Through trial and error, I spent a lot of time, money and energy learning how to get a race car to go around the corner and end up in victory lane. If you can use bucket and run a taller sprign thats a good way to go. Adding neoprene bushings to all of the connection points will unnecessarily restrict movement and cause the chassis to be stiff in roll. In 2005 Victory Circle entered the world of dirt racing. Here are what we consider to be the 10 most important areas of chassis setup with No. As the front brakes are applied, the caliper grabs the rotor and the motion of the wheel/rotor tries to rotate the spindle. Both of these ICs act like hard points of resistance to lateral movement of the chassis. These cars were meant to ride down the road nice not be fast on dirt, so you have to redo all of the mounts, change the length of the trailing arms, use hiems and/or rubber bushings or even spring loaded trailing arms to build traction. would be able to run on asphalt with the leaf spring cars. Stock cars using the metric-style four-link rear suspension usually need to do this just to achieve a balanced setup with the high rear moment centers in those cars. So, in most cases, we need to run a softer spring in the right rear. You need to keep the ride heights as close as possible to where they were before you started. Get any of Steve Smiths street stock books for general knowledge in the essentials of cam/cas, toe out , roll center etc. In the last article, I talked about the uses of toe and how it affects both drivability and front-end dynamics. 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. Sep 1, 2009. Motorcycle. There are some different lower a-arms and front suspension things to make them even better. Hey I am looking for some guidance setting up my 4 link GM metric rear end. Divide that in half for the center of the wheel. Cvracer5. Why Lower The Rear RC? In order to perform the set up routine the car needs to be completely ready to race. The car will turn better and we will have more bite off the corners. Required fields are marked *. We make it with either steel panels, or aluminium panels. It would be nice if we could change the rear suspension, I have done a lot of research on it and have found some info, there is just not a lot legally that can be done with it. Yes, I get inquiries about how to apply the BBSS setups to both of these types of cars. For me its very hard to be consistent and to adapt to the changing track states! The very first step in the process of preparing for the new season is to consider all performance-related items and how they worked last season. But the most useful rear steer will only occur on acceleration and not at mid-turn. Setup Balance Sometimes the handling of the car might not be to your liking. Conversely, if the car feels tight throughout the corner, raise both track bars. The settings, including the moment center location, really do dictate how all of the other parts and pieces of setup will work. Wonder how fast it would be if I changed the locations. I'm thinking that a panhard bar would eliminate side to side motion but little else. Its not necessary unless your own a road course. The message I get from those who have worked this trend for a sufficient number of years is one of the following two types: 1) a continuing and constant search for balance in the car and a loss of success on the track, or 2) a returning to the more conventional setups because they have experienced number 1 above. set the tone for how the parts and setup will work. Make small adjustments, about one half of one percent. The MC should always be somewhere close to the centerline (i.e., midway between the tire contact patches). Before you start your season, you need to create your It might help to leave it unattached on ovals. Lift earlier, and/or drag the brake just a little bit on entry. Understanding the relationship between the rear roll center on these cars and the setup will help us find a more balanced setup. by rick7343 Fri May 01, 2015 5:14 pm, Post It's the average height of the instant centers that determine the roll center height. A level panhard bar ( same mounting height on both sides) means force is vectored laterally to the tires. by RonL Fri Jan 02, 2015 12:36 am, Post Jul 25, 2011. The images used are taken from the iRacing Super Late Model setup screen. Your email address will not be published. However, they should be required to run he two stock lower rear trailing arms in their stock locations. I once drove a metric on both dirt and asphalt. Afco Racing Products. Excessive front toe in will make a car turn into a corner quicker, & may create a loose condition. There are two main ways to tighten or loosen the car. 321. Even when clear rules exist, the track officials are often reluctant to enforce them. This is our 1988 Monte Carlo Stock Appearing Body. Car went anywhere he wanted and was quick time, won the trophy dash, heat race and main. 6. Pavement Modifieds. It locates the rearend fore and aft, it reduces rear steer when the chassis rolls, it prevents axle wrap-up when braking or accelerating, and it provides a relatively stable roll center location. Billy Becka's 29 car, as he mentioned, was fast at SAS, but THR and SAS are very different beasts. 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. Circle Track Wheels. SR10 Dirt Oval RTR. 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. I'm curious what everyone's thoughts are on what it would take to allow the metric cars to be competitive without giving them too much. Filter by. 2. 507-386-3930. This 7 shock kit includes shocks for every track condition with tips to help fine tune your racecar. It is a low acid tomato with a unique flavor that has been described as sweet, yet slightly tangy. Thanks g dirt i will try that.im not totaly done with car yet just try to get ideas thanks, you are real close to what guys are running, but g is right, scale the car, i run leaf springs or i would tell you what i was running. 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. Over the years I have had lots of feedback that most . The idea is to steer the car using different height holes for the rear control arm mounts. I drive both a metric (my truck) and a leaf spring car (ss). Often overlooked in the mainstream, dirt track racing is one of the most exciting forms of tire-scorching car racing action. 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. Just giving the car more rear traction, period, does not help us if the car becomes too tight in the middle of the turns and we could end up with the reverse of what we need. Always try to start with the track bars first. 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. 2.Now set toe out. So, we must make due and set up these cars the best we can. I'm thinking about building a B Body for dirt track racing. 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. Manyof the ideas fit into the gray areas and some of them are outright cheating. Yea how many years ago a1? 8. It was either cheat or park it until the rules change. For the Big Bar, Soft Spring setups, teams often introduce Pro-dive into the left front suspension to encourage rapid dive on entry to get the left front down quickly. It is not advantageous to have the rearend steer to the right at any time on asphalt. IMHO they should be able to remove the two upper rear control arms and replace them with a single, fabricated, adjustable upper control arm (top link). I got a 1000 on ebay 150897831883 at like $5.00 I would do 1100 RF, 1000 LF, 225 LR and, 175 RR but that was on big chevelle or impala chassis. So don't try it. Since the spring promotes rebound and resists compression as inherent properties, then the shock rate of compression control must be less than the rate of rebound control. I dont really recommend it. I think I'll make a proposal along these lines. A high rear roll center causes a short moment arm in the rear suspension and will stiffen the rear suspension similar to installing very stiff springs. Ok im building a new circle track car useing a 1981 Camaro. Last couple of years I ran the car we just used tubular ones with rod ends because it was legal and easier. . RAceman. Aug 24th 2005. I ran a street stock/sportsman from 1995 to 2000 with a metric frame. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Your email address will not be published. Posted October 3, 2005. Includes: Performance handling basics, chassis & roll cage fabrication, front suspension alignment, changing the roll center and camber curve, rear suspensions, springs and shocks, tires (bias and radial), stagger, gearing, basic chassis set-up for asphalt and dirt tracks, weight adjustments, tuning the car to . We showed you the 3-link rear end last week. Hardcore Package - $5,700 (2023 Pricing) *Some components included in the package are not shown in picture below*. These desires are directly influenced by the spring stiffness, location, and spring split, the sprung weight the system has to support, along with the moment center locations and other settings. Try to at least get to 53% front and 53% left weight with out adding ballast behind the rear wheels. ANYBODY KNOW OF ANY STREET STOCK RACING CHEATS/TIPS. X-Y-G METRIC STREET STOCK / SPORTSMAN HEADQUARTERs 704-784-5353. Bilstein Stock Car Shock Package Fits the popular metric chassis (4) Front shocks (3) Rear Shocks Stock Mount front and rear Additional Features Nitrogen Gas . SUCH AS SPRINGS, SHOCKS, SWAYBARS ETC. 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. Free . If the car feels tight on corner entry, raise the left track bar. View Profile View Forum Posts Private Message Visit Homepage 02-25-2021, 09:09 AM. I don't really encourage that method. 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. On the a street stock what size spring would be better to run on the rear. My name is Rodney Arndt, I have an associates degree in automotive technology. Alignment issues are defined as: A. rearend alignment, B. contact patch alignment, C. driveshaft to pinion/transmission alignment, and D. engine alignment. We are at a crossroads at this point in time with setup technology in asphalt racing. How do I tighten or loosen the car on exit? How about just adding a panhard bar to the stock four-link setup? "ULTIMATE" Racing Car Chassis Setup Guide and Tutorial. Tire Tools. Brian Wise. I would get the metric arms from Speedway P-N 910-31134-RH (LH) they are 8.0 and 8.5 long. Thank you for pointing out the obvious to me . They should also be able to run any panhard bar. This guide is very similar to the NASCAR Racing setup guide. The driveshaft doesn't know which view these angles are resulting from, just that they are equal and opposite. 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. Just about all the available setup options that you can adjust on a real WC car can be adjusted in the sim. Try to understand how aero downforce is created and then configure your car so that you take advantage of every area where you could produce more downforce. The less angle the better. How do I adjust the cross weight in an iRacing setup? Not sure how much traffic this post will get here. 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 . Im lifting early and using zero brake. 70030. Cars that don't turn well are very likely to have poor MC designs. Download the Jet Mod Scale & Setup Sheet Here! As you will gather from this book, setting up your car right and properly maintaining it is a lot of work. Good luck. I also was involved with beta testing for NASCAR Racing Simulation Games. If you need to know the height of your Metric four-link rear roll center, then send an email and I will send you a free calculator to use. Nick and I agree on something! Because these cars are being used in great numbers in the Stock classes of racing here in the U.S., we need to have a better understanding of the design and how it relates to the setups. Plan to win in a repeatable fashion. 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. Thank You, DreamRacing.com offers a chance to go racing The right-side tire contact patches will also need to be inline with the right front tire pointed straight ahead. And, of course, Terry chose to park it. It costs just as much money, if not more, to run poorly, so you might as well learn to run well. To add weight to a given corner, raise the ride height at that corner or lower the ride height at an adjacent corner. These are the general rules unless you are trying to "tie down" a corner. Be careful not to overdue that. After payment you will be directed to a download page. 1 Min Read. With several wins and a championship under our belt after the first year . 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. lol Stocks are turning the same times as emods at most tracks these days, maybe not the top 3 emods, but pretty much the same wich is crazy. SmartPad BP-30 is a race only pad for heavy braking on dirt, and intermediate needs on asphalt. I was also wondering, are there any tricks you have to make your tires wear slower without damaging speed. Copper has been known to kill tomato plants if placed directly into the stem or base, but placing copper wire around the wound may not have the same effect. Create New Wish List . The left side suspension usually is designed with about half the angle of the right side in a conventional design. On the metric chassis the roll centers, from what I understand are mainly influenced by ride height, because we can't change control arms ect. I had a very experienced racer come out and help us one time and he said the problem he saw with the car is the rear end looked as if it was shifting to the left by a couple inches. CRA street stock. Thats with a 305 a ton less HP. I see the times at CCMS are identical, THR the truck .5 sec quicker. LOL. When the LF is too cold, the RR spring is too soft. I better get the torch and welder dusted off! Wheels. Bilstein has put together the ultimate Street Stock / Factory Stock Shock Package. A trend must prove itself in order to stand the test of time. Current Stock: Quantity: Decrease Quantity: Increase Quantity: Save to Wishlist. 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. 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. Johnny likes a softer feeling car, front and back. Aero Package Too low a ride height could cause the car to bottom out. Vintage/Classic/Historical Engine Tech, 3V Performance Engine & Valve train Development, Race Cars & Parts - For Sale or Wanted, Asphalt circle track metric GM 4-link questions, Re: Asphalt circle track metric GM 4-link questions, https://www.physicsforums.com/threads/r ss.326355/. A three link with panhard bar using the stock lower mounts works fine. Competitions are held on oval tracks . ; C1 - Designed for medium to low brake temperatures and provides good cold bite while being rotor friendly. This guide was awesome! Always try to start with the track bars first. did desi arnaz jr have a stroke; moose tracks vs cow tracks ice cream Check with the rules to see if it's even mentioned. Coreless Stretch Film; Pre-Stretch Film; Hand Roll; Machine Roll; Jumbo Roll; Industrial Plastic Division. Send your request to bob.bolles@sorc.com. Conversely, if the car feels tight throughout the corner, raise both track bars. And your choice of aluminum or steel fenders doors and quarters. Next is engine set back if allowed. 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. The bottom line is that at mid-turn, each end will want to roll to its own degree of angle. Setup Changes For The Metric four-link Even if we can lower the rear RC to around 13 inches, that's still a high rear RC. Officials are trained to find sneaky parts. In Stock. Is this why Im wearing out the right front? I would trail brake or lift earlier. 10702FMC FRAME & CAGE - FAB CHEVELLE MOD. Now you have to compensate with spring change. Once you have evaluated all of the above and feel fairly confident that the car is set up correctly, you should then work to tune the transitions into and off of the corners with the shocks. Conclusion The Metric four-link rear suspension is here to stay for a while. Over the years I have had lots of feedback that most these concepts and ideas work great on dirt, on front wheel drive mini stocks, on almost any street stock, production typerace car. The overall work that a shock does is to resist the rebounding of the springs and control the speed of compression. Do not seek aero downforce at the expense of aero drag increase. Its important to make even adjustments, meaning you should make the same number of clicks on each spring perch. Check your PM's. Smaller gains can come later on after the more important aspects of setup are resolved. If the car feels loose on corner entry, lower the left track bar. Christjohn likes to get to the track early and get his car set up so he can watch the races. But if you cant 11 inchers is all you can go. A spring split of 250-lb/in spring in the left rear and 200-lb/in spring in the right rear is common. 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. Once you've made the entry to the corner balanced, check to see if the adjuster is centered. Setup Tools. Go here but read before you post..lol. There is no one big trick to make your care handle better, rather its all the little things done right that will make you consistently fast.

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