JEFFREYS Fabrication is coming soon!!! Hey I am looking for some guidance setting up my 4 link GM metric rear end. Quote. Smaller gains can come later on after the more important aspects of setup are resolved. 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. Required fields are marked *. 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. If all of these issues are evaluated and corrected, then you can move on. The front moment center (MC) location plays a huge role in how the front end wants to work. Competitions are held on oval tracks . Roughly 8-10 degrees of third link angle is sufficient to promote antisquat and not hurt your corner entry. Both of these are necessary components that will be needed to win championships. The dynamics of the moment center and the effects of camber change have been explained before. Wonder how fast it would be if I changed the locations. So, in most cases, we need to run a softer spring in the right rear. LIT-721 80293NDP 2009-2015 Cadillac CTS-V HE. The control arm angles affect the rear steer and the third-link angle can redistribute load upon acceleration. ; C1 - Designed for medium to low brake temperatures and provides good cold bite while being rotor friendly. I'm not saying this is not important to some degree, but on short tracks I would stress that aero downforce is over-rated in most cases. Nick might be a better theory guy but I don't think that just adding a panhard bar will get you there. That's just a thought, i don't know that for sure. In situations where the exit portion of the track provides less traction and/or the corner is more flat, we might need to develop more rear traction upon acceleration. Remember that drag is an important aspect of aero design. How do I tighten or loosen the car on entry? SmartPad BP-30 is a race only pad for heavy braking on dirt, and intermediate needs on asphalt. If the car feels loose throughout the corner, lower both track bars evenly. After you get the cross weight where you want it, adjust the ride heights. This force is resisted by the ball joints and control amrs. On the a street stock what size spring would be better to run on the rear. 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. Remember, we're still using stock components, we're just making small relocations of those points. Adjust the cross weight for more extreme conditions or different circumstances. In short, you'll get more rear grip by lowering the rear RC. You can try bigger adjustments if you cant tell much difference in the handling after you make smaller adjustments. Other competitors will offer you tips, but what works on their car may not work on yours and often they cant explain why something works for them, it just does. jp. 10702FMI FRAME & CAGE - FAB IMPALA MOD. Brian Wise. Any angle up hill to the right rear will cause upward force on both tires and unload both tires. 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 . If you want to know how to adjust iRacing Sprint Car cross weight, go here. Samuel232. But just wondering what the heck guys are doing to these metric street stocks to make em so fast. . 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. Basically - after you finish the set up routine, the car goes in the hauler. How to Lower the Cross Weight in an iRacing Setup. The images used are taken from the iRacing Super Late Model setup screen. would be able to run on asphalt with the leaf spring cars. 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. This chassis utilizes our very popular double slotted strut style front clip. Heres a helpful image. jp. 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/. If it is too far to one side, then changes to the brake master cylinder sizes and/or the pad compounds might need to be made in order to maintain a centered-bias adjuster. Heck, if you are paying 20 bucks to get into the pits you might . Sometimes the handling of the car might not be to your liking. Has boxed lowers, adjustable uppers , stock springs and shock. The more third link angle you have, the more antisquat there is. For many gardeners, it starts with tomatoes. var email = "RacelineCentral"
The last time I drove that car I put a short third link (11 inches long) and a long panhard bar after that any adjustment I did to the car it did what it was supposed to do. $1,700. Russet mites are a type of pest that can cause damage to leaves, stems, and petioles. You must log in or register to reply here. AFCO C1 METRIC PADS. Most of the ideas in this book are perfectly legal for any rule book. 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. Setup Balance Street Stock Tech. Street Stock; Other; Best Selling. The engine should always be aligned perpendicular to the rearend and/or parallel to the centerline of the car. Ive raise the center section of the chassis where the the upper mounts attach by 3". Christjohn has been racing street stocks for 13 years and has amassed 74 feature wins and 4 track championships. 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. Street Stocks Dur-A-Flex Racing. That extra effort is what separates the front runners from the rest of the field. Street Stock. taipei city stock pictures, royalty-free photos & images The cross weight adjustments should work on all dirt cars except the Sprint Cars. Jul 25, 2011. Plan to win in a repeatable fashion. With allot of experimenting I found a way to really get the car to hook up. by RonL Fri Jan 02, 2015 12:36 am, Post If the car feels loose on corner entry, lower the left track bar. Special Discount Cost- $24.95 !To download a copy of the E-book, simplyclick on the link below. Motorcycle. I ran a street stock/sportsman from 1995 to 2000 with a metric frame. I noticed the camaros can arch or de arch springs. The artistry comes in when you actually do it. RAceman. Rear Geometry Swap Option: Medieval will build the chassis using one of our sandblasted frames. We must develop ways to create more rear traction on acceleration only. 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. 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. Port City Racecars Road Race Chassis is a purpose-built racing machine. If you have any problem with the download, just email me, and I will email or Facebook you your file. 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. And, it must be economically applied. Your email address will not be published. Shown above is a gaming expo fair in Europe that held a contest for the best gamer team in a newly released 1st shooter game
So, we must make due and set up these cars the best we can. Divide that in half for the center of the wheel. Home. Welcome, Guest. Contact Us. Even when clear rules exist, the track officials are often reluctant to enforce them. Setup Tools. How to Open the Setups. When thisbook was originally published in 2001 it was specifically for GM Metricchassis (78 or newer Malibu, Monte Carlo, Regal and Cutlass cars) racing on asphalt. But there is still some changes to be made from track to track. It must show a consistent gain in performance and a logical ideology to the bulk of race teams. Setup Tips for Metric on asphalt racecheep. Every year, Jack asks drivers for input regarding rules changes for the following year. It is not advantageous to have the rearend steer to the right at any time on asphalt. Not sure how much traffic this post will get here. Also the rear springs on that car Dave 24, are either Landrum 200-175 or Afco 194-166can't remember, Only if you are racing anywhere except Bonneville.lol Chad. From NE Ohio to North Central Mississippi, everyone has their own ideas and preferences for what they will plant this year. You are using an out of date browser. The car is loose mid to exit with not foward drive. 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?" Some people add preload to the sway bar to make cross weight adjustments. 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. Once you've made the entry to the corner balanced, check to see if the adjuster is centered. The only component were worried about is
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. A three link with panhard bar using the stock lower mounts works fine. Location:Austin, Tx. The setup we choose needs to be arranged so that the dynamics are balanced between the front and the rear suspensions. Then should I use brakes more? The rear won't desire much roll and there will be excess load transfer to the outer wheel and tire. 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. Just about all the available setup options that you can adjust on a real WC car can be adjusted in the sim. 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. Would it be too much of an advantage to let these guys run a 3-link rear with solid links and panhard bar? So, we either lower the rear RC or soften the springs, especially the right rear spring, or preferably do both. The cars with the stock metric 4 link all seem to go into a four wheel drift and are always loose on exit. The preferred way to adjust the cross weight is by moving weight around. A three link with panhard bar using the stock lower mounts works fine. by doing this and the use of lowering blocks the rear roll center can be changed, I know it's not a quick adjustment but it is an adjustment the the metric car in the stock. A good handling car can make gobs of horsepower and hook it up. I think with the panard bar and 3rd link the metric cars. 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. I was wondering if anyone out there had any experience circle track racing a mopar unibody. With several wins and a championship under our belt after the first year . In Stock. These cars just take a little longer to get them set-up compared to the camaros, but there are alot more adjustment points to help you get and stay fast. . 6 pt roll cage setup for easy in and out street use. The driveshaft doesn't know which view these angles are resulting from, just that they are equal and opposite. As a general rule, most asphalt stock cars run around 3.5 to 4.0 front roll center height, although many run lower roll centers than they would like simply because the stock location is very low . The car madracing 19 has for sale has all of these things done to it. Too low a ride height could cause the car to bottom out. ford 9' rear end w/disc brakes, stocks, springs, gauges just add motor and transmission and go racing. Most Metric cars I've evaluated have rear RC's up around 14.5 inches off the ground. As for stock arms they worked just fine ,and didn't cost anything. Conversely, if the car feels tight throughout the corner, raise both track bars. To add weight to a given corner, raise the ride height at that corner or lower the ride height at an adjacent corner. That's why I asked about weight jacks in the original post. A Setup To-Do List to Get You Started . I never felt good about cheating but when everyone does you need an even playing field. Drag the brake lightly as you enter the corner. 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. Get the best deals on Asphalt Oval Racing Parts when you shop the largest online selection at eBay.com. 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. I would run either the pure stock or street stock class. The proper steps to do this are outlined below. Everything you need to know to build, set-up and race a Street Stock competitively. The CCMS rules allow 3rd link and panhard bar. For the novice sim racer, all these setup options can seem overwhelming & confusing without the knowledge of what all these adjustments are or do.By understanding the basics of what each component is & how it directly effects the car, you'll quickly discover what direction you should head when trying to adjust for that looseness exiting the corner under acceleration. THAT ARE CHEAP AND APPEAR STOCK. About Us. This will loosen the car, and that's undesirable, especially on dirt. We have continually pressed these issues because of the extreme importance they have. Looking forward to the tips for Dirt Oval racing! If the car feels tight on corner entry, raise the left track bar. Save these setup files to C:\Documents\iRacing\setups\dirtstreetstock\. Play the all new "DANNY SIMKINS - 11 STRAIGHT - trivia game." Over the years I have had lots of feedback that most . I also was involved with beta testing for NASCAR Racing Simulation Games. So don't try it. We run on a semi flat 1/2 mile asphalt track. 70030. I appreciate the lead. 5. 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 . I'd think that without them you'd at the very least need to allow some sort of spring adjuster. The influence of the location of the front MC can be compared to a sliding scale. Steering Geometry However, they should be required to run he two stock lower rear trailing arms in their stock locations. Posted October 3, 2005. Reply #9 - 05/01/09 at 8:00pm. So, it might be the best for asphalt racing to run as low as possible or as much as the rules allow to create a lower center of gravity. This setup guide also has new information based on the changes that go along with the new version of the sim. If the car is tight under throttle, or driving off the left rear, invert the spring perch offset adjustment procedure above. We have been softening those setups over the years, but never intended to go to coil bind or bump rubbers. Both of these ICs act like hard points of resistance to lateral movement of the chassis. Moderators:FeliciaMC88, UFo Race Championship. I have always believed in priorities because you can make gains faster when you solve the high priorities problems first. 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. Mod Four Tech. *-*. LIT-A950700006 80249N Ford F-150 LightningHarley HE. competition. Thanks a lot for making it. I was also wondering, are there any tricks you have to make your tires wear slower without damaging speed. Sort by. I know enough about suspension geometry and how to achieve it, but what i have been playing with now is CG and where it works best. Maybe if Billy would be more specific about how he made his stock setup work we could learn even more. Dirt Race Life is explaining how to draw out the front end on a race car and determine where the roll center is. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Your email address will not be published. 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. Pavement Modifieds. Conclusion Also pinion angle with stock bushings. 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 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. by rick7343 Fri May 01, 2015 5:14 pm, Post 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. This develops more crossweight as the car squats on acceleration. We ran the car with a lot softer set up than that. Contact Us. 507-386-3930. These are the general rules unless you are trying to "tie down" a corner. 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. 358091 FAB IMPALA, NO UPPER MOUNTS. 321. Got protested and is now in limbo! 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. You might try a little trail braking. 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. If you use no brakes you can wear the right front. lowers are stock location on frame. Thank you for pointing out the obvious to me . Good luck and keep the rubber side down!!! I can only speak for THR, but we are not allowed to use adjustable shackles, or I should say we are not allowed to have shackles of different lengths. I don't know much about spring adjusters hidden or otherwise but I'd say they could be made to work. This topic is now archived and is closed to further replies. 1980 Camaro bomber class street stock crate motor ford 9inch. In 2005 Victory Circle entered the world of dirt racing. Adjust drag link accordingly, *unless something is bent, spindles, drag link, idler arms, etc. 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. Car has stock location rear links and stock links , different bushings . We cover all forms of racing in the Midwest featuring racing news, results, photos & videos. 1. Its not necessary unless your own a road course. 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. Your close on the springs if the car is 3200. We always start with the front end geometry on any race car. 122. 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. Did not get DQ'd but after the race the promoter told him that too many other cars were complaining and he would not be able to run the car in that class. On a metric four-link car, the four control arms determine the rear moment center height too. 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. Bite Off The Corners These components include the radiator, oil/transmission coolers, & brakes. SAS I seem to remember being faster than the sportsmans. 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. First, we don't want to restrict the movement of the arms too much. One way is to have a rear spring split, where the right rear (RR) spring has less spring rate than the LR spring. Caster is best described as a vertical line that runs through the 2 pivot points in your car or trucks suspension. View all S3SS. I spoke with Dave24 after last weekend, he dropped the fronts down to 700 LF and 800 RF and got the cross down to 45.8%, pulled the bolt out and floated the RR spring. Caster. Ill start of saying i know how to mesure the roll center but im not sure where im trying to go or how to exactly. I talk to lots of racers representing every form of circle track racing in every region of the country and beyond. Dial In Your Metric. . I'm a former NASCAR short track driver and league administrator for SASCAR. JP is that the car you wadded up and broke your leg? 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. Add to . I ran a street stock/sportsman from 1995 to 2000 with a metric frame. Dec 24, 2005 at 5:33am. Grill tape is nothing more than duct tape. pretty much none of that ++*% matters at stateline, it is mostly driver and survival is the name of the game, get all your angles and roll centers figured out and you will be faster when you make it to the front i have seen dozens of cars that dominate in the stock class at stateline but get squashed at eriez and rw7 however once you get a car fast at either of those tracks then you will be fast everywhere you go. Camber was -2 deg on RH and +2 deg on LH at ride height. Lee Christjohn of Antigo, WI knows what it takes to win street stock races. Another gardener is pla, Get Free Seeds & Taste the Delicious Flavor of Estler's Mortgage Lifter with Edweather's Generous Offer, Estler's Mortgage Lifter is an heirloom tomato variety developed by William Estler in the mid-1920s. We had no idea how popular and successful this line of chassis would be. However, that is only one of the three basic geometric ways to move a tire on a race vehicle. This variety grows best when grown alone and can reach up to 12 feet tall. Posted 5 weeks ago. Click. We showed you the 3-link rear end last week. The Antis If we arrange our control arm angles, from a side view, for antidive, then as the car dives the upper BJ would move to the rear and the bottom BJ would move to the front. LOL. Get any of Steve Smiths street stock books for general knowledge in the essentials of cam/cas, toe out , roll center etc. Street Stock Dirt Oval Racing - All the dirt, clay and pavement-racing excitement in a 1:10 scale RTR. Maybe not on little tires either. For me its very hard to be consistent and to adapt to the changing track states! That troubles me. First of all, the design is intended to solve several problems. Refer to the images below. 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. I remember qualifying times in the 19.6 to 19.7 range. Most good cars are built on wheel scales. A complete body comes with the fiberglass hood and roof, plastic MD3 nose and tail, a set of skirts, trunk, a box of rivets. Most often, these pivot points are the upper and lower ball joints in your double A-arm style suspension system. Join OSR Voice/Text Chat. I thought these were street STOCKS? Customer is to bring a clean non-sandblasted frame when picking up the chassis. 5. Posted August 22, 2005. Strictly asphalt street stocks and parts. I would get the metric arms from Speedway P-N 910-31134-RH (LH) they are 8.0 and 8.5 long. At some point, we take in enough information to allow us to avoid the mistakes of the past and get ahead of the curve in setting up our asphalt cars. Over the years, most of the things that I have learned about racing, I've learned the hard way. CRA street stock. 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. I used 13" springs with buckets welded in the frame on the rear.Car will be to high without buckets trying to use 13" springs.We used straight 6 valve shocks on the front and straight 5 valve shocks on the rear.Don't mess with split valve shocks if you are a beginner.this spring setup . Send your request to bob.bolles@sorc.com. Our second design in our dirt chassis line this IMCA legal metric clip car designed in 2006 was already proving itself to be a successful chassis. Thats with a 305 a ton less HP. 2,224. 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. Loss of efficiency can rob power from the drivetrain due to the generation of vibrations and harmonics that are also damaging to the bearings. We had LF 1000, RF1300. Yeah! 10702FMC FRAME & CAGE - FAB CHEVELLE MOD. Adjust all four spring perch offsets to change the cross weight. Eliminate most of your bumpsteer and Ackermann and install the correct steering ratio for your track that would suite the driver. Adding neoprene bushings to all of the connection points will unnecessarily restrict movement and cause the chassis to be stiff in roll. If you find that the left rear is the coolest tire on the car, then you have a setup balance problem where the rear is too stiff. 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. My name is Rodney Arndt, I have an associates degree in automotive technology. 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. Wheels. 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. Nick and I agree on something! With so many different combinations of possibilities it leaves us with literally thousands of possible chassis combinations to choose from. The track was a 5/8 mile asphalt and was extremely fast. 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.
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