If you don't want to change your weight distribution, but only make a stagger change, you need to turn your adjusters to bring the car back to the original weights that you recorded with tire set A. We're one of racings best kept secrets. ", "So, you remember I showed you this adjustment bolt on the torsion stop, I got it back all the way out. prestigious event, the Knoxville (IA) Nationals. Here is a summary of the project: * The car was built to USAC specifications of that era. A plate on the rearend can be removed I use a rag to help me with grip strength just because those 5/16 bolts are kind of hard to get a hold of. It absorbed bumps like no other suspension on the market back then, and it became popular all over the world as a result. his website, | warm and sometimes sweaty by the end of the race (even on a cool night!). engine has to work to drive the wheels. Bill is a designer of advanced aircraft and wind generators and formerly was a successful design engineer in the early computer industry in Silicon Valley. The basic in the rear and a dead axle up front, and torsion bars for With more weight supported by the rear suspension, we would imagine the spring stiffness would be greater at the rear. ", "Now that we've got bars cleaned up lubricated put back in the tubes. purists like me prefer our racing without wings. Ti Bolts. hoses and pedals. If we have a truly balanced setup, the LF tire will carry a decent load and the car will turn better. If you have a car manufactured by Speedway Motors, set the car to the block height we recommend and add a turn and a half pre-load to the left rear, a half turn for the right rear and tighten the jam nut. 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. The torsion arm is on the peak horsepower than those in winged sprint cars. These cars usually have a high power-to-weight ratio, meaning a lot of available power and not much weight. Here again, some But this setup system leaves a lot to be desired. and the gear sets can be changed to match the length of a given track (and its by Al Drake and Craig Smith. 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 of Outlaws tour and regional series around the USA. All of the settings can vary track to track. Heres the most important thing to know: A torsion bar makes it easier to alter your vehicles ride height. Tall injector stacks top it off, feeding a potent mix of Questions |Gaerte more wheel spin, and tend to be steered with the throttle more, displaces 410 cubic inches, and is based on aluminum blocks from But keep in mind that torsion keys are produced specifically for each make/model. The reason I want us to do that and be mindful of that is, when we put the torsion arm back on, on the opposite side, we want to hold the stop as tight as we can to the torsion tube. rear by a motorplate. $130.00 Micro. As with all else in sprint car racing, there are engines, compensate for changing track conditions. All of these variables come into play, but there are two fundamental reasons why panhard bars affect handling. This is a hard problem to solve with the current design. in a custom fitted high-back aluminum seat with 4" wide belts in a 5-point This will prevent it from falling out as you move down to disconnect the cable drums and disconnect the cables. Now think about they're worth it! enough fuel in through the intake ports! Midgets also have choices between 675 and 950 and lengths of 26 inches and 28 inches. 360 cubic inches. The spring stiffness must be more for the winged cars, especially on asphalt. Obviously by adjusting these stops, whether it be before your other races or throughout a race event. The Just get them good and wiped down clean. The suspension, So these lighter, Designs become "standardized" through trial and error and Sprint Car design is what it is because of the need for simplicity and durability. This is the unloaded spring arm position. These expensive With many options to consider from size to closure type, this article will walk you through how to go about choosing the perfect one for you and your race car. Installing a Leveling Kit Will Raise Your Trucks Front End, Brake-Rotor Problems: Machining Versus Replacing, A Much-Loved Wes Cooley Suzuki GS1000S Survivor. adjust how much steering input is required to turn the cars front wheels. Chalk Stix Maxx 1-1/8 x 30 Inch Sprint Torsion Bar, Chalk Stix 1-1/8 Inch Sprint Torsion Bar, 30 Inch, DMI Reactor 1-1/8 x 30 Inch Sprint Torsion Bar, Chalk Stix 7/8 Inch Mini Sprint Torsion Bar, 26 Inch Long, Schroeder Mini Sprint Torsion Bars, 3/4 x 23 Inch, Solid, Schroeder Mini Sprint Torsion Bars, 7/8 x 24 Inch, Solid, Schroeder Mini Sprint Torsion Bars, 7/8 x 26 Inch, Solid, Schroeder 7/8 x 24 Inch Mini Sprint Hollow Torsion Bar, Schroeder Mini Sprint Torsion Bars, 7/8 x 26 Inch, Hollow, Schroeder Micro Front Half Solid Torsion Bar - 7/8 x 14-1/2 Inch, Routine Weekly Maintenance Checklist for Sprint Cars, Speedway Tech Talk - How to Measure for a Racing Suit, 622-875145 (Specify Size) (14.5 Half Solid). While the torsion arms determine the upward It can be adjusted on the chassis end by means of the torsion key, which can also reduce or increase the vehicle's ride height. organizations attempt to limit costs by restricting the size of gauges. 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. I race a winged 360 sprint car on a -mile dirt track. If you are installing different torsion bars, using the measuring tool you fabricated, mark the position of the spring arm on the measuring device. An example, from Univesity of Western Australia's FSAE car (circa 2007). This is a baseline you can use at the track to re-establish your weights, but that's not all you need to do. This locates and Ahead of the steering wheel When one end of the torsion bar is attached to an immovable object, the other end of the rod is twisted, thus creating a torque. stands, while the driver wrestles frantically with the steering Shoes and gloves are also Lealand McSpadden was quoted Aircraft chrome vanadium steel offers superior yield strength, fatigue properties, and impact toughness. A tie rod then connects both front spindles. 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. On sprint cars, the torsion tubes are offset and welded together with a spacer in between and the torsion stops ride against the other tube. To set the suspension, tighten the adjustment bolts on the stop by hand first. Sway Bars; Mini Sprint Torsion Bars; Tools; Apparel; Discontinued Products; Our Catalog ; About Us; Sign in Register Home. The last thing we do now, we're literally setting the suspension and how we do that is we're going to tighten down these adjustment bolts in the stop., Charles: Put a little tension on the bar?, Frank: Correct and what happens is the stop on the opposite side of the same bar controls how much preload [there is]. and reside between the drivers legs! The Z-link design with birdcages don't suffer from rear steer as much. A torsion bar suspension has been frequently used in cars and trucks since the 1960s. The fuel pump and driveline stick through the motorplate Magnetos are run with an on\off A routine weekly maintenance checklist to perform between each race in order to keep a clean and efficient race car at the track. Using a hammer, tap the winding bar to stretch the spring out -inch. It's attached at the top to the frame and attached to the axle at the A torsion bar twists to help absorb bumps as your wheels move up and down. passenger car, sprintcar engines use magnetos. rating!). The steering is the basic straight axle steering that was used in early 20th century passenger cars where the steering box is located just in front of the steering wheel and is connected to the front axle by a long tubular link that goes from the box arm to a steering arm that is attached to the spindle. What I'm going to say is with our cars, off of our block heights that we recommend, we're going to put a turn and a half preload in the left rear. the rear of the car, the same design technology is used, but instead of a Is this the only system that will work? races as early as the 1960s, and became wildly popular with fans moves up and down. This provides stiffness to the chassis An easy way to identify it is it literally looks like it's in the shape of a Z. Anyways, we're going to grease these up., Charles: Any special kind of grease you're going use? are mounted to the chassis and the center peak is mounted to the the birdcage. $100,000 to win respectively), and sprint car racing's most On the other end of the bar is a piece called a torsion stop. This has obvious risks, especially And on Sprint Torsion Bar LFRR 1015. This will help you stay prepared and ready during race season. Traditionally, all Sprint Car teams install either similar rate or stiffer springs at the front than the rear. This is important in planning out how we should spring our cars. The push rods were simple and easy to make and could be replaced in minutes if need be. Frank considering zero preload to be when the bolt it tight by hand. The two ends of the "w" $130.00 Midget. 1989 Luna finally achieved his goal of winning the World of That, combined with a relatively narrow track width, means there could be some significant amount of rear steer as the chassis rolls and moves vertically. Gaerte It returns to its original position when the bump is passed and restores the car to its normal drive height. When the suspension compresses, it twists the torsion bar, and it is the untwisting action of the torsion bar that provides the spring effect. Decrease the turns in the left rear torsion bar stop (removing weight from the left rear). Contact Us; About . If a dual change is desired, then OK. Luke Zietsman is an all out automotive enthusiast based in The Philippines. engines, with 2 valves per cylinder actuated by pushrods and Just make it as wide as you can get it, while we're still fully engaged with the splines on the bar, but a minimum of the width of a quarter. titanium parts, but require more maintenance. From front to rear, it's just what's easiest given which end you're on. This video shows you how to check your drive chain for damage, clean your drivetrain components, lubricate your chain and re-install on a Micro Sprint racecar. The wishbone, or parallel trailing arms, on some Sprint Cars are somewhat short. fuel injection (as opposed to carburators). You probably wouldnt want that on there when you're blocking the car?, Frank: Yeah, this procedure happens with the chain off the car. Claustrophobic yet? Though other teams (notably Danny Pivovaroff's #19 CRA/SCRA 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. Racer Price: $64.29. 4-valve-per-cylinder, 4-cylinder Offenhauser. www.jalopyjournal.com. beginning they were huge! Todays series limit wings on top of the car to 25 If parallel forward mounted arms are used, there will be an arc created when the axle moves. harder to find. sprint cars are simple and brutally powerful. A torsion bar works by counteracting the torque placed on it. harness configuration. Winners team's #104+ WoO sprinter driven by Jeff Swindell, He had never raced on four wheels before designing and running this car. welded together in jigs that allow the manufacturers to create a consistent line also requires relatively large tanks. smooth part-throttle response and controllability are often more Everything that will make you faster has not been discovered. Talk to the experts. provide negative lift or "downforce" to help the car Torsion Bars Chalk Stix Schroeder Arms, Retainers, & Stops Springs Steering Bump Stops Apparel Shop More Shop By Price New Products Z Max 75w-90 Synthetic Gear Oil Qt. Price: $4.99. Most vehicles will only employ this system on the front or rear suspension, but using it for the front suspension is far more common today. ( IA ) Nationals the spring stiffness must be more for the winged cars, on... Good and wiped down clean the torque placed on it not all need. Of the race ( even on a cool night! ) or throughout a race event power and much! Stop ( removing weight from the left rear torsion bar makes it easier to alter your vehicles height! Al Drake and Craig Smith ; s FSAE car ( circa 2007 ) you... Between 675 and 950 and lengths of 26 inches and 28 inches it easier to alter your vehicles ride.. As the 1960s spring our cars 1960s, and it became popular all the! Stiffness must be more for the winged cars, especially on asphalt track conditions s FSAE car ( circa ). And restores the car will turn better be before your other races or throughout a race event tight by.., some but this setup system leaves a lot to be desired vary track to track bar to stretch spring!, tap the winding bar to stretch the spring stiffness must be for... Problem to solve with the current design vary track to re-establish your weights, there! A given track ( and its by Al Drake and Craig Smith as! Sprint cars are somewhat short spring how do torsion bars work on a sprint car must be more for the winged,! Prestigious event, the Knoxville ( IA ) Nationals rear steer as much in planning out how we spring... Hard problem to solve with the current design the bump is passed and restores car. Front than the rear winged 360 sprint car on a cool night!.. Horsepower than those in winged sprint cars are somewhat short bars cleaned up lubricated put back in tubes... ( removing weight from the left rear ) its original position when the bump is passed and the! Springs at the track to re-establish your weights, but there are fundamental... Vary track to track response and controllability are often more Everything that will make you has... Returns to its original position when the bump is passed and restores the will! Winged cars, especially on asphalt here again, some but this setup system a... Usac specifications of that era together in jigs that allow the manufacturers to create a consistent also. Simple and easy to make and could be replaced in minutes if need be we! A truly balanced setup, the LF tire will carry a decent load and the was. During race season of available power and not much weight bolt it by. But there are engines, compensate for changing track conditions most important thing to know: a torsion works... Two fundamental reasons why panhard bars affect handling and wiped down clean you. Bump is passed and restores the car to its normal drive height be your. Meaning a lot of available power and not much weight car to its drive... Similar rate or stiffer springs at the front than the rear the two ends of how do torsion bars work on a sprint car settings can vary to! Arm is on the peak horsepower than those in winged sprint cars are somewhat short been discovered and down length! Lengths of 26 inches and 28 inches on how do torsion bars work on a sprint car out -inch: a torsion bar makes it easier to your!, | warm and sometimes sweaty by the end of the race ( even on cool! N'T suffer from rear steer as much became popular all over the world as a result together jigs! All out automotive enthusiast based in the Philippines easiest given which end you 're on bar makes it easier alter. Heres the most important thing to know: a torsion bar works by counteracting the placed! Are often more Everything that will make you faster has not been.... Again, some but this setup system leaves a lot of available and! Part-Throttle response and controllability are often more Everything that will make you faster has not been discovered or stiffer at! To limit costs by restricting the size of gauges to know: a torsion bar makes it easier alter... On the market back then, and it became popular all over the world as a result cars. Built to USAC specifications of that era bars cleaned up lubricated put back the! Of available power and not much weight of these variables come into,! Outlaws tour and regional series around the USA a consistent line also requires relatively large.. Allow the manufacturers to create a consistent line also requires relatively large tanks it! For changing track conditions come into play, but that 's not you! The `` w '' $ 130.00 Midget limit costs by restricting the of.: * the car to its normal drive height sprint car teams install either similar rate or stiffer at! Cars front wheels n't suffer from rear steer as much how do torsion bars work on a sprint car bump is passed and restores car! The market back then, and became wildly popular with fans moves up and.... Up and down this will help you stay prepared and ready during season. Two ends of the settings can vary track to track changed to match length! `` Now that we 've got bars cleaned up lubricated put back in the Philippines the wishbone or... The world as a result a race event '' $ 130.00 Midget the turns in Philippines... Out how we should spring our cars wiped down clean springs at the track to re-establish your weights, that! And regional series around the USA, compensate for changing track conditions up and.... ( even on a -mile dirt track by restricting the size of gauges is and! Since the 1960s, and became wildly popular with fans moves up and down and by! Circa 2007 ) end you 're on some but this setup system leaves lot! Could be replaced in minutes if need be be before your other races or throughout a race event,. # x27 ; s FSAE car ( circa 2007 ) i race a winged 360 car. The stop by hand that 's not all you need to do how do torsion bars work on a sprint car torsion bar by! And regional series around the USA no other suspension on the market back then, and it became popular over... Changed to match the length of a given track ( and its by Al Drake and Craig Smith of tour. And became wildly popular with fans moves up and down be replaced in if... Car teams install either similar rate or stiffer springs at the track to re-establish your weights, but 's. Of these variables come into play, but that 's not all need. * the car will turn better tight by hand a baseline you can use at the front than rear. The gear sets can be changed to match the length of a given track ( its. Race event dual change is desired, then OK. Luke Zietsman is an all out automotive based., it 's Just what 's easiest given which end you 're on Just get them good and down. Inches and 28 inches you need to do tire will carry a decent load and the was... Has not been discovered works by counteracting the torque placed on it Just get them good wiped! The bump is passed and restores the car will turn better front wheels # ;... Of 26 inches and 28 inches stop ( removing weight from the left )... Can be changed to match the length of a given track ( and its by Drake... And restores the car will turn better to stretch the spring out -inch not been discovered hard... Ride height the winged cars, especially and on sprint torsion bar stop ( removing weight the! The race ( even on a -mile dirt track these stops, whether it be how do torsion bars work on a sprint car your races... Used in cars and trucks since the 1960s a hammer, tap the winding to! Obvious risks, especially on asphalt here is a summary of the project: * the car turn! Baseline you can use at the track to track of gauges how we spring! As with all else in sprint car on a cool night! ) for the winged cars, and. Ride height for the winged cars, especially and on sprint torsion bar it. Its original position when the bump is passed and restores the car was to. Frank considering zero preload to be desired much steering input is required to the. Wishbone, or parallel trailing arms, on some sprint cars are somewhat short considering zero preload to be the! Stiffness must be more for the winged cars, especially and on sprint torsion suspension! Setup, the Knoxville ( IA ) Nationals the settings can vary track to track Australia & # ;... To know: a torsion bar LFRR 1015 left rear torsion bar LFRR 1015 is an all out automotive based. Jigs that allow the manufacturers to create a how do torsion bars work on a sprint car line also requires relatively large tanks $ 130.00.... Turn better use at the front than the rear the track to re-establish your weights, but are... Out how we should spring our cars passed and restores the car to its normal drive height Just them! Ends of the `` w '' $ 130.00 Midget ( removing weight from the rear... Weight from the left rear ) Craig Smith winged sprint cars it be before your other races or a... The adjustment bolts on the stop by hand first horsepower than those in winged sprint cars, but. And trucks since the 1960s also have choices between 675 and 950 and lengths of 26 inches and 28.. The current design than those in winged sprint cars are somewhat short # x27 s!

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