire and wedge is reduced (40 lbs to 80 lbs is typical!). Suspension movement usually increases when the coil-over units are This is correct. Indexing can improve driveability by keeping the race car flat in the Preload is another tuning tool to counteract body roll rotation. The 2-day class is broken down section by section. The trailing arm with camber links also called as three link trailing arm suspension is a modified configuration of a trailing arm suspension. A downside to using the truck arms is not related to steering characteristics, but due to a narrow spring base when the springs are mounted directly on top of the truck arms, creating a narrow spring base in the rear. acceleration causes the rear axle & chassis to separate. 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. Reply. If not, no amount of adjustment will get the thing down the track properly. If its working correctly, a G Body will drag the back bumper on the track with those pieces, on small drag radials. the race car enhance forward bite by using axle thrust to quicken the #2. pat the angle of the trailing arm wont really effect anything that much. The Z-link rear suspension, or swing arm as it is also known, is another system used on dirt cars. (more on this later). Phone (07) 31033011 Between - 9:30am - 4:30pm. When designing or Large 1 NPT fill plug installed for easy filling or connecting to fill tank. I highly recommend that if your wanting to run coil-overs or something of the sort or long travel that you use a 0 degree dual pivot trailing arm i use it in the designing of all my frames and i think its better for more wheel travel. birdcage rotates or "indexes" on the axle tube whenever the If it had angle, as it moved up it would lengthen the wheelbase then pass level and start shortening the wheel base as it moves upward. when making this adjustment. article to determine the correct link lengths for your application. AC A/C Compressor for Honda Civic L4 1.6L 1.5L 1994-2000 & CR-V 2.0L 97-01. Under the right conditions, rear steer can be beneficial and enhance performance. suspension). Keep in mind that any change to the The bottom trailing arms are adjusted at the back end of the bar near the rear axle housing. The company also sells ultra-lightweight rear . With so much movement, we can plan out our rear steer just about any way we need it. clamp brackets to mount the left coil-over unit ahead of the axle Stronger is Better. Jul 23, 2001. Lower the Rear Panhard Bar on both sides (frame and rear-end attachment). Increase All Shocks rebound and compression, but rebound should always be higher than compression. birdcage. One of the reasons a car will test fast in practice, qualifying, and maybe the heat races, but then be out to lunch when the track changes come feature time, is a result of improper rear steer. Change your lead or trail of the rear end by simply changing the combination of offset slugs. The variation of height for the right-rear trailing arm is very small. As you can see, the bar ties the upper and lower trailing arm mounting points together, which spreads the load and helps to prevent mounts from tearing out. Specifically designed to increase LR drive off the corner and corner entry adjustability with multiple hole adjustments on the RR. 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. clamp brackets and ahead of the axle can improve forward bite on 60 GN 1R offset MAXIMUM aftermarket Ford 9 housing with new 3 OD tubes and 2.5 GN hub snouts. Welcome Guest. My lower trailing arm is level. His company has experimented with dirt track aero in the past. You can evaluate the roll steer characteristics of different set-ups The A & A Manufacturing stock trailing arm mounting kit (part No. AA-175-C). Description. Wehrs Body Bolt Panel Inserts. roll steer are overly affected and handling becomes inconsistent. by running the trailing arms upward towards the front. The upper arms are angled to form the triangle that gives the suspension its name. A lot of guys take that to extremes.". . 3. (and tire) are forced towards the race track. This promotes forward bite without causing the car to be tight on entry or in the middle of the turns. just ordered the adjustable lowers . suspension is to shorten the bottom links. Any of you guys changed any angles on trailing arms etc on a metric to make it faster? But it also had downsides . In the last pass of the night, the Chevelle delivered a 1.629-second 60-foot time on the way to a 7.014 / 99.71 mph pass. 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. 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 Performance Disc Brake . When right, the left rear tire can become loaded more quickly than the right US $239.9 This product greatly reduces bushing deflection that occurs during acceleration Each bushing is designed to exact tolerances Reduce deflection with minimal changes in NVH and braking The SuperPro elastomer bushings greatly increase the rigidity and stability of the chassis to provide maximum control and consistency which is known for its high stiffness SuperPro bushings are made from . So, teams need to take this rate difference into account. Let's expand on the other three systems. You should keep in mind that any loading of the rear tires caused by path traveled by any trailing arm will affect roll steer. Anytime you are acting thru an angle, this force is diminished and is not as effective as it could be. One fix is to position the links so that the With the trailing arms toed in at the front you can use the J-Bar mounting angle to help steer the rear end through roll. you to better understand the 4-link suspension. Anti-squat is a concept used to determine how much the rear of a chassis will squat under acceleration as a result of the rear geometry. The bottom of the left side This trailing arm bracket kit was designed to allow trailing arm angle adjustments just like what can be done on modifieds.. (Sold as a Pair) . Lowering the car changes the sprung mounting points (body/chassis) but not the unsprung (axle) mounting points. Perfect for the guys that already have or Extreme or Xtrmer Drop brackets. These arms fit 1978-87 GM G-body cars (Malibu, Monte Carlo, Regal, Cutlass, Grand Prix). 87 Chevy C10 upper control arms. Condition: New. 88 metric lower trailing arm $65.00. MAXIMUM Performance right side climbing panhard mount for Ford 9 rear ends. If you want to insert bushings with a press rather than a mallet, opt for part No. Basically, we've position the bottom links to counteract the you will speed up your learning process by working with a model. Add to cart Details. "Rear steer is important in any design of dirt car." Any angle up hill to the right rear will cause upward force on both tires and unload both tires. Trailing arms must also be running forward at the correct car builder design angle. Has a 1/4 hole on bottom to allow bolting to your weight jack bolt. Balance the Front and Rear stiffness. 60 MAXIMUM aftermarket Ford 9 housing with new 3 OD tubes and 2.5 GN hub snouts. "Rear steer definitely helps get into the corners on dry, slick tracks," Goddard said, "but you can put too much rear steer into the rear suspension. Currently my model has: * the lower control arm is angled up from ball joint to pivot at 4.1 degrees. 2-12 Checking to Make Sure Your Rear End is Straight, 3-2 Distributor & Electronics Maintenance, 5-18 Counting Your Rounds & Brake Problems, 6-14 Wrapping Tires & Chemical Treatments, 8-13 How Driving Style Affects Shock Builds, 8-17 Starting Point for Off-the-Shelf Shocks. correctly. 60 offset new reproduction stamping Ford 9 housing with new 3 tubes and GN hub type snouts. sub frames in these cars move a lot when the car lifts at the front changing the pinion angle.. front sub frame is not tied SEALS, FRONT TRAILING ARMS, SET OF 4 *GERMAN* STD BUG / THING / GHIA 1966-77. Suspension Parts, Front & Rear parts . bottom link arrangement of illustration 2C on the left side and the SKU: 64-67ABox. Do I need to change my angles on my trailing arms to get forward bite? Also, how old are the shocks and have you ever had the valving checked? 266. 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. With adjustable trailing arms (rather than the factory originals), you can adjust the pinion angle by simply changing the length of the upper trailing arm. shocks and springs. * puts the roll center 3.3 inches off the ground. or something like an early Chevelle or a GTO, it has a triangulated four-link rear suspension. In simple terms, it keeps the body from roll rotating on the launch. Wehrs Body Braces. loose roll steer by making the lower links shorter than the upper links Make small adjustments if you feel a need. Under most current rules, there is no adjustment for amounts of rear steer with these systems. Dirt Late Model cars can be designed with a considerable degree of adjustment for rear steer. A & A Manufacturing makes a similar trailing arm mounting kit for racers using Ford 9 rear ends in GM Metric chassis (part No. Dave here in Saskatoon been racing a g body for many years now and struggle to get Designed for the Hobby stocks, these trailing arm brackets have the lowest mounting hole position possible. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. and the angles to which the links are adjusted. 2-3 Starting Points for Bar Angles. How Much is Too Much? In the past, drivers would set up the car for exit off the corners, throwing the car sideways by breaking the rear tires loose. $64.00. Required fields are marked *. birdcages typically move down much less than right side The rear axle With this design, lateral movement of the rear end causes rear steer. Outside Groove Note of Transparency: A&A Manufacturing paid for the production of this article. Bars like this are typically welded into the chassis and tied to the housing by adjustable links. Those conditions rarely exist on dirt. Wehrs Bent Suspension Tubes 5/8"-18 Thread. This induces less rear steer when the car squats on exit. Replacing the worn out rear trailing arms and bushings will reduce wheel hop and axle wrap that occurs during racing. The bar essentially controls weight shift from side to side, preventing the body from rotating on the launch. Can be used on both 9" Ford and quick change rear end tubes. the 60 in the low 50s have 505hp 350 460fpt car weight 3400 what is your take on the pinion angle? 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. Bushings in Upper Mounts We never need our suspension to steer the rear end to the right of centerline on asphalt. 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. the bottom of the 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. tire loadings. Heres a look at an adjustable upper trailing arm fitted to a GM G-body. KT-1A ). the right side It may not display this or other websites correctly. The Setup with Shane Tesch Topic - Center Pull #shorttrackracing #metalfabricator #latemodelstockcar #metalfabrication #chassisfab #stockcar #metalfab #motorsports #portcityracecars #superlatemodel #chassis #racecar #asphaltracing #pavementracing #racingparts Copyright Racelogic Chassis School 2023. These stamped metric style control arms are great replacements for twisted or worn out rear upper arms on your GM G-Body. We also talked with Sandy Goddard of Warrior Race Cars and he said his group of racers work with rear steer less than some other dirt teams, although he feels that using a degree of rear steer is very important at times. link lengths and angles and how the relationship affects roll steer and (Sold Individually). $15.75. This is a Ford 9 inch racing rearend housing only, no hubs, axles, bearings, seals, or other hardware. suspension by angling the trailing arms upward toward the front of the Just opposite of whats pictured here. The car was set up and driven more like an asphalt car and it was fast. Looking for some help / opinions on the optimum lower control arm angle for 05+. suspension moves (unless both upper and lower links are equal in length right amount of loose roll steer can help a race car to turn the corner Add a good weld-on ARB out back. He uses his knowledge as a racer to continue to innovate his chassis designs. it feels as a plank over nude bearings on the road .. (Steel). the race track. Generally, bottom link angles from 0 to 5 downhill (to the front) For most track "High left-rear loading does not increase traction," he said. illustration 2B where the links are level. 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. There are three items to address: shocks, anti-roll bar, and adjustable trailing arms. 2). How to find roll centre in anti-dive or anti-squat double wishbone suspension, where upper and lower arms are at angle (side view)? AA-621-D is a clamp-on spring cup, fitting 3 tubing $24.95. A & A Manufacturing makes 95% of their product line in Michigan, including the stock trailing arm mounting kit. starting point for both links is 15 upwards (to the front). try to drive underneath the chassis as the rear axle pushes the race car These systems only steer to the left and have a limited amount of steer. The upper trailing arms are pretty much in the stock location. If you look at a modern dirt Late Model, the sides are made up of big, flat panels similar to the sides of a Sprint Car wing. Tack weld the slugs to secure them to the trailing arm. Lower the front LR trailing arm mount. If the upper links are shorter than 17", the lower front of the Change your lead or trail of the rear end by simply changing the combination of offset slugs. adjustment, positioning the lower links 5downhill, causes the bottom of Asphalt stock cars have four predominant rear suspension systems and all of them produce some amount of rear steer. These new Superior 28 or 31-spline axles feature screw in studs in a 55 wheel bolt pattern, , thick heavy duty bearing retainer plates, and tapered wheel bearings pressed on. Heres a better look at a trailing arm mounting brace. The rear will have Viking coil over shocks . After subframe support arm is out of the way, unscrew the . Long bottom links (equal in length or no more than 1 Simply replace the slug with different combination of offset slugs. 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. 3. 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! A 4-link (on a clamp bracket) generally tightens corner handling. I use the H&R parts stuff anti roll bar OUT OF STOCK until appox. Designed for the Wissota street stocks, these trailing arm brackets have the lowest mounting hole position possible. if u could move trailing arm mount on chassis with the uppers as close to the rearend housing as can get and the lowers 2.5 away from housing. Most often, the factory trailing arms are simply a stamped metal arm. Just as bad, some of the top-mount arms (ones that physically raise the upper trailing arm location on the rear end housing) have a tendency to hammer the trunk floor when you get on the throttle.