- It is best to get 50 percent left-side weight when possible. need to roll the car back and forth a few inches several times, being careful ∆ Wedge Delta should be positive for oval racing. Basically so long as I don't completely overcook a corner entry, it does better than any car this heavy has any right to... Good stuff. want balanced turning in both directions. By David S. Wallens racers add "wedge" by adjusting the right rear spring perch--they Intercomp Racing 102030 - Intercomp Racing Hub-Mounted Corner Weight Scales. (Right Front + Left Rear) / (Left Front + Right Rear), When balanced the Cross Weight % will be 50%. You could also raise the left front or right rear ride heights to do the same thing. By lengthening or shortening a leg, it increases or decreases weight on the other legs. %, Bite = balancing see my corner balance how-to and It also has clinically assessed, dedicated fat burning ingredients to target weight … as Left Rear Bite + Right Front Bite. ∆, ∆ = change needed to get to target weight, Cross Weight = But in a right turn, the opposite occurs and the handling is worse. Avoids a mess on scale pads and tires, prevents dirt from contaminating lube. - Recheck air pressure often to assure ride heights stay consistent. The other two corners will gain weight. Zero the scales to make sure that no weight in registering on any of the corners, also make sure the scales are on a flat surface. Wedge is a term used in the Rear weight percentage for road racing and autocrossing is less definite. you run on the track. What happens if you breed this fish with a fish that only has Blue Scales. Here are some points to remember when weighing your race car: - Make sure the floor is perfectly level; use shims under the scale pads if needed. Of course you can add too   All rights reserved. If you get the car neutral in left turns, it oversteers in right turns. racers only turn left we can balance the car for better grip in left Cross-weight percentage compares the diagonal weight totals to the car's total weight. Corner weighting is huge. I noticed that the spreadsheet I'm using on the left of the picture sets my "target corner weights" to less than 50% (49.6%), why is that? Right now I have (IIRC) 350 lb front and 200 lb rear springs (koni sport, eibach pro line, ST anti sway bars)  . Those will tend to reduce friction and bind at the expense of NVH and added wear. The third, and probably the best, option seems to be to invest in a set of hub stands, as this not only takes care of the bind issues via their built-in rollers, but it just makes the task of doing the alignment a lot simpler as well. Additionally, it is much more difficult to change rear percentage much, since rear weight is mostly a design function. Corner_Balance.zip, Excel Corner Balance Spreadsheet Screen Capture. On the other hand, it drives really, REALLY good for being setup by this idiot behind the keyboard, and I really don't wanna spoil a good setup by chasing after a perfect setup... at least not yet. You can also estimate your car's You will have to repeat this every time you lower the car onto I plugged in a bunch of numbers into my calculator and it all checks out. On my ZX2SR my cross weight was consistently in the 49% range. Delta is equal to (Right Minimizing the hysteresis is good, but it also minimizes the shock/spring contribution to effective 'at the wheel' unprung weight (mass). There are many ways to corner balance a car. - Set tire pressures first. - Remember that changes in stagger, tire pressures and springs will change the ride height and alter the cross-weight percentage. I highly recommend using a laser level to confirm the 4 scales are level to one another. ###Setting Cross-weight: - Once static weight percentages are set, work on cross-weight percentages. bite, a negative value means the Right Rear is favored. are favoring the left rear tire for better acceleration out of left This device comes with precision sensors to deliver the most accurate measurements you can think about. This means the driver should be in the car, all fluids topped up, and the fuel load should be such that the car makes your minimum weight rule at the designated time-usually after a race. - If you raise the ride height at a given corner (put a turn in or add a round of wedge), the weight on that corner will increase, as will the weight on the diagonally opposite corner. Note your ride heights and | Posted in It puts power down better, and any decent FWD car will be carrying a wheel in the air around a turn anyway, so by default the outside rear gets 100% weight transfer when it's being asked to turn anyway. racers discovered they could insert an actual wedge into the left rear I had the same question. You’re always going to have some friction, especially depending on the type of suspension used. oval racing world and is simply another word for Cross Weight. Wedge Delta can also be thought of Now that's pretty cool! To keep things clear I call this added weight Wedge Delta lowered onto the scales the tires will need to spread out to unbind the Capacity, Each. If you do have adjustable end not to push it off the scales, to unload the suspension (as the car is ∆, Left Rear = springs to put more weight on the left rear (and right front) tires and Because it's targeting LF/LR = RF/RR to equalize the left vs right handling characteristics. I will say that if I'm starting on a fresh setup, or the car has been lowered, or I find myself making massive spring perch changes, then I will loosen all of the suspension bolts so that the bushings can relax and find their new happy place. I retighten them after I've made all my adjustments. These tell us all we need to know about the setup relative to the weight distribution. 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. 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. It's always possible that there's something wrong with my scales - I'll call their manufacturer and get their input an recommendations, and I'll let everybody know what they say. Then move components like the battery or fuel cell. It varies with weight removal, added. Lay the bag flat onto the scale pad, partially open to vent, lower the car into the bag. If we are talking of weighing a stock type vehicle, not a lot can be done since there are no adjustable parts. 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. To get good accuracy easily make sure you get the low hanging fruit first like removing the friction between the tires and the scales so there is no bind. Cross weighting is crap for road courses and only applies to turning one direction OR if the car is about 50/50 F/R weight to begin with. One of the most important aspects of car setup is the static weight distribution and the cross-weight percentage. This feature makes it one of the best weight watchers scales in the market. I highly recommend using a laser level to confirm the 4 scales are level to one And what do you mean by "lots of bearings"? Bearings, like sealed roller bearings, solid bushings, or spherical joints. Always retract the right rear tire which puts more weight on the Left Rear and If most of the important turns on your more traction or bite in left turns. The angles are another way to set the suspension for the desired ride height and cross-weight percentage. Equipped with a large LCD display which is also detachable for easy viewing. A strut with its innards removed? To determine accuracy, we tested each scale with calibrated five-gram, 10-gram, 100-gram, and 500-gram weights. anti-roll bar with the end-link adjusted so it's easy to insert the Rock or bounce the car helps. Unless you have some kind of stupid hyper-critically damped NASCAR type dampers this isn't really necessary. For road racing and autocrossing, the ideal left weight percentage is 50 percent. The weights were tested multiple times on the centers of the scales as well as each corner, to ensure that accuracy wasn't dependent on where the weight was placed on … to balance your car in one big step. Can do to just left sides or right sides, or to all 4. This keeps the ride heights as close to ideal as possible. Beyond that, if your bushings and other parts bind on the scales then they're also going to bind out on the road, so who cares? the scales. - To add weight to a given corner, raise the ride height at that corner or lower the ride height at an adjacent corner. Even on a track with mostly right-hand turns, the problem in the left-hand turns costs a lot of time. Also double check that the typically not concerned with bite and wedge delta because they usually CG Height Calculator, Cross Weight % = Don't just blindly cross weight it thinking it's the "right" way. From pharmaceutical manufacturing to logistics operations, a weight scale for heavy weight is a critical piece of the process. The EatSmart Precision Digital Scale is a simple, easy-to-use scale for anyone who wants a tried-and-true product with an unobtrusive design. When a NASCAR crewchief says he's "adding wedge", can help us get our setup right with less testing. I've read all the info before, in various places, but it's good to have a refresher. Intercomp Racing 102030 - Intercomp Racing Hub-Mounted Corner Weight Scales. - Put the driver weight in the car, preferably the driver. Or it could also be possible that the signal is smoothed in the programming. 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? It's one reason why racing pushrod suspensions tend to employ geometry with minimal shock/spring movement, requiring ultra-high spring rates and very high damping force shocks. Wedge Delta and what values work best for certain tracks and conditions I've had my cars corner balanced a lot, but never really looked into the science of it. The other two corners will lose weight. %  50% is optimal, Wedge = | The PB is able to be connected to Ticket printers or a PC via RS-232C interface. ∆             Right Front = RENPHO Digital Bathroom Scale, Highly Accurate Body Weight Scale with Lighted LED Display, Round Corner Design, 400 lb, Black 4.6 out of 5 stars 18,406 $16.99 - $17.99 For example, if your initial setup is 52 percent cross-weight, and you want 50 percent cross-weight, lowering the right front or left rear corner will decrease cross-weight percentage. In the example at the beginning of the article, this was the problem: a cross-weight percentage that was less than 50 percent, and probably off by at least two percent. I don't like the lower weight ratings and plastic scale pads of proform. Weight Scale, Hub-Mounted, Corner, Blue Powdercoated, Steel, 1,500 lb. }); Static weight distribution is the weight resting on each tire contact patch with the car at rest, exactly the way it will be raced. The design has the engine and transmission scooched over to the drivers side so the drivers side weighs more empty. Right Front tires. %   Wedge Delta will be 0 at 50% Wedge. Car Corner Weight, Wedge and Cross Weight Calculator. My car is a 1987 Honda CRX, set up according to ITC class rules. Step 1: Determine the genotypes of the parents.              Right Rear = %           Right Weight = Like stories like this? front left and R R = red fish. Kitco's aggregated sources include some of the top newswires in the world including the Association Press, Canadian Press, Japanese Economic Newswire, and United Press International. %    right swapped). - Move ballast first, since it's easier. | Never miss an article. This article is from a past issue of the magazine. Using dead strut inserts could be an option for cars with strut suspension. Bite should be positive for oval racing, Wedge = I'm off by 0.1% (see numbers on left side of the spreadsheet). Maybe there's some sort of bind in the scales. Thanks;  what you say makes sense, of course, but repeatability is always going to difficult unless you can get rid of most of the bind, right? [ Up ] [ Corner Balance Calculator ] [ CG Height Calculator ], This calculator takes your car's four wheel weights and calculates current Do you have recommendations for such corner weight percentages? Setting static weight distribution and adjusting cross-weight percentage is one way to assure good handling. Why? Left Front weight: Here's a poor mans way to reduce the effects of tire scrub/binding when the car is lowered onto the scale pads: Spray Pam into open bag to coat and lube the inside, rub the bags between your hands to distribute. My car has solid/spherical bushings everywhere, so there should be very little bind from them. Wedge Step 2: Set up the Square I would imagine that disconnecting the shocks is only applicable to setups where the shock and spring are separate, like a lot of solid axle cars, or Mk2 Supras in my experience. Are they non-adjustable? From tacos in Dallas to scales from Target, Kamaru Usman recalls self-doubt on crazy journey to UFC 251 Blue Corner By Simon Head , John Morgan January 31, 2021 5:45 pm Digital scales use batteries and display your weight on a screen. Bite tells us how much we What you're saying makes sense, but I can't explain why it took so long for my car to settle into its final weight reading. Since this article still gets a bunch of traffic, just bumping it up. - To increase rear weight, move weight as far back as possible. googletag.pubads().enableSingleRequest(); We've created this Certified Public Scale locator to make finding a scale easier for your PCS move. Make sure you check the maximum weight that the weight scale can measure. These are less suitable for heavier loads such as bathroom scales, where a person's full weight, not necessarily centred on the platform, is better supported by 4 load cells supporting the 4 corners of the platform. On a road course, the cross-weight percentage should be very close to 50 percent, within a half-degree either way, to keep the handling balance similar in a right-hand turn compared to a left-hand turn. Part Number: ICP-102030. Rolling the car onto the scales from a small ramp that's the same thickness as the scales seems like a better option, but does it truly remove all the bind? I have now added the ratios so I can visually see what's happening. This can make maneuvering in traffic difficult, even dangerous. The left weight percentage is found by adding the LF weight to the LR weight and dividing the sum by the total weight. - To add weight to a given corner, raise the ride height at that corner or lower the ride height at an adjacent corner. ... You need a nice, flat and level surface for the scales. To favor right turns, put more weight on the The front will show close to 60%. turns. They kept saying that it would go anywhere on the track and anywhere they pointed it. But stagger is not a good idea on a road course or autocross either, where the ideal is 50-percent cross-weight and no stagger. Proforms are cheap scales. track are left turns then having more weight on the Right Front and Left Rear These are your target weights which will yield a 50% Cross Weight: Left Front = You need a nice, flat and level surface for the scales. Small angles can throw off your readings significantly. In almost all cases, the loss of cornering performance in one direction is greater than the gain in the other direction. It's stuff closer to 60/40 or 40/60 where you need to stray from crossweighting. For street cars it certainly can be. positive Bite and positive Wedge Delta. Then if it's for a particular road course, you will find several seconds optimizing for select turns and throwing any of the above methods out the window... A friend's Chump Car found 2 sec at VIR making it turn right better than left. B B = blue fish. balance is complete put someone in the driver seat and reconnect the Thanks. Etekcity Scales for Body Weight, Bathroom Digital Weight Scale for Body Fat, Smart Bluetooth Scale for BMI, and Weight Loss, Sync 13 Data with Other Fitness Apps 4.7 out of 5 stars 26,814 $22.78 $ 22 . More stagger usually loosens the handling in left turns, so more cross-weight is used to tighten it up. The Rockler Clamp-It® Corner Clamping Jig eliminates that frustration by providing another set of ''hands'' to hold your parts together. 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. However, many cars cannot make the 50 percent left-side weight percentage due to driver offset. what he means is he's adding weight to the left rear and right front Or am I missing something? Kitco News collects and features the top financial, economic and geopolitical news from around the world. The car literally registered several hundred pounds less that what the weight finally settled at after I jumped up and down on the door sills for several minutes. - To increase left-side weight, move weight as far to the left as possible. I can see binding throwing off each corner’s weight but the sum should be the same. If you have 50/50 weight distribution to begin with the note that crossweighting will do the exact same thing. Jacking weight will not alter the left side or the rear percentages. which is simply the difference between the two diagonal tire weights. If you shocks are working normally they are not worth worrying about. © 2021 Motorsport Marketing. For pure race cars this isn’t a consideration. To connect your Fitbit account in the Weight Watchers app: Tap the profile icon in the top right, then tap the gear icon. Ah, OK, thanks for the clarification. - You cannot change the left or rear percentages by jacking weight around in the car, although this will change cross-weight. Today's oval 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. Be sure to have the weight of the driver in the seat. scales are connected properly--you can really screw up your suspension settings Picture the following: Your car is really fast in right-hand turns, but understeers in left turns. Road racers are So as long as you are draining the fluid from your shocks, also remove or cut away the seals. much Wedge Delta and make the handling worse. ###Setting Static Weight Distribution: - Check static weight before working on cross-weight. When Wedge is balanced at Guess I have to try it. document your current ride heights and your coil over changes each time Interested in hearing peoples' opinions and (preferably) experiences. ###Change at the Track: - Make small changes at the track, and make only one change at a time. googletag.enableServices(); dry)! You've tried springs, shocks, different bars, neutralizing the anti-roll bar, and nothing seems to work. I weigh 220. By Rob Robinette.        Right Rear weight: <  Enter your corner weights in pounds or kilos and click 'Calculate'. Basically, I don't see much of a relationship between 'static' corner weighing via adjusting spring length and the addressing of fundamental L/R weight imbalance as those difference are what drive suspension and mass motions when moving. The RENPHO smart scale features a tempered glass platform with four sensitive silver electrodes in each corner, measuring weight in increments of 0.2 pounds. Take care that the car does not accidently slide off the scale pads. - It is best to make small changes at each corner, instead of a big change at one corner. To keep it clear in my head, I think of the car as a four-legged table sitting on a mattress. Adjusting the sway bar is time consuming and questionable unless it is really stiff. Cross-weight is also called wedge: If the percentage is over 50 percent, the car has wedge; if below 50 percent, the car has reverse wedge. Cross Weight or Wedge. Same goes for for swaybar endlinks. To calculate cross-weight percentage, add the RF weight to the LR weight and divide the sum by the total weight of the car. Funny. Using dead struts and lots of bearings will help. Even 1/8 inch difference will make a difference, especially if you have I used a laser level to project a horizontal - Use blocks the same height as your scale pads to move the car off the scales to make adjustments. For example, if your initial setup is 52 percent cross-weight, and you want 50 percent cross-weight, lowering the right front or left rear corner will decrease cross-weight percentage. More wedge means that the car will likely understeer more in a left turn. So 2.5" springs and experimenting is the way to go-  I think I know that much..  . I dropped my integra off at edge to have this done today. 78 ($22.78/Count) $24.99 $24.99 We had a good Miata set up for ST. For information on corner Hardy Bench Scales are available in either stainless or carbon steel base construction, with 304 Stainless Steel platters. 50% then Wedge Delta will be 0. As experts in bathroom scales, we wanted to share with you a few facts about digital scales.We’ve summed up our customer’s frequently asked questions into the following important facts about bathroom scales: #1 Every time a digital scale is moved it needs to be calibrated. Before putting your car on the scales you need to power up Light weight and easy to carry! Since oval - If the car understeers or oversteers in only one direction, check the cross-weight percentage. So LF/LR = RF/RR is what you shoot for. center of gravity (CG) height by using this page: My big stumbling block on this subject is how to get accurate readings by removing all the friction/bind from the tires, sway bars, bushings, etc. Taking the time and making the effort always pay dividends. I see disconnecting the sway bar, and how to do it, but disconnect the shocks? If the person reduces the force with which he's pressing against the ceiling, the weight read by the scales will decrease. this excellent article: Hub stands are a great idea just for ease of access, but removing friction is an added benefit. 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. Thanks for posting this. I commented on this to the youtube video on TIG welding, where they put their C5 Vette on scales and had a contest to guess the weight correctly, so I apologize for the duplicate posts. My left rear is something like 150lbs heavier than the right rear, with both fronts even at ~740lbs each on a 2425lb FWD car. A jumbo ziploc bag prevents lube from escaping when not in use. Now, I didn't have the sway bars disconnected, not did I put anything slippery between the tires and the scales - I just wanted to get a quick look at the total weight of my car, but the amount of error caused by all the friction was pretty startling. Wouldn't the fact that it is front wheel drive change at least the front to rear percentages? Or maybe I read the post wrong. I put the car on grease tiles so the tires move freely on the scales and then I bounce each end a couple times. Right handers vs left handers feel quite a bit different-I run out of suspension on right handers much more often, and on left handers the car loves having me hanging out over the inside of the contact patches working the corner. Bite = Left Rear - Right Rear and a positive value means the I didn't  hunt for that missing 1 %. Road racers can take a page out of the oval racing book and - Make sure the tires are centered on the scales. - The only way to change static weight is to physically move weight or ballast in the car. anti-roll bars then leave them connected. Bite and Wedge Delta are One of the best features of the Precision Digital Scale is its large 3.5-inch LCD display, which users say is easy to read even in the dark thanks to a backlight. A 50% Cross Weight will yield a balanced handling car, one It still pays to be thoughtful about weight placement fore and aft in your car. The only way to change the static weight distribution percentages is to physically move weight around in the car. When a fish has the genotype B R, it has a patchwork of blue and red scales. Yeah, I'm a little puzzled by my result when I let me car down on my new scales as well. I use 2x6 wood planks as ramps to drive the car onto I don’t get this. I've actually lowered a miata a decent amount just by forcing the bushings around. This article explains everything pretty clearly and I feel like I could tackle the job myself now! I was surprised to find, contrary to my experience, that the Vette came is very close to its expected weight as soon as it was let down on the scales, without having to take bind out of the suspension. used linoleum tiles to shim two of my scales to get them all level. 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. googletag.cmd.push(function() { Equal weight on each front wheel, same on the rear. So if you have 60% on the front , you should have 30% on each front wheel. Double check the scales do not need charging, and if possible get somebody else to stand on each scale to make sure you have the same readings and … All When working with static weight distribution, we use two percentages to analyze the car's corner weights: Left weight percentage and rear weight percentage. Not Yet Reviewed. I'm not saying you get what you pay for with race scales but there is a reason I went with longacre. Extra decimal place that also makes it possible to monitor fine weight changes with heavy tare weights Auto-centering pan to avoid corner-load errors and ensure higher accuracy (option for MC-1000/6100/10K/30K) Weigh Modules AD-4212L Series (Capacity : 51 g to 110 g / Readability : 0.001 g) Powerful vibration cancelling filter As an autocrosser I've always thought that cross weight should be set at 50% and be done with it. All 4 scales must be within 1/8 of an inch. I'm anxious to see what Proform says about my experience. They're made by Proform, and are quite a bit less expensive than the ones made by Intercomp, but they got good reviews. The situation is frustrating. How would you make something like that? - Changing the ride height at any corner will change the cross-weight percentage.