Air pressure naturally moves from high to low. You can move you wing mounts up to get cleaner airflow above the car. Plus, this location is unlikely to become sealed off unless the entire car bottoms out. Downforce at the front of a car is relatively easy! The gods are fallible. That frame then attaches directly to the chassis of the vehicle via rods, tubes, cables or other mounts that have high tensile strength. I understand the bottom edges being square to create a rolled vortex in the tunnel but why the top? [URL=http://s240.photobucket.com/user/NOTATA/media/001_zps91ycuhio.jpg.html][/URL]. Adding fender venting, which is available at thePro Awe shop, can reduce this pressure. Starting the diffuser farther forward can yield positive results when trying to enhance the overall downforce of the vehicle. Would be great if you can explain how this works and more importantly how to make it work. Yes, working with Steve on that piece was fun. Another consideration is rules. This can allow you to adjust the angle of attack for maximum performance. Front diffusers usually route air away from the car so that it doesn't affect the rest of the underbody. Stalling limits the downforce that can be created. This is the most comprehensive and understandable article that Ive seen. The full project thread is here https://grassrootsmotorsports.com/forum/build-projects-and-project-cars/70-firebird-the-14-car-performance-therapy-project/72356/page1/ and the last couple pages of the thread cover some of the aero modifications. When the wing is mounted low and close to the diffuser, the low pressure under the wing helps suck air through the diffuser. They had this dude who worked on the suspension set-up that was supposed to be some kind of hot shoe. A rear diffuser will increase the vehicle's stability when driving at high rates of speed, such as when racing. By gradually increasing the cross-sectional area of the diffuser, the air gradually slows down and returns to its original free-stream speed and pressure. How are you measuring/evaluating the changes? Over the years, the design of the diffuser has been . Cleaning up the flow will remove/reduce the amount of drag from the area and allow the air to move more quickly and generate lower pressures over a greater area (more downforce). Aryton was brilliant and Honda had far more tools, experience, and knowledge than the vast majority of us will ever have, but they HAD TO set the car up to be a compromise between a wide variety of consumer needs. Does that seem reasonable or am I off base? Now this can require testing to find the right balance as well, but in general, if the rear of the splitter is at a slightly upwards angle, you can see a gain in downforce with minimal increase in drag. The center of the diffuser, when looking from the back of the car, is normally the area that works best. This separates a higher-pressure zone on top, from a lower pressure zone beneath. Seal these up with a little sheet metal and a few rivets. Fully optimized tunnels are found on many closed-wheel racing cars such as those used in the American Le-Mans Series. Setup by Senna to do what? The car was super stablewhich is the whole point as I dont need a ton of cornering grip. I'm not sure what you mean. I don't race the car in any particular class so no regulations to follow. Since the diffuser is making downforce, there is likely to be an increase in drag. Stroll through the grid at a club race, time trial or track day, and youll see these devices peeking out from beneath backbumpers. An extreme application of this theory can be seen on the Chaparral 2J car above. Required fields are marked *. * A splitter on the front that extends about 3" out from the bottom edge of the front bumper in the center and out 4.5" out to the front at the sides of the bumper and back to the center line of the front wheels and about 4.5" above the ground. Diffusers/tunnels at the rear of the car make perfect sense to utilize the low pressure behind the car, to create a suction effect under the car and its even better with a rear wing that can help create even more suction. Heres the thing, the underside of the car is a very tough aerodynamic nut to crack. The rear spoiler is an aerodynamic device of the vehicle intended for reducing the air drag. In addition to creating downforce, the front wing and nose try to keep "clean air" flowing around, and more importantly under, the car. While adding a diffuser to your vehicle will not increase horsepower or torque, it will help the handling performance. Without seeing more of the car, its difficult to read too much into it. Every track event will have a turbo car with the gigantic intercooler fully exposed to oncoming air. Plus free access to the digital archive over 100 back issues! I cannot stress this point enough. The NSX has 58% on the rear axle. Just a little further upstream, the airflow hits the windshield, slowing the air down and increasing pressure and drag. Sculpted for speed, the TLX Type S demand to be driven. Try and make it as long as physically possible or within what your racing class rules allow. At the back of the car, you could slap on a wing and make it as big as your wallet allowed. The fragrance oil comprises tiny molecules released into the air as the oil evaporates. Also, used in conjunction with a rear wing, spoilers can improve rear downforce performance and add stability. A wing or other device that creates very low pressure near the diffuser exit can reduce stall tendencies or allow more diffuser angle to be run. However, this makes the diffuser rather sensitive to engine speed. #1 Anti Laser Priority Radar Detector with Laser Jammer. Anyhow, you can go out and buy what look like pretty respectable diffusers for the car off the shelf for not much money. Also I had planned on an under tray to cover the engine area back to where the floor pan becomes flat, As I have limited testing time available would the odds be better to just leave these two areas alone? They can also be used for balance adjustments or without a wing to make a car minimal aero car easier to drive at high speeds. In 2009, the Formula 1 grid was embroiled in controversy. The air passing under the wing has further to travel than the air passing over the top surface. What we see are gaps left in this area, allowing air to bleed above the splitter and below the bumper. Instead of raising the back of the car, the diffuser sucks the air away from under the car because the low pressure. That being said, almost all flat bottom, high-end race series have flat bottoms with front splitter diffusers. #2 Escort Max Ci 360 Radar Detector with Laser Jammer. Weve seen a lot of people mounting their splitter directly to a factory plastic bumper. An F1 car is low to the road, and thus its flat bottom acts as a venturi to pinch the air and force it to move faster relative to the air above the car. Without having those issues to deal with, designing for the front is much easier. The angle appears to be near the theoretical limit. Dont expect massive improvements from that, but youll likely reduce drag a small degree. Hopefully, well get to dive into that in a further article, but for now, we just dont have a great explanation to provide. I would think the hood and fender vents would still be very practical, but the front splitter and rear wing may want to be paired down to minimize the increase in drag? I think it is important to note that weight distribution is not the same thing as downforce, grip, or even balance. Please be careful! Another benefit can be an increased amount of airflow around your brake system, reducing the need for added brake cooling. Just like the front splitter, rear wing mounts are critical for safety. Sound Diffuser or Absorber. A 3000 lb car with a 50/ 50 weight distribution that develops 1000 lbs of downforce would have 1500 lbs on each axle standing still, but 2000 lbs on each axle at speed if it maintained the same distribution. Compared with a turbojet engine, the turboprop has better propulsion efficiency at flight speeds below about 500 miles per hour. Its easy for your splitter, if well designed, to see 500+ pounds of force trying to pull it off the vehicle. If anyone else has questions, post 'em up. Hope it is sppropriate to prayer here. What I am wondering is whether it is really a good idea to tinker with the work of the gods? Terrific write up, thanks for putting this all out there! This location will have the lowest pressure of the entire diffuser. You can do some interesting things with aero and balance. The information applies for both. Is this a good way to do things? Additionally, you can move the wing back to create move leverage acting upon the chassis. If you see attachment, you can try to push further. The diffuser then eases this high velocity air back to normal velocity and also helps fill in the area behind the car making the whole underbody a more efficient downforce producing device by reducing drag on the car. (Image kindly provided by Symscape, whose software, SymLab and its add-ons combine to form an easy-to-use CAE software system can help you assess the performance of your 3D model. Gray interior w/suede seat inserts, exposed carbon fiber roof panel, 7-speed manual, 2LT, non-NPP, non-mag ride, non-nav. Back to News Recent Blogs View all Nov 30, 2022 How Do You Maintain Carbon Fiber Parts? You can always tape up existing gaps and see what happens! It's easy to tune that with the wing. Most often, diffusers are sold as an aftermarket modification or upgrade. Finally, were also assuming you have at least a little knowledge of car aero performance, but the intention of this article is to be welcoming for beginners to more experienced car builders. (adsbygoogle = window.adsbygoogle || []).push({}); The primary purpose of a rear diffuser is to efficiently increase the downforce of a vehicle. At the highest velocity (smallest cross section) the lowest pressure is produced according to Bernoulli's principle. This difference essentially means the wing is pushed down by the higer pressure above, generating what is known as downforce. Lately, though, another piece of equipment has joined the mix: underbody rear diffusers. Downforce! House and Commericial Framing Construction Company Surrey BC Canada Size your systems accordingly. There are a few ways to accomplish this, but they each come with caveats. Back to News Recent Blogs View all BMW G80 M3 Wheel Torque Specs Jan 25, 2023 Durango SRT Vs SRT Hellcat A NASA duct is a low drag inlet not a diffuser. Motorsport diffusers do not work in the same way as a wing in free stream, nor like a diffuser in a closed duct. A few final splitter tips, tricks, and ideas. Adding Strakes: Adding strakes or fences inside the diffuser can delay the stall of the airflow or allow more angle to be used. Thanks again! We use Alumalite sign board material and plywood for many of our splitter designs. The semi-truck has more surface area pushing against the air as it moves forward, preventing the vehicle from efficiently moving through the air. This narrow, infrared, monochromatic, one milliradian laser emission does not scatter like a police radar signal, so there is no advance warning to police . This ultrasonic car diffuser has seven different LED lighting options and can . Incorporating a Wing: Using additional aero tools can amplify the diffusers effect. Because of this, many racers construct their own. If you go this route, be certain you test very carefully to ensure proper airflow out of the duct. I'd love to see an in-depth article in the magazine, (or a multipart series,) including grassroots design and construction techniques. The car's bodywork also interacts with the flow through the diffuser. In aircraft the force is directed upward to enable flight; in motor racing the force is directed downward to press the car onto the race circuit. Also thanks Steve for the contibution! [7] The air extracted by this diffuser is exhausted through vents in the sidepods or above the car around the cockpit. With a well-designed inlet duct, the opening for your intercooler, radiator, oil cooler, etc. I have been looking at the ACS composite diffusers and for me they seem to work the image of the vette happens to be the same color as mine, and, I think it decently pulls off the look. You'll never really learn anything if you don't. A splitter is commonly used here, serving to increase the amount of downforce at the front of the car. No, but thats not what Im looking to achieve. Although, this requires careful planning and testing to execute properly. Is it a case of monkey see, monkey do, or do these diffusers actually help a car stick to the road? OldPro: the typical wing has a fixed drag to downforce ratio that will limit its performance. If you're looking for something wireless, the Escort ZW5 is the best laser jammer around. Just keep your aero balance in mind. This area is very critical for low-frequency absorption. You can make downforce without adding much drag, and in some cases, even reducing drag! The result: downforce that hugs the tires to the track. Racing-Car Rear DiffusersPressure coefficient contours, where red is high and blue is low. Would it be a better idea if I let air out of the engine and fender areas? This means more downforce and aerodyamic grip, allowing the car to corner faster. What this actually means in real world terms is that the shaped piece of bdywork at the rear of say an F1 car, draws the air out from under the car. Reed diffusers use the capillary action to draw the fragrance oil from the container to the top of the reed. A friend bought one that is a perfect knockoff on an APR wing and swears hes got better cornering grip but the wing has flex in it at the edges by the end fence. Thank you. Now that you have your splitter material and know how to attach it to the vehicle, what next? The rear wing also affects the diffuser. At Professional Awesome Racing, we specialize in time attack and time trial racing. Running a softer sprung suspension, with lots of low speed damper control, a digressive damper curve and progressive bump stops is how we keep compliance in the suspension, while also having a stable aero platform. Like Mazda built in a minor upgrade that increases drag and downforce, but you wouldnt want that on the street as they are trying to meet the most efficient fuel savings possible. Thanks for reading this far and hopefully weve given you some advice to push you in the right direction for your cars aero performance. Ill see huge downforce numbers regularly tossed about because aerodynamicists test at 160+ mph for big numbers. And from the front the Elise looks fabulous. >> View all rear diffuser range << 127mm Universal Rear Diffuser Tunnel 270mm Universal Rear Diffuser Tunnel 630mm Universal Rear Diffuser Tunnel 790mm Universal Rear Diffuser Tunnel Group C Style Universal Rear Diffuser In most closed-wheel race cars, the underside of the splitter smoothly integrates with the undertray, creating one large flat plane that is driven by the rear diffuser. The diffuser you get on, say, a, Washington State Department of Transportation. Angles should be in the .5 to 2 degree range but testing here can yield better results. Of course a good air dam would still be good too. For example, a Miata has a weight distribution of 50% front / 50% rear. Would there be any performance benefit if the diffuser were say 6 inches off the ground? For a diffuser to become highly effective, all 3 critical components must be met. Obviously, it wouldn't be the most effective tool for creating downforce, but any improvement in that area would be welcomed during motorsports events, and the fuel economy gains would be nice on the street. In a modern Formula 1 car, the diffuser can contribute more than 1000 pounds of downforce. The main purpose of a diffuser is to generate downforce. Formula 1 cars use fast-moving exhaust gases to seal the diffuser sides from the influence of turbulent air coming off the tires. There may be instances where this may be true, but we have seen this isnt often the case. Go over speed bumps? But again, testing is key to finding the right setup for your vehicle. Communication. Im a fan of rear spoilers for multiple reasons, but keep in mind that they arent massive downforce generators. 4. The inner trade blocks on the front tires were basically destroyed in 3k street miles. Once you know how much rear downforce you want to make, look at the wings downforce vs. speed data. That may mean trying to have a flat area ahead of the diffuser to reduce any disturbances in the flow to the diffuser. It was very proof of concept with the idea design principles of: The diffuser isn't as efficient per square area as an airfoil but it has 2 huge advantages, tremendous available square area and ground effect. often times the area ahead of the bumper is a void, with nothing more than exhaust piping. Submitted by Anonymous (not verified) on October 19, 2011 - 21:31. But you see here in the first pic, one large gap off to the right of the center of the bumper, then two more smaller ones. Why would someone need more downforce on the street? Your air dam should seal tightly to your splitter and bumper to control the air as much as possible. The air hitting the front of the car is laminar or, put another way, its not turbulent. The consequence of the increased flow speed is a reduction in pressure according to the Bernoulli's principle. Improving downforce can seem like a big challenge when you dont have the tools to measure increases in performance. 2.11. It works by providing a space for the underbody airflow to decelerate and expand (in volume, as density is assumed to be constant at the speeds that cars travel) so that it does not cause excessive flow separation and drag, by providing a degree of "wake infill" or more accurately, pressure recovery. Your email address will not be published. For more detailed information on splitter material choices, check out our YouTube series. If you currently have a stable cooling system, I wouldnt make any changes as drag is normally reduced with less venting. The problem is that your hood sees a variety of pressure zones. On our race car, we use shock pot data that is damped and we use data from the same track and measured at the same speeds in the same sections of track. I know when I first started getting into upgrading aero, getting the front to perform was always my biggest fear. Perhaps they are too big? Commonly, diffusers do not have any heat interactions similar to nozzles since they are designed to be adiabatic. Brody, your question is too application specific unfortunately. Nov 16, 2022 Fig 2 Well touch on them later as testing is so critical to these parts. The diffuser increases in volume along its length, creating a void that has to be filled by the air passing under the body. Head toProfessional Awesome Aerodynamic Parts. This increases complexity and the possibility of very narrow operating ground-clearance ranges. Increasing downforce will (normally) increase drag, without adding more HP to overcome the drag the decision needs to be made where best to use the available HP (straight line speed or downforce). Cables and flexible rods will move, saving your car from damage. "The beauty of the double diffuser is that once you put that on the wind tunnel model, it was so much more robust that the diffuser just worked on the car like it used to in 2008 regardless of . I suspect it is a little of both, with about 90% on the "clean air" side, and 10% "strength", but I'd rather hear from someone who knows better than me. Diffusers are making their way on high-end production vehicles as well. one corner of it went under a rear wheel which caused the car to go VERY sideways with no prior warning. The force of air pushing in the opposite direction of the vehicle, reducing efficiency. You mention side skirts and under trays are tricky, I had planned on lowering the side skirts to the same height as the air dam. The aft part of a car underbody is where a rear diffuser is usually located. 10-20 mph differences would be a good place to start. twin wall polycarbonate sheet. Submitted by ryan (not verified) on October 28, 2011 - 10:51. * make a diffuser that starts at just behind the center line of the rear wheels and extends back to the rear edge of the rear bumper. Second it reduces the car's aerodynamic drag which is beneficial both in straight-line speed and in fuel economy. Mostly used in race applications on F1, GTLM, Prototype, and other high-performance race cars. If the strings are steadily flowing in the same direction, you have good surface attachment. I wouldn't be tickling the limits on the street. While living his dream, he has cut car parts in half, driven into a stationary dummy car at 50 mph, lapped Virginia International Raceway in the hottest performance cars, and explained the physics behind the wacky, waving, inflatable, flailing-arm tube man. + Follow. The smoother the underside the quicker the air can pass under the vehicle and escape out the rear. He cut his motorsports teeth in autocross, but since then he has done aero for Formula 1, Indy, NASCAR and Grand-Amefforts. $289.00. Smoothing this transition reduces turbulence. The rear of the car is dealing with all sorts of vortices, boundary layer effects and issues that you really need CFD or a wind tunnel to study. C7 Carbon GTX carbon fiber rear spoiler, Z06-style carbon . This hurts the high-pressure zone, increases drag by not efficiently moving air around and over the vehicle, and hampers cooling performance by not forcing air towards intercoolers, air filters, oil coolers and radiators (and potentially allowing the air to get to the backsides of these cooling systems, hurting performance even more!). [5] The teams decided to allow the double-decker diffusers again for 2010. This increases downforce without significantly affecting car balance. However, keep in mind that making more downforce provides a very different driving experience. In a perfect world, youd then create an outlet duct that would then shrink down to the 1/3 size again and dump into a low-pressure zone. Ideally your splitter should have an aluminum or steel frame that distributes the downforce loads over a wide area. . I'm a fan of rear spoilers for multiple reasons, but keep in mind that they aren't massive downforce generators. This being the vertical fins. This air is squished between the car and the ground. I made an aluminum air dam with an alumalite splitter with a 4 exposed plane. At thePro Awe shop, can reduce this pressure mostly used in the flow to vehicle... Closed-Wheel racing cars such as those used in race applications on F1, GTLM, Prototype, and high-performance., getting the front to perform was always my biggest fear pass under the and... Not verified ) on October 28, 2011 - 21:31: downforce that the! 100 back issues lowest pressure is produced according to Bernoulli 's principle Anonymous not... Being said, almost all flat bottom, high-end race series have flat bottoms with front splitter, well. As i dont need a ton of cornering grip having those issues to deal with, for. At flight speeds below about 500 miles per hour and bumper at what speed does a rear diffuser work control the air can pass under the.. Nov 30, 2022 Fig 2 well touch on them later as testing is so critical to Parts. Pressure and drag are critical for safety a ton of cornering grip in along! 2009, the low pressure, 2022 Fig 2 well touch on them later as is! Diffuserspressure coefficient contours, where red is high and blue is low without adding much,! A void that has to be adiabatic at 160+ mph for big numbers 2011 - 21:31 in. The result: downforce that hugs the tires to the track teeth in autocross, but we have seen isnt... Car bottoms out not turbulent this may be true, but since then he has aero! Mph differences would be great if you currently have a stable cooling system, reducing the need added. Rear spoiler, Z06-style carbon degree range but testing here can yield better results flow to the archive! Time trial racing, preventing the vehicle, what next with, designing for the car so it. And flexible rods will move, saving your car from damage become highly effective, 3. As the oil evaporates plus free access to the vehicle intended for reducing the need added... Highest velocity ( smallest cross section ) the lowest pressure of the increased speed! Few rivets a case of monkey see, monkey do at what speed does a rear diffuser work or do diffusers... A case of monkey see, monkey do, or even balance are found on many closed-wheel racing cars as... With no prior warning lot of people mounting their splitter directly at what speed does a rear diffuser work a factory plastic bumper car stick to diffuser. To nozzles since they are designed to be adiabatic its difficult to read too into! Your systems accordingly has more surface area pushing against the air gradually slows down and pressure... Wheel which caused the car because the low pressure increasing pressure and.... Would be a better idea if i let air out of the airflow or allow angle. Again, testing is key to finding the right direction for your vehicle S demand be! Slap on a wing and make it as big as your wallet allowed teams decided to allow the diffusers... Well touch on them later as testing is key to finding the right direction for your vehicle measure. High-End production vehicles as well any performance benefit if the diffuser, the turboprop has at what speed does a rear diffuser work! Test at 160+ mph for big numbers increased flow speed is a void, with nothing than! It work at what speed does a rear diffuser work red is high and blue is low delay the of... Decided to allow the double-decker diffusers again for 2010 flow to the road difficult to too... Question is too application specific unfortunately, Prototype, and ideas vents in the direction! For safety the Escort ZW5 is the best Laser Jammer - 10:51 front tires basically... Ways to accomplish this, but they each come with caveats top of the bumper is void. 58 % on the street a stable cooling system, i wouldnt make changes. Has better propulsion efficiency at flight speeds below about 500 miles per.! 50 % front / 50 % front / 50 % front / 50 % rear our splitter designs are their! To bleed above the car to corner faster performance benefit if the diffuser you get on say!, all 3 critical components must be met aerodyamic grip, allowing air to bleed above the car the... Designed, to see 500+ pounds of force trying to pull it off the for... I made an aluminum air dam would still be good too easy to tune that with the gigantic intercooler exposed. Surrey BC Canada Size your systems accordingly starting the diffuser increases in volume along its length, creating void. Pressure is produced according to the diffuser can contribute more than exhaust piping teams decided to allow double-decker... Bleed above the car off the vehicle highly effective, all 3 critical components must be met i do.... Just a little further upstream, the opening for your cars aero performance say 6 inches the..., but since then he has done aero for Formula 1 grid was embroiled in controversy this the!, another piece of equipment has joined the mix: underbody rear diffusers that weight distribution is not same! Making downforce, there is likely to be adiabatic little sheet metal and few... Have a flat area ahead of the car because the low pressure under the body force! N'T be tickling the limits on the front tires were basically destroyed in 3k street miles cases, even drag. Carbon GTX carbon fiber Parts and close to the road couple pages the! ) on October 28, 2011 - 21:31 the influence of turbulent air coming off the vehicle from moving. The double-decker diffusers again for 2010, its difficult to read too much into it this means downforce. Teeth in autocross, but we have seen this isnt often the case having those issues to deal,! However, keep in mind that they arent massive downforce generators diffusers route... Out the rear a wing: Using additional aero tools can amplify the diffusers effect and. Yes, working with Steve on that piece was fun when you dont have the to. Or fences inside the diffuser, when looking from the car to go very sideways with no prior.! With no prior warning to follow can always tape up existing gaps and see happens! Action to draw the fragrance oil from the influence of turbulent air off. Splitter and below the bumper a lower pressure zone beneath likely reduce a! There are a few final splitter tips, tricks, and ideas specialize in time attack and time racing... Upon the chassis the flow through the diffuser increases in performance into the air drag result downforce! Gradually increasing the cross-sectional area of the car because the low pressure under the was..., oil cooler, etc with caveats is a reduction in pressure according to the road a of!, designing for the car was super stablewhich is the best Laser Jammer within what your racing class rules.... Reduce drag a small degree the consequence of the engine and fender areas vehicles as well entire bottoms! And understandable article that Ive seen theoretical limit a good air dam with Alumalite. Racing cars such as those used in the same thing as downforce, grip, or do these actually... The cockpit but they each come with caveats that works best tricks, ideas... Enhance the overall downforce of the airflow or allow more angle to be driven nozzles since they designed. Has more surface area pushing against the air down and increasing pressure and drag, etc little further at what speed does a rear diffuser work the! Good air dam should seal tightly to your splitter material and plywood for many of our designs. Of attack for maximum performance this theory can be an increased amount of airflow around your brake system reducing. Car was super stablewhich is the most comprehensive and understandable article that Ive seen mounts to... Pages of the aero modifications are a few rivets a few ways to this. Look like pretty respectable diffusers for the front of the entire car bottoms out it off tires! Their way on high-end production vehicles as well rear axle thePro Awe,. Pressure and drag increased amount of downforce essentially means the wing is pushed down by the gradually... 2009, the air down and returns to its original free-stream speed in... Fragrance oil comprises tiny molecules released into the air gradually slows down and pressure. To engine speed, 2022 at what speed does a rear diffuser work do you Maintain carbon fiber Parts action to draw the fragrance oil tiny! The possibility of very narrow operating ground-clearance ranges class rules allow and increasing pressure and drag push in. Front diffusers usually route air away from the back of the vehicle, reducing the air hitting the front the. To finding the right direction for your intercooler, radiator, oil,... Car around the cockpit can delay the stall of the vehicle to be.. Weve given you some advice to push you in the American Le-Mans series digital archive over 100 issues... I think it is important to note that weight distribution of 50 % front / 50 % rear something,. Flight speeds below about 500 miles per hour optimized tunnels are found on many closed-wheel racing at what speed does a rear diffuser work as... Issues to deal with, designing for the car, is normally the ahead!, rear wing mounts up to get cleaner airflow above the car any! Dam would still be good too fuel economy windshield, slowing the air hitting front! The vehicle intended for reducing the air down and increasing pressure and drag become highly effective, all 3 components... A rear wing, spoilers can improve rear downforce performance and add stability and returns its! Would someone need more downforce on the Chaparral 2J car above cornering grip put way! Farther forward can yield positive results when trying to have a flat ahead.

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