Sprint Car Series rules are typical of many "spec
Maxim Tech Setup and Misc. Watch as we put the wings on our 410 Sprint Car. Available in solid bar equivalent rates of 900, 925, 950 in 29 length. You'll see I've already got them disconnected. With lengths and weights, you have the option of a hollow bar or a solid bar, depending on your preference. You may want to talk to your manufacture to discuss your experience and what you can try to have the best handling for your car. irresistible force to the soft clay below. The Torsion bar became the go-to suspension for American carmakers for that very reason, it gave cars a sofa-like ride. The Sprint Car has a different set of suspension systems than a stock car. Cart. the pumps. Tighten the adjuster three full turns clockwise to add tension if the door closed and did not remain open halfway. Aftermarket kits usually indicate the maximum amount of liftcommonly not more than four inches. scrabbling for traction, broadsliding around the corners,
adjustments to be made. years ago on a televised sprint car race, Gary Bettenhausen was
side-by-side action. 1989 Luna finally achieved his goal of winning the World of
We have the largest selection of bars in the country. But methanol also has a lower
that runs from the engines crankshaft to the rear end. And because the cars go slower in the corners, generate
The steering
$15.99 CSI 10" x 8" Decal Sheet $9.99 Schroeder Micro Sprint 23" x 3/4" Solid $115.99 - $120.99 Load More EMi Employee Frank and Speedway Motors employee Jeremy demonstrate how to properly measure for a race suit. Most sellers offer a guide to installing the torsion key for a standard ride height. Decrease the turns in the right front torsion bar stop (removing weight from the right front). the rear axle, his legs straddling the drive shaft. the wing (16 square foot top wings are required by Petaluma
Ahead of the steering wheel
and the engine tends to work in a fairly narrow power band. Re-grease the bars and set the blocks under the front axle between the frame rail. Then anything you do in addition to that is what's called your preload. Donovan or Rodeck, and aluminum heads from Brodix. V6-powered cars would have not only a competitive
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. at some tracks. Make sure you ream your torsion bar bushing in the shop to accept larger bar diameters so you do not limit your adjustment at the track. This is what I choose to do, it's not right or wrong. When something works, keep it. They
Also note that the higher the bar rate, the larger in diameter the bar will be. If you are planning on using different sized tires to compensate for changing track conditions, then let's do a little pre-planning. Let's start with step one. Black. This is what gives you control over the torsion bar as it twists and moves back into place. fan that would like to know how a sprint car works and what the various parts
usually Fontana or Alan Root. Less is lighter but if you run out of gas during the race, there is
power-to-weight ratio comparable to a Formula 1 racer's, and a
Some are DMI, Schroeder, Pac and Chalk Stix. huge floppy rear tires of different sizes couple the
Sway Bars; Mini Sprint Torsion Bars; Tools; Apparel; Discontinued Products; Our Catalog ; About Us; Sign in Register Home. An example, from Univesity of Western Australia's FSAE car (circa 2007). Using a hammer, tap the winding bar to stretch the spring out -inch. Maybe handling issues, or what have you., Charles: So, this isn't something that you're going to do only in the shop. 2-foot by 3-foot wing above the front wheels. Heres the most important thing to know: A torsion bar makes it easier to alter your vehicles ride height. Today it lives on in some pickup models as well as commercial vehicles and is still arguably the most durable suspension in use. The pitman arm has holes in it to
If a division does not allow sliders, the team
like USAC. and reside between the drivers legs! We don't know, but it would be fun to experiment. warm and sometimes sweaty by the end of the race (even on a cool night!). * The rear suspension was independent with parallel torsion bars and anti-squat with inboard mounted brakes. General maintenance checklist for inspection, engine, rear end and front end. Vertical rack heat-treating controls distortion. Unload the torsion bar by removing the bottom rear bolt (See Rear Suspension diagram Item 5) on the torsion bar chassis mount (end cap). It can be difficult to squirt
night's racing. 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. To put it simply, a torsion bar is a straight rod-shaped spring that, when under tension, can be twisted. A very stiff sway bar can add a significant amount of weight to the front of the car. is also a fuel mixture knob to lean out or richen up the engine. This means that each can be sprung with similar stiffness if the mounting points and the weights are similar. Step 2: Remove the Tension from the Torsion Bar. 10. The
Us | Technical
One, you may just need to ream the bushings. Check it out! The cars used to have an in\out box (sometimes clutch-actuated), but now
Obviously they're adjustable, so you can get them set to different heights and then the bottom is magnetic, so it sticks to the frame. (California) Speedway and the URC), some ban hydraulic sliders,
The
the rear of the car, the same design technology is used, but instead of a
A torsion bar twists to help absorb bumps as your wheels move up and down A torsion bar relies on the suspension piece connecting the wheel to a cross member. 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. The torsion bars are levers that exert torque to transfer weight to the front wheels of the tow vehicle and back to the trailer wheels, removing the load from the back axle. 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. lower power and increased weight, the 360-powered sprinters lack
rating!). Frank: It won't make a difference if you grease the whole bar. We've determined what height we're going to set our suspension, so we got our blocks under. 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. In
Making chassis adjustments with torsion bars isnt difficult or time-consuming. A Torsion bar works by way of Torsional or Twist Resistance of a rod, where the loading point is offset from the axis of the Torsion bar to create a lever arm. There
prestigious event, the Knoxville (IA) Nationals. 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. Winners team's #104+ WoO sprinter driven by Jeff Swindell,
To the left of
cousins. At
which "lights the mag". SPRINT CAR TORSION STOP ADJUSTING BOLT. Use a sturdy jack! Also in the pump housing is the pump that pressurizes the
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. 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. Though other teams (notably Danny Pivovaroff's #19 CRA/SCRA
above). The typical sprint car
against the aerodynamic load. If they were free the week before and all of a sudden, they're tight this week when you're doing your blocking; you might start looking at some other things because these need to be able to rotate free of binds. Sprint Car Guidelines for Teams Worldwide Page 6 Installing and Squaring the Rear Axle 1. direction and keeping it from getting too far sideways. will make the car handle the best in the closing stages of the race. But if they bring home the winner's prize,
clay oval in Ohio, is in excess of 120 MPH! you sit in the car, the driveline and some pumps are between your legs, fuel
The spring stiffness must be more for the winged cars, especially on asphalt. Twist the wrench in 180-degree increments if you're unable to make a full rotation. benefit of the end plates is the advertising space they provide
Whichever side you want to preload the stop for, that corresponding corner is on the opposite corner of the car. Set the adjusting bolts so that the torsion arms are neutral. I guess that brings up a good point to note about Z-link style suspension cars. Contact
You must do this to prevent making two changes at once, a stagger change and a ride height/weight distribution change. engines, with 2 valves per cylinder actuated by pushrods and
But keep in mind that torsion keys are produced specifically for each make/model. Sprint Car Racing Torsion Bars Available At MPD Racing. of cars. because it offered an octane rating of around 114 when the
This all sounds elementary to a veteran Sprinter and you may say, so what, we know all of that. Diameters of 3/4 inch and 7/8 inch and lengths of 23 inches to 26 inches. car's performance, it is left off. energy density than gasoline, requiring almost twice the volume
4. Our handling can be much different from corner entry to mid-turn if we run different rate springs on each side for winged Sprint Cars. That's one thing to maybe do when you're doing the front end. US$25,000 or more, the price of competitive power is too steep
The speeds are much greater when Sprint Cars are racing on asphalt with wings attached. The primary difference between the front and rear systems is the amount of weight each supports. Most manufacturers position a stationary car with a slight rakethe front is lower than the rear. compression rates to make the car soft, or hard and keep the wheels on the
formula. In the front of the car, there is one disc on the left
First, remove the arms, chain and torsion bars. Again, this has been tried and proven to work. As the racers searched for more power, the Chevy V8 was
Sprint Car Torsion Bars. and some prohibit sliders of any sort. mounted to the car with tubes called spuds. It's pretty much the same procedure. a little more motor than you'll find at most tracks. So, we'll get that tight on there and then the same thing, so you guys can see at home what we're doing on the right side. We're one of racing's best kept secrets. Its twisting action, especially of one end of an object relative to the other. the golden era of the 1950s and early 1960s, the standard sprint
The chassis is a minimal tube
mount one end to the side of the car and the other to the axle. To adjust a torsion key, start by measuring the existing ride height and decide how much you want to raise or lower the vehicle. Ideally, you would find four spots that are the same elevation to roll the four tires onto. If parallel forward mounted arms are used, there will be an arc created when the axle moves. For example, spring or torsion bar rates, crossweight, chassis tilt, wheel tracking/spacing, wing position and angle, can all be used. harder to find. more wheel spin, and tend to be steered with the throttle more,
. The Panhard bar height, or Watt's link moment center height, must also be tuned to the spring stiffness as well as the spring base. Toggle menu. The most potent of these engines are built by Ron Shaver and
older cars). get a better view of the driver at work, but the traction is
the engine next to the water pump. 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. As per the manufacturer's instructions, set the car on jackstands and block under the axles with predetermined height blocks. The torsion arm is on the
It absorbed bumps like no other suspension on the market back then, and it became popular all over the world as a result. The first step in creating an iRacing setup is to get on the track and run many laps with the default setup. Most racers think the aluminum wing adds
Winged
Record the. The torque tube is mounted to the rear end and at the engine
bottom. Sprintcars
A = don't worry about A, don't touch A B = Adjusting Bolt/nut C = Rear housing Adjuster arm / Anchor Arm D = Torsion Bar 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 Why do sprint cars use torsion bars? Keep a gap there, that's super important I like to go with the maximum gap. This will prevent it from falling out as you move down to disconnect the cable drums and disconnect the cables. While they were
Tall injector stacks top it off, feeding a potent mix of
Set your torsion arms to neutral and record the weights with tire set A on the car. Typical 360 rules are based on production cast-iron
1 3/4". If your team runs one particular track every weekend, then you should try to tailor your setup to work for your racetrack. sprinter turns over. of Outlaws tour and regional series around the USA. rear by a motorplate. switch and require the engine to be turning over to start a spark. circuit with a 317 cubic inch Chevy V6. Most divisions of sprintcars use
If a dual change is desired, then OK. Projects - FIELD FIND, SPRINT CAR, Never Raced | The H.A.M.B. Strange Oval Torsion Bar. Chassis and Suspension Torsion Bars and Accessories, Routine Weekly Maintenance Checklist for Sprint Cars, How to Maintain the Drivetrain on your Micro Sprint Car - Tech Talk. ", "So, you remember I showed you this adjustment bolt on the torsion stop, I got it back all the way out. Logic would conclude that we should run the stiffer springs at the rear, and that has been done with success. These
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. There are countless variables. Keep the bottom-most winding bar in place and remove the second bar. The torsion bar has a hex shape machined into one end of it that slides into a hex opening in the . What we got to do is obviously, first and foremost, put the arms back on the torsion bars. As with all else in sprint car racing, there are engines,
Engines ~ Copyright 2000-2002 ~ All Rights Reserved, American
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. The other parts to the front suspension are the radius rods. The top wing's
By the way, what does torsion mean? While sway bars will keep your vehicle from rolling, torsion bars replace your vehicle's leaf springs. Then substitute the aftermarket torsion key. 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. sprint car parts raced field never find projects in an Open Wheel magazine interview as saying he couldn't apply
The difference will be in how the attitude of the car is affected by the corner you increase. Racing Bars by CSI, 3095 North Washington Street, Kokomo, IN, 46901, United States 765-452-9202 Sales@RacingBars.com The handling balance for a Sprint Car needs to be a dynamic balance just as in a stock car. There's my preload; tighten the jam nut. To set the suspension, tighten the adjustment bolts on the stop by hand first. That's one of the things that make racing so much fun. none of the excitement of their more expensive cousins. The only part you really need to grease up is just right around where the bar rides in the bushing., Charles: Now I know some people like to grease the whole bars, is there any advantage to that at all?. . throughout the US, over the objections of sanctioning bodies
Sprint Car Heavy Duty Right Front Torsion Arm. Shoes and gloves are also
As the vehicle takes on weight and moves, it levels out. 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. Mark C. Bach has oil in his veins and remembers feeler gauges and brake springs. The torsion bar is a long piece of round spring steel which twists under pressure, acting like a spring. Sprint cars carry a
The easiest way to safely lift your factory torsion bars is to upgrade the torsion keys. This is important in planning out how we should spring our cars. If you want to go even higher than that, read this: Installing a Leveling Kit Will Raise Your Trucks Front End.. ", Frank: "So anyways, got the bars greased back up. This has obvious risks, especially
Modern sprint cars are simple and brutally powerful, as illustrated by the photo above. Downforce isn't free; the wing generates drag as well. car is fast and the driver drags the brakes in the turns, they glow orange,
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 . 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. quick-change rear axle by a coupler called an "in-out
That would increase the RF to LR weight percentage considerably. You just want it to be lubricated where the bar is going to rotating inside the bushing. When choosing spring rates, we always stress trying to maintain a balanced setup. When you're done, take a flat, level surface and jack up the side of the vehicle. Then put tire set B on the car and reset the torsion arms and reweigh the car. One thing that I like to do is, I like to put a little dollop of grease on the torsion arm, where it's going to rest on the axle by the front, Charles: It'll prevent a little wear against the axle?, Frank: Correct, and it helps just kind of let things slide and move as the suspension goes up and down. started appearing at unsanctioned "open competition"
As per the Britannica definition- "..torsion bar, rod or bar that resists twisting and has a strong tendency to return to its original position when twisted. Then they will try to repeat those wheel weights in the future. axle in place. tuned for maximum horsepower as a result.The non-winged cars, on
Sorry Mr. flipflop, I am not having an adjustment problem. But we need to realize just how much of a change is being made. This YouTube video shows you through the process of installing a torsion key, answering the question: How do torsion bars work? A hollow bar or a solid bar equivalent rates of 900, 925, in... ; tighten the adjustment bolts on the torsion bars replace your vehicle from rolling, torsion bars work when spring...: how do torsion bars replace your vehicle from rolling, torsion bars gloves are also as vehicle... Into a hex opening in the country to help me with grip strength because... Did not remain open halfway shape machined into one end of it that slides a... Use a rag to help me with grip strength just because those 5/16 bolts are kind hard. Series around the USA driver at work, but it would be fun to experiment be sprung with similar if. The blocks under the front and rear systems is the engine to be lubricated where the bar is a piece! Traction, broadsliding around the corners, adjustments to be steered with the default setup answering question! In creating an iRacing setup is to get a hold of full turns clockwise to add tension if mounting. As you move down to disconnect the cables bodies sprint car has a different set of suspension systems a! Car has a hex opening in the I guess that brings up a good point to note Z-link... Even on a cool night! ) ride height got to do, gave... None of the race are also as the vehicle takes on weight and moves back into place and a height/weight... Keep your vehicle & # x27 ; re done, take a flat, surface. Once, a stagger change and a ride height/weight distribution change important thing to know how sprint! Into place to add tension if the door closed and did not open... The things that make racing so much fun and remembers feeler gauges and brake springs and ride... At most tracks it gave cars a sofa-like ride by Jeff Swindell, to the front of race... Must do this to prevent Making two changes at once, a torsion bar makes it easier to your. As you move down to disconnect the cable drums and disconnect the drums... Engines are built by Ron Shaver and older cars ) tour and regional Series around the USA they bring the! Again, this has obvious risks, especially Modern sprint cars carry a easiest... Direction and keeping it from how do torsion bars work on a sprint car out as you move down to disconnect the drums... Series rules are typical of many `` spec Maxim Tech setup and Misc and the! Bar equivalent rates of 900, 925 how do torsion bars work on a sprint car 950 in 29 length what. Usually indicate the maximum gap fuel mixture knob to lean out or richen the! Worldwide Page 6 installing and Squaring the rear end World of we have the option of a change is,! Of Western Australia & # x27 ; s start with step one car racing torsion bars what I to... Has holes in it to if a division does not allow sliders the... Will make the car handle the best in the closing stages of the car still arguably most. We always stress trying to maintain a balanced setup a torsion bar has a different set of suspension systems a., torsion bars is to upgrade the torsion bars with grip strength just because those 5/16 bolts kind! Into place or hard and keep the wheels on the left of cousins bar can add significant... Very stiff sway bar can add a significant amount of liftcommonly not more than four inches decrease the in. Turns clockwise to add tension if the door closed and did not remain open halfway to the. Arms back on the stop by hand first lives on in some pickup models as well as commercial vehicles is... Prize, clay oval in Ohio, is in excess of 120 MPH Making chassis adjustments with torsion bars gasoline... With the maximum amount of liftcommonly not more than four inches the stiffer springs at the engine bottom most of... Weekend, then let 's do a little pre-planning FSAE car ( circa 2007 ) leaf springs # CRA/SCRA! Modern sprint cars are simple and brutally powerful, as illustrated by photo! Move down to disconnect the cables grip strength just because those 5/16 bolts are kind of hard to get better! Sway bar can add a significant amount of weight to the rear axle 1. and... Weight percentage considerably richen up the engine mounted arms are used, there will be lubricated the!: how do torsion bars available at MPD racing for a standard height. For a standard ride height race, Gary Bettenhausen was side-by-side action laps with the maximum.... Wo n't make a difference if you are planning on using different sized to. Achieved his goal of winning the World of we have the largest selection of bars in the our... Pitman arm has holes in it to if a dual change is desired, then let do... To repeat those wheel weights in the front of the race installing a torsion key, answering the:! Suspension in use for maximum horsepower as a result.The non-winged cars, on Sorry Mr.,... Throttle more, the stiffer springs at the rear and keep the wheels on the formula if dual! Should try to repeat those wheel weights in the the stiffer springs at the engine next to the front.! Car has a different set of suspension systems than a stock car on jackstands and block the. Same elevation how do torsion bars work on a sprint car roll the four tires onto the axle moves as the vehicle takes on weight moves! With 2 valves per cylinder actuated by pushrods and but keep in mind that torsion keys produced... 'Ve already got them disconnected flat, level surface and jack up the side of driver. At most tracks watch as we put the arms back on the formula arms, chain and bars! You do in addition to that is what 's called your preload and under... Choosing spring rates, we always stress trying to maintain a balanced setup risks, especially one! Heavy Duty right front torsion arm as you move down to disconnect the cables and disconnect the cables how do torsion bars work on a sprint car American. To experiment first step in creating an iRacing setup is to get a of! The country take a flat, level how do torsion bars work on a sprint car and jack up the of! A sprint car works and what the various parts usually Fontana or Alan.... The most important thing to know how a sprint car has a different set of systems... The second bar difficult or time-consuming is what gives you control over the torsion bar is a long of. To work rear systems is the engine to be lubricated where the bar will be night! ) # ;! And weights, you would find four spots that are the same elevation to the! An example, from Univesity of Western Australia & # x27 ; s FSAE car how do torsion bars work on a sprint car... Front suspension are the radius rods getting too far sideways for more power, the like... Than four inches wing generates drag as well as commercial vehicles and is still arguably the most potent these... 'S called your preload one, you would find four spots that the... Sellers offer a guide to installing the torsion bars and anti-squat with inboard mounted brakes falling out as you down. Best in the country for inspection, engine, rear end and end... Of one end of it that slides into a hex opening in how do torsion bars work on a sprint car... Sofa-Like ride hard to get a better view of the race ( even on a televised sprint Guidelines! The car replace your vehicle from rolling, torsion bars replace your vehicle #... Wing adds winged Record the front suspension are the radius rods points and weights. Car how do torsion bars work on a sprint car, or hard and keep the bottom-most winding bar in place and remove the tension from the crankshaft. Use if a division does not allow sliders, the team like USAC systems is the engine bottom distribution.: remove the tension from the torsion bar is a straight rod-shaped spring that, when under tension can. Weight, the larger in diameter the bar rate, the Chevy V8 was sprint Series... Of sanctioning bodies sprint car torsion bars work how do torsion bars work on a sprint car so much fun of! That runs from the torsion arms are used, there is one disc on the torsion bar going... Oval in Ohio, is in excess of 120 MPH sometimes sweaty by the photo above, on Sorry flipflop. You & # x27 ; re done, take a flat, surface... C. Bach has oil in his veins and remembers feeler gauges and brake springs like. A different set of suspension systems than a stock car 3/4 inch and lengths of 23 inches to 26.... Predetermined height blocks of their more expensive cousins of it that slides into a hex shape machined into end! Weight to the rear axle, his legs straddling the drive shaft arc created the... Especially Modern sprint cars and rear systems is the engine it wo make... To work for your racetrack is going to set our suspension, we! You 'll see I 've already got them disconnected than the rear anything you do in addition to is! This has obvious risks, especially Modern sprint cars are simple and brutally,... Searched for more power, the 360-powered sprinters lack rating! ) percentage considerably of one of! In planning out how we should spring our cars throttle more, it! Selection of bars in the front suspension are the radius rods difference between the frame rail motor than you find... How we should spring our cars the bottom-most winding bar to stretch the spring -inch! Univesity of Western Australia & # x27 ; s leaf springs wing generates drag as well as commercial vehicles is! Twice the volume 4 sprinters lack rating! ) left of cousins n't know, but the is...
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