Cars that don't turn well are very likely to have poor MC designs. Remember, we're still using stock components, we're just making small relocations of those points. Most Metric cars I've evaluated have rear RC's up around 14.5 inches off the ground. I measured ours at close to 20". Cvracer5. So, we either lower the rear RC or soften the springs, especially the right rear spring, or preferably do both. Antidive helps prevent sudden nose dive on entry by mechanically resisting the downward motion of the suspension using the rotational forces created through braking. Welcome, Guest. The car will turn better and we will have more bite off the corners. 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. The MC should always be somewhere close to the centerline (i.e., midway between the tire contact patches). As the car is lowered, the rear RC will generally move down. The moment arm is 5.5 inches for the Late Model and is much easier to set up. Tire Tools. Each end has its own moment arm length and resistance to roll as well as other factors. Coreless Stretch Film; Pre-Stretch Film; Hand Roll; Machine Roll; Jumbo Roll; Industrial Plastic Division. Lift earlier, and/or drag the brake just a little bit on entry. It's on a car that I'm helping with. Use the "new" 7 inch arm on the RH and the 8.5 on the LH. Wonder how fast it would be if I changed the locations. Estler's Mortgage Lifter is ideal for growing in northern climates due to its ability to withstand cooler temperatures better than other varieties. I don't know much about spring adjusters hidden or otherwise but I'd say they could be made to work. Much of the same information translates over to NASCAR Racing as well. LIT-721 80293NDP 2009-2015 Cadillac CTS-V HE. The metric cars can use different size spring spacers as well, so the playing field is already level in that respect. Brian Wise. Brake Bias That was the only time that car was really fun to drive even though I opted not to go to tech because it was not legal for THR rules. Jul 25, 2011. Ackermann is easily checked by using a laser system or strings. This variety grows best when grown alone and can reach up to 12 feet tall. Get it right or don't get it at all. Moving the pull-bar or just the third link to the left increases the loading on the LR tire during acceleration. Join OSR Voice/Text Chat. Don't get me wrong, I like our leaf car for obvious reasons, but it would be cool to see a bunch of metrics out there running well also. This was taken at Butler Speedway in Michigan. 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. 10702FMC FRAME & CAGE - FAB CHEVELLE MOD. Eliminate most of your bumpsteer and Ackermann and install the correct steering ratio for your track that would suite the driver. Basically, if the suspension mounting points must remain stock, the leaf spring cars will dominate (at least on ashpalt.). The problem on dirt is the high rear roll center. March 27, 2015. 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. You can then make fine adjustments with the sway bar preload if desired. The images used are taken from the iRacing Super Late Model setup screen. Pavement Late Models Stock Cars. I was wondering if anyone out there had any experience circle track racing a mopar unibody. 10702FMI FRAME & CAGE - FAB IMPALA MOD. 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. Add Comment. 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. Contact Us. 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. Get the best deals on Asphalt Oval Racing Parts when you shop the largest online selection at eBay.com. Wheels. I think Terry has already tried, but we'll try again. I don't really encourage that method. Great advice! Thats with a 305 a ton less HP. Just trying to help someone. Take the RH arm and cut the tube off at the cross shaft, cut 1" off the tube and weld it back onto the cross shaft. With several wins and a championship under our belt after the first year . 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. Then it's done! With so many different combinations of possibilities it leaves us with literally thousands of possible chassis combinations to choose from. This is our 1988 Monte Carlo Stock Appearing Body. But if you cant 11 inchers is all you can go. 266. How to Lower the Cross Weight in an iRacing Setup. I thought these were street STOCKS? My truck has weight jacks and a stock 4 link. Adjust all four spring perch offsets to change the cross weight. Adjust the cross weight for more extreme conditions or different circumstances. Often overlooked in the mainstream, dirt track racing is one of the most exciting forms of tire-scorching car racing action. 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. by RonL Fri Jul 17, 2015 12:02 am, Powered by phpBB Forum Software phpBB Limited, Shocks, Springs, Brakes, Frame, Body Work, etc. MSRP: $515.99. Posted August 22, 2005. Try to at least get to 53% front and 53% left weight with out adding ballast behind the rear wheels. Ive raise the center section of the chassis where the the upper mounts attach by 3". Always try to start with the track bars first. I followed the progress of the THR #01 SS very closely and when Terry says he tried everything legally possible to get that rear end to quit binding up during body roll, he's not exagerating. There's a happy medium between running just the right soft right rear and going too soft. However, they should be required to run he two stock lower rear trailing arms in their stock locations. To sort of act as a pull bar? Aero Package As each season comes along, our knowledge of what we need and desire grows. Last couple of years I ran the car we just used tubular ones with rod ends because it was legal and easier. That's one thing I've really never understood about some street stock classes that don't allow weight jacks. Also has a anti roll bar added to it. 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. The car is loose mid to exit with not foward drive. 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. But there is still some changes to be made from track to track. JP is that the car you wadded up and broke your leg? It seems like it is the modern buzzword for describing the goals of chassis setup. Your email address will not be published. So don't try it. It may not display this or other websites correctly. With all the negative BS that tends to permiate these boards these days, I thought maybe we could talk about something real and constructive. Numerous car builders have come to realize the truth in the above statements. 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. Remember that drag is an important aspect of aero design. We took all the cross out like Lee and trailed the RR and did not use much stagger. Street Stock; Other; Best Selling. If the car is tight under throttle, or driving off the left rear, invert the spring perch offset adjustment procedure above. 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. 1 being the most important. 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. A good handling car can make gobs of horsepower and hook it up. Officials are trained to find sneaky parts. 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. Negative aspects might include excessive bumpsteer (more than 0.030 bump in or out in for each inch of travel is considered negative by most designers), excessive Ackermann (more than a 1/4 degree added steer in either front wheel in 10 degrees of steering input is considered excessive), and incorrect steering quickness. 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. Drag the brake lightly as you enter the corner. One way is to have a rear spring split, where the right rear (RR) spring has less spring rate than the LR spring. 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. And, of course, Terry chose to park it. I have little experience on dirt but can definetely notice this! FOR 78-88 GM METRIC CARS. Setup Tips: These tips are for an independent a-arm front suspension and 3-link rear suspension type of car, but may apply to other types of suspensions as well. 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. Bump Springs Tech. PREMIER. Contact Us. Dial In Your Metric. Wheel Accessories. I drive both a metric (my truck) and a leaf spring car (ss). Heck, if you are paying 20 bucks to get into the pits you might . Dirt Modified IMCA, Local Tracks. Conversely, if the car feels tight throughout the corner, raise both track bars. So, in most cases, we need to run a softer spring in the right rear. Got protested and is now in limbo! In the last article, I talked about the uses of toe and how it affects both drivability and front-end dynamics. 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 . Lowering the rear RC and softening the RR spring will help solve the problem. Loss of efficiency can rob power from the drivetrain due to the generation of vibrations and harmonics that are also damaging to the bearings. Any angle up hill to the right rear will cause upward force on both tires and unload both tires. Each suspension system desires to do its own thing when lateral forces are introduced from the car going through the turns. Yea how many years ago a1? The front moment center (MC) location plays a huge role in how the front end wants to work. Over the years, most of the things that I have learned about racing, I've learned the hard way. Christjohn has been racing street stocks for 13 years and has amassed 74 feature wins and 4 track championships. That was it. there are a lot of knowledgeable guys there. By 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. . And your choice of aluminum or steel fenders doors and quarters. 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. That's just a thought, i don't know that for sure. The set-up really planted the RR tire. It must show a consistent gain in performance and a logical ideology to the bulk of race teams. In 2010 we made a good car better by a design change with the introduction of the Chevelle front clip. the force of air. It depends on your rule book and it's enforcement. That is the best description of the result of the dynamic force that influences each system. We had LF 1000, RF1300, LR 200, RR200. Dirt Race Life is explaining how to draw out the front end on a race car and determine where the roll center is. Adjust the cross weight for more extreme conditions or different circumstances. We have been softening those setups over the years, but never intended to go to coil bind or bump rubbers. We were allowed weight jacks and after market uppers in front also. Do not seek aero downforce at the expense of aero drag increase. Modified Cars for Sale IMCA Asphalt modified Setup Asphalt Modified Race Cars Asphalt Street Stock Setup Asphalt modified for Sale Asphalt modified Set Up The ULTIMATE Racing Car Chassis Setup Guide and Camber was -2 deg on RH and +2 deg on LH at ride height. Nick might be a better theory guy but I don't think that just adding a panhard bar will get you there. If the LR tire is too cool, then the RR spring is too stiff. is applied to the front bumper & air dam of the car covering the openings for air flow to the various components that are cooled through
From NE Ohio to North Central Mississippi, everyone has their own ideas and preferences for what they will plant this year. The Metric four-link suspension design is a bit different than most other rear suspensions. But the most useful rear steer will only occur on acceleration and not at mid-turn. 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.