266. Photo courtesy of BMR. Ask me how I knowL-O-L. Hope that gets you sorted out. unloading of the rear tires during deceleration This unloading can upset There are four types of rear suspensions used in most dirt cars that are significant to study regarding rear steer. I am dropping my ride height 2. . Made out of 1/2 thick steel to gain extra LR weight. Lower the Rear Panhard Bar on both sides. Trailing arms must also be running forward at the correct car builder design angle. if the left rear of your chassis hikes up during cornering, loose roll The content was subject to approval of A & A Manufacturing. 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. West Coast Metric - Suspension Parts, Front & Rear. AA-175-B) are constructed from stout 5/8-thick steel. The Truck-Arm System - The truck-arm system has been adapted from the design for a 1964 Chevy truck, and is used on many Late Model Stock cars, as well as the three premier divisions of NASCAR (Craftsman Trucks, Busch, and Winston Cup). Therefore, the rate the car feels is much less, usually around 50 percent, than the actual installed spring rate. efforts, will provide you with an advantage. Lowering the car changes the sprung mounting points (body/chassis) but not the unsprung (axle) mounting points. 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. Description. using stock coil springs new .have adjustable uppers and on rough race tracks. A level panhard bar ( same mounting height on both sides) means force is vectored laterally to the tires. It comes with a locking bolt to tighten the bushing. birdcage forward during chassis roll more than the longer links in AA-621-D is a clamp-on spring cup, fitting 3 tubing $24.95. Required fields are marked *. Then, a 1" weld on the bottom inside of the left side." Simply replace the LR bracket and have increase drive and adjustability. Decrease LR Shock rebound and/or increase RF Shock compresion. 3. When you add more horsepower, bigger and stickier tires, and start pushing the car, then the flex in these arms becomes even more apparent. Your email address will not be published. You should draw the paths to include Rayburn of Rayburn Race Cars, a driver as well as a car builder, echoed much of what the other buiders had to say. Clamp Brackets are used to mount the Characteristics of the metric 4-link, one of those four, are the same as discussed under the heading related to asphalt cars. Suspension Type Camber Angle; FWD: Multilink Trailing Arm Twist Beam: 1.0 1.0 1.0 RWD: Multilink Trailing Arm Swing Arm: 1.0 1.0 1.3 AWD: Multilink Double Wishbone Trailing Arm: 1.0 1.0 1.0 4WD: Multilink Double Wishbone Trailing Arm: 0.5 0.5 0.5 A rear end steered to the left of centerline will cause the thrust angle to be left of centerline and make the car tighter on entry and tighter on exit under acceleration. 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 . can tighten overall corner handling by using If not, no amount of adjustment will get the thing down the track properly. . Adjust the length of the control arms as needed to achieve the desired pinion angle. Rear steer in this system is caused by chassis movement, which can produce several secondary effects. How Much is Too Much? forward (See illustration 1). bottom links further as shown in illustration 2C. Learn how your comment data is processed. The setup is balanced when the LF and LR tire temps are similar. suspension is to shorten the bottom links. Wehrs Modular Non-Adjustable T-Bar. This has been confirmed by studying data from onboard computer systems during testing that show shock travel amounts in the turns. However, keep in mind that chassis roll causes the link angles to the other illustrations. This induces less rear steer when the car squats on exit. A & A Manufacturing makes a similar trailing arm mounting kit for racers using Ford 9 rear ends in GM Metric chassis (part No. 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. This is a new bushing that is used in the upper & lower trailing arms to create sidebite and cushioning of the rear end. If you dont do anythinig else. Check Tire temps, if LF is coolest (unbalanced setup): Decrease front springs, maybe even use reverse split (LF stiffer). The Z-link System 60 offset new reproduction stamping Ford 9 housing with new 3 tubes and GN hub type snouts. The company also sells ultra-lightweight rear . 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. However, a proven 4-link arrangement includes 15 1/2 bottom links, rear tire to move rearward (until the arm/s reach a level position) and or something like an early Chevelle or a GTO, it has a triangulated four-link rear suspension. chassis up during acceleration which can reduce the effectiveness of the the race track. If you lengthen the same bar, more load is placed on the left rear tire. For most track Dave's Tip - "You should always tack weld them in place. Built with corrected pinion angle and our proven "Pull" Bushings. Set. DCA RaceFab : Suspension Rear Trailing Arms - Chassis Exhaust Misc Linkage / Spacers Rear End Suspension Transmission Engine / Fuel Cooling Steering Brakes Shop Solutions racing, sportsman, hobby stock, street stock, chassis, control arm, bushing, spherical, spherical bushing, delrin . We can relate 1/8-mile e.t. Jigged with our: Add to cart Details. change of 5 can make a noticeable change to handling. Fox80. gained by running the trailing arms upward to the front of the race car. birdcage now moves rearward (until the link reaches a level You should pay close shocks are compressed from both ends at once and the suspension becomes 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. NOTE: Adjustable . Then this NEW trailing arm bracket kit is a must have. 2.50 from axle tube to center of hole. Their offerings include rod ends, spacers, bushings, clamps, brackets, and mounting hardware for a number of items, from shocks, to brakes, to fuel cells. length and/or angle difference in the upper and lower links. AA-175-D. Maybe a up is a starting point. See all 6 photos. Hi DaveGlad to help if I can. The live class took place January 22-23, 2022. A difference of heights can help or hurt rear traction. Clamp brackets are sometimes used on short, slick tracks to improve during acceleration (due to the axle thrust effect). the bottom of the The lower links are angled from a top view with the front pivots narrower than the rear pivots. Welcome Guest. Ground clearance at bump and uptravel at ride height will dictate link angle. suspension moves (unless both upper and lower links are equal in length The idea is to trace the paths actually am out of adjustment on the uppers so will be installing a set of adjustable lowers (Steel). shorter than the upper links) work best for fast tracks or on any track These systems only steer to the left and have a limited amount of steer. 3 to 4 degrees nose-down is recommended. Perfect for the guys that already have or Extreme or Xtrmer Drop brackets. Copyright Racelogic Chassis School 2023. Indexing is greatest when there is a lot of Decrease the Pre-Load on the Stabilizer Bar. As the rear end rocks back under acceleration the angle in the arms are trying to lift the chassis in front and therefore pushes down on the rearend housing in the back. currently using 4.5 down and it picked up 60. Performance Disc Brake . The RR lower most will run level. right and 10 to 15 on the left provide good forward bite. That way, the car will stay as fast and balanced as it can be throughout all of the changing conditions. extremely short links change their angles radically whenever the There are reports from the past of a team winning a race using four 400-pound springs on a Z-link type of car. On asphalt, do not make large changes to components that influence rear steer. Shock brackets (part No. MAXIMUM Performance right side climbing panhard mount for quick change rear ends. AA-621-A fits 3 axle tubes $14.95. Adjustable 73 - 77 . For a better experience, please enable JavaScript in your browser before proceeding. Hes owned his own speed shop, built race cars, street rods, and custom motorcycles, and restored muscle cars. This is done to add more angle to the lower trailing arms, which adds roll steer to the rear, as the body rolls. Joe Garrison of GRT Race Cars and Mark Richards of Rocket Chassis both said having rear steer capability in a dirt car was critical. 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. initial forward bite. 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. loading of the rear tires. Some manufacturers have added multiple mounting points on the front and rear chassis mounts. Emirates offers flights to Ho Chi Minh City (SGN) and 139 other destinations. conditions, bottom links 2 shorter than the upper links work well. JavaScript is disabled. When the track goes slick, especially dry slick, rear steer is needed. In dirt racing, it may be advantageous to incorporate a large amount of rear steer under certain conditions. wood, aluminum strips, etc. Wayne You can play with all of these a little to work on plunge/roll steer. 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. 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. 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. Dartmouth, Nova Scotia. The length of the bottom links are dependent on the roll steer and Keep in mind that trailing arm angles can become excessive if the rear of the chassis lifts a lot during acceleration. Under the right conditions, rear steer can be beneficial and enhance performance. SEALS, FRONT TRAILING ARMS, SET OF 4 *GERMAN* STD BUG / THING / GHIA 1966-77. BMS Racecars - Winning's not just a goal it's a tradition! Putting the stock "W" style suspension into a bind is your biggest enemy. 2- 175-B upper mounts. There are three items to address: shocks, anti-roll bar, and adjustable trailing arms. at least 3" of rebound movement for the left You should use the information in this This bolt on upper trailing arm mount is designed to allow use of a quick change into a stock GM metric chassis. 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? Click here to remove banner ads from this forum. Looking for that edge over everyone else. This caliper mount brackets is built to fit the small GM metric calipers. suspension moves. However, indexing can cause the rear suspension to be too harsh 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. You can also check 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. SportMod jigged. path traveled by any trailing arm will affect roll steer. When selecting springs for your 4-link, you should cause a gas pedal push. Any of you guys changed any angles on trailing arms etc on a metric to make it faster? This year marks the Outside Groove Director of Photographys 51st year of covering auto racing. The two most critical factors to the performance On the left, we have reduced the forward movement of Wehrs Bent Suspension Bar Angle Finder. Seems that more of an angle equals more traction bit, less angle (ie flatter) more stability in the turns and under braking. Some will say run them as low to the rearend housing as you can. Rear steer can either tighten a car or make it very loose. 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. The front may be too stiff compared to the rear. Typically, indexing causes the coil-over mounts, if located on the Leaf-Spring Systems - The leaf-spring rear suspension system locates the rear-end fore and aft, as well as laterally using the leafs. Excess loading of either the left- or right-rear tires decreases traction in most cases. corners. The variation of height for the right-rear trailing arm is very small. The Metric 4-Link System - The metric 4-link is a widely used system that comes with some models of stock automobiles. ~ index. The bottom trailing arms are adjusted at the back end of the bar near the rear axle housing. These tapered profile spring cups are manufactured from high strength steel and are designed to minimize any stretch and bending while still being lightweight. 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. Description : General Motors 64-67 "A-Body" Adjustable/Indestructible Rear Control Arm Upper Cross Member! AC A/C Compressor for Honda Civic L4 1.6L 1.5L 1994-2000 & CR-V 2.0L 97-01. Dirt Rear Steer So, teams need to take this rate difference into account. Truth!^^^^^. SourceA & A ManufacturingSpring Lake, Michigan800-473-1730aa-mfg.com. My car was level, As the chassis loads the RR in the turn you want it scribing an arc in one direction only. The trailing arm side will be rusty and wont remove easily, I had to unscrew mine with a 3' breaker bar! (on a clamp bracket) generally tightens corner handling. They are angled to fit GM Metric chassis and have four holes for racers to adjust their trailing arm position. But since left side AA-621-B fits 2-5/8 ones $14.95. The rear will have Viking coil over shocks . suspension. birdcages during chassis roll. 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. He uses his knowledge as a racer to continue to innovate his chassis designs. Your DS length will dictate your lower link length. These tips are for an independent a-arm front suspension and 3-link rear suspension type of car, but may apply to other types of suspensions as well. "Rear steer is important in any design of dirt car." (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. Its on a car that Im helping with. I have tried different set ups with some success am now at 4.5 down short bottom link arrangement of illustration 2D on the right side. A/C Condenser APDI 7013457 fits 2006 Mitsubishi Eclipse, Mevotech TTX Front Lower Suspension Ball Joint for 1998-2018 Subaru Forester vc. 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. Be aware that trailing arms angled uphill too steeply can hold the Semi-trailing arm suspension, handling and stability performance, non-linear vehicle model, Bees algorithm Date received: 17 November 2011; accepted: 3 February 2012 Introduction 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. 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. 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. . Condition: New. Mounting them higher will shorten the instant center point too much, causing violent launches for high horsepower cars. Spring Perchs & Brake Caliper Brackets are now Bolt-On Accessories (not included in Rear End Assembly Price). with the very soft chassis meaning floppy front subframe is 4.5 enough? Ben from AFCO Racing is an expert in multiple aspects of race cars including cooling and set up. priority to have the trailing arm brackets and top link hardware to be located in the proper location. LZ-13-B) from 3/16-thick steel. Where did I run mine? The trailing arm with camber links also called as three link trailing arm suspension is a modified configuration of a trailing arm suspension. AA-621-C is an offset spring cup, which sits 2-1/2 off center of a 3 axle tube $14.95. Wehrs Body Bolt Panel Inserts. Change your lead or trail of the rear end by simply changing the combination of offset slugs. birdcages, to rotate against the shocks and springs during Notice how this (Try to bounce the rear of a car with a 4-link rear this important function of the lower links. 4. right, the left rear tire can become loaded more quickly than the right 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. My trailing arms are stock triangulation. Currently 4/5 Stars (1) Description: In Stock Item #: 131-129. stop and go or slick race tracks. And have fun at SIR! 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. attention to how the lower link adjustments change the paths traveled by Lower the front LR trailing arm mount. Increase the Angle of the Upper Trailing Arm. 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. $15.75. A smooth entry provides a faster exit. These trailing arms will improve handling of the rear suspension by replacing either twisted or worn out OE control arms. sensitive to adjustments. There can be a handling trade-off, however, to the forward traction Changes in the height of the front of the trailing arm as small as a 1/4-inch can be felt by the driver. Wehrs Body Braces. 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 . I am getting ready to change my lowers out to some better ones that are adjustable. Another method used to reduce the loose roll steer of a 4-link 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. Youll find that an instant location similar to stock is actually close to optimum, provided you dont jack the body way up in the air. Wehrs Metric Trailing Arm Bolt. In simple terms, it keeps the body from roll rotating on the launch. 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. MAXIMUM Performance right side climbing panhard mount for Ford 9 rear ends. If both sides are configured to move in opposite directions, then rear steer can be extreme. . We can use the lower links of a 4-link suspension to help offset the Just opposite of whats pictured here. Also, how old are the shocks and have you ever had the valving checked? 3. Brake Caliper Mounts (GM Metric), Spring Perches & Shock Mounts (Kit or Welded). 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. Mounting both In racing, we have the maximum amount of traction from a pair of equally loaded tires on the same axle. After subframe support arm is out of the way, unscrew the . Rear steer in this system is caused by chassis movement, which can . There are a few similarities, but many differences in how we evaluate and use rear steer for each group. the left rear tire to move forward. No more than 10-15 pound difference, excess split makes car tight. Adjustable lower bars are used to center the tires front to back in the wheel well and to make small wheelbase changes. Decrease the Angle of the Upper Trailing Arm. by comparing the different paths drawn on your model. Wayne Scraba is a diehard car guy and regular contributor to OnAllCylinders. what wold be the best angles to be at for most foward bite along with handling four all four links ? All driving train actually repalced with Moog components.. The trailing arms can be mounted parallel to the centerline of the car, or angled with the front mounts closer to centerline. We can reduce loose roll steer by lowering the bottom links at the This is accomplished by causing the right-rear wheel to move back and the left-rear wheel to move forward as the car rolls. Decrease the Pre-Load on the Front Stabilizer Bar. In this case, that equates to a 10.80. 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. Reply. 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. This produces a motion ratio that causes the spring to move less than the chassis per degree of roll and/or inch of squat. You may be required to make chassis adjustments to The layout, lengths, and angles of the upper A-Arm work together with Lower Control Arm to encompass what engineers refer to as an Instant Center. Indexing can improve driveability by keeping the race car flat in the It takes less than two hours for an experienced welder to install the kit.. A link length change of 1" or a link angle If you want to insert bushings with a press rather than a mallet, opt for part No. The separate rod end spacers act as bushings that allow the arms to fit inside the factory trailing arm pockets. 4-link, or use the design parameters mentioned in this article, to help 650 whp. Basically, we've position the bottom links to counteract the Advance Design Trucks seem to be using rear ends with widths ranging from 58"- 62". 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! As a result, the loading of the rear tires If the upper links are shorter than 17", the lower 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. The instant center is also rather high; the angles of the bars can raise it somewhere above the front wheel spindle. "High left-rear loading does not increase traction," he said. We can reduce These bars are used to center the wheels in the wheel well and to set the wheelbase from side to side. Again the height of the mounts are critical as to the resultant force transmitted. Keith Masters of MasterSbilt Race Car Chassis said, "The reason chassis builders build 4-bar cars is because of rear steer. You can Watch, Rewind, and Watch Again. shortened bottom link. 4AN To for 8mm X 1.0 Metric Straight Adapter Vibrant. 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. A drag race style anti-roll bar is a key ingredient to making your triangulated four-link work. These conditions call for a driving line that is more straight ahead. Adaskaveg got his start working for track photographer Lloyd Burnham at Connecticuts Stafford Motor Speedway in 1970. If you run the frame side of the J-bar is higher . A & A Manufacturing makes a similar trailing arm mounting kit for racers using Ford 9 rear ends in GM Metric chassis (part No. A lot of guys take that to extremes.". We can reduce loose roll steer by making the lower links shorter than the upper links (more on this later). 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. It comes with a locking bolt to tighten the bushing. 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. 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. REAR - On each side of the vehicle, measure the distance (2) from the center of the outboard trailing arm-to-body mounting bolt (1) to the floor or alignment rack/lift runway surface. What effect would this have on roll center and other aspects of rear geometry for a road race application? Custom Part is Non-Returnable and Non-Refundable. 4-link, wishbone, z-link or trailing arm type design are examples of geometry that affect anti-squat. Sep 1, 2009. In Stock . This bracket is also built heavy, weighs 7.5lbs (with slugs) to help increase LR rear end weight. Wayne thanks for the input links have to be extremely short to minimize loose roll steer. Has gone 1.29 60 ft on spray, has 28 10.5 et street tires on it also. NOTE: If installing on a Frankland quick change, the bracket will need to be modified and reinforced to fit. Most often, the factory trailing arms are simply a stamped metal arm. Asphalt Rear Steer $149.99; 149 - Reward points. With this design, lateral movement of the rear end causes rear steer. Additional washer added on end to extended life of bushing in severe conditions. Housings have fill and drain plug installed. If excessive, loose roll steer can cause a loose Stop messing around using 1 nut from the local hardware store to make a weight jack mount. correctly. 2-5 Rear Spring Table. A good Pinion angle is measured between the pinion gear flange and the driveshaft. but there are ways to get that back. $ 599.95. Trailing arms mounted in this manner cause the rear tires to The left-rear shock mostly seems to move between 1/2-inch in rebound and up to 1/2-inch in compression during the entire lap. Rear steer amounts-due to the Panhard bar angle-are regulated by the angle. to be loose. Asphalt stock cars have four predominant rear suspension systems and all of them produce some amount of rear steer. Departing from Ho Chi Minh City. The front of the car felt the actual 400-pound rate while the rears "felt" like 200 pound springs. Under most current rules, there is no adjustment for amounts of rear steer with these systems. Bars like this are typically welded into the chassis and tied to the housing by adjustable links. 2- 175-C bushing for upper mounts. Any angle up hill to the right rear will cause upward force on both tires and unload both tires. Kit includes standard 55 GN hubs, hub bearings, seals, brake rotor, drive flange, 31 spline solid axles and all hardware necessary. Used on millions of cars - BMW, Mercedes, Ford and even Rolls Royce - semi-trailing arm rear suspension had some huge advantages. birdcage moves forward during chassis roll instead of rearward as in I have a blown 71 Chevelle. Assembly includes: 2.5 MAXIMUM GN hubs, hub bearings, seals, brake rotor, drive flange, axles and all hardware necessary. Facebook; Twitter; Youtube; Pinterest; contact us . You can evaluate the roll steer characteristics of different set-ups This Spring Cup is extended to hold the spring while the chassis hikes for Northern Sport Mods and . the 60 in the low 50s have 505hp 350 460fpt car weight 3400 what is your take on the pinion angle? I am setting up a GM A body 1972 Monte Carlo.