Excessive front toe in will make a car turn into a corner quicker, & may create a loose condition. The tiles & salt seemed to help because the weight never , Left Rear = 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. So if you have 60% on the front , you should have 30% on each front wheel. To do this, we add five rounds of pre-load to the RF. I gave up on running adjustable end links on I don't see how this is even possible with a strut type suspension like mine, or with any coilover setup, for that matter, since the weight of the car sits on the collars that go around the shocks/struts. is especially true if you don't have adjustable spring perches. A jumbo ziploc bag prevents lube from escaping when not in use. you raise the rear of the car 10 inches or more and re-weigh it. You can make this adjustment in several ways: If you don't want to change the ride height of the car then Bite = Left Rear - Right Rear and a positive value means the The ride heights are critical to the geometry settings on the car and the static weights help determine where our loads end up on the track in the turns. center of gravity (CG) height by using this page: line above the scales and then stood on each scale and placed a ruler on the top Bounce the car at each corner to free the suspension from any bind, then roll the car onto the scales. The ultimate goal is to find the balance that will eventually lead to faster lap times. It would just automatically settle. If your car's diagonal corner weights are not equal then its handling will be Or use an automotive tuning shop. Custom iRacing Setups and Paints for dirt oval and asphalt oval cars. You can see in the "Target Corner Weights" section that the Left Full of fuel, everything done, full of oil, lead bolted down. Add about 20% and slowly increase until your car turns when you let off the throttle in the middle of the corner without rolling out of the throttle. The salt acts as tiny ball bearings and will allow the tires to rear. Toe inn a 1/4 inch. Note your ride heights and Plan to win in a repeatable fashion. left to right. Cross-weight percentage compares the diagonal weight totals to the car's total weight. Kart WHEEL BALANCE - www.KartPartsDepot.com If you do have adjustable end That is because all of the points move together. Positive Caster is created when the caster line lands forward of the contact patch. One of the problems with cross-weight is that it will change the handling balance from a left to a right turn. 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. 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. scales are connected properly--you can really screw up your suspension settings 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. Corner weighting is huge. The overall effect is much like having no shock in the equation. All 4 scales must be within 1/8 of an inch. left to right (measured with a digital caliper) and my ride height was pretty 5. Spring Rate Calculator - Ridetech used linoleum tiles to shim two of my scales to get them all level. The total spring perch 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. Measuring from the center of the tires I got I recommend adding an eighth or slightly more to the lowest corner just to make sure you pass tech. Some racers like to take matters into their own hands-and that's OK. The situation isfrustrating. 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? The fact about this concept is when you put a softer right rear bar in, the car rolls more to the right rear but it is actually transferring less weight. A good starting point would be tank of gas. 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 carry the wheel load, the spring must be compressed quite a bit. The other two corners will lose weight. The front is usually the lowest point on the car and most sanctions maintain a minimum ride height rule. 4m.net - The Most Opinionated Racing Message Board In The Universe. We should now be at, or near, the desired crossweight percent. If most of the important turns on your Taking the time and making the effort always pay dividends. Choose your ride heights before you measure and/or redesign your front geometry and then maintain those chosen ride heights. "Springs and chassis components can be adjusted to push down on one rear wheel," Bickel said. If you shocks are working normally they are not worth worrying about. I had the same question. How to Adjust iRacing Sprint Car Cross Weight AKA Wedge Maybe there's some sort of bind in the scales. I mainly run the 3/8. Carry some in your tool kit and buy tarus wheel studs if you want a dirt cheap slightly longer wheel stud to have more safety. I highly recommend using a laser level to confirm the 4 scales are level to one shocks set to same length left to right (front to rear will be different). PDF iRacing Set-up Guide important for cars with upgraded (stiffer) sway bars because they can exert a Weight Training: Everything You Need to Know About Race Car Weight Are they adjustable? "weight jacking," or "scaling," involves adjusting the spring perches of a car Comet Kart Sales - Karting 101 - Getting Started in Kart Racing The coiloversare typically mounted parallel to the centerline above the driver footwell. 3. 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. Intercomp 102030 5X5 Hub-Mounted Corner Weight Scale. Adjust the front up by 0.0625-inch and the rear down by 0.4375-inch. RC Dirt Oval Basic Setup & Tuning Guide (21.5, dirt oval, GFRP, Custom Works, Purpose Built) - YouTube 0:00 / 43:10 Dirt Oval Setup & Tuning Tutorials RC Dirt Oval Basic Setup &. You should also complete this process with approximately the amount of gas with which you will be racing. Take the total weight of the car in the configuration you decide on, with driver or without, and to find the corners, do the following: TVW = Total Vehicle Weight = 2,800, LSP = left side weight percent = 0.54, FWP = front weight percent = 0.51, CWP = Crossweight percent = 0.52. RC Oval racing is probably the easiest form of RC racing right, right? It was a good car. I just back all of the damping off totally. How To Corner Weight Your Car - Suspension Secrets suspension changes to track your progress. rear and tried again but I still needed more weight off the right front and left My car has solid/spherical bushings everywhere, so there should be very little bind from them. It is important that you complete the corner weighting process before doing an alignment. 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. Raising the rear end will also provide a little more on-power grip by keeping more weight directly above the rear tires during acceleration. Your car may be designed to run different ride heights than these. Dirt Track setup - heymow.com Battery: 2 cell lipo max Multiply the wheel load of 685 times the motion ratio squared, 1.3611 times the shock angle cosine squared of 1.1056 and we get 1,030.8 pounds of spring preload. We have 4.1875 front and 5.1875 rear. R. racing junky Member. Here's a box stock 2006 Honda S2000 with 5/8 of a Tell the shop you will be disconnecting the rear sway bar when obtaining the estimate. Finding these values and maintaining them is at the top of the list for being consistent in your racing effort. You need to follow distinct directions to set up your RC for a dirt oval. I stretched my tires to get the RR right and now I'm . Check static weight before working on cross-weight. I put the tiles on top of the scales. front left and Kart Scaling & Weight Distribution - Woodbridge Kart Club Some engines are used in two different classes with the only change being exhaust system. Now, look into details about the matter. you run on the track. 3) Reverse stagger: The opposite of stagger when your left side tires are . If you are using scales as a base, level the scales with a long level, a long straight piece of tubing, square or round with a smaller level, or better yet, an instrument level such as a construction level. . . anti-roll bar with the end-link adjusted so it's easy to insert the that as a result the coil springs must bequite beefy and stout, 600 lb/in or more. Keeping track of Bite and It will let you predict and understand the effects that various modifications have on handling, performance and lap times. two years. Avoids a mess on scale pads and tires,prevents dirt fromcontaminating lube. You can also use this technique when adjusting your alignment and 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.
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