by RonL Fri Jan 02, 2015 12:36 am, Post Thats the theory and the science anyway. Fox80. A three link with panhard bar using the stock lower mounts works fine. This will be a brief tutorial that should help iRacers adjust their setups to better suit their driving styles. March 27, 2015. Its a whole lot more driver and a whole lot less setup on dirt. 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. 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. Metric Rearend Suspension Video from a Street Stock 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. Plan to win in a repeatable fashion. A set up plan will help you to build a race winning effort. Go here but read before you post..lol. I don't really encourage that method. Brake Pad Identification and Friction Surface Options Explained We can lower the rear RC by making changes to the mounting points. The left side suspension usually is designed with about half the angle of the right side in a conventional design. There are ways to do that without changing the handling at other points around the racetrack. document.write("" + contact + "" + "")
We had no idea how popular and successful this line of chassis would be. Setup & Tech Info - Jet Racing Inc Get any of Steve Smiths street stock books for general knowledge in the essentials of cam/cas, toe out , roll center etc. Adjust all four spring perch offsets to change the cross weight. Happy New Year. 1 being the most important. Some of the names, most notably in the asphalt Street Stock springs, are different, but the process is the same. 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. Its not necessary unless your own a road course. Roughly 8-10 degrees of third link angle is sufficient to promote antisquat and not hurt your corner entry. 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. Unfortunately, most rule books that I have dealt with are very vague. 30 day Money Back Guarantee!- If you don't learn something that helps you go faster, email me and I will refund 100% of your money backAfter payment you will be directed to a download page. 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. We even did pretty good with it in the THR LLM class back in `99. On a metric four-link car, the four control arms determine the rear moment center height too. I noticed the camaros can arch or de arch springs. In 2010 we made a good car better by a design change with the introduction of the Chevelle front clip. Drag the brake lightly as you enter the corner. If those desired angles are different, then we term the setup unbalanced. Before you start your season, you need to create your Ill also answer a couple of common questions: These changes are applicable to all asphalt oval cars. We were allowed weight jacks and after market uppers in front also. Stretch Film Division. The cars with the stock metric 4 link all seem to go into a four wheel drift and are always loose on exit. The pad is best used on IMCA style modifieds, the fronts of "Outlaw" style modifieds, drag racing . Roll Center or Moment Center. A very soft spring would need more compression rate and less rebound rate, whereas a stiff spring would need a lot of rebound rate and much less compression rate. 97 to 2004 set up sheet for stock metric lowers ride height lf 3 1 2 to 4 rf 4 1 2 lr 11 1 4 to 11 1 2 rr 11 1 2 4 link amp 3 link lf 1100 rf 1000 these spring rates are a good starting point some tracks call for a little less and some for a more don t listen to your buddies on spring rates because different, the 4 5 / 20 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. $1,700. I have had a lot of feedback from teams who did the same with the same results. We must develop ways to create more rear traction on acceleration only. 5. If the LR tire is too cool, then the RR spring is too stiff. 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. The rear roll center is certainly part of the problem. Do not attempt to open the setup file in Windows. Truck99August 22, 2005 in Grease Monkey Hangout. As these pads get hot, they offer more friction, and still work well at over 1000 degrees. Mopar circle track question | For A Bodies Only Mopar Forum Officials are trained to find sneaky parts. I thought these were street STOCKS? The setup we choose needs to be arranged so that the dynamics are balanced between the front and the rear suspensions. I think that since SAS is more of a momentum track and the metric cars may not have such a disadvantage. Tech Central - AFCO - Racing I would get the metric arms from Speedway P-N 910-31134-RH (LH) they are 8.0 and 8.5 long. From NE Ohio to North Central Mississippi, everyone has their own ideas and preferences for what they will plant this year. Some people add preload to the sway bar to make cross weight adjustments. 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. It is not advantageous to have the rearend steer to the right at any time on asphalt. Yes, outright violations are penalized, but creative interpretations or improvements in area that have no specific rule usually get the Don't bring that backnext week penalty. Your email address will not be published. Thank you, that forum is a wealth of information. The proper steps to do this are outlined below. Still having problems? the radiator. To sort of act as a pull bar? Location:Austin, Tx. Most Metric cars I've evaluated have rear RC's up around 14.5 inches off the ground. This chassis utilizes our very popular double slotted strut style front clip. We make it with either steel panels, or aluminium panels. And, of course, Terry chose to park it. Online: $349.99. It must show a consistent gain in performance and a logical ideology to the bulk of race teams. 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. See auction date, current bid, equipment specs, and seller information for each lot. There are some different lower a-arms and front suspension things to make them even better. If there is, try to adjust the brake bias to eliminate the adverse condition. The influence of the location of the front MC can be compared to a sliding scale. 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. Designed and built with one thing in mind, WIN RACES. Lee Christjohn of Antigo, WI knows what it takes to win street stock races. Street Stock - (WISSOTA TYPE) - Medieval Chassis PDF Metric 4 Link Setup For Dirt - Annualreport.psg.fr Love it when people explain why somethings done rather than just saying this is how its done., Thank you Jeff! The less fuel in the tank the tighter the chassis will become. Each suspension system desires to do its own thing when lateral forces are introduced from the car going through the turns. Conclusion var contact = "Contact Us"
It is not advantageous to have the rearend steer to the right at any time on asphalt. Current Stock: Quantity: Decrease Quantity: Increase Quantity: Save to Wishlist. I was also wondering, are there any tricks you have to make your tires wear slower without damaging speed. Front End Geometry RacelineCentral.com All Rights Reserved, NASCAR 2K3 Racing Season Garage 101 Guide Download, Creative Commons Attribution-Noncommercial-No Derivative Works 2.5. 35810 FABRICATED CHEVELLE FRAME. Posted August 22, 2005. We had LF 1000, RF1300, LR 200, RR200. 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. 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. We have been softening those setups over the years, but never intended to go to coil bind or bump rubbers. 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. AFCO C2 METRIC PADS $179.99. Roll Center(movement center) circle track 1981 Camaro help Basically, if the suspension mounting points must remain stock, the leaf spring cars will dominate (at least on ashpalt.). This is our 1988 Monte Carlo Stock Appearing Body. ; this was with all four stock trailing arms. A 1 1/2-inch top view misalignment with a 44-inch driveshaft results in nearly 2 degrees of angle at both the tranny and the pinion shafts. You refering to dirt track racing correct? 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. On a three-link rear suspension you should have the front of your right-side control arm higher than the rear mount by 1/3 of the total amount it will travel in the turns. Even when clear rules exist, the track officials are often reluctant to enforce them. Save these setup files to C:\Documents\iRacing\setups\dirtstreetstock\. Adjust the cross weight for more extreme conditions or different circumstances. X-Y-G METRIC STREET STOCK / SPORTSMAN HEADQUARTERs 704-784-5353. The images used are taken from the iRacing Super Late Model setup screen. I dont really recommend it. Metric Street Stocks - Page 2 - Lone Star Speedzone Forums Setup Tips for Metric on asphalt racecheep. Shocks Download the Jet Mod Scale & Setup Sheet Here! BBC Truck Header 2 1/4in X 4in Fender Well Schoenfeld 2348 . FOR 78-88 GM METRIC CARS. 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. I think Terry has already tried, but we'll try again. I was wondering if anyone out there had any experience circle track racing a mopar unibody. If you could slide the MC to the right, or outside of the turn for you road racers, the front end will get stiffer. 10. Its important to make even adjustments, meaning you should make the same number of clicks on each spring perch. I ran a metric street stock at HMP for a number of years and was definitely not at a disadvantage. Pay attention to the left front tire temperatures versus the left rear. 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. 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. They should be matched up within a couple of degrees of average temperature across the tread. 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. Sometimes weather differences will require changes to either tighten or loosen the setup. Unbalanced setups exhibit easily observed characteristics, such as unusually high degree of wear and temperature on one tire versus the other tires. Strictly asphalt street stocks and parts. Christjohn likes to get to the track early and get his car set up so he can watch the races. 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. 10702FMI FRAME & CAGE - FAB IMPALA MOD. We had LF 1000, RF1300. Would it be too much of an advantage to let these guys run a 3-link rear with solid links and panhard bar? This configuration is common in General Motors cars built in and around . so I ran a .185 valving. Polyethylene Film / PE Sheet Brake Bias If the car is tight under throttle, or driving off the left rear, invert the spring perch offset adjustment procedure above. My truck has weight jacks and a stock 4 link. 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. That's just a thought, i don't know that for sure. I haven't plotted it all out but four links, none of which are at the axis of rotation, would tend to fight each other as body rolls. 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. Has gone 1.29 60 ft on spray, has 28 10.5 et street tires on it also. Then it's done! 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. Asphalt_Gundam - G body that turns - Grassroots Motorsports Maybe if Billy would be more specific about how he made his stock setup work we could learn even more. That is the best description of the result of the dynamic force that influences each system. 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. 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. Oct 12, 2013 #2. Most of the time when some ask the question they are at that point and just don't know it. 266. For a better experience, please enable JavaScript in your browser before proceeding. What do I do if the car is loose or tight throughout the corner? When the LF is too cold, the RR spring is too soft. . As each season comes along, our knowledge of what we need and desire grows. Street Stock Setups. Administrator. The RC height will move with vertical movement of the rear of the car. If the car feels tight on corner entry, raise the left track bar. Using our asphalt design technology as a building block and the dirt experience of our new shop foreman we designed our first dirt late model. . Join OSR Voice/Text Chat.