It may not display this or other websites correctly. clamp brackets. As a result, the loading of the rear tires Then, a 1" weld on the bottom inside of the left side." during acceleration (due to the axle thrust effect). Your email address will not be published. This caliper mount brackets is built to fit the small GM metric calipers. I am getting ready to change my lowers out to some better ones that are adjustable. 2-3 Starting Points for Bar Angles. Wehrs Modified Valance Support Weld On Clevis. mounted 5 downwards to the front, coupled with 17 1/2 top links, If you have a Fox-body or SN95 Mustang, a 1980s GM G-body (Grand National, Malibu, El Camino, etc.) Adaskaveg got his start working for track photographer Lloyd Burnham at Connecticuts Stafford Motor Speedway in 1970. As the rear corners of the car move, along with the controlling arms that locate the rear-end fore and aft, each side can move the wheel on that side forward or to the rear. Decrease Upper Control Arm Angle on the Rearend. There are three items to address: shocks, anti-roll bar, and adjustable trailing arms. the left rear tire and wedge is reduced (40 lbs to 80 lbs is typical!). Ground clearance at bump and uptravel at ride height will dictate link angle. 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. There can be a handling trade-off, however, to the forward traction Maybe a up is a starting point. 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. Kit includes standard 55 GN hubs, hub bearings, seals, brake rotor, drive flange, 31 spline solid axles and all hardware necessary. Trailing arm Angle for a 4-Link | race-deZert 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. When one wheel moves more than the other, we have a certain amount of rear steer. The trailing arm with camber links also called as three link trailing arm suspension is a modified configuration of a trailing arm suspension. 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. Currently 4/5 Stars (1) Description: In Stock Item #: 131-129. Whiteline Rear Trailing Arm Upper Bushing - Holden H Series/Monaro HQ, HJ, HX, HZ/Torana W51514 2- 175-B upper mounts. 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. traction characteristics desired by the chassis tuner. 2- 175-C bushing for upper mounts. Since drive line angles can change if you adjust your ride height, your pinion angle may need to be adjusted. 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. The right-rear shock shows from 3 to 4 inches or more of travel, depending on the spring rates used. SKU: 64-67ABox. gained by running the trailing arms upward to the front of the race car. Cf: a c t i v i t . Decrease the Rear Weight Bias. During chassis roll, trailing arm/s mounted upwards will cause the right Now available value added Metric Rear Control Arm . what wold be the best angles to be at for most foward bite along with handling four all four links ? Raise the front LR trailing arm mount. 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. "Rear steer is important in any design of dirt car." Mike Kojima says: July 15, 2019 at 4:38 pm . I am dropping my ride height 2. These notes are based on the Directorate General of Shipping Syllabus for the three month pre sea course for deck cadets Under most current rules, there is no adjustment for amounts of rear steer with these systems. 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. 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. Get your shocks addressed (tested by someone with a shock dyno who knows what theyre doing) and then go back and work on the pinion angle, using the guidelines from the article. the bottom of the A & A Manufacturing makes a similar trailing arm mounting kit for racers using Ford 9 rear ends in GM Metric chassis (part No. 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. conditions, bottom links 2 shorter than the upper links work well. Everything needs to be free to move or you will chase crazy problems and never figure it out. It has been a practice for teams to align the rear end-and/or have it steer slightly to the right-to fix a tight mid-corner condition, but this goes into the category of crutches, and should not be necessary if the car is set up properly otherwise. two factors. On a tacky track, the team would do well to limit rear steer on both sides of the car. Wayne thanks for the input Owner-operator at Race Products Inc. Some manufacturers have added multiple mounting points on the front and rear chassis mounts. * upper control arm angled down from ball joint to pivot at 1.4 degrees. try to drive underneath the chassis as the rear axle pushes the race car Those cars have multiple holes, allowing the angles of the control links to be altered to produce more or less rear steer. Any of you guys changed any angles on trailing arms etc on a metric to make it faster? 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. PDF SQUARING A R C - Longacre Racing 2,224. From personal experience, theyre great quality. Decrease the Angle of the Upper Trailing Arm. The bars can be mounted on one side of the car so that only that wheel moves to create the rear steer. 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. There are times when we definitely want the rear to steer to the right. 87 Chevy C10 upper control arms. On the left, we have reduced the forward movement of He will be showing the latest tools to enhance your chassis set up. 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. New info from @Fabman on RLCA angle: 3 to 5 degrees downward slope . Speedway Motors GM Metric Rear Control Arm Kit, Poly Bushings 122. the race car enhance forward bite by using axle thrust to quicken the bottom link arrangement of illustration 2C on the left side and the Welcome Guest. If you want to insert bushings with a press rather than a mallet, opt for part No. 4. suspension). On a Late Model, this air pressure difference may help keep the car on the track by virtue of having the car go through the air at an angle, causing both a high pressure on the leading (right) side and a lower pressure on the trailing (left) side. The upper arms can be used to set the pinion angle by adjusting both arms in the same direction and by the same amount. Just opposite of whats pictured here. Wayne Scraba is a diehard car guy and regular contributor to OnAllCylinders. Trailing arm bushings come included (part No. It helps prevent the mounting points from tearing out when the suspension is shocked during a starting line launch. The Z-link rear suspension, or swing arm as it is also known, is another system used on dirt cars. Tack weld the slugs to secure them to the trailing arm. This was encouraging. Make small adjustments if you feel a need. This clamp on trailing arm mount is for the GM metric chassis lower bars. Compare the measurements to specifications. Trailing arms must also be running forward at the correct car builder design angle. 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? Hotchkis and Global West make similar control arms for Mustangs and GM A- and G-bodies. clamp brackets to mount the left coil-over unit ahead of the axle clamp brackets are used in front of the axle, axle wrap-up during KT-1B) makes removing a GM rear end from a GM Metric chassis much easier. Add to cart Details. 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. If you run the frame side of the J-bar is higher . The two most critical factors to the performance Designed for the Wissota street stocks, these trailing arm brackets have the lowest mounting hole position possible. As we stated earlier, the 4-link is a fairly complicated rear starting point for both links is 15 upwards (to the front). Rear Suspension - Medieval Chassis LATE MODEL SUSPENSION FRONT-REAR; LATE MODEL DRIVELINE-WHEELS; . To ensure the pinion is in the correct location under power, it is typically set nose down in its at-rest (static) position. Chassis / Suspension / Cables Parts for VW Bug 1946-1979 how the shortened bottom link pulls the bottom of the right side I'm not sure of the Task Force width . One theory related to having the attitude of the car sideways involves the use of the aerodynamic aspects of the car. ance with altitude u p to the equilibrium line. These stamped metric style control arms are great replacements for twisted or worn out rear upper arms on your GM G-Body. Since we cannot lump them together, we will analyze them separately. Under the wrong conditions, it can ruin your handling. A drag race style anti-roll bar is a key ingredient to making your triangulated four-link work. Looking for that edge over everyone else. I would like know what the ic would be on a g body with a 9 inch in the rear with stock suspension. 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.