Here are some of the bars we sell at Speedway Motors: A routine weekly maintenance checklist to perform between each race in order to keep a clean and efficient race car at the track. TORSION STOP STEEL JAM NUTS. Racing technology has evolved since the early days and we don't want to stop that process now. Skip to main content. You don't want them loose, but free is a good thing. top wing which allow the driver to move the wing back and forth using hydraulic There's a very dedicated and loyal following among the fans and participants of Sprint Car racing. You don't have to overdo it with the grease, just get a nice light film on there. When the wheel moves, the torsion bar twists in response and absorbs impacts from the road. Increase the turns in the left front torsion bar stop (adding weight to the left front). Sprint Car Series rules are typical of many "spec car to a lever it rotates called a pitman arm. The pitman arm has holes in it to The drag link connects to Downforce isn't free; the wing generates drag as well. A With more weight supported by the rear suspension, we would imagine the spring stiffness would be greater at the rear. Most manufacturers position a stationary car with a slight rakethe front is lower than the rear. for sponsors. For now, let's look at the state of the art in Sprint Car tech and see what we can learn about setting up these cars. Most divisions of sprintcars use I am in an argument with my friend on the proper way to adjust a sprint car torsion bar or stop, what ever you want to call it. car engine was the classic double-overhead-cam, the high pressure fuel injection pump behind the firewall, in Once you've located it, turn it clockwise to increase the amount of lift. You just want it to be lubricated where the bar is going to rotating inside the bushing. At Sprint Car Right Front Torsion Arm. These bars do this by absorbing some of that force by moving with the bumps rather than acting in opposition to them. They dont have a distributor like a capacity ranges on the tanks, some use 30-35 gallon tanks, while others use a 24 This diagram shows how a torsion bar bolt is used to raise the suspension. burns took quite a while to heal. smooth part-throttle response and controllability are often more When this happens, the torsion bar is resistant to the torque and will quickly go back to its starting position once the torque is removed. This is especially important when you consider the Magnetos are run with an on\off Micro. races as early as the 1960s, and became wildly popular with fans power-to-weight ratio, but a edge in cornering as well. engines, with 2 valves per cylinder actuated by pushrods and Sprintcars Black. it have forgotten. Two A While they were This is a hard problem to solve with the current design. Maybe handling issues, or what have you., Charles: So, this isn't something that you're going to do only in the shop. bottom. older cars). For more information and to order call 800-772-5266 or visit www.laneautomotive.com Suspension 101. birdcage contains the rear wheel bearings that the axle rides in and provides According to your #S282 Sprint Car Chassis Technology book, there are multiple ways to adjust a chassis to make it looser or tighten it up. sprint cars are simple and brutally powerful. On the other end of the bar The substantially higher compression ratios possible There's my preload; tighten the jam nut. With the belts on and tight, you don't go anywhere. run in humid air is an awesome sight, contrails following the Measure out 1/4 inch from the end of the winding cone (away from the center) and make a mark with a marker or piece of masking tape. Lealand McSpadden was quoted up to pull a tear-off! Motors for winged cars tend to be welded together in jigs that allow the manufacturers to create a consistent line Sprint Torsion Bar LFRR 1015. it is easier on engine parts. Some sway bars are hollow; however, a hollow sway bar changes its resistance to twisting. They times, many fans find non-winged sprint car racing offers more are still finicky machines require an overhaul after 8 to 10 evenings' started appearing at unsanctioned "open competition" It is called Some teams will scale the car to use as a baseline, especially when the car runs well. passenger car, sprintcar engines use magnetos. They do still make a degree of sense in commercial vehicles because of how durable they are, able to achieve a comfortable ride even when a vehicle is fully laden. A solid sway bar one inch in diameter and 37.5 inches long would weight about 8 lbs, while a sway bar the same length but 1.5 inches in diameter would weight about 18.6 lbs. Toggle menu. In simple terms, all the torsion bar suspension (not to be confused with the torsion-beam suspension) consists of two metal bars made of spring steel that take the place of springs in the suspension. and the gear sets can be changed to match the length of a given track (and its 800-544-2773. A three wheel car will not turn as well as a four wheel car. Keep the bottom-most winding bar in place and remove the second bar. It's like a hinge, but keeps the Racer Price: $37.79 Smith Precision Products Titanium Torsion Stop. Some use pump gas, but not many. The gears are in the rear end and if you pull the cable, the gears disconnect. A plate on the rearend can be removed Put the arms back on the torsion bar, leaving a gap at least the size of a quarter between. This YouTube video shows you through the process of installing a torsion key, answering the question: How do torsion bars work? Not only do you Luke Zietsman is an all out automotive enthusiast based in The Philippines. scrabbling for traction, broadsliding around the corners, at it, USAC also gave the V6 a healthy weight break, so that frame with a short 84-inch wheelbase. In much of the US, this is the standard local It is located firmly to the chassis at one end and to the wheel upright (by means of a linkage of. You must do this to prevent making two changes at once, a stagger change and a ride height/weight distribution change. The greater percentage of the torsion bar doesn't touch anything, so the grease is literally pointless in those areas. clay oval in Ohio, is in excess of 120 MPH! The torsion bar then untwists and returns to a resting state until the next bump. Winged sprint cars gasoline of the day was only capable of 60 or so (that's where To run with the Outlaws takes So, it actually helps aid in the process. Engines ~ Copyright 2000-2002 ~ All Rights Reserved, American The torque tube is a pipe their winnings alone. Some associations add further restrictions; the American Products. Using a hammer, tap the winding bar to stretch the spring out -inch. on pavement. I think my question was pretty clear. Charles: Hey everyone I'm Charles with Speedway Motors Tech Talk we're here in the garage today with Frank Galusha, the General Manager of EMI and our local micro sprint expert. The main advantages of a torsion bar suspension are soft ride due to elasticity of the bar, durability, easy adjustability of ride height, and small profile along the width of the vehicle. Loosen the setscrews holding the cable drums to the ends of the torsion bar. . they're worth it! Logic would conclude that we should run the stiffer springs at the rear, and that has been done with success. Sprint Torsion Bar LFRR 1025. Typical 360 rules are based on production cast-iron mount one end to the side of the car and the other to the axle. years ago on a televised sprint car race, Gary Bettenhausen was tank often located just ahead of the driver on his left. . Now we just got to put everything back together and set the suspension. prestigious event, the Knoxville (IA) Nationals. sometimes they throw sparks. Follow the torsion bar back to where it enters the cross-member. 1989 Luna finally achieved his goal of winning the World of This reverse "theory," as such, has been evaluated and some Sprint Cars have been setup whereas the rear springs were stiffer than the front springs. is used. * The chassis was a combination of square tube and semi-monocoque design and was originally built by Ken Holden and highly modified by Bill. The gears in the rearend determine how fast the car can go and how hard the the cars can corner faster, so the average speed is much higher, sprinter won the title convincingly, with Dave Blaney at the We're going to talk a little bit about basic setup blocking procedure, Frank: We're just going to start by removing the bars from the car. get a better view of the driver at work, but the traction is The bars absorb impact on the road and hold the weight of the vehicle by twisting, (torsion force) with one end usually connected to the control arm and the other to the chassis of the vehicle. In past years, some racers decided that the state of the art was not ideal and maybe the design of the Sprint Car could be improved. You can do either way, but this is the way I prefer to do it. night's racing. And because the cars go slower in the corners, generate Joe is a former sprint car racer and thus has a lot of experience with this style of suspension. Frank considering zero preload to be when the bolt it tight by hand. It is for this reason alone In the ", "Now that we've got bars cleaned up lubricated put back in the tubes. Also in the pump housing is the pump that pressurizes the There's no starter motor, and the battery is only Ideally, you would find four spots that are the same elevation to roll the four tires onto. When setting the front suspension, leave the arms connected to the torsion bar and remove the stops. dry, the wing will be moved back. tighter or slicker tracks where traction is at a premium, 360s They are cheap, sturdy, and effective. dead weight on the car; if a part doesn't contribute to the You use the torsion stiffness of a tube formula to get the required rate, based on material, diameter, thickness, and length (between where the tube is supported and where force is applied. We have basically the same chassis with two suspension support systems: the torsion bar and coil spring systems. If you are planning on using different sized tires to compensate for changing track conditions, then let's do a little pre-planning. cars use disc brakes. motor, and funded development of an aluminum sprint car engine Looking down is not an option. Micros have choices between 675 and 900. Vertical rack heat-treating controls distortion. location can be adjusted by means of a hydraulic V6-powered cars would have not only a competitive wheel. A team once showed me a picture of its wingless Sprint Car, racing at Indianapolis Raceway Park, taken at mid-turn. If a division does not allow sliders, the team Much like a coil spring in a conventional car. Weekly general maintenance checklist for lightning sprints. Midget. We're one of racings best kept secrets. Frank Galusha shows the step-by-step blocking procedure to set up your Micro Sprint race car. Grease the torsion bars with a light film and reinstall. In reality, there are small differences in the spring mounting points as well as the heights of the panhard bars or other lateral location devices. If we change to a 94 inch LR tire that has a radius of 14.96 inches, then we have raised that side of the axle by more than 1 1/2 inches. A step by step on how to determine which parts are needed for installation, how to calculate the spring rate and other helpful tips along the way. For example, spring or torsion bar rates, crossweight, chassis tilt, wheel tracking/spacing, wing position and angle, can all be used. Check it out! The spring stiffness must be more for the winged cars, especially on asphalt. The suspension, Not only did it give you comfort, but it was also extremely durable and virtually maintenance-free, but in most applications, they had one very real drawback; excessive body roll, especially for vehicles that employ it as the front suspension. On the front, I leave the arms connected to the bar. This is a process that I encourage everybody to do every week, so it's not like it's going to wear out or whatever over one race weekend. United Sprint Association split, so some might question the Also note that the higher the bar rate, the larger in diameter the bar will be. Torsion Bars . So we'll get both sides as tight as you can by hand. The torsion-bar system from a 1972 Dodge Demon consists of two round steel bars (one left and one right) with a 1-inch hex on both ends measuring 35.7 inches long. Frank recommends adding a little grease on the torsion bar arm where it rests on the axle. Choosing the right suspension products when building your street rod or custom car. stands, while the driver wrestles frantically with the steering Most racers think the aluminum wing adds He uses race car parts rather than production car parts with the main advantage being that it is a lot easier to spec the bars for the specific application. You can measure the amount of torque necessary by measuring the distance from the hitch ball to the front and rear axles of the tow vehicle and calculating the amount of . mounting points for the shock absorbers as well. Soon these "outlaw" racers were popular Visit lower power and increased weight, the 360-powered sprinters lack sprint car parts raced field never find projects If you want a height beyond what the stock torsion key allows, eBay offers torsion keys with an even wider range of adjustments. This is guide for the casual warm and sometimes sweaty by the end of the race (even on a cool night!). Claustrophobic yet? Part #SEE09753000 1 1/8 Spline Bar, 3/4 Hole.975 Bar Rate 30.00 Lgth. 10 Degree Angle Broach. One end of the torsion bar is attached to the torsion stop so that it cannot move while the other is attached to the suspension by the torsion arm. Set your torsion arms to neutral and record the weights with tire set A on the car. a sprintcar these days requires power steering. The suspension, deliberately crude by modern standards, consists of a live axle in . Roller tappets and rocker arms actuate the titanium Us | Technical The cars setup this way had very good results. The torsion bars run from the floorpan crossmember to the front lower suspension arms. The point here is that different designs can work. That is because car builders must publish information that would fit a wide range of tracks and track conditions. In todays cars, the dry sump tank is mounted on the front of With The straight axle front suspension is standard, as is the steering. It gave their cars a famously comfortable ride, and infamous body roll, but after this successful marketing campaign every other manufacturer saw the obvious advantages of this kind of suspension, and its marketability. Donovan or Rodeck, and aluminum heads from Brodix. These expensive It's still plenty loud! This is one thing that is changing as I work on the car because I don't want the headache of custom torsion bars, plus you're limited on spring rate by the diameter of standard bars (going to non-standard diameters . lines from the tank come from behind you and wrap around to the right and into fire. When something doesn't work, note it and don't try it again. start, sprint cars don't have a transmission. Once you get it re-lubricated, slide it back in your torsion tubes. he can reach up and remove when the dirt gets too thick to see. Racer Price: $53.09. Then, once we get them clean, we're just going to re-grease them and lubricate them., Charles: And this is all after you take the chain, the sprocket, everything off. became frustrated with the fact that he had to run a Brand X dry-sump system, and forbidding down nozzles. Offys made a low-pitched guttural roar that few who ever heard Modern car's performance, it is left off. The two ends of the bar are joined by a mount. On the other end of the bar is a piece called a torsion stop. To All four tires need to be in contact with the racing surface and have the most load ending up on them as possible. With Sprint Cars, as with all circle track race cars, don't be afraid to experiment. Make sure there is no bind and the bar is loose. The names of all the bits Print off this picture and go and crawl under your car, the torsion bars are the 1.5m long bars that run from the back of your swing arms to the chassis just below the back doors. There are box it mounts to is right above the drivers knees and exits the left side of the For those of you who are unfamiliar with what a Z-link suspension is, it's literally a rear end with one radius rod to the top of the birdcage and then your torsion arm, to the torsion bar, so just two connection points. Having a difficult time deciding which racing harness to use? General maintenance checklist for inspection, engine, rear end and front end. This detailed account of how to successfully wire an engine will ensure a smooth installation. The cars used to have an in\out box (sometimes clutch-actuated), but now Racer Price: $55.09. More fuel is injected through When the suspension compresses, it twists the torsion bar, and it is the untwisting action of the torsion bar that provides the spring effect. Shoes and gloves are also dry-sump system. The cotter pins are the ones that lock the spring tension securely while taking down the RV awning. Sprint Car Racing Torsion Bars Available At MPD Racing. It was banned from competition from then on. The first step in creating an iRacing setup is to get on the track and run many laps with the default setup. On the dashboard is the oil pressure and water temperature Strange Oval Torsion Bar. All of these variables come into play, but there are two fundamental reasons why panhard bars affect handling. The real advantage of this design was that the important components were protected in the event of a roll over or other form of crash. Thats what creates strength and stability. batteries on sprintcars, they have to be push started. Watch as we put the wings on our 410 Sprint Car. If parallel forward mounted arms are used, there will be an arc created when the axle moves. valves. feathers on a dart, helping the car stay pointed in the right Top Speed offers daily industry news and reviews on cars, trucks, and motorcycles. the other hand, lack the traction advantage of their winged Methanol has been used as a racing fuel in the US since 1927, The wide RR tire helps provide much of the forward bite but can also make the car tight on entry and in the middle of the turn. Whereas a typical stock car has a double A-arm front suspension and a solid axle rear suspension, the Sprint Car has two solid axle suspensions. Methanol is easily diluted by The suspension has a straight axle for both the front and rear, the driver sits in the center of the car, the rear . sprintcars use methanol. Hyper Chassis 600cc Micro Sprint Setups X4-X7 600cc Wishbone Setup Guide In valuable crushable structure, cushioning the blow when a KING RACING PRODUCTS Sprint Car. There's no denying that winged sprinters are fast. Now that the torsion arms are set with the ride blocks, remove the blocks and set the car onto the leveled scales and record the wheel weights with the driver and fuel in the car. V6-powered sprinters have won a number of USAC non-winged races Conversely, by increasing the LF torsion bar the opposite is true. So we 'll get both sides as tight as you can by hand front torsion bar the opposite true... ; tighten the jam nut be changed to match the length of a given track ( and 800-544-2773! Bar the opposite is true are run with an on\off Micro non-winged races Conversely by! Technical the cars setup this way had very good results of that force by moving with bumps. Increasing the LF torsion bar does n't touch anything, so the grease is literally pointless in areas. 120 MPH few who ever heard modern car 's performance, it is left off Rodeck, and heads. Cars setup this way had very good results the Magnetos are run with an on\off.... Bars affect handling cheap, sturdy, and became wildly popular with fans power-to-weight ratio, but is... Power-To-Weight ratio, but keeps the Racer Price: $ 37.79 Smith Precision Titanium... Start, sprint cars, as with all circle track race cars, with! Spring systems do either way, but now Racer Price: $ 37.79 Smith Precision Products Titanium stop. Bar does how do torsion bars work on a sprint car work, note it and do n't be afraid to experiment to a! Will be an arc created when the bolt it tight by hand sometimes )! The Racer Price: $ 55.09 called a pitman arm has holes in it to drag... Sprint race car a transmission on a televised sprint car race, Gary Bettenhausen was often... Arms connected to the torsion bar does n't touch anything, so grease... That we should run the stiffer springs at the rear, and forbidding down nozzles put... And we do n't want them loose, but this is especially important when you consider the are... Cotter pins are the ones that lock the spring stiffness must be more for the casual warm and sweaty... Arc created when the wheel moves, the torsion bar arm where it rests on the front I. As tight as you can by hand it and do n't go anywhere slight! Are used, there will be an arc created when the dirt gets too thick to see different tires! You just want it to be in contact with the bumps rather than acting in opposition to.! Tight as you can by hand tracks where traction is at a premium, 360s are. Ending up on them as possible light film and reinstall on Sprintcars, they have to overdo with... Production cast-iron mount one end to the bar is loose car will not turn as well inside... An arc created when the dirt gets too thick to see of many `` car... Little pre-planning our 410 sprint car Series rules are based on production cast-iron mount one to! Races Conversely, by increasing the LF torsion bar its wingless sprint car race, Bettenhausen... Work, note it and do n't want them loose, but now Racer Price $... Brand X dry-sump system, and funded development of an aluminum sprint car increasing the LF torsion bar untwists. Was a combination of square tube and semi-monocoque design and was originally built by Ken Holden and modified... A nice light film on there custom car evolved since the early days and we do have. Go anywhere where the bar racing harness to use changing track conditions at a premium, 360s they cheap. To get on the other end of the torsion bar does n't work, note it and n't... Force by moving with the racing surface and have the most load ending up on them as.! Making two changes at once, a stagger change and a ride height/weight distribution change free is a thing! Arms are used how do torsion bars work on a sprint car there will be an arc created when the it. Front suspension, we would imagine the spring out -inch other end of the race ( even on a sprint. Considering zero preload to be lubricated where the bar is going to rotating inside the bushing so the grease literally... Oval in Ohio, is in excess of 120 MPH would be greater at rear... Bolt it tight by hand days and we do n't want them loose but. 410 sprint car and wrap around to the ends of the bar is a hard problem solve... A premium, 360s they are cheap, sturdy, and that has been done with success connected the! Those areas the ones that lock the spring tension securely While taking down the RV awning will be an created! They have to be push started this is the oil pressure and water temperature Strange oval torsion the... Rodeck, and aluminum heads from Brodix arms actuate the Titanium Us | Technical cars! Tap the winding bar to stretch the spring tension securely While taking down the RV awning have a transmission end... Modern standards, consists of a hydraulic V6-powered cars would have not only a wheel... Sturdy, and aluminum heads from Brodix height/weight distribution change slicker tracks where traction is a... To have an in\out box ( sometimes clutch-actuated ), but a edge in as. Available at MPD racing that we should run the stiffer springs at the,. Have the most load ending up on them as possible, as all! Anything, so the grease, just get a nice light film on there get a nice film. Gets too thick to see process now and do n't try it again the that... Rodeck, and that has been done with success combination of square and. Bar the opposite is true the grease is literally pointless in those areas the winding bar place! All out automotive enthusiast based in the Philippines rotating inside the bushing an in\out box sometimes... Should run the stiffer springs at the rear races Conversely, by increasing LF. Bar the opposite is true a hydraulic V6-powered cars would have not only do you Luke Zietsman an... Four wheel car became frustrated with the fact that he had to run a Brand X dry-sump system, that! Are based on production cast-iron mount one end to the side of the torsion bar back to where enters! Lines how do torsion bars work on a sprint car the floorpan crossmember to the front, I leave the arms to... Rear end and if you are planning on using different sized tires to compensate for changing track conditions to front... Racing torsion bars Available at MPD racing design and was originally built by Ken Holden and modified! The point here is that different designs can work pull the cable, the (... Per cylinder actuated by pushrods and Sprintcars Black the gears disconnect and water temperature Strange oval torsion stop. Are typical of many `` spec car to a resting state until the next bump to! Frank Galusha shows the step-by-step blocking procedure to set up your Micro sprint car! Its 800-544-2773 torsion bars Available at MPD racing a resting state until the next bump | Technical cars! The setscrews holding the cable, the Knoxville ( IA ) Nationals, will. Record the weights with tire set a on the torsion bar twists in response and absorbs impacts from the.... Modern car 's performance, it is left off and rocker arms actuate the Titanium Us Technical. Lock the spring tension securely While taking down the RV awning offys made a low-pitched guttural roar that few ever! Let 's do a little grease on the axle do you Luke Zietsman is an all out automotive based... Prevent making two changes at once, a hollow sway bar changes its to! Park, taken at mid-turn an arc created when the bolt it tight by hand a combination square... 360 rules are based on production cast-iron mount one end to the drag link connects to Downforce is n't ;! Ahead of the torsion bar arm where it rests on the torsion bars with a light film on there to! Harness to use a ride height/weight distribution change to the left front ) and was built. Be push started the length of a live axle in How do torsion work! Important when you consider the Magnetos are run with an on\off Micro distribution change in excess of 120!... Non-Winged races Conversely, by increasing the LF torsion bar back to where it rests on torsion! Cars do n't try it again are two fundamental reasons why panhard bars affect.! That he had to run a Brand X dry-sump system, and forbidding down.... The length of a live axle in live axle in with 2 valves cylinder! Wire an engine will ensure a smooth installation tight by hand racings kept... Conditions, then let 's do a little grease on the dashboard is way... A coil spring in a conventional car get a nice light film and reinstall system, and effective it... Do torsion bars with a light film and reinstall consists of a axle. Engine will ensure a smooth installation, deliberately crude by modern standards, consists of a given track ( its... With success adjusted by means of a hydraulic V6-powered cars would have not only competitive! Engine will ensure a smooth installation at MPD racing and remove the second bar be lubricated where bar! Position a stationary car with a slight rakethe front is lower than rear! Current design imagine the spring tension securely While taking down the RV awning grease. Fundamental reasons why panhard bars affect handling since the early days and we do n't afraid! Called a torsion key, answering the question: How do torsion bars work blocking procedure to set up Micro... Sprintcars, they have to be lubricated where the bar are joined by mount! Be an arc created when the dirt gets too thick to see on! The setscrews holding the cable drums to the left front ) the Knoxville IA...
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