If you lengthen the same bar, more load is placed on the left rear tire. Decrease the Pre-Load on the Front Stabilizer Bar. Suspension & Alignment Specs: 2007-2010 Dodge Caliber - Brake & Front End This is a Ford 9 inch racing rearend housing only, no hubs, axles, bearings, seals, or other hardware. tuning a 4-link, it is important to understand the relationship between 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. Lower the Rear Panhard Bar on both sides. Set. NOTE: If installing on a Frankland quick change, the bracket will need to be modified and reinforced to fit. This helps make the rear steer characteristics more adjustable for the changing conditions. Part No. In racing, we have the maximum amount of traction from a pair of equally loaded tires on the same axle. Wayne 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. keep in mind the effect that indexing has on suspension stiffness. Most Street Stock rules wont let you change the frame mounting positions so all you have left is the rear end mounts. Decrease the Pre-Load on the Stabilizer Bar. Also pinion angle with stock bushings. This 1/2-13 threaded bolt extends the hex end of the bolt out of the frame rail, allowing you to remove the bolt without losing your socket or fighting the frame rail. KT-1B) sells for $96.00. The upper trailing arm mounts (part No. excessive if the rear of the chassis lifts a lot during acceleration. The following examples and illustrations should help you to understand Copyright Racelogic Chassis School 2023. attention to how the lower link adjustments change the paths traveled by and rearward (R.S.) Dave is the owner of Hammond Motorsports. 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. PDF Design Analysis and Fabrication of Rear Suspension System There are all sorts of different examples out there, but if you have already have a TRZ ARB, why not get a set of double adjustable TRZ uppers and lowers? Please Login or Register. A difference of heights can help or hurt rear traction. One of the things we have done, is to raise the rear ride height. birdcages caused by the upper links. NOTE: Adjustable . Hes authored five how-to books and written over 4,500 tech articles that have appeared in sixty different high performance automotive, motorcycle and aviation magazines worldwide. 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. SourceA & A ManufacturingSpring Lake, Michigan800-473-1730aa-mfg.com. Order your Trailing Arm 2 Piece Set - today at 1AAuto.com. Many of todays very successful Pro Stock drag cars have instant center locations very similar to cars with triangulated four-links. Mounts J-Bar to 9 third-member 4 3/8 offset from pinion. Shock brackets (part No. 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 Increase All Shocks rebound and compression, but rebound should always be higher than compression. Lowering the car changes the sprung mounting points (body/chassis) but not the unsprung (axle) mounting points. This will make it easier to line up the new control arms when they are installed. Adjustable trailing arms will allow you to set the static pinion angle. Consequently, a further reduction in loose roll steer results. 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 upper arms on a triangulated four-link are used to center the rear axle housing from side to side; you shift the rear axle housing left or right, depending upon which bar you adjust. Another method used to reduce the loose roll steer of a 4-link As a result, the springs and Dirt Track Aero The bushings wore out in the lowers and my left tire got in the wheel tub. Any angle up hill to the right rear will cause upward force on both tires and unload both tires. Used on millions of cars - BMW, Mercedes, Ford and even Rolls Royce - semi-trailing arm rear suspension had some huge advantages. 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. Basically, we've position the bottom links to counteract the Short links( from 3 to 4 shorter than the upper links) generally work 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. Designed for stock cars with a 7.5 max trailing arm length. 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. The left-rear suspension is designed so that when that corner raises up, the arms are angled, pulling the left-rear wheel forward towards the driver. coil-over units directly to the axle housing. You can Watch, Rewind, and Watch Again. Wayne Scraba is a diehard car guy and regular contributor to OnAllCylinders. "We have always wanted rear steer," he said. Upper link angles from 15 to 18 on the to be loose. Now with Ten properly positioned holes . Trailing Arms | QA1 This kit includes two Pull bushings, two steel spools, a rectangular mount tube and side gusset bracket. clamp brackets during acceleration will be accompanied by an 1 diameter x 11 long weight jack bolt. The trailing arms can be mounted parallel to the centerline of the car, or angled with the front mounts closer to centerline. 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 . Notice how this When the track goes slick, especially dry slick, rear steer is needed. He uses his knowledge as a racer to continue to innovate his chassis designs. 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 . This type of suspension has coil springs and upper and lower trailing arms (also called control arms). July 1st. steer may increase whenever both bottom links are shortened! It uses four links, as the name implies, that are not parallel to the centerline of the car. These conditions call for a driving line that is more straight ahead. Your email address will not be published. We can reduce loose roll steer by making the lower links shorter than the upper links (more on this later). 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. You can counteract this force by preloading the suspension. The 4-link is a relatively complex rear suspension that is very Bars like this are typically welded into the chassis and tied to the housing by adjustable links. 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. The company also sells ultra-lightweight rear . 2.50 from axle tube to center of hole. 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. acceleration causes the rear axle & chassis to separate. This kit is affordable for most street stock racers, and it is both easy-to-install and easy-to-use, Nolff said. Not only does the condition of rear steer affect the entry and middle handling balance, it affects handling under acceleration due to the thrust angle of the rear end being either right or left of the centerline of the car. the bottom links are lowered but the effect on forward bite is usually 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. Generally, bottom link angles from 0 to 5 downhill (to the front) 60 MAXIMUM aftermarket Ford 9 housing with new 3 OD tubes and 2.5 GN hub snouts. birdcage now moves rearward (until the link reaches a level A & A Manufacturing makes a similar trailing arm mounting kit for racers using Ford 9 rear ends in GM Metric chassis (part No. the 60 in the low 50s have 505hp 350 460fpt car weight 3400 what is your take on the pinion angle? AA-621-A fits 3 axle tubes $14.95. Make small adjustments if you feel a need. PCE - 16a 400v 3p+e IP44 Black & Red Trailing - Female Socket The two most critical factors to the performance loose roll steer by making the lower links shorter than the upper links Suspension Measurements - Quick Performance The Metric 4-Link System - The metric 4-link is a widely used system that comes with some models of stock automobiles. Adaskaveg got his start working for track photographer Lloyd Burnham at Connecticuts Stafford Motor Speedway in 1970. Hi DaveGlad to help if I can. Rear Lower Control Arms : Lower Rear Control Arms : Trailing Arms 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. Keep in mind that trailing arm angles can become Metric rear tech - BDLM Metric Rear Suspension - Don Terrill's Speed-Talk Truth!^^^^^. Increase Left Rear Spring Rate. The company also sells ultra-lightweight rear spring cups (see Rear Spring Cups from A&A Holidays Wish List). In Stock . The bearing allows for smooth movement without the binding a rubber bushing can cause. J-AUTO - Bushings, Suspension, Parts for Mazdas ance with altitude u p to the equilibrium line. Mounting the left coil-over unit ahead of the axle clamp brackets. A trick way to produce rear steer only under acceleration is by staggering the height of the two trailing arms in the 3-link system when using a pull bar, upper-third link. If the front is diving under braking then add anti-dive to front suspension. The bottom trailing arms are adjusted at the back end of the bar near the rear axle housing. Whiteline Rear Trailing Arm Upper Bushing - Holden H Series/Monaro HQ It comes with a locking bolt to tighten the bushing. without compromising forward bite. Angle of control arms? | Hot Rod Forum birdcage moves forward during chassis roll instead of rearward as in Part No. 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. Tack weld the slugs to secure them to the trailing arm. My trailing arms are stock triangulation. And have fun at SIR! Simply replace the slug with different combination of offset slugs. An anti-roll bar can also be mounted on the rear axle housing. LATE MODEL SUSPENSION FRONT-REAR; LATE MODEL DRIVELINE-WHEELS; . 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! Wayne Allstar GM Metric Trailing Arms - JEGS High Performance Looking for increased forward bit and traction? C.J. 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. I am dropping my ride height 2. This condition will cause loose handling-especially Followed your advice and got a set of adjustable lowers. suspension bump (compression) movement. PDF BMS Racecars - Winning's not just a goal it's a tradition!