Forward bite dirt modified. Too much rebound pulls the tire off the ground and makes the chassis push mid-corner to exit. Rear suspension: 4 bar. Stacking Springs for 2. When combined with the outstanding forward and side bite of the Ellipse it is a hard-to-beat combo. Aug 30, 2013 · Hyper Racing. This package provides more forward bite and side bite than a standard 250 lb. left) -More LS weight. Car is a 2016 Blue/Gray Rocket. The idea of side bite, the tires digging into the dirt when sliding, then became someones reason of why these changes needed to be made. Apr 13, 2016 · The idea behind the Neu Torque Arm is to create a way to provide the race car chassis with more stability and forward bite coming out of the corners by harnessing the acceleration and forward Aug 15, 2018 · 4-link suspension information. “Just want to thank bicknellracingproducts. Agreeside bite is the force keeping the car from passing itself getting to the center of the corner. Center of corner being defined as the slowest part of the corner. TIGHTEN CAR ON CORNER ENTRY. Jan 31, 2024 · The double spring right rear uses a 10” x 100 lbs. A second light scuff session followed by storing the tire several days or even a week is recommended, and has proven to be ideal for preparing a tire for If there is one thing we usually cannot get enough of it is forward bite in our race cars. barrel outer spring. Then when the track dries out, the rebound can be increased to create more forward bite. 2) As the torque arm rises, the front of the rear end is rotating upward which is changing the relative location of that end of the j-bar (where it Modified North East Dirt Axles $ 280. Check the spring rate. #2. ·. Nov 13, 2013 · The focus is mainly the dirt late model and dirt modified race cars, but the general principles I illustrate can be easily supplied to any type of dirt race car or any race car in general. 4 LINK DIRT SUSPENSION. It should be between 400-500 pounds per inch. A good starting point on the right front of many modified cars is a 3-8 shock and a good starting point for many street stock type classes is a 4-10 shock. Aug 5, 2013 · Is it possible to have to much forward drive and if so will it make the car slower? I was having problems with forward drive and made adjustments to help forward drive but the car is much slower now. The Dri-Bar is currently available for sprint cars (winged and non-winged), midgets (winged and non-winged), dirt late models, 600 cc and ion 270 cc micro-sprints, as well as other custom applications. In theory that should make the car tighter, in realality it actually makes it looser. 5". Apr 13, 2016 · The idea behind the Neu Torque Arm is to create a way to provide the race car chassis with more stability and forward bite coming out of the corners by harnessing the acceleration and forward Lower J-Bar (both ends) = more chassis roll = tighter. The build started in late 2019 from a rusted out '70 Camaro I bought from my dad. If not, refer to steps A. It offers free PDF downloads for educational purposes. If the kart was right, it will now be loose. Bump Stop Spring Deflection Tables. 7#. A well designed 4-link provides good forward bite and the proper amount of roll steer. Feb 28, 2023 · Street Stock Set-up, Leaf Spring (Prior to 2022) Rear ride height should place approximately 1 to 2 degrees rake in car front to rear (You can measure this on the underside of the front stub rails). • Stiffen left front spring. The Metric four-link suspension design is a bit different than most other rear suspensions. Once the car is neutral without heavy braking, then enter the corner at speed with the normal brake pressure that would be used in the race or in hot laps and see if the handling changes. Car gets in corner great. LOOSEN CAR ON CORNER ENTRY. What could we be overlooking? Sep 1, 2009 · A Review Of The Design And Location Of Roll Center. Nov 13, 2018 · Tech Talk Birdcage Timing. An opposing pair of tires (tires on the same axle at the same end of the car) will develop maximum traction when they are equally loaded. Could use more side bite from middle out also. LR: 10 psi. • If you’re pushing, move the seat forward. Radial grooves promote side bite by creating edges on the contact surface that increase side bite. Wheel offsets are very important. achieve better forward drive. If your car is too loose, try tightening your camber and caster. Wheel Offsets Air Pressure IMCA Hoosier American Racer Wissota Hoosier LF: 3” offset LF: 10 psi. • Raise left side frame mounted panhard bar on chassis. I am finding limited information, and contradicting information on rear moment center location for the stock mounting location points. All Dirt Late Models; Dirt Modifieds; Lucas Oil Late Models Forward Bite With Kyle Armstrong announced the event is expanding to two weekends of racing with Jun 22, 2008 · I got a 03 GRT Late Model and it is lacking forward bite. 0 what is the affect? If the kart was tight, the kart will now be freer. Mounting an Anti-Roll Bar on a Solid Front Axle. amount of bite in the kart. Sep 8, 2006 · Dirt cars really benefit from this on dry slick, but asphalt cars can usually use forward bite too. spring or 225 lb. Jul 31, 2016 · Know how your car rear steers but lower the roll center will have you moving your bars closer to the rear end. 355 iron block with spec heads. It should be balanced with 50-52% on the left rear. Ive lowered one and both arms and it FEELS like it adds traction because the car hikes up even in the pits, but once it gets to the top of the hike it has less traction than bite. through C. When racing on dirt, watch Jul 11, 2017 · 5th coil spring choices. The left rear shock is one of the most critical on the car. So often the lack of forward bite is about how it's being driven rather then what your sitting on. Run 6-8 laps at no greater than ¾ speed, then let the tire completely cool down. It should be between 1-2 inches of rebound. If it gets too far forward, you could have a tendency to unload the front tires and pick up a corner exit push. inline, even on dirt. Makes sense and explains why the adjustments work. Nov 1, 2000 · Some people want to build with the philosophy that 52 percent up front will provide good forward bite (forward bite is the key to successful turning on road courses) while others think 50/50 is Modified Set-up Manual Technical Information Available at 515-432-6972: 8:30am-4:30pm Monday thru Thursday 8:30am-3:30pm Friday At Harris Auto Racing we manufacture our own chassis designs for the Modified divisions. The uphill RR trailing arm adds anti-squat to the car which helps forward bite under acceleration so I like to run some uphill angle in the RR trailing Jun 22, 2008 · Could use more side bite from middle out also. Forward bite is slightly reduced to a degree (from Option #1), but If good, proceed to the next step. RF: 3” offset RF: 16 psi. This configuration is common in General Motors cars Students follow the Racewise Chassis School Manual, which includes over 150 pages of illustrations, guides, diagrams and chassis tuning tips that many consider “The Bible” of dirt track racing. Everyone has their own way of doing it, but some techniques are more successful Jan 31, 2024 · Increasing the rebound in the left rear shock will create more forward bite and free the chassis up on corner entry. dont even mess with torsion bars on pavement) -Front sway bar (Bicknell makes a front sway bar kit. stay there and tune the handling with the other components. It should be between 1/2-3/4 inch. RF: 15 psi. I absolutely hate those diagrams that attempt to show you visually where corner entry, corner middle, and corner exit are. with spring rubbers. Apr 22, 2021 · When the four-link setup was run under Tremont’s care, he won the 1999 Super Dirt Week race with it, as well as others around the region. Now you can add weight as needed to obtain desired rear percentages. May 15, 2023 · News, Previews and Star-Studded Guest From the World of Dirt Late Model Racing . Too much angle or forward bite will cause the left front tire to lift off the track. The rebound holds cross weight in the chassis which creates forward bite. MachineMasters. Pinto Spindles on a Dirt Modified. Left-side weight can be manipulated by moving ballast or components in order to increase the amount of weight transfer. above. Fuel cell above frame rails, all lead up high etc, etc. Jan 7, 2021 · We can just say in general more wedge makes you freer on decel. Leaf Spring Overall Length. Rear Spring Rates on a Paved Track Stock Car. As the car rolls the RR trailing arm will push the rear end housing back on that side. The right rear rebound can be reduced when the track is fast or heavy to help free the chassis up. 3) Every Strange Oval axle is made to twist, you will gain some forward drive regardless of what axle diameter you may choose, all of which are thinner than your normal standard diameter axles…. They lack of rear steer and side bite that the 4 link and Z link set ups give, so most dirt cars have gone that direction where rules allow. Forward bite is slightly reduced Dec 1, 2018 · Nov 30, 2018. However, technology has changed since then and Maresca believes that dirt modified racing is taking cues from late models for its current technological successes. Note-taking is minimal, so students can watch, listen and learn with their full attention. Thinking of trying a 225 with a bump at 3" of travel as I Sep 11, 2013 · When we bought our dirt modified, we did the following to run it on pavement: -Lower frame heights (rake the right side up though vs. . Besides offering a complete line of service to our chassis, we service all major chassis brands, Factor 1 Racing. 55% left and 54. 5% rear about 50% cross. It all depends on how much turning your trying to do when your spinning the wheels. Check the weight of the car. 300 lbs 5th Coil spring at 38. The air dam helps provide aerodynamic downforce at the front of the car. Click Here For More Info. Back in the late 70's Ray Dillon,who was building Mark Martin's cars at the time, ran a 3-spring chassis set-up with 70% left side weight. This obviously means that decreasing cross weight or left side weight will increase the bite that the kart has. ) If you put 40# on the right rear rail, you may only need to put 25# on the left rear rail to keep the diagonal Dec 18, 2006 · This promotes forward bite without causing the car to be tight on entry or in the middle of the turns. The formula looks like this: Longitudinal Weight Transfer = (Weight x May 12, 2014 · May 11, 2014 at 10:51am em5m said: I have a four bar dirt modified and last night it had a bad push was tight in and through the middle and little forward bite off!! After checking the front and rear brake rotor temps the front was 110 degrees and rear rotors where 300 degrees I then realized the brake adjuster had been moved all the way to May 7, 2014 · I run a metric chassis on dirt ovals. Jun 29, 2018 · 3,123. Leaf springs are the oldest form of suspension in racing. Member. The car has currently been competing the last year and a half, but I will start from the beginning of the build. As the car rolls and the chassis changes Dec 22, 2021 · What Does Side Bite Mean In Dirt Racing. 5 percent, or about 75 pounds of left rear weight Oct 26, 2021 · Hey, My name is Cody and this is my 1970 Camaro build. 115”, 1. Raising the rear ride height by limiting lowering blocks to no more than 2 inches while using longer shackles will assist in creating forward drive Oct 24, 2013 · Following the anti-roll bar, you can use adjustable shock absorbers (front and rear), front suspension limiters, and to a lesser degree, specific coil spring rates to get the car to hook up. Dirt Late Model – Axle Diameter Quick Reference Guide: Please call us at (800) 653-1099 or (704) 966-4125 if you have any doubts as to the diameter to choose. 5 to 1 degree of toe-in at the rear of your car. More Dirt Sprint Car. car is 4bar with j-bar (5" rake). Jul 1, 2009 · Apr 12, 2011. 080”, 1. Most of the time, moving the right rear back or the left rear forward is a way to crutch a car that will not The Dri-Bar is a cockpit-adjustable, anti-roll bar system invented by Danny Drinan and produced by Drinan Racing Products. Most times we ran negitive stagger to tighten up the car, although now a days they run emods. 4. Air dam: A metal strip that hangs beneath the front grill of a stock car, often just inches from the ground. The greater the diameter split between the left & right axles, the more “loose” the effect is “on throttle”. J bar: 8" rake. Front Struts and Rear Shocks on a Ministock. Most tires are easier to groove or sipe with the tire mounted and inflated to normal pressures; this is especially true with thin wall racing tires. Check the panhard bar. The reality is this, the secret speed is not in the rear, it is in the frontend. Once the frontend is fixed, there will be less need to do crazy things to the rear alignment. If you’re running a leaf-spring car, the pinion angle is set by the welded perches on the axle housing. Jun 5, 2018 · Wheel Offset Changes. When using a very hard compound, you may want to 1/4 groove the tread blocks allowing for a greater degree of "cleaning" grooves and more edges for increased traction. Dirt Modified Setup Adjustments Focuses mainly on educational books, textbooks, and business books. Four wheels on the ground is faster than three. The #1 thing that I see on a weekly basis is when the track starts drying out everyone want to take stagger out and put some turns in the left rear. run only radial grooves on all 4 tires. The double spring right rear uses a 10” x 100 lbs. SHOP STRANGE OVAL RACING PARTS-Late Model Dirt Axles are utilized by many of the top teams in the NASCAR Sprint Cup, Nationwide & Truck Series. Running on a sticky track with 125lbs. Going the opposite way on the adjustments will decrease bite. There is no wrong choice! Dirt Modified – Axle Diameter Quick Reference Guide: UMP, USMTS & Renegade Axle Diameter Range: LR:1. • Loose means too much front bite. This will help to keep your car more stable in the turns, providing more traction. LR: 7 psi Nov 21, 2022 · One of the simplest ways to gain more forward bite is to adjust your front end alignment. com Monday-Thursday: 8:30am - 5:30pm Friday: 8:30am - 4:30pm Saturday: 9am - 12pm (OPEN SATURDAY ALL YEAR) Feb 1, 2021 · In disciplines like dirt and asphalt circle track racing, suspension setups often require a highly specialized approach in order to maximize stability and grip, and that’s led manufacturers to develop a number of different ways to approach common issues. A-Frame: The upper or lower connecting suspension piece (in the shape of an A) locking the frame to the spindle. For example, if you normally burn 15 gallons of fuel during a feature race, you should put 100# on to offset this. There is no wrong choice! Dirt Modified – Axle Diameter Quick Reference Guide: IMCA A-Mod Axle Diameter Range: LR:1. Forward Bite With Kyle Armstrong. Track Conditions Nov 18, 2014 · Pinion angle simply refers to the angle of the differential’s pinion shaft and yoke in relation to the driveshaft. Often it is not possible to scuff a tire before racing, but if possible, you should follow these steps. As for the bars moving both right side bars together equally doesent technically add abby side bit as masters said it will make the car drive straighter on fuel but doesent really increase the loading (side bite) 01-09-2021, 12:19 PM #4. We have updated the valving in both the right and left rear shocks. Stu Snyder and Jason Martin chat about some possible topics that racers would like to see more information on. Aug 1, 2013 · Too much rebound can limit the amount of weight transferring and negatively impact forward bite, so some experimentation is required to find what fits best for your race car. Sanding the mold nubs off the tread before grooving or siping is suggested if the nubs are large; a tire grinder with a 60-grit sanding pad works well for this. • Lower panhard bar on pinion mount. Dirt Track Racing Dictionary. I'm fighting a drive off issue in the slick where i blow the rear tires off coming off the corner and then the they finally hook about the flag stand. Coil Spring Technical Information. 00 Before finalizing your axle diameter choices, please consider the following: 1) Review the information under the “Choose Your Axle Diameter” tab above (or click here ) to get an idea of what the different axle diameter combinations will offer in terms of performance, and what you can expect from them. Get your front end in the track the metric has some bad camber curves and bump steer issues so if your rules allow it address those to. Most of the time, moving the right rear back or the left rear forward is a way to crutch a car that will not 3) Every Strange Oval axle is made to twist, you will gain some forward drive regardless of what axle diameter you may choose, all of which are thinner than your normal standard diameter axles…. A slight lifting is acceptable. This is a big advantage in tuning as well as performance of the shock. The Dri-Bar is a cockpit-adjustable, anti-roll bar system invented by Danny Drinan and produced by Drinan Racing Products. 5 Coil-overs. Recommended Basic Setups. Leaf Springs. 56-60 percent is great and since cross weight is more of a tuning option i would go with bite. “Just want to thank Jul 1, 2008 · After installing the new springs, changing the front cambers, moving tires around and adjusting tire pressures, we re-set the cross weight at 48. A. LF: 10 psi. The left rear valve curve has also been updated to improve forward bite. 100” , 1. Dirt Web Front: 3077 (Green, Blue, Silver Gold, A2, R2) Ellipse Rear: 3196 (Black, Green, Blue, Silver Gold, A2, R2) (Pictured: JConcepts Ellipses) Apr 4, 2023 · It should be between 7-9 degrees. stagger. 100”, 1. At best, any trailing arm arrangement is a compromise between forward bite and roll steer. We only care about the MC location after the car has taken the attitude of dive and roll in the turns. The 4-Link Difference . For example I read that spacing the front wheels to the left or rear to the right provides more Jul 8, 2011 · I thought for more forward bite, you wanted the lower rear trailing arms to be mounted low and not up close to the axle tubes ? I strongly disagree with that notion. A majority of issues start there and creating issues with corner exit with forward bite. Higher J-Bar (both ends) = less chassis roll = looser. Oct 1, 2006 · The Racing Surface The surface we race on largely determines the amount of traction available under power, and we will look at dirt and asphalt tracks separately. This unit… The uphill RR trailing arm adds anti-squat to the car which helps forward bite under acceleration so I like to run some uphill angle in the RR trailing arm. However excessive lifting of left front is not. Utilize the internal bump stop as your key tuning tool to create side bite and forward traction. This goes against what most dirt racers do. REAR TOE. Check the shock absorber settings. To be more specific, for a touring dirt late model, car builders have been experimenting with Moment Centers in the range of 8 to 16 inches left of centerline when the car is in the middle of the turns. Stu wants to know the way we square cars on the rear end, time the bird cages and rear arm length, and how to set the front end. RF: 14 psi LR: 3” offset LR: 12 psi. I remember having 56-60 rear, 100lbs if bite with P225 LR and P235 RR. LF: 8 psi. We have done all we know how to do to increase forward bite. If so, tune the brake bias to be neutral. This update was done to handle the rough better and provide more traction. You'll be able to accelerate harder out of a turn with the increased rear traction (but Jun 20, 2012 · 1) Moving the 5th coil changes the lift point that the torque is pushing into the car. Rear suspension: 4 bar Left upper: 23 degree (we even moved it up 2 holes) left lower: 6 degree Best Suited Track Type: Dry-Slick. 3 links are simple and have good adjustability for all asphalt requirements. • If you’re loose, move the seat backward. The right rear base valve, piston, and valving curve have been modified. What other changes can i do to help increase forward bite. All will aide side bite and help keep the speed up in the corner, but it all has to work together. -More cross weight (LR bite) -Coils on all 4 corners (this is a must. To low of air pressure with the IMCA Hoosier can actually reduce forward drive. Dirt Modified Setup Adjustments Provides a large selection of free eBooks in different genres, which are available for download in various formats, including PDF. Drag Racing Front Spring Tec. “If your car is really tight or really loose during hot laps, you have to take a look at the things that are going to make the biggest difference. 5 and go to -3. • If you have right front camber of -2. This is commonly referred to as J-Bar rake. Here is just a little hint of what is softening the right front spring will add side bite as well as forward bite to your car. (Alcohol weighs 6. Although they are the oldest, they seem to be the least understood. Dec 3, 2013 · As the Bite goes up, the car should be loose off throttle as you lift for entry. moved left upper up, etc. Too much rebound in this shock will make the chassis loose on corner entry especially on older tires. This unit will provide the same entry rate as a single spring but will have a softer exit rate. A shock package designed to adjust from fast, heavy conditions to dry, slick tracks. inner spring with a 12” x 150 lbs. Side bite in the rear and camber curves and bump steer in the front. #3. Here is an answer to a forward bite question I got in an email: Here is the formula for forward bite, it is a fundamental truth in vehicle dynamics: Center of gravity height (CGH), Wheel Base (WB), G-force (G), and the Weight of the car. Maybe understanding what each corner of the car does and how changes to it impact the car and why. The manual is updated every year to provide RaceWise Straight grooves work best for forward bite. well i would think rear percentage is much more a factor. To summarize, if you want to increase bit in the chassis you'll need to increase nose weight or decrease left side or cross weight. Left-Side Weight Left-side weight and the height at which it is mounted is critical for controlling weight transfer (left to right) to produce the correct amount of side-bite. However, the right amount of loose roll steer can help a race car to turn the corner correctly. The left rear shock is compression adjustable Dec 3, 2013 · The Added Stagger will keep it rolling through the center and the wheel offset will give you the sidebite you need to keep the speed up. Jan 31, 2024 · Over the last few years, some Modified rules have changed and now allow adjustable shocks. If you need a bump in forward grip, then try adding 0. Cornering Weight Transfer. If the engine and fuel cell are mounted very low Oct 24, 2014 · Never could get the car or driver qualify well enough to run the earlier heats or the feaure so I ran a lot of late night heats and semis after everyone else had run (well over 100 cars each night back then). The universal joint is the part of this equation that allows the pinion angle to change as needed. Seeing what people have had success with. First thing always is to get the thing pointed straight to be able to apply more forward bite. Driving styles and tendencies also come into play especially in dirt track racing where conditions are constantly changing. All the weight needs to be as high as you can get it. Right upper: 18 degree. We recommend no wider than 3/16" wide of grooves. More J-Bar angle (lower on the axle and/or higher on the chassis) pushes the left rear harder into the track surface and reduces the sliding action of the rear tires. We need to think out how to maximize our bite while we are in the shop before our first race. with Note: raising the left side trailing arm at the chassis end will increase forward traction (also know as forward bite). I'd like to write more but i'll stop for now on it To help the car turn through rear steer you can run the RR trailing arm uphill a 1/2”- 1” at the front. You may also want to try lowering your front end ride height. There was a local Optima USCA race in June of 2020 and that was the goal for the first event. Cross cuts are used to increase forward traction, however if the track has enough bite to run a harder compound tire, you typically are not looking for increased forward traction. To the typical dirt racer, side bite is the idea that the car is rolling to the right, forcing the tires to dig into The Dri-Bar is a cockpit-adjustable, anti-roll bar system invented by Danny Drinan and produced by Drinan Racing Products. bite rr bar bottom hole lr bar middle hole left swing arm in new top hole. Springs are lf 450 rf 400 lr 300 rr 250 purple panhard bar top of frame to center of heim 4. Oct 14, 2021 · The Dirt Webs are our conventional front tire carcass design and width allowing for ample steering. But as you’ll see in the photos, adjustable trailing arms are the first—and best—method of setting up a triangulated four-link for drag racing. right lower: level. For retail sales in the USA call: 716-285-7502 OP#2 administrator@bicknellracingproducts. Scaling a Race Car With High Gas Pressure Shocks. Wider than this may tend to cause the tread block to rip or peel back. Leaf springs possess many desirable suspension features, such as dampening, forward bite, roll over steer, high anti-squat percentage, and high lateral stiffness. 5" warthog down so the panhard bar is 1" higher on frame side. com All Dirt Late Models; Dirt Modifieds; Lucas Oil Late Models; Other Dirt Series; World of Outlaws Late Models; STOCK CARS. In reality rarely will you feel like your car is 100% perfect during a night. Maybe a 1/2” up is a starting point. Landrum Performance Springs – Spring Specifications. 115” , 1 Jan 31, 2024 · The double spring right rear uses a 10” x 100 lbs. Jul 21, 2021 · Prepare Your Tires Prior to Grooving. This option is our maximum recommended offset between the left & right side axle diameters to allow for “on throttle” turn like that of adding tire stagger. Wheel offsets can make a huge difference in fine tuning the chassis which will allow the driver to find a good racing line on the track. Adjusting rear toe angles is one of the quickest, easiest and most reliable forms of increasing rear traction almost everywhere on the racetrack. Left upper: 23 degree (we even moved it up 2 holes) left lower: 6 degree. • Raise left side ride heights (rock up) • Soften 6th coil spring. Feb 23, 2020 · I guess just an understanding in oval racing what the car does especially going in, middle and out of the turn and why we make certain adjustments. August 30, 2013 ·. 58#/gallon x 15 gallons = 98. The Added Stagger will keep it rolling through the center and the wheel offset will give you the sidebite you need to keep the speed up. Going to start listing some set up tips, if you have any to share just let me know. so hc vi vl fl sz ny mv sf vb