The proper steps to do this are outlined below. In order to perform the set up routine the car needs to be completely ready to race. If you want to know how to adjust iRacing Sprint Car cross weight, go here. Competitions are held on oval tracks . Contact Us. Yes, I get inquiries about how to apply the BBSS setups to both of these types of cars. 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. We took all the cross out like Lee and trailed the RR and did not use much stagger. The moment center must be located correctly for your type of racing and the cambers must be set, again toward your setup style and track conditions. Here is an explanation of balance related to the dynamics of the race car. Hobby Stock - (USRA/IMCA TYPE) Street Stock - (WISSOTA TYPE) Stock Car - (USRA/IMCA TYPE) If you can use bucket and run a taller sprign thats a good way to go. LOL. Try to at least get to 53% front and 53% left weight with out adding ballast behind the rear wheels. Most guys that are fast there are fast everywhere. If your vehicle of choice utilizes a McPherson strut style front suspension, then your 2 pivot points would be . Posts: 72. When the track is cooler, you may want to loosen the car some. There is one IC for the upper links and one for the lower links. Jul 25, 2011. I never got to the experimenting stage on asphalt. 10702FMC FRAME & CAGE - FAB CHEVELLE MOD. Also has a anti roll bar added to it. Antisquat results from the third link trying to straighten out, or become more horizontal as the car accelerates and the rear end desires to rotate. X-Y-G METRIC STREET STOCK / SPORTSMAN HEADQUARTERs 704-784-5353. We have done a lot with the front roll center and cant wait to see how it does, after that, i found some legal stuff for the rear that we will try. There are two main ways to tighten or loosen the car. Most of the time when some ask the question they are at that point and just don't know it. Dirt Modified IMCA, Local Tracks. Then should I use brakes more? Modified Chassis - Howe Racing Enterprises, Inc The components that locate the rear end must be evaluated and set correctly. We had LF 1000, RF1300. Sometimes the handling of the car might not be to your liking. 266. I thought these were street STOCKS? Add Comment. We ran the car with a lot softer set up than that. Billy Becka's 29 car, as he mentioned, was fast at SAS, but THR and SAS are very different beasts. Sliding the MC left and to the inside of the turn makes the suspension softer. Asphalt Street Stocks & Parts Only - Facebook It is not advantageous to have the rearend steer to the right at any time on asphalt. $137.99. This 7 shock kit includes shocks for every track condition with tips to help fine tune your racecar. 3. I see the times at CCMS are identical, THR the truck .5 sec quicker. We cover all forms of racing in the Midwest featuring racing news, results, photos & videos. $1,700. The Metric four-link suspension design is a bit different than most other rear suspensions. Thanks a lot for making it. Posted August 22, 2005. Long exposure, Nikon D810. If the car's center of gravity was say 16.5 inches (around average for an asphalt car that has been lowered), there would only be a 2-inch moment arm to try to roll the car. Compare that to an asphalt Late Model car with a rear Panhard or J-bar and a 10-inch rear RC height and a 15.5 inch CG height. Reply #9 - 05/01/09 at 8:00pm. LIT-719 80292 C7 Corvette Radiator. Moderators:FeliciaMC88, UFo Race Championship. Over the years I have had lots of feedback that most . We can add the stiffer bushings to most of the points, but leave several, one at the top and one at the bottom, as a rubber bushing to absorb the torque created in roll. It might help to leave it unattached on ovals. With allot of experimenting I found a way to really get the car to hook up. With several wins and a championship under our belt after the first year . A 1/2 inch height change from level can make significant handling changes. SR10 Dirt Oval RTR. SmartPad BP-30 is a race only pad for heavy braking on dirt, and intermediate needs on asphalt. 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. Moving the pull-bar or just the third link to the left increases the loading on the LR tire during acceleration. The less angle the better. Take a look at a metric street stock rear suspension video. 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. Conclusion The Metric four-link rear suspension is here to stay for a while. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Your email address will not be published. Welcome to STLRacing.com, home of St. Louis Motor Racing News. Try one or two click on each spring perch shown above to raise the cross weight. Last couple of years I ran the car we just used tubular ones with rod ends because it was legal and easier. This guide was awesome! So don't try it. I dont really recommend it. Street Stocks Dur-A-Flex Racing. Estler's Mortgage Lifter is ideal for growing in northern climates due to its ability to withstand cooler temperatures better than other varieties. As each season comes along, our knowledge of what we need and desire grows. Each suspension system desires to do its own thing when lateral forces are introduced from the car going through the turns. Adjustment Guide - Medieval Chassis. Heres a helpful image. Most often, these pivot points are the upper and lower ball joints in your double A-arm style suspension system. Symptoms include bronzing on stems and petioles, curling and drying up of leave, This website uses cookies for functionality, analytics and advertising purposes as described in our. This will loosen the car, and that's undesirable, especially on dirt. 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. I'll start out with what seems like the obvious to me - the rear suspension. The steering system in your car must be evaluated and any negative characteristics must be eliminated. Would it be too much of an advantage to let these guys run a 3-link rear with solid links and panhard bar? That was it. Racing Aspirations refers to this point as the roll center (RC), but it can also referred to as the moment center. I built Couchenours 99 car . Taipei City Stock Photos, Pictures & Royalty-Free Images - iStock It also seems hard to argue that the stock 4-link/metric cars have a hard time being competive in our SS/Sportsman classes where a stock suspension is mandated. This is our 1988 Monte Carlo Stock Appearing Body. RacelineCentral is not responsible for the accuracy of this document, If you are an owner, sponsor, or mentioned here, Please feel free to contact us below for updating. Order Wilwood part number 150-9442K. Thank you for pointing out the obvious to me . ; C1 - Designed for medium to low brake temperatures and provides good cold bite while being rotor friendly. Roll Center(movement center) circle track 1981 Camaro help This topic is now archived and is closed to further replies. .220 to .235 would be fine without a quickner. I ran a street stock/sportsman from 1995 to 2000 with a metric frame. Send your request to bob.bolles@sorc.com. 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. Since mustangs have a similar rear suspension would these same mods work? SR32 - Developed for the right fronts of dirt cars where low grip is needed to help build bias in the front brake system and help the car turn better when you have to use 4 wheel brakes. More has to be done to help the rear roll to match the front. Add to Cart. the metric cars at THR are at a big disadvantage in terms of track width, ride height, and rear suspension but if they were to be able to use a third link and panhard bar they can be very competitive even without weight jacks. Antisquat is detrimental to corner entry. You need to locate the moment correctly, and the cambers . Has gone 1.29 60 ft on spray, has 28 10.5 et street tires on it also. You can use your stock metric pitman arm and . What do you mean by spring loaded trailing arm, i've always had that idea, but not sure if its something thats available or something i would have to fab up. The front end takes time and effort to get the bump steer and caster gain within a tolerable amount, you have to move the upper and lower control arm mounts, cut the left side lower control arm, use special length ball joints, etc, etc. in Exotic Race Cars on a Real RaceTrack, Copyright 2000-2023 Conversely, if the car feels tight throughout the corner, raise both track bars. Ill provide a couple of tips that will help you get your car tighter or looser, whichever you need. Might go25- 50 pds more on each side and the left side should be more than the right side. 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 think I'll make a proposal along these lines. The car may or may not be neutral in handling, but the handling will not be consistent. The engine should always be aligned perpendicular to the rearend and/or parallel to the centerline of the car. You might try a little trail braking. These cars drive off the left rear more to keep them from being to loose, that is why you are starting to see the LF coming off the racetrack, it takes proper weight placement, rear bushing selection, spring choice, and ride heights to make it have a lot of traction but not be a three wheel out of control mess. Street Stock Setups. Shocks Online: $349.99. As the front brakes are applied, the caliper grabs the rotor and the motion of the wheel/rotor tries to rotate the spindle. Antidive and antisquat are mechanical influences that can help our transitional phases of entry and exit. March 27, 2015. Excessive front toe in will make a car turn into a corner quicker, & may create a loose condition. I would get the metric arms from Speedway P-N 910-31134-RH (LH) they are 8.0 and 8.5 long. These components include the radiator, oil/transmission coolers, & brakes. Then all you have to do is maintain that balance throughout the season and that means resisting making changes that take you outside that envelope. Grill tape is nothing more than duct tape. What do you think Nick? The car will turn better and we will have more bite off the corners. So, again this year as in past years, we will present what is admittedly the formula for success related more for the conventional and what we call soft conventional setups mainly because these are the ones that produce more consistency and do win races. The bottom line is that at mid-turn, each end will want to roll to its own degree of angle. Heck, if you are paying 20 bucks to get into the pits you might . Hey I am looking for some guidance setting up my 4 link GM metric rear end. Cra bomber, turbo ,etc. Yea how many years ago a1? Some people add preload to the sway bar to make cross weight adjustments. AFCO C2 METRIC PADS $179.99. Current Stock: Quantity: Decrease Quantity: Increase Quantity: Save to Wishlist. 122. Go here but read before you post..lol. Chassis Setup Docs Hyper Racing. Adjust the cross weight for more extreme conditions or different circumstances. The amount of difference you need is directly influenced by the installed motion ratio of the spring and the spring rate. 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/. 9. 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. taipei city stock pictures, royalty-free photos & images var emailHost = "hotmail.com" You can then make fine adjustments with the sway bar preload if desired. METRIC CROW FOOT Other Items Online Auctions at EquipmentFacts.com. View Profile View Forum Posts Private Message Visit Homepage 02-25-2021, 09:09 AM. 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. Circle Track FAQs - QA1 What I hear I feel is representative, although those who dive head first into the BBSS mix not because of a perceived and measured expectation of success but because of the "see monkey, do monkey" attitude, will never share what they are doing. 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. Christjohn likes to get to the track early and get his car set up so he can watch the races. And your choice of aluminum or steel fenders doors and quarters. It's the average height of the instant centers that determine the roll center height. Prices listed are with a frame swap option. I appreciate the lead. 10. It costs just as much money, if not more, to run poorly, so you might as well learn to run well. Good luck. Wheels. 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. 1 Min Read. For the most accurate Setup and Tech Support, download our Scale & Setup Sheet, fill it out with as much information as you can and then fax it to us at 402-228-4796. . The car would have a complete roll cage with stock type suspension. It also doe, Fighting Fungal Diseases on Plants - Exploring the Use of Copper, Daconil & Copper Fungicides, The use of copper to fight plant diseases is an intriguing concept that has been around for some time. Wheels. I have had a lot of feedback from teams who did the same with the same results. Steering Geometry I drive both a metric (my truck) and a leaf spring car (ss). Polyethylene Film / PE Sheet I have always believed in priorities because you can make gains faster when you solve the high priorities problems first. View all S3SS. The dynamics of the moment center and the effects of camber change have been explained before. For the lower links, lowering the chassis mounts at the front of the link lowers the rear RC. Is this why Im wearing out the right front? ford 9' rear end w/disc brakes, stocks, springs, gauges just add motor and transmission and go racing. Of the other two, camber is well-recognized, but for all intents and purposes, the least-understood . After the race I had people come to our pit area and ask how did you get a metric car to lift the left front off the ground?" On a metric four-link car, the four control arms determine the rear moment center height too. Post by rick7343 Fri May 01, 2015 5:14 pm, Post 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. Pavement Late Models Stock Cars. You are using an out of date browser. Going way back I remember running a early 70's Nova in the street stock division at the old Nazareth 1/2 mile dirt track in the early 80's. Damn, they were some wild nights up there. We always start with the front end geometry on any race car. Each end has its own moment arm length and resistance to roll as well as other factors. The number one reason a car will be tight and not want to turn is because the front end is not designed properly. the radiator. That troubles me. Your close on the springs if the car is 3200. 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. Good luck and keep the rubber side down!!! Frost Racing - Setup Tips The Street Stock | Get Started Racing Setup Balance The lateral location of the third link can affect the distribution of load among the two rear tires that results from acceleration and antisquat. I would rather race 100% legal with a rule book that is written 100% clear and specific, that is enforced as it is written. How do I adjust the cross weight in an iRacing setup? 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). 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. You must log in or register to reply here. Street Stock Setup Manual 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. Contact Us. The overall work that a shock does is to resist the rebounding of the springs and control the speed of compression. We can lower the rear RC by making changes to the mounting points. Track Tools. S3 - Street Stock - USA $4.00; S3 - Street Stock - Lanier $4.00; S3 - Street Stock . 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. 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. Brake Bias Anything helps when u trying to figure out a starting point.thanks for the input i will try some of this and see how it works i have raced some before mostly mini stocks. Verndale, MN. . CRA street stock. Remember that drag is an important aspect of aero design. Street Stock Tech. This chassis utilizes our very popular double slotted strut style front clip. Hardcore Package - $5,700 (2023 Pricing) *Some components included in the package are not shown in picture below*. In short, you'll get more rear grip by lowering the rear RC. Car went anywhere he wanted and was quick time, won the trophy dash, heat . Im lifting early and using zero brake. Im using a 9" floater, locker, 60" w/centered pinion. 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. 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. Another way to gain bite that we have described in the past involves the use of a spring-loaded pull-bar that allows a certain amount of rear end rotation. If the car feels loose throughout the corner, lower both track bars evenly. PDF Asphalt Modified Setup Guide - Hldm4.lambdageneration.com If the same stiffly shocked corner is in rebound, less of the overall load will be retained by that corner, and its diagonal corner as well, during the rebound cycle only. Ive made the brackets on the rear housing (lowers) longer with trailing arm mounts that have 3 . 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. Saturday Night Racer - street stock set up - LATEMODELRACER.COM The "ULTIMATE" Racing Car Chassis Setup Guide and Tutorial 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. LIT-A950700006 80249N Ford F-150 LightningHarley HE. On the a street stock what size spring would be better to run on the rear. 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. Oversteer help - 1978-1988 General Motors A/G-Body Community If we can raise the upper front link mounts, we can lower the rear RC by lowering the upper IC. Your statement that the 3-link is what the metrics needed to level the playing field is the type of feedback that tech. I talk to lots of racers representing every form of circle track racing in every region of the country and beyond. The fruits of this plant are large and can weigh over one pound. (Uncheck the box beside Attach left side and use the arrows beside Left bar end clearance to zero the preload). Fox80. Remember, we're still using stock components, we're just making small relocations of those points. Street Stock. This will be a brief tutorial that should help iRacers adjust their setups to better suit their driving styles. Get it right or don't get it at all. 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. To sort of act as a pull bar? Loss of efficiency can rob power from the drivetrain due to the generation of vibrations and harmonics that are also damaging to the bearings. Aug 24th 2005. Understanding the relationship between the rear roll center on these cars and the setup will help us find a more balanced setup. 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. If the car is tight under throttle, or driving off the left rear, invert the spring perch offset adjustment procedure above. Smaller gains can come later on after the more important aspects of setup are resolved.