Adjustable end links are more to balance your car in one big step. over How To Set Up RC Dirt Oval A Guide - Explained! You should also complete this process with approximately the amount of gas with which you will be racing. A stiffer spring on one corner equals more weight transfer to that corner. In our example we will be using the same method with corrections for different rate springs. Are they non-adjustable? This approach is commonly used in oval track racing. Open timing on motor and esc. Teams that do not stay on top of these two setup phases will not only be inconsistent, they will struggle to find their way setup wise. Corner weighting can be a complicated process for you to complete without someone who is experienced helping you. Calculate the average existing ride heights front and rear. Speaking of springs, it's a good idea But this doesn't explain why the Vette's readings came in so well, while I had to jump up and down on my door sills quite a bit before my car's weight stabilized at its expected value. Dirt or asphalt? Basically - after you finish the set up routine, the car goes in the hauler. When you lower the panhard bar the rear roll center drops. Cross Weight % = track are left turns then having more weight on the Right Front and Left Rear My car is a 1987 Honda CRX, set up according toITC class rules. 10. Left Front and Right Rear but you'll have to test to find out what works best. started with the Left Front because I wanted to raise the ride height of the car RC Oval racing is probably the easiest form of RC racing right, right? In our example, the front average is 4.25 and the rear is 4.75. Then the car will move more easily from one setting to another. The front is usually the lowest point on the car and most sanctions maintain a minimum ride height rule. My left rear is something like 150lbs heavier than the right rear, with both fronts even at ~740lbs each on a 2425lb FWD car. If you do have adjustable end links then disconnect 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. - can make your car dive like a dump truck or a block of wood on ice. I added the It's the effective distribution that changes when you have suspension bind. tiles) on the left front and 1 on the left rear to level the scales. Scale Type: . The third thing I look for to make at the track dirt race car handling decisions is where the driver lifts the gas going into the corner, and the overall entry speed. used linoleum tiles to shim two of my scales to get them all level. The outer rear tire drives "around" the outer front tire, allowing the chassis to efficiently turn into the corner because the rear tire The weight transfer process occurs regardless of the spring rates at each corner of the car. These tell us all we need to know about the setup relative to the weight distribution. racers discovered they could insert an actual wedge into the left rear If we subtract the existing ride heights from the desired, we have front low by 0.0625-inch and the rear high by 0.4375-inch. measure (literally). retract the right rear tire which puts more weight on the Left Rear and Wedge Delta should be positive for oval racing. Oval racers favor left turns so they typically desire more weight on the right front and left rear tires. Splash = 2-3 gallons, 1/2 can = 5-6 gallons, 1 can = 11-12 gallons, 1 1/2 cans = 17-18 gallons, 2 cans = full tank. T-Bucket . And what do you mean by "lots of bearings"? - Use blocks the same height as your scale pads to move the car off the scales to make adjustments. A common example of caster is a shopping cart. The only way to change static weight is to physically move weight or ballast in the car. If one leg is longer or shorter than the others, the table will rock and thus be unstable. if you have any of the scales connected improperly (i.e. Dirt adds weight, binds suspension parts and hides potential problems > The bearings come well oiled and attract a lot of dirt. All 4 scales must be within 1/8 of an inch. 5 diameter stainless ball bearing on top of a 1" shortwell socket on the center of a floor Jack and jack the car up in the center of the rearend housing. 4m.net - The Most Opinionated Racing Message Board In The Universe. You can estimate your car's center of gravity We have 4.1875 front and 5.1875 rear. 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. Once the ride has been set, it's a simple operation to bring the corner weights to the predetermined values. I've spent an hour this afternoon trying to do corner weights "on the cheap" using our IKEA kitchen scale (cost - 15.99 a few years ago) and three wooden blocks cut to the same height as the scale (38mm). In the above example, to go from 52 percent to 50 percent cross-weight, try lowering the right front and the left rear one-half turn on the weight jack bolt or spring perch while raising the left front and right rear the same amount. coil over 5 turns. Set them to hot pressures is the norm as I understand it. Note your ride heights and 3. anti-roll bar with the end-link adjusted so it's easy to insert the Thanks for posting this. Beginners Guide to RC Racing Oval - TheRCProShop.com RC Oval Racing - Indy RC World Typical racing scales will calculate this for you automatically, but you can rig up something that will work using a single scale and 3 equal sized spacers to get a good estimate. At the front, we will move the LF and RF adjusters up by 0.0625-inch. more traction or bite in left turns. R. racing junky Member. It would just automatically settle. intentionally favor a turn direction. want balanced turning in both directions. I dropped my integra off at edge to have this done today. racers add "wedge" by adjusting the right rear spring perch--they decided to try 5 turns total of spring perch movement to balance the car. They are not too suitable for racing and oval dirt cars. Circle Track Analyzer - Performance Trends 3. I have now added the ratios so I can visually see what's happening. So as long as you are draining the fluid from your shocks, also remove or cut away the seals. We also take five rounds times the multiplier for the front of 1.25 5 = 6.25 rounds out of the LF. You would be amazed at how much bushing twist can contribute on your suspension. want balanced turning in both directions. We should now be at, or near, the desired crossweight percent. Adding more rebound to the car will make the car more stable on rougher tracks. For high banked tracks, the front spring rate must be increased and it is often necessary to. Before putting your car on the scales you need to power up RC Dirt Oval Car Setup & Tuning Guide [5 Key Steps] Similarly, dirt oval cars often represent crossweight as "bite", or weight on the left-rear tire relative to the right-rear tire. You can drop the front end slightly or raise the rear end for more aggressive turn-in. lowered onto the scales the tires will need to spread out to unbind the Full of fuel, everything done, full of oil, lead bolted down. Find the difference from the desired average ride heights. of the scale to take a reading. Astrut with its innards removed? Now that we have the front-to-rear rake set, we adjust the side-to-side rake. Rear weight percentage for road racing and autocrossing is less definite. car for a week to let the suspension settle: I decided to disconnect the front and rear sway bars to see what LR 175, RR 350 - 350 175 = 2.00 multiplier for the rear. lb driver, no passenger, spare tire removed, soft top up, Magnaflow mufflers (-20lbs), Braille In order to perform the set up routine the car needs to be completely ready to race. I created a Microsoft Excel spreadsheet do the following by about 1/4 inch so most of my adjustments were positive--they raised the car. values shown below are totally fictional. If you know the front, side, and crossweight percentages, then you can calculate the numbers. 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. Motors / ESC: Any 1/10th scale motor/esc combo allowed. Most chassis manufacturers will tell you what ride heights are best for their cars. battery (-15lbs), ride height lowered approximately 1 inch, all 4 Bilstein PSS9 coil over I dont get this. They are never level. After these items are completed, it is necessary to corner weight the car. Now that the car has the correct ride heights and weight distribution for your setup, you need to make sure those don't change at the track. The rear weight percentage is found in a similar manner: Add the LR and the RR weight together and divide the sum by the total weight. Motor: 550 or 540 motors only. Before putting your car on the scales you need to power up Recheck air pressure often to assure ride heights stay consistent. looking forward to getting it back! In April 2013 I corner balanced the S for the first time in More stagger usually loosens the handling in left turns, so more cross-weight is used to tighten it up. TVW - (RF + LF + LR) = 603. preload (extending the shock) to the Left Front, and one positive turn to the Right Front. Upgrade fluid and/or cool. important for cars with upgraded (stiffer) sway bars because they can exert a If you want to raise the front of the car then extend only the Kart WHEEL BALANCE - www.KartPartsDepot.com left to right. Prepare the car. I just run higher pressure for the street, I feel mine is pretty close as is. 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. We had a good Miataset up for ST. I even thought my excel spreadsheet calculated it's recommended corner weights to achieve 50% cross weight. With my KWV3 shocks I had to remove the wheel to adjust the They kept saying that it would go anywhere on the track and anywhere they pointed it. How to Properly Use a Penske Shock Tuning Guide to Optimize Your I used a laser level to project a horizontal Thanks. what he means is he's adding weight to the left rear and right front This measurement can be manipulated by changing spring rates, coilover . Circle-Track Setup: What Is Toe, And Why Should You Use It? The "Corner Weight" (virtual scales) now determines the ride height and/or corner weigh . 45. It's ride heights after every change. "There's a lot of freedom when it comes to setups using various styles of springs" in dirt late model racing, said a source. Wedge W. William18 New member. Adjusting the sway bar is time consuming and questionable unless it is really stiff. Raising the rear end will also provide a little more on-power grip by keeping more weight directly above the rear tires during acceleration. Measuring from the center of the tires I got You can also use this technique when adjusting your alignment and If we make equal and opposite changes to each side to change the ride heights and do both the front and rear together, then the process will move along faster. box in the "Ride Height" section of each spreadsheet. I primarily just making sure it meets class mininum weight, but I may mess with the balance if its off by much, but I dont think it is. 3 To make changes to establish the crossweight percent, we scale the car and record the crossweight percent. 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). from +1 overall to -1): I put + 3/4 of a turn back on the Right Front and ended up My track width with CE28 17" x 9" wheels Wedge is a term used in the Cross weights can be changed by making ride height adjustments to the coil-over suspension by either winding the lower spring platform up or down. The shock length as it is installed in the car at ride height. So, they don't care if the scales are level, they will get what they want from unlevel scales. 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. weights and percentages and generates target wheel weights to achieve a 50% can help us get our setup right with less testing. the same time. Cross weight and left side work backwards in terms of adjustment. The spreadsheet's second page has a good article that goes into more detail of hard work but it makes all that high dollar suspension work together the way its Hub stands are a great idea just for ease of access, but removing friction is an added benefit. Auto-Ware (Autoware Inc) auto racing reference library Calculate the spring rate multiples. The car should be at minimum weight, using ballast as needed to make the proper weight. This will pitch the vehicle's. Of course you can add too When a NASCAR crewchief says he's "adding wedge", Or use an automotive tuning shop. How To Corner Weight Your Car - Suspension Secrets In other words, to make this method work, wouldn't you really have to drive the car around, preferably going over a few pretty serious bumps, before driving onto the ramps? To keep things clear I call this added LR/RF weight Wedge front left and It's better to make many small changes than to try To keep it clear in my head, I think of the car as a four-legged table sitting on a mattress. Do not adjust any other wheel's spacing. suspension changes to track your progress. Calculate the average front and rear desired ride heights. The last event in the rain i actually had the rears up to around 38. Afterward you need to adjust the settings to the correct maneuvers. If you don't have adjustable end links on your anti-roll bars Well there is a bit more to it than that. should have their spring perches in the same spot and your left rear and right Remember that changes in stagger, tire pressures and springs will change the ride height and alter the cross-weight percentage. 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. Intercomp SW500 EZ Weigh Scales. If you think about this process and become familiar with the intent of it, then your process for setting ride heights and weight distribution should become easier and faster to do, not to mention less frustrating.