321. Roll Center or Moment Center. Still having problems? It is a low acid tomato with a unique flavor that has been described as sweet, yet slightly tangy. Rear Geometry Adjust the cross weight for more extreme conditions or different circumstances. This was taken at Butler Speedway in Michigan. Subtle changes often go unnoticed, especially when they're hard to see without jacking the car up and crawling underneath. This guide covers much of the basics for the less experienced sim racer as well as a troubleshooting section that should help reduce your lap times. We had LF 1000, RF1300, LR 200, RR200. Camber was -2 deg on RH and +2 deg on LH at ride height. Location:Austin, Tx. Click. The less fuel in the tank the tighter the chassis will become. *-*. Setup Tools. The more third link angle you have, the more antisquat there is. Alignment issues are defined as: A. rearend alignment, B. contact patch alignment, C. driveshaft to pinion/transmission alignment, and D. engine alignment. Anderson , IN. The fruits of this plant are large and can weigh over one pound. The moment arm is 5.5 inches for the Late Model and is much easier to set up. The set-up really planted the RR tire. the radiator. by . ; C1 - Designed for medium to low brake temperatures and provides good cold bite while being rotor friendly. Bump Springs Tech. Has gone 1.29 60 ft on spray, has 28 10.5 et street tires on it also. Good luck. Current Stock: Quantity: Decrease Quantity: Increase Quantity: Save to Wishlist. 5. Only at teamsimkins.com. The proper steps to do this are outlined below. The control arm angles affect the rear steer and the third-link angle can redistribute load upon acceleration. Plan your shock layout by comparing the stiffness of one to the other corners and to the spring stiffness at the corner you are trying to control. Turn the wheels to the left all the way, make a mark with the steering wheel, now count the turns it takes to go to full lock the opposite direction. Filter by. Wheels. Much of the same information translates over to NASCAR Racing as well. In Stock. A tight condition is the number one complaint from drivers. The metric cars at THR may be as competitive as the camaros but at CC they were not even close untill we were allowed to change to 3 link and a panhard bar. Less fuel equals faster speeds. I drive both a metric (my truck) and a leaf spring car (ss). where can i get info on the set ups for a metric chassis short track dirt car, Do Not Sell or Share My Personal Information. Chassis. CRA street stock. This tape
Chassis Setup Docs Hyper Racing. This will loosen the car, and that's undesirable, especially on dirt. rolling chassis. I was just trying to help a guy asking about what is done to the chassis. Car went anywhere he wanted and was quick time, won the trophy dash, heat . That's just a thought, i don't know that for sure. JavaScript is disabled. It has been found that the misalignment of your tires/wheels presents serious drawbacks to a finely tuned chassis and setup. Street Stock Tech. men need when considering these types of changes. Coreless Stretch Film; Pre-Stretch Film; Hand Roll; Machine Roll; Jumbo Roll; Industrial Plastic Division. Even when clear rules exist, the track officials are often reluctant to enforce them. Thank You, DreamRacing.com offers a chance to go racing
Fast And Furious. See All - Best Selling. Free . The right-side tire contact patches will also need to be inline with the right front tire pointed straight ahead. The front moment center (MC) location plays a huge role in how the front end wants to work. I think if I had the opportunity I could make the 4-link work on asphalt using a similar set-up that I used on dirt. 358101 FAB . We can lower the rear RC by making changes to the mounting points. If you have any problem with the download, just email me, and I will email or Facebook you your file. When the LF is too cold, the RR spring is too soft. We had no idea how popular and successful this line of chassis would be. Nick and I agree on something! The overall general rule is that the angles between the driveshaft and both the pinion shaft and the transmission output shaft need to be equal and in opposite directions. We also might want to change the locations of the chassis and/or rearend mounts for the links. How to Lower the Cross Weight in an iRacing Setup. SUCH AS SPRINGS, SHOCKS, SWAYBARS ETC. Antidive helps prevent sudden nose dive on entry by mechanically resisting the downward motion of the suspension using the rotational forces created through braking. We even did pretty good with it in the THR LLM class back in `99. Order Wilwood part number 150-9442K. When this book was originally published in 2001 it was specifically for GM Metric chassis (78 or newer Malibu, Monte Carlo, Regal and Cutlass cars) racing on asphalt. The number one reason a car will be tight and not want to turn is because the front end is not designed properly. Quote. Not that you can't get the same handling results with shims, etc., but it's a whole lot easier to adjust the handling of the car with weigh jackers. The upper BJ is trying to be forced in a forward direction and the lower BJ is trying to be forced in a rearward direction. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Your email address will not be published. Street Stock Setups - Custom iRacing Setups and Paints for dirt oval and asphalt oval cars. You can then make fine adjustments with the sway bar preload if desired. Conversion to Race Car When we convert a Metric four-link suspension to a racing application, we need to be aware of several important factors. I want to try a reverse spring set up on a hobby stock car that am helping a friends with its a 3400 lbs metric car all stock. As you will gather from this book, setting up your car right and properly maintaining it is a lot of work. The front geometry on a metric car isnt as good as a Camaro though. Page 1 of 1. They aren't expensive to buy or install, WB shocks are the same price as stock mount ones and bolts allow for much easier tuning. Adjust all four spring perch offsets to change the cross weight. The engine should always be aligned perpendicular to the rearend and/or parallel to the centerline of the car. 4. You might try a little trail braking. Prices listed are with a frame swap option. -3 . 03 0@ 34-.=- 2 ++(+'o $ (&%q qqqqqqqqqqqqqqqqqqqq ,&%q qqqqqqqqqqqqqqqqqqq qq (,%q qqqqqqqqqqqqqqqqqqqq ,,%q qqqqqqqqqqqqqqqqqqq qq Posted August 22, 2005. In an effort to clear up some of the confusion over all the setup options included within NASCAR Racing, I decided to put this guide together to help you better understand what, why, & how adjustments are made in the sim. The rearend needs to be aligned at 90 degrees to the centerline of the chassis and/or to a line through the center of the right-side tire contact patches. Adjust drag link accordingly, *unless something is bent, spindles, drag link, idler arms, etc. Roughly 8-10 degrees of third link angle is sufficient to promote antisquat and not hurt your corner entry. This configuration is common in General Motors cars built in and around the 1980's as well as some Ford cars, such as the Thunderbird, from the same time period. The images used are taken from the iRacing Super Late Model setup screen. . Some people add preload to the sway bar to make cross weight adjustments. Save these setup files to C:\Documents\iRacing\setups\dirtstreetstock\. We must develop ways to create more rear traction on acceleration only. The idea is to steer the car using different height holes for the rear control arm mounts. If the camaros are allowed adjustable rear shackles and are allowed to use different lowering blocks then they already have weight jacks and are allowed to adjusted rear roll center. How to Raise Cross Weight in iRacing Setup. I have found that these are the best ways to adjust iRacing setups to suit your driving style, or to handle better under different temperature conditions. A trend must prove itself in order to stand the test of time. These components include the radiator, oil/transmission coolers, & brakes. How about just adding a panhard bar to the stock four-link setup? Once the setup has been balanced and the shocks are decided upon, we need to evaluate the turn-entry characteristics and the fact that brake bias is a very important influence at this segment of the track. In order to slow you must lose (kinetic) energy. Dec 24, 2005 at 5:33am. Add to Cart. Cra bomber, turbo ,etc. Why Lower The Rear RC? LOL. Make small adjustments, about one half of one percent. I would suggest going to www,4m.net to the tech board. Dial In Your Metric. Its hard to say without more information. Did you see anything interesting? var email = "RacelineCentral"
And I do agree weight jacks don't cost much, sure is alot easier to do the same thing we were doing with hidden couplers and shims . Online: $349.99. It just won't work. Although Im sure youre backing up your corner and lifting early, it can still wear the right front because the tendency is to lift as late as possible which can cause a faster corner entry than you might realize, causing the RF to heat up. Manyof the ideas fit into the gray areas and some of them are outright cheating. Once you've made the entry to the corner balanced, check to see if the adjuster is centered. I think that since SAS is more of a momentum track and the metric cars may not have such a disadvantage. Long exposure, Nikon D810. Russet mites are a type of pest that can cause damage to leaves, stems, and petioles. What Are Russet Mites? These are the general rules unless you are trying to "tie down" a corner. We can run different sized lowering blocks, but that is not the same as a weight jack from a "quick adjustment" perspective. Adjustment Guide - Medieval Chassis. Since the braking forces are in the opposite direction, there is a serious resistant force created which helps prevent the front suspension from moving in compression too quickly while braking. In 2005 Victory Circle entered the world of dirt racing. Johnny likes a softer feeling car, front and back. The settings, including the moment center location, really do dictate how all of the other parts and pieces of setup will work. Next is engine set back if allowed. 2. First, we don't want to restrict the movement of the arms too much. We also need to establish a ride height that will both be appropriate for our type of racing and also help to establish the best roll center height. If the car feels as if it wants to break loose under throttle in the center or on corner exit, or drive off the right rear wheel (wheel spin), increase the cross weight. All customers interested in purchasing, repairing, or setting up a Howe-Eddy modified should contact Travis Eddy at Eddy Performance (989) 948-8005. The reason I say that with confidence, is because I have gone up against more aero efficient cars with setups and body configurations that were aero-deficient and still out ran them. Forum Actions: Forum Statistics: Threads: 4; Posts: 10; Last Post: I-44 Speedway-Jeg's Master of. Do not seek aero downforce at the expense of aero drag increase. Conclusion The Metric four-link rear suspension is here to stay for a while. My name is Rodney Arndt, I have an associates degree in automotive technology. Excessive front toe in will make a car turn into a corner quicker, & may create a loose condition. This would mean we could align the driveshaft from a side view inline with the tranny shaft and the pinion shaft with no angular deflection. The cross weight adjustments should work on all dirt cars except the Sprint Cars. I can't tell you how many times I have refined the MC location in a car and had it totally change the way the car turned, for the better. View all S3SS. It is not advantageous to have the rearend steer to the right at any time on asphalt. The setup we choose needs to be arranged so that the dynamics are balanced between the front and the rear suspensions. 2.Now set toe out. The rear roll center is certainly part of the problem. There are some different lower a-arms and front suspension things to make them even better. the force of air. If one corner of the car is shocked stiff, then as that corner desires to move in compression, more load will be retained by that corner as well as the opposite diagonal corner of the car during the compression cycle only. 1 being the most important. Raising the rear of the lower links also lowers the rear RC, although in reality this is very hard to do because the links are already mounted close to the rearend axle housing. Posted October 3, 2005. If the car is tight under throttle, or driving off the left rear, invert the spring perch offset adjustment procedure above. A slight amount of rear steer to the left has been shown to help provide more traction at the rear and bite off the corners where it is needed. I set the car up a particular way last year and won a heat race with my street stock in the late model class at HRP. This chassis utilizes our very popular double slotted strut style front clip. Over the years, most of the things that I have learned about racing, I've learned the hard way. Leaf springs are important when towing heavy objects.Bear with me here, this digs a little deeper into how leaf spring suspensions work. Additionally, modern pennies are only 2.5% copper, so older pennies should be used instead for better results. Did they allow weight jacks? Here is a synopsis of how camber effects the handling of the chassis: Here are the diameter choices of the bar: The grill tape option is located under the drivetrain/aero tab within the garage menu. I will post as I no longer race, the biggest thing is the angle of the upper and lower control arms in the rear, you need to understand roll center and instant center to be able to adjust it correctly. How do I adjust the cross weight in an iRacing setup? in Exotic Race Cars on a Real RaceTrack, Copyright 2000-2023
I also vote for weight jackers in ALL SS or Sportsman level cars simply because they're so cheap and make life so much easier for the teams. If we can lower the Metric RC to 13 inches, we would increase the moment arm length in the rear to 4.5 inches and that's a huge improvement in compliance. If you could slide the MC to the right, or outside of the turn for you road racers, the front end will get stiffer. The cameros have been better then the metric cars at SAS for years,they used to let the metric cars raise the spring pockets in the rear if I remember right,I don't remember what else they were allowed to do though to be competitive. We showed you the 3-link rear end last week. To add weight to a given corner, raise the ride height at that corner or lower the ride height at an adjacent corner. I'm thinking about building a B Body for dirt track racing. I better get the torch and welder dusted off! That is the best description of the result of the dynamic force that influences each system. You can try bigger adjustments if you cant tell much difference in the handling after you make smaller adjustments. Forum Actions: Forum Statistics: Threads: 1; So, here is, in order of logic and importance, a list of setup parameters we need to address to make our cars fast and consistent. That troubles me. document.write("" + "")
They should also be able to run any panhard bar. But the most useful rear steer will only occur on acceleration and not at mid-turn. Setup Tips for Metric on asphalt racecheep. The Metric four-link Roll Center The metric roll center is quite high compared to other rear suspension systems, such as the three-link with Panhard bar, the leaf spring system, and the Watts link. If those desired angles are different, then we term the setup unbalanced. For a better experience, please enable JavaScript in your browser before proceeding. Caster is best described as a vertical line that runs through the 2 pivot points in your car or trucks suspension. I remember qualifying times in the 19.6 to 19.7 range. Try one or two click on each spring perch shown above to raise the cross weight. It may take a few test sessions to help you determine your balance, but if you observe the indicators correctly, then tuning the car for dynamic balance can be done. Last couple of years I ran the car we just used tubular ones with rod ends because it was legal and easier. Send your request to bob.bolles@sorc.com. I never felt good about cheating but when everyone does you need an even playing field. That energy has to go somewhere, (1st & 2nd law of thermodynamics) so it can either go into tires causing them to heat up lose grip and wear faster, or you can try to take up some of that heat up into the brakes where it will be dissipated on exit and down the straight. Biggest change is getting ride height . Lift earlier, and/or drag the brake just a little bit on entry. For the lower links, lowering the chassis mounts at the front of the link lowers the rear RC. This will help keep your ride heights in the ballpark. Reply #9 - 05/01/09 at 8:00pm. The overall work that a shock does is to resist the rebounding of the springs and control the speed of compression. Your close on the springs if the car is 3200. Before you start your season, you need to create your Refer to the images below. Quick view. I talk to lots of racers representing every form of circle track racing in every region of the country and beyond. 122. They should be matched up within a couple of degrees of average temperature across the tread. Your statement that the 3-link is what the metrics needed to level the playing field is the type of feedback that tech. 10. There's a happy medium between running just the right soft right rear and going too soft. Play the all new "DANNY SIMKINS - 11 STRAIGHT - trivia game." The cars with the stock metric 4 link all seem to go into a four wheel drift and are always loose on exit. Sometimes the handling of the car might not be to your liking. You must try to determine if your setup is balanced and then if not, make the necessary changes to bring it into a balanced state. Would it be too much of an advantage to let these guys run a 3-link rear with solid links and panhard bar? Over the years I have had lots of feedback that most . The sportsman car i had at SAS was always a fast car and it was coil spring 4 link no panhard bar and no weight jacks. . I guess the leaf cars could be allowed adjustable shackles in the rear to even that one out, sort-of. 1980 Camaro bomber class street stock crate motor ford 9inch.