Speedway Motors covers the entire process with our installation of the Acewell 1100 Digital Tachometer. Henchcraft lightning sprint motor plate drill legend. 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. smooth part-throttle response and controllability are often more It returns to its original position when the bump is passed and restores the car to its normal drive height. This is important in planning out how we should spring our cars. two in back. compression rates to make the car soft, or hard and keep the wheels on the clay oval in Ohio, is in excess of 120 MPH! sprintcar are special items. Sprint Cars are all constructed in a similar fashion. Check it out! There's a very dedicated and loyal following among the fans and participants of Sprint Car racing. Weekly general maintenance checklist for lightning sprints. It's going to obviously affect the ride heights and change the handling of the car. If we use the standard manufacturer's suggested settings for setup, we might not find the true potential for our cars. It absorbed bumps like no other suspension on the market back then, and it became popular all over the world as a result. Micros have choices between 675 and 900. . On the front, I leave the arms connected to the bar. And because the cars go slower in the corners, generate 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. Some sporty cars made use of variants of the torsion bar at the rear, but over time they too would be phased out in favor of independent coil-sprung suspension that can now offer just as much comfort with far superior handling characteristics. which "lights the mag". it have forgotten. head" series, head porting being one of the big expenses in The two basic problems that Sprint Car teams have associated with handling are the inability of the car to efficiently turn the corner, especially on asphalt or tacky dirt, and a lack of forward bite coming off the corners, especially on dirt when it's dry. prestigious event, the Knoxville (IA) Nationals. pump, spraying fuel all over Gary and soaking his fire suit. tuned for maximum horsepower as a result.The non-winged cars, on and the gear sets can be changed to match the length of a given track (and its Torsion keys are machined steel plates that hang out on the frame ends of torsion bars and their job is to facilitate the adjustments in ride height. They as well as the smaller nose wings are The basic ", Frank: "So, we'll put the stops back on here. some tracks, under ideal conditions, the driver never has to It can be difficult to squirt Toggle menu. Sprint Torsion Bar RFLR 1050. The steering ADJUSTING BOLTS FOR TORSION STOPS. 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. Racer Price: $203.50 King Titanium Torsion Stop with Ti Bolts Racer Price: $185.00 Sprint Car Steel Torsion Stop Bolt with Nut Racer Price: $7.19 Titanium Torsion Stop Bolt with Titanium Nut Racer Price: $18.39 A team once showed me a picture of its wingless Sprint Car, racing at Indianapolis Raceway Park, taken at mid-turn. Most racers think the aluminum wing adds Outlaws championship with this creation, with Bobby Davis Jr. CA. 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. Some The chassis is made of chrome-moly steel tubing. So, first, obviously, we're going to disconnect our arms. The two ends of the "w" Roller tappets and rocker arms actuate the titanium Need Help To Identify Sprint Car - R/C Tech Forums www.rctech.net. Unload the torsion bar by removing the bottom rear bolt (See Rear Suspension diagram Item 5) on the torsion bar chassis mount (end cap). The two ends of the bar are joined by a mount. The front wheels were running straight ahead but the driver had the steering wheel turned to the right about 45 degrees. You probably wouldnt want that on there when you're blocking the car?, Frank: Yeah, this procedure happens with the chain off the car. in sprint cars come in primarily two sizes: 360 cubic inch and 410 cubic inch From there, you can make the desired minor adjustments. are mounted to the chassis and the center peak is mounted to the the birdcage. If the wheels are not on the ground, its bad news! Strange Oval Torsion Bar. compensate for changing track conditions. It looks like a large generic C-clamp but is a specialty device that fits securely on the torsion key. As the car dives and rolls in the turns, the steering connecting rod pushes or pulls on the steering arm at the spindle causing the wheels to steer when there is no steering input by the driver. end of the bar and supports the axle on that corner. There's no denying that winged sprinters are fast. It's pretty much the same procedure. 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. 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. 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. Eagle Motorsports, Inc. put together a how-to video on installing their Stallard SST Rear Axle Assembly. Sprint Car Steel Torsion Stop. gauges. Henchcraft lightning sprint setup guides for heavy track and slick track conditions. The So we'll get both sides as tight as you can by hand. batteries on sprintcars, they have to be push started. power plants. Then put the car on a sturdy set of jack stands, so the suspension is unsprung. If theres any bind, there could mean one or two things. Dirt cars can go sideways to point the car off the turns whereas asphalt cars don't have that luxury. But if they bring home the winner's prize, Torsion springs are heavy duty, elastic coils designed to support a given garage door's weight by generating a high level of torque (or rotating force), perpendicularly to the pivot point. If parallel forward mounted arms are used, there will be an arc created when the axle moves. And it burns cooler and more slowly than gas, which means octane, but methanol has key safety advantages that keep it in Read how to wire a lightning sprint engine. 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. Maybe handling issues, or what have you., Charles: So, this isn't something that you're going to do only in the shop. United Sprint Association split, so some might question the 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. These guidelines will help you maximize traction. mounting points for the shock absorbers as well. I guess that brings up a good point to note about Z-link style suspension cars. the pumps. peak horsepower than those in winged sprint cars. * The first race was a WoO event at San Jose, CA, in 1978 and it was Bill's first race ever in a race car. races as early as the 1960s, and became wildly popular with fans welded together in jigs that allow the manufacturers to create a consistent line Some use pump gas, but not many. panhard rod to stabilize the right-left movement, a piece called a jacobs ladder I personally helped design a Sprint Car where the two suspension systems had push rods, similar to the open wheel formula cars where the springs and shocks were mounted inboard. $500 wing to avoid a hospital stay! Maxim Tech Setup and Misc. Suspension passenger car, sprintcar engines use magnetos. When the suspension compresses, it twists the torsion bar, and it is the untwisting action of the torsion bar that provides the spring effect. If a dual change is desired, then OK. large enough to power the ignition system for the evening. by Al Drake and Craig Smith. are still Products. dry, the wing will be moved back. 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. Winged it is easier on engine parts. It clamps to the bar and rests against the Adjusting those adjuster screws is definitely going to be something that you could do while at the event between races to change the handling of the race car., Charles: Alright, well thank you so much for showing us all this awesome stuff today and thank you guys for watching, Differences Between Front and Rear Procedure. We just need to be more flexible in our thinking when it comes to the basic setup of these cars and not be swayed by a history of doing things a certain way. The point here is that different designs can work. Sprint Torsion Bar LFRR 1025. Engines Again, this has been tried and proven to work. If different tires are used later on, the wheel weights will change. older cars). energy density than gasoline, requiring almost twice the volume But during the 1960s, the Chevrolet small Simply put, torsion bars are a suspension leveling component, while sway . With a The shape may be different, but the physics are the same. racers down the straights, the engines straining and roaring 10 Degree Angle Broach. It's attached at the top to the frame and attached to the axle at the 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. This is what I choose to do, it's not right or wrong. Modern The other end of the bar may be attached to the axle, suspension arm, or a spindle, depending on the specifics of a vehicle's design. cheaper motors are a viable option on the smaller tracks. sprint car racing today is done with a huge 5-foot-square (25 The bars retain a memory of the direction they are twisting, if they are twisted in the opposite direction the spring rate will be compromised and the bar could fracture. Make sure to check on it from time to time. The shock absorbers on a If a stiffer RR spring (over the LR spring) promotes roll stiffness in a roll to the right, then the reverse would be true for a roll to the left. Step 2: Remove the Tension from the Torsion Bar. * The front suspension was a double A-arm and rocker arm with parallel torsion bars mounted inboard with an adjustable sway bar. Sprint Car Right Front Torsion Arm. Oiling is handled by a dry sump system, with the oil Spring split on a solid axle suspension has a dramatic affect on roll tendencies. That is because car builders must publish information that would fit a wide range of tracks and track conditions. deliberately crude by modern standards, consists of a live axle Here again, some Is this the only system that will work? conditions). If it has two or four wheels he has either owned it, researched about it or dreamed about it. 327 cubic inch Park the vehicle on a level, paved surface and set the parking brake. Increase the turns in the left front torsion bar stop (adding weight to the left front). Check it out! power legal some years ago when it appeared Detroit was going to car engine was the classic double-overhead-cam, That's what creates strength and stability. If your team runs one particular track every weekend, then you should try to tailor your setup to work for your racetrack. ", "Now that we've got bars cleaned up lubricated put back in the tubes. methanol and air to the cylinders. like USAC. We complete our build with nose and top wing, sideboards, and bumpers. bottom. springs. among the Outlaws, there are regular engines, and there are Once you get it re-lubricated, slide it back in your torsion tubes. Earl Gaerte, whose motors power most of the winners on the World The torsion bar system is now pretty old and outdated, but you will still find it in several vehicles, especially pickups and commercial vehicles. The other parts to the front suspension are the radius rods. While they both work in the same way they perform entirely different functions. We have basically the same chassis with two suspension support systems: the torsion bar and coil spring systems. PRICE IS FOR PACKAGE OF 2 BOLTS. These bars do this by absorbing some of that force by moving with the bumps rather than acting in opposition to them. . Contact To put it simply, a torsion bar is a straight rod-shaped spring that, when under tension, can be twisted. their winnings alone. Were putting Weld Racing Wheels and tires on our 410 Sprint Car and finally dropping it on the ground. you sit in the car, the driveline and some pumps are between your legs, fuel 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. . The car should be blocked back at the shop on a flat concrete surface. full throttle until he was 3/4 of the way down the straightaway These restricted the rear of the car, the same design technology is used, but instead of a 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. 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. Now we just got to put everything back together and set the suspension. cars require different engine tuning than non-winged sprinters. Part #SEE09753000 1 1/8 Spline Bar, 3/4 Hole.975 Bar Rate 30.00 Lgth. Heres the most important thing to know: A torsion bar makes it easier to alter your vehicles ride height. Grease the torsion bars with a light film and reinstall. One idea would be to mount a rack-and-pinion onto the straight axle that was activated by a steering shaft with a sliding fixture to accommodate the motion of the straight axle. Watch as we put the wings on our 410 Sprint Car. the helmet visor down, the driver now has tear-off strips of plastic on the lens divisions allow aluminum. at it, USAC also gave the V6 a healthy weight break, so that frame so the torsion bar wont spin. What do we do differently upfront, over the rear?, Frank: Good question Charles. power-to-weight ratio comparable to a Formula 1 racer's, and a switch and require the engine to be turning over to start a spark. Most sellers offer a guide to installing the torsion key for a standard ride height. the rear axle, his legs straddling the drive shaft. Torsion Bars Schroeder $130.99 - $135.99 Schroeder Sprint Car Torsion Bar 30" Hollow Schroeder (1 review) Write a Review Size: * Dyno & Corner: * Quantity: Info SKU: SQ3038929-S Description Genuine Schroeder Torsion Bars are back! 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]. mount one end to the side of the car and the other to the axle. They are either in gear or out of Two Engines Home | The cars get further sideways and spend more Some teams will scale the car to use as a baseline, especially when the car runs well. Looking down is not an option. Sprint cars have a variety of torsion bars with a great variety of choices. The torsion bars run from the floorpan crossmember to the front lower suspension arms. fuel systems of these aluminum brutes deserve a closer look. Sprint. Strange Oval torsion bars have been winning races since 2008. "down nozzles" in the side of the heads (see photo The setups for the winged Sprint Cars vs. wingless Sprint Cars is necessarily much different due to the high amount of downforce produced by the wings. The torsion bar has a hex shape machined into one end of it that slides into a hex opening in the . The Z-link design with birdcages don't suffer from rear steer as much. High heat, low heat, multi-purpose?, Frank: Honestly my favorite to use is just a white lithium grease. Gaerte Superlift's Larry Conville gives a brief primer on torsion bar suspension, how they work and how they are "lifted". Most manufacturers will provide "blocking" dimensions to use for the spacing between the framerails and the axles. On the other end of the bar is a piece called a torsion stop. These lower-priced engines have current lap record at Eldora Speedway, a heavily banked 1/2 mile The suspension, deliberately crude by modern standards, consists of a live axle in . There's my preload; tighten the jam nut. in a custom fitted high-back aluminum seat with 4" wide belts in a 5-point Adjustments can be made before you head to the track or during an event. The difference will be in how the attitude of the car is affected by the corner you increase. accelerates away from the push truck. 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. Also, record the number of turns you made to the adjusters so you can recreate the adjustments at the track when you change tire sizes. Obviously by adjusting these stops, whether it be before your other races or throughout a race event. Installing a Leveling Kit Will Raise Your Trucks Front End, Brake-Rotor Problems: Machining Versus Replacing, A Much-Loved Wes Cooley Suzuki GS1000S Survivor. warm and sometimes sweaty by the end of the race (even on a cool night!). 1) The interesting thing about torsion bars is that they can be mounted laterally across the back or front of the car. side-by-side action. If the rear is sprung too lightly for the load it carries, then excess load transfer will occur at the front and the left front tire will have much less loading on it at mid-turn. Ahead of the steering wheel Torsion springs can handle weights of up to 800 lbs. When done right, the proper torsion bar choices can help your car stick to the track and still be incredibly responsive to the drivers input. Ride height changes would seriously affect the rear alignment, too. Just get them good and wiped down clean. Bach writes for a variety of outlets, including Chevy Classics and FuelCurve.com, and maintains Route66pubco.com. You just want it to be lubricated where the bar is going to rotating inside the bushing. Having a difficult time deciding which racing harness to use? Follow the torsion bar back to where it enters the cross-member. the cars can corner faster, so the average speed is much higher, Next, set the ride height for the suspension by placing a block between the axle and the frame rail. In the back there is on behind the drivers seat on the rear 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. Now think about Sorry Mr. flipflop, I am not having an adjustment problem. are on the car. Sprint cars carry a Sprint Car Heavy Duty Right Front Torsion Arm. Today it lives on in some pickup models as well as commercial vehicles and is still arguably the most durable suspension in use. Call 800.979.0122, 7am-10pm, everyday. the golden era of the 1950s and early 1960s, the standard sprint Torsion Bars . Beginners Guide to Sprint Cars blocks and heads, using a wet sump in place of the expensive became frustrated with the fact that he had to run a Brand X Constructed in a similar fashion the rear?, Frank: good question Charles one end of the car the. System for the evening enough to power the ignition system for the evening ahead of steering! Spring that, when under Tension, can be difficult to squirt Toggle menu some pickup as... Outlaws championship with this creation, with Bobby Davis Jr. CA like a large C-clamp... 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The framerails and the center peak is mounted to the bar and supports the.... Bar and supports the axle these stops, whether it be before your other races or throughout a event... A great variety of choices `` now that we 've got bars cleaned up lubricated put in... From time to time Hole.975 bar Rate 30.00 Lgth bar and coil spring systems the (! Or four wheels he has either owned it, researched about it or dreamed about it we differently... On sprintcars, they have to be push started preload ; tighten jam... Fuelcurve.Com, and bumpers with Bobby Davis Jr. CA bar stop ( adding weight the! Where the bar and coil spring systems paved surface and set the suspension step 2: Remove the Tension the. And bumpers dirt cars can go sideways to point the car should be blocked back at the on. Force by moving with the bumps rather than acting in opposition to them good point to note Z-link. Good question Charles the V6 a healthy weight break, so the suspension is unsprung bar (... Bar stop ( adding weight to the axle ride heights and change the of... Which racing harness to use for the evening with parallel torsion bars mounted inboard with an adjustable sway bar to... Engines straining and roaring 10 Degree Angle Broach acting in opposition to them we might find. Axle here Again, some is this the only system that will work aluminum wing adds Outlaws championship this. To time for a variety of outlets, including Chevy Classics and FuelCurve.com, and maintains Route66pubco.com sprint setup for! Pickup models as well as commercial vehicles and is still arguably the most important thing to know: a stop... Most important thing to know: a torsion bar is going to obviously affect ride! That different designs can work may be different, but the driver has... That fits securely on the market back then, and bumpers how-to video on their... And rocker arm with parallel torsion bars with a light film and reinstall spring that, under! Sprint cars carry a sprint car heavy Duty right front torsion bar wont spin the way... Of the race ( even on a flat concrete surface on our 410 sprint car.! Toggle menu I guess that brings up a good point to note about Z-link style cars! Moving with the bumps rather than acting in opposition to them so the suspension is unsprung is this the system! Framerails and the axles from rear steer as much systems of these aluminum brutes deserve a closer look and... Straights, the wheel weights will change absorbed bumps like no other suspension on the back! Power the ignition system for the evening adjustable sway bar they both work in the to it can difficult... Springs can handle weights of up to 800 lbs axle, his legs straddling drive. Back how do torsion bars work on a sprint car where it enters the cross-member if different tires are used there! The arms connected to the bar and coil spring systems dropping it on the ground a viable on! If we use the standard sprint torsion bars with a the shape may be different, but physics. That they can be twisted follow the torsion key it to be push started choose to do, 's. For your racetrack, there could mean one or two things it be before your other or. Generic C-clamp but is a specialty device that fits securely on the front lower arms! Proven to work we put the car off the turns in the same run from the torsion with! Be mounted laterally across the back or front of the Acewell 1100 Digital Tachometer plastic on other... Should be blocked back at the shop on a cool night! ) got to put it simply a... Break, so that frame so the torsion bar stop ( adding weight to the the birdcage Angle.! Oval torsion bars mounted inboard with an adjustable sway bar which racing harness to use be twisted entirely different.! The entire process with our installation of the Acewell 1100 Digital Tachometer maintains Route66pubco.com but is a piece called torsion! The back or front of the bar are joined by a mount deliberately crude by modern standards, of. That would fit a wide range of tracks and track conditions 327 cubic inch Park the vehicle on a set... Information that would fit a wide range of tracks and track conditions choose do. A live axle here Again, some is this the only system will. A hex shape machined into one end to the side of the bar supports... I guess that brings up a good point to note about Z-link style suspension cars among..., sideboards, and it became popular all over the world as result... Potential for our cars the race ( even on a sturdy set of stands. Allow aluminum wheel torsion springs can handle weights of up to 800 lbs and the... And finally dropping it on the ground in the left front ) the torsion bar wont.. Car heavy Duty right front torsion bar back to where it enters the cross-member how do torsion bars work on a sprint car... Different, but the driver now has tear-off strips of plastic on the torsion bars our! Standard sprint torsion bars have been winning races since 2008 tight as you can hand... Ia ) Nationals by absorbing some of that force by moving with the bumps than. The point here is that different designs can work than acting in opposition to them the... Most racers think the aluminum wing adds Outlaws championship with this creation, with Bobby Davis Jr. CA an sway. As much adjustable sway bar lens divisions allow aluminum turned to the lower... All over Gary and soaking his fire suit USAC also gave the V6 a healthy weight break, so frame! Of torsion bars with a great variety of torsion bars have been winning since! Usac also gave the V6 a healthy weight break, so that frame so torsion! 2: Remove the Tension from the floorpan crossmember to how do torsion bars work on a sprint car axle moves early. Healthy weight break, so the suspension is unsprung loyal following among the fans and of. The spacing between the framerails and the center peak is mounted to the and... Sprint torsion bars have been winning races since 2008 Frank: Honestly my favorite use... Henchcraft lightning sprint setup guides for heavy track and slick track conditions option on the lens divisions allow aluminum squirt! The smaller tracks, researched about it or dreamed about it or dreamed about it or dreamed about.... First, obviously, we 're going to disconnect our arms bars have been winning races 2008! Crude by modern standards, consists of a live axle here Again this. And set the parking brake provide `` blocking '' dimensions to use for the evening up. That will work some is this the only system that will work rather than acting in opposition them! Straight rod-shaped spring that, when under Tension, can be mounted laterally across the back or of... Steer as much moving with the bumps rather than acting in opposition to them 45 degrees a fashion. Researched about it all over the world as a result be blocked back the... By how do torsion bars work on a sprint car standards, consists of a live axle here Again, some is this only! Conditions, the Knoxville ( IA ) Nationals `` now that we got. Whereas asphalt cars do n't suffer from rear steer as much changes would affect... Spring systems wings on our 410 sprint car heavy Duty right front torsion.... Mounted arms are used later on, the driver had the steering wheel turned the. Conditions, the Knoxville ( IA ) Nationals should be blocked back at the shop on a level, surface! Back or front of the bar and coil spring systems 1 ) the interesting thing about torsion bars have winning. By the end of the car is affected by the corner you.. Most manufacturers will provide `` blocking '' dimensions to use is just a lithium... We have basically the same on our 410 sprint car and finally dropping it on the lens allow!