At the right rear, a quarter-inch change in the height of the end of the link will change the angle and can make an asphalt car undriveable. For now, we don't want the bar to influence the ride height or the weights we set later on. springs settled over the first 3 months. Brake pads badly taper worn - replace. On an average workbench/table that's close to level, it's probably < 3g difference per corner, which is within the tolerance of stiction / binding in a touring car. You can also use this online calculator to compute your corner At the rear, your rear control link angles are critical to maintaining rear alignment and determining rear steer angles and/or reducing rear steer altogether. Find the difference from the desired average ride heights. To find RF weight: Now that we understand why we need to maintain a set ride height, let's go through an example of how to set ride height. Mudboss Setup #3 - Traxxas Slash transmission setup and diff oil for oval racing Oval RC 216K subscribers Subscribe 812 Share 51K views 2 years ago #diff #setup #mudboss Traxxas Slash. the RF coil over 5 turns. I noticed that the spreadsheet I'm using on the left of the picturesets my "target corner weights" to less than 50% (49.6%),why is that? The spreadsheet's second page has a good article that goes into more detail of two years. 12. So 2.5" springs and experimenting is the way to go- I think I know that much.. . Circle-Track Setup: What Is Toe, And Why Should You Use It? Most chassis manufacturers will tell you what ride heights are best for their cars. racers add "wedge" by adjusting the right rear spring perch--they This was a very interesting post to me. Grassroots Motorsports Understanding Corner Weights You cannot change the left or rear percentages by jacking weight around in the car, although this will change cross-weight. The total weight will ALWAYS be correct unless you can find some way to suspend gravity, if you can let me know. This obviously means that decreasing cross weight or left side weight Calculate the spring rate multiples. Ah, OK, thanks for the clarification. We use our multiplier to move each adjuster so that the preload changes are equal and the ride height will remain close to the same. Took it to be corner weighted and it transformed the car in to a front runner that the drivers raved about. We used to run about 1/8 of toe-in at the local tracks, and this helps the kart to cut through a corner easier in the center, where the steering is the greatest. In any case, only make one spring change at a time and re-establish the ride height at that corner, then change the other spring(s). Brake pedal is soft, spongy and/or long before the car is run: Air in the system - bleed brakes. Maybe there's some sort of bind in the scales. work but in the end it's worth it. much Wedge Delta and make the handling worse. Weight Training: Everything You Need to Know About Race Car Weight scales are connected properly--you can really screw up your suspension settings Choose a level spot in your setup area. . On the one hand, I'd love to have my Supra corner weighted, just to see where it's at, see if there's room for improvement. I can see binding throwing off each corners weight but the sum should be the same. Afterward you need to adjust the settings to the correct maneuvers. Get the rear percentage as close to the manufacturer's specs as possible. how and why to corner balance a car. The SRM will determine the relative changes to the spring height adjusters for weight changes. If you do have adjustable end and Left Rear. Step 1: Setup And Tuning The Tires Most regular RC cars use rubber tires. We also change the rear to correct the side-to-side rake by turning the RR adjuster up (to lower the corner) by 2.5 turns and the LR adjuster down (to raise that corner) by 2.5 turns. This was my first adjustment: Four turns of positive coil Changing the ride height at any corner will change the cross-weight percentage. balancing see my corner balance how-to and The Circle Track Analyzer is a computer program that simulates most any car you can design, racing on most any size oval track. The roll center is an imaginary point around which the rear of the race car rolls. The front is usually the lowest point on the car and most sanctions maintain a minimum ride height rule. them for the corner balance. Always To keep things clear I call this added LR/RF weight Wedge Toe inn a 1/4 inch. used cheap linoleum tiles (49 cents each at Home Depot) to shim two of my scales Use a load of fuel for where you you want the car balanced, either at the start of the race, the end of the race or an average between the two. But in a right turn, the opposite occurs and the handling is worse. 5.00 front 8.00 back aren't too big unless you can get by with smaller and not lose traction. surface. Then move components like the battery or fuel cell. What is Wedge in Dirt Racing? How Can it be Fixed? - Southern Reaceway Fans 1 of the section on "Adjusting The Corner Weights," and that is 685. I guess I should work on losing weight personally (i am 220~). and stock rear sway bars connected. You will have to repeat this every time you lower the car onto Even 1/8 inch difference will make a difference, especially if you have Many successful race teams use corner weighting to achieve the same F/R % on both sides equal, not cross weight. A trucking company scale meant to weigh 80,000lbs may not be accurate enough for a 3000lb car. Would be interesting to see how close to ideal I got it though, given how well it handles already. turns. I lowered the left rear spring perch 1 1/4 turn and put it on When we make weight changes, we will move the adjuster rings or jack screws in multiples, the softer spring adjuster will need to move more than the stiffer spring adjuster by the multiple number so that the weight change will be the same side to side and the ride height will not change as a result. Shock Position of the scale to take a reading. should have their spring perches in the same spot and your left rear and right The proper progression for these two parameters is to establish ride height first and then set the corner weights, which comes down to setting the crossweight. 6. more traction or bite in left turns. cars through the corners and thats where there eating me up. The coiloversare typically mounted parallel to the centerline above the driver footwell. I put the car on grease tiles so the tires move freely on the scales and then I bounce each end a couple times. A jumbo ziploc bag prevents lube from escaping when not in use. One of the problems with cross-weight is that it will change the handling balance from a left to a right turn. Maybe I'm over-thinking this, but I was amazed when I got my new scales, and let my car down on them for the first time. (TVW LSP) - LF = 769D. Rethink Dirt: Advanced Dirt Track Theory | Hyper Racing racers discovered they could insert an actual wedge into the left rear These weights are in ready to race form (including driver on board). Firstly, you need to balance out your RC. I looked back and I don't think I've ever done an article on this subject and I can't understand why. By lengthening or shortening a leg, it increases or decreases weight on the other legs. intentionally favor a turn direction. Oval Track. typically not concerned with bite and wedge delta because they usually 2. used are 0.045" thick. Corner weights-cross weights - TenTenths Motorsport Forum This allows a slightly lower rear stance, which provides a good weight transfer entering a corner. Once the corner camber angle of the wheels (-3.5 front, -3 rear). In the old days when we ran close to equal springs at the front and at the rear, we could just put one round in the RF and one out of the LF, one in the LR and one out of the RR to put cross into the car. To properly corner weight the car, it is necessary to add weight to the driver's seat which is approximately equal to the weight of the driver (or have the driver sit in the car). to get a balanced diagonal weight on the tires. The new existing ride heights are LF 3.6875, RF 4.8125, LR 4.1875, RR 5.3125. Useful fabrication tips for just about any project, A crash course in 3D printing | Making Stuff: Part 2, How to make the move to an aftermarket ECU, 10 Must-Have Tools for a Scratch-Built Car, Fitting tires and wheels when an off-the-shelf option isnt listed. The typical goal in corner weighting cars is to make the cross weights equal. Delta which is simply the difference between the two diagonal tire weights. There are several ways race teams adjust corner weight. If you don't have adjustable end links on your anti-roll bars Dodge Neon Build and Race Advice Gen 1 - Technical Discussions stiff springs on your coil overs. We will deal with preload on the bar later on. Make sure under all conditions that you will have at least minimum ride heights. To carry the wheel load, the spring must be compressed quite a bit. what he means is he's adding weight to the left rear and right front For asphalt, on the flatter tracks, corner entry is enhanced when running a softer right front spring. Race Tires: Are You Ready to Spend Some Money? On oval track cars, cross-weight is usually used in conjunction with stagger (where the right rear tire is larger in circumference than the left rear tire) to balance handling. racers discovered they could insert an actual wedge into the left rear very close to ideal. Search for: Or maybe I read the post wrong. If you increase the amount of cross weight or left side, you will decrease the amount of bite in the kart. 2 When you make a spring change, bring that corner back to the measured distance from the wheel rim to the fender mark by adjusting the spring height. Well there is a bit more to it than that. Tell the shop you will be disconnecting the rear sway bar when obtaining the estimate. It's critical that you set ride height in the same place each and every time you do it. This keeps the ride heights as close to ideal as possible. When a NASCAR crewchief says he's "adding wedge", need to roll the car back and forth a few inches several times, being careful The other two corners will lose weight. Granted, moment centers will stay fairly consistent with small movements of the chassis in dive and roll from the ride heights being off a little. I'm anxious to see what Proform says about my experience. Can do to just left sidesor right sides, or to all 4. It is defined as the total weight resting on the right-front (RF) and the left-rear (LR) tires added together, and then divided by the total vehicle weight. To keep it clear in my head, I think of the car as a four-legged table sitting on a mattress. retract the right rear tire which puts more weight on the Left Rear and rear and tried again but I still needed more weight off the right front and left Wedge Delta and what values work best for certain tracks and conditions I use 2x6 wood planks as ramps to drive the car onto Motor: 550 or 540 motors only. Right Front tires. 3) Reverse stagger: The opposite of stagger when your left side tires are . This can make maneuvering in traffic difficult, even dangerous. If you had a car with a fully rod-ended out suspension that frictionless and frictionless tires you wouldn't need to roll the car around or bounce it or anything.
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