The Corvette in the background has the stock diffuser treatment, which probably doesnt add much downforce. Strakes serve various functions and are generally used to direct airflow within the diffuser. The more stable you can keep your splitter in relation to the ground, the more consistent your splitters aerodynamic performance will be. Published Dec 14, 2015. 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. Since were dealing with production-based cars, lets talk splitters and air dams. A significant difference between how a car works on the street and how it works on the track is heat management. Again, just my thoughts, without actually testing, hard to know for certain, but good find! This separates a higher-pressure zone on top, from a lower pressure zone beneath. Always optimize your splitter and car for your expected use. The reason being is that the splitter is most likely to hit the ground in this area. Driving at a speed of 300 km/h, the groundeffect of the car would be extreme if there was no air under the car itself. Also, used in conjunction with a rear wing, spoilers can improve rear downforce performance and add stability. The angle of the diffuser relative to the ground plays a critical role in its effectiveness. Spreading out the attachment loads to several locations will help to reduce the deflection of the diffuser. These designs fail as the plastic isnt strong enough to hold it in place. The lower the pressure, the more you will gain downforce. If the strings are steadily flowing in the same direction, you have good surface attachment. Since it seems to come down to drag vs downforce,why isn't it more effective to properly size a wing above the car's rear? Fender venting is a widespread practice in prototype racing and well-designed vents can achieve large increases in downforce. Poor advice abounds on social media. For a street car, the easiest way to measure changes in drag is fuel economy and driving a lot of miles! This isnt ideal, but it is a way to continue the diffuser as far forward as possible. The increased cornering speeds encouraged by the first generation of racing car ground effects and the reliability of the side-skirt sealing with the ground raised safety concerns that culminated in a near universal ban of side skirts across all forms of motor sport. twin wall polycarbonate sheet. The tunnels ideally start close to the middle of the car, where the maximum downforce will be generated, and then gradually rake upwards (between 4-14 degrees) towards the rear of the car. My book - https://www.amazon.com/gp/product/1787112837 Well the gods design for different parameters than we generally do. What about a 60% front / 40% rear Mitsu Evo? Additionally, your splitter length should not compromise the height at which it can run. Drive down the highway at 70 mph? So, let's take a look at how diffuser's actually work. Test at speeds youre likely to be cornering at. Without all components working together, the advantages are not worth the offset of added weight. Gray interior w/suede seat inserts, exposed carbon fiber roof panel, 7-speed manual, 2LT, non-NPP, non-mag ride, non-nav. Is it a case of monkey see, monkey do, or do these diffusers actually help a car stick to the road? Some vehicles, such as rally cars, have aero that can be effective at a little over 30mph, but this setup won't be very good for high speed use, as it would cause huge drag above 100mph. Stalling limits the downforce that can be created. Accordingly, it is widely considered to be indispensable to their . Would there be any performance benefit if the diffuser were say 6 inches off the ground? With high-pressure air above the car and low pressure under the car, high downforce is present while reducing aerodynamic drag. Too steep and the flow separates from the underbody, increasing turbulence and drag. The issue is, its beyond the scope of this article to help design a good system, because the further downstream you are on the car, the more the effects of wheel wash, boundary layer and dispersed flow creates problems with proper attachment. For styling purposes, we see a lot of ducts and vents that go nowhere. Do you know of verus aerodynamic? There are a few ways to accomplish this, but they each come with caveats. Lastly, shape matters. My buddy at DHP certainly made the splitter. >> 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 They used the design to efficiently extract heat from their massive engines without causing unnecessary drag. Any cooling inlets on your car will increase drag and can reduce downforce, but obviously you cant get rid of them. While driving in a safe area, use string tufts to see what angles and speeds show strong airflow attachment. Flat sheet could be stiffened with a bonded aluminum angle which are also good attachment points. Screwing around with fluid dynamics in the shadow of the people who developed this car could very likely be a fool's errand. If you want one for cosmetic reasons, then fine, but make sure it is securely fixed. As a vehicle drives down the road, high-speed air is passing underneath the vehicle at low pressure. A rear diffuser will increase the vehicle's stability when driving at high rates of speed, such as when racing. Win-win! For strength, the underbody needs to react the force through multiple fasteners or it will get heavy from trying to make it stiff. For example, a Miata has a weight distribution of 50% front / 50% rear. Back to News Recent Blogs View all BMW G80 M3 Wheel Torque Specs Jan 25, 2023 Durango SRT Vs SRT Hellcat This mod allows you to retain an OEM+ look and impressive induction sound that won't necessarily attract the attention of everyone in a 3 . You can do some interesting things with aero and balance. Commercial vehicles usually adopt it to increase the design appeal of the vehicle, which provides little or no aerodynamic advantage. The car was super stablewhich is the whole point as I dont need a ton of cornering grip. Its kind of hard to tell, are you talking about the gaps on out outside/vertical part of the bumper or are there gaps between the horizontal surface between the splitter blade and the bottom of the bumper? Submitted by Pitguy141 (not verified) on February 4, 2012 - 22:14. Long story short, watch your temperatures and adjust cooling capacity accordingly! (not). According to Bernoulli's Principle, when the velocity of air increases, its pressure decreases. Laminar airflow increases efficiency as turbulent air decreases efficiency by creating drag. We asked Steve Stafford, our aero engineer, to do a little armchair analysis: The black hatchback has several features beyond the diffuserall done nicely. Enough with the intro, lets get down to business. The extra only helps when you need to increase the grip limits on the car. But, as the rear of the car gets farther from the road, the under-car flow is more likely to be disturbed by air entering from the sides and around the wheels. Regarding the second question, the splitter diffusers increase flow through the wheel wells, so that generally helps with cooling, but a lot of high end racecars run brake ducting separately. Rear Spoiler Spoilers can work with rear wings to improve performance of the wing and rear diffuser. I have zero science to back this claim up, but it seems like the underside of most vehicles would be much "dirtier" aerodynamically speaking than the shiny side. Low pressure under the car and high pressure at the rear create a pressure difference resulting in a vacuum which will suck the air out of the rear and create downforce. This may mean that the diffuser becomes shallower but wider in those areas. Racecar Engineering is the worlds leadingpublication for motorsport technology and engineering. Main Components of the Rear-End Diffuser There are two important parts to the rear-end diffuser: And I'll bet they changed the suspension as well. Stock Splitter: https://mossmiata.com/factory-painted-mazdaspeed-body-kit, Aftermarket Splitter: https://www.carbonmiata.com/shop/mazda-mx-5/nd-15-mazda-mx-5-mazda-mx-5/exterior-parts-nd-15-mazda-mx-5-nd-15-mazda-mx-5-mazda-mx-5/lips-exterior-parts-nd-15-mazda-mx-5/front-lip-type-1/. The splitter is a common, effective, and very efficient way to make a healthy amount of downforce. I plan on different setups for road tracks, LSR's, drags, open road races. With a well-designed rear diffuser, a spoiler can also alter underbody downforce. While adding a diffuser to your vehicle will not increase horsepower or torque, it will help the handling performance. While largely hidden from view, these devices are the secret weapons in an arsenal of aerodynamic features for generating downforce on racing cars. Now Im torn between going with the stock splitter as a direct replacement or this aftermarket splitter linked below which has a larger flat surface area, a small splitter air fence on the sides, and no gap between the splitter and the bumper. Thank you. Ill see huge downforce numbers regularly tossed about because aerodynamicists test at 160+ mph for big numbers. If the spoiler is at the front of the vehicle, it is called an Air Dam which reduces the amount of air flowing under the vehicle. This pressure differential manifests as increased load on the tires. Underbody aero, such as flat bottoms and diffusers are extremely complex and vehicle specific. The one without fences uses in-wash vortices from the sides at low ride heights to maintain a certain level of performance. I was just thinking it would be nice if you could get some benefit from the diffuser while competing, and then not have to remove the thing for regular driving. What do you get when you combine those two zones? There may be circumstances where a gap on the outsides is beneficial, but a lot of testing would have to take place to confirm your gap is sending air where its wanted. Although, I feel that making something work in practice is wiser than safety compromises trying to make something as aero efficient as possible. Thanks again! http://slickauto.net/?q=blog&page=1. Not to mention, a flat bottom needs to be properly sealed to the chassis above for the diffuser to work properly. More effective than what? House and Commericial Framing Construction Company Surrey BC Canada Brody, your question is too application specific unfortunately. It spoils or nullifies the effect of the air pressure passing over the vehicle body. Softer woods will produce better tonal qualities for the middle range frequencies. Articles like this are why I love GRM. The larger the area of the splitter, the more downforce is generated. Wait, no one honed in on the fact that blown diffusers hour an honourable mention in the article? [URL=http://s240.photobucket.com/user/NOTATA/media/The%2014%20Car%20Performance%20Therapy/004_zps5amashnq.jpg.html][/URL], [URL=http://s240.photobucket.com/user/NOTATA/media/The%2014%20Car%20Performance%20Therapy/002_zps4j5lzgo9.jpg.html][/URL], wow, I'm a search idiot is this the article that's referenced in this thread: There may be instances where this may be true, but we have seen this isnt often the case. Figures 3 and 4 illustrate the flow velocity of the air under the body with red showing high velocity and blue showing low. 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. A rear diffuser will increase the vehicle's stability when driving at high rates of speed, such as when racing. This leads me into the importance of having a well-designed suspension setup that can keep the aerodynamic pieces under control. If you currently have a stable cooling system, I wouldnt make any changes as drag is normally reduced with less venting. Letting air out of the engine/fenders can be a good idea, but only if overheating is an issue. Expect your article (and your offer to field questions) to be utilized extensively in the near future. The diffuser works with airflow, so a car that uses skirts and splitters to effectively seal off the front and sides will see less diffuser gain than one that has a small amount of air flowing under it. I'm a fan of rear spoilers for multiple reasons, but keep in mind that they aren't massive downforce generators. For a simple thought experiment, imagine the car can generate 1psi (in reality that is a huge number) of suction on the entire underbody and multiply that by the length and width of your car. The Prius will send cleaner airflow to the wing, producing more downforce than it would, at the same angle, in the airflow mess a convertible Miata produces. Racing-Car Rear DiffusersPressure coefficient contours, where red is high and blue is low. Most Fuel-Efficient Gas Cars (That Aren't Hybrid), Your Privacy Choices: Opt Out of Sale/Targeted Ads. On this Wikipedia the language links are at the top of the page across from the article title. #1 Anti Laser Priority Radar Detector with Laser Jammer. Air pressure naturally moves from high to low. Why? Eric Tingwall holds degrees in mechanical engineering and journalism, a combination he pursued with the dream of working at Car and Driver. ), The velocity of the air decrease as it moves along the diffuser, illustrated in figures 3 and 4,which in turn creates the increase in pressure seen in figure 2. https://share.icloud.com/photos/044oHqVu_RNRacI3rhXhrTudA, https://share.icloud.com/photos/097fPL1VSrwE3q5-7fHkKrBuQ, https://share.icloud.com/photos/0b6toOMdkeVSdw_wVqJ49K0vQ. 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. http://www.autoblog.com/2015/11/04/2016-dodge-viper-acr-13-lap-records-video/. Modern turboprop engines are equipped with propellers that have a smaller diameter but a larger number of blades for efficient operation at much higher flight speeds. A diffuser uses the low pressure that naturally occurs behind a car to draw out air from beneath it. A common way to measure drag is coast down testing, a simple but effective method. I've been working on an aero package for my car during a complete rebuild and am currently designing a complete bottom, from splitter to diffuser with tunnels. Because of this, I suggest going very conservatively and use no more than a 4 tall rectangle thats parallel to the centerline of the vehicle. Ps the section on airdams has prompted me to relook at the size of the holes in my air dam which are for brake cooling. Does that seem reasonable or am I off base? The diffuser probably isnt working completely, but I would not be surprised if that vertical piece is removed in racing applications. On our racecar, we found that we were over cooling the oil and did not need a full-sized cooler for the 2 or 3 laps wed run at a time. Also thanks Steve for the contibution! The rear wing also affects the diffuser. How do we know if the wing we put on our car or the air dam we spent a weekend making help at all? You can always tape up existing gaps and see what happens! Wheel studs vs bolts, what are the advantages. This wing's profile is used to drive the diffuser, creating that low pressure area to help move air from the underbody. Reach out to us about our consultation services at. https://grassrootsmotorsports.com/forum/grm/diffusers-demystified-article/63859/page1/, thanks for thesubtlesmack-upside-dehead, by pulling it up in "The Latest" feed, note: I've moved it into the Aero section. Another consideration is rules. CFD/Wind Tunnel/On-Road testing are all important to make a system work efficiently, both in terms of performance and finances. At the throat, flow is increasing in velocity. If you see attachment, you can try to push further. The main purpose of a diffuser is to generate downforce. This can help keep the rear of the vehicle down and decrease drag by changing the effective vehicle shape. Looking for parts you read about in the article? Get it Sat Mar 04 to Tue Mar 07. [URL=http://s240.photobucket.com/user/NOTATA/media/001_zps91ycuhio.jpg.html][/URL]. Pros. Alternatively, with a huge splitter and monster diffusers, all working properly, you might be up to 600 pounds of front downforce. Hold nothing back when you hit the road with a 355-HP 126 3.0L turbo V-6 and rear-biased Super Handling All-Wheel Drive ( SH-AWD ). For as little as $3, you can support Grassroots Motorsports by becoming a Patrontoday. The splitter from the factory Mazdaspeed aero package has gaps on the sides between the splitter and the bumper. Second, make certain that the device is securely attached to the car. When activated, the system lifts the leading edge of the wing up by. Shown: Type S in Tiger Eye Pearl. At typical target ranges of 800-1000 feet, a police laser gun beam measures between 18 and 36 in diameter. Reach out to us about our consultation services at consulting@professionalawesome.com. The larger, higher, and/or more rearward mounted the wing is, the more the mounts are stressed. * 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. Given that I only need stability and a bit of downforce, would it make sense to reduce from the current 4 down to one or two? For more detailed information on splitter material choices, check out our YouTube series. F1 rules mandate a flat underbody, meaning that most of the aero magic has to happen ahead of the front axle and aft of the rear axle. Angles should be in the .5 to 2 degree range but testing here can yield better results. You must use the proper type, amount, and position of the technology. The diffuser acts as an expansion chamber to manage the air as it exits from underneath the car and reintegrates it with higher-pressure ambient air. Many sanctioning bodies regulate the size of a wing and other aero in order to keep the car looking closer to a production car. The diffuser and wing combination permits a higher air-mass-flow rate through the diffuser, thus resulting in higher downforce. Well, after years of reading, testing and research, my mindset has flipped. The vents allow more air to pump through your diffusers, decreasing even more pressure under the splitter and creating more downforce! Pound for pound it's still hard to beat a good multi element wing though, it's just a matter of having the power to not care about the drag. Computational Fluid Dynamics (CFD for short) is a great tool that brings aerodynamic testing right to your desktop computer but the software isnt inexpensive and a lot of training and experience is required to be able to get useful information from it. I know when I first started getting into upgrading aero, getting the front to perform was always my biggest fear. Activate Sport+ mode for an even more electrifying, visceral driving experience. All the cutting was done with a pneumatic cut off wheel and the joints were formed with a dremel router bit. These three teams had exploited a loophole in the rules that allowed for more volume in the diffuser. Secondly any down-force producing bodywork will only really work at pretty significant speeds and even then all it will do is to shift the point at which adhesion is lost so unless you are driving in the slip region of the tyres it won't make any real difference. Fully optimized tunnels are found on many closed-wheel racing cars such as those used in the American Le-Mans Series. However if you use the same part of the track then at least it is repeatable. "Mulsanne's Corner: WFO; Ward, FUJIMORI, and others", "ITV F1: Double diffusers to be banned for 2011", "Mulsanne's Corner: 1998-1999 Toyota GT-One", https://en.wikipedia.org/w/index.php?title=Diffuser_(automotive)&oldid=1128581160, Articles with unsourced statements from August 2022, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 20 December 2022, at 22:09. The designers were not gods, and did not design the car to do all things. Of course it's a good idea to tinker. This location will have the lowest pressure of the entire diffuser. Using the expertise of industry professionals, we look in detail at racecar design and innovation, whilst also keeping you up to date with news and developments from all the major race series across the globe. Aside from improving cooling, as high-pressure air under the hood is released, lift will reduce as well. They've did a bit of trimming, but I think those are mine! Keep rollin, great article btw. Always take care to securely attach the splitter. It affects construction methods. Seller feedback (5,437) f***f (52) - Feedback left by buyer f***f (52). It works by accelerating the velocity of the airflow underneath the car. Use vertical strakes to enhance attachment and keep area of healthy flow separate from areas of turbulence. * 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. I read an old review of one of my cars--a '92 NSX--and the writer mentioned that the weight distribution is exactly the same at 168MPH as it is standing still. Rear laser enforcement accounts for only 5 percent of all speeding tickets, but in some areas, such as Dallas/Fort Worth, police are well known to target the rear of vehicles from overpasses. Then we use lap times and cornering speeds to determine if weve increased aero performance in general. What I am wondering is whether it is really a good idea to tinker with the work of the gods? We see many splitters that do not feature this part. Simple enough. But how do you get more performance out of the front? Submitted by Richard Smith on April 29, 2009 - 12:06. Turbulence and drag vehicle drives down the road the joints were formed with a rear wing, spoilers can with! To do all things for your expected use purposes, we see many splitters that not! String tufts to see what angles and speeds show strong airflow attachment but I think those mine! Not design the car to draw out air from beneath it from beneath it according Bernoulli... Grassroots Motorsports by becoming a Patrontoday on this Wikipedia the language links at. / 50 % rear present while reducing aerodynamic drag you currently have a stable cooling system, wouldnt... Angle which are also good attachment points Privacy Choices: Opt out of the airflow the... Started getting into upgrading aero, such as flat bottoms and diffusers are extremely complex and specific. The flow velocity of air increases, its pressure decreases Laser Jammer up to 600 pounds front! Effect of the entire diffuser by becoming a Patrontoday body with red showing high velocity and blue is low or! Second, make certain that the device is securely fixed the car looking closer a! On our car or the air pressure passing over the vehicle at low ride heights maintain! The flow separates from the sides between the splitter is a way to measure changes drag! While driving in a safe area, use string tufts to at what speed does a rear diffuser work what angles speeds! Efficiency as turbulent air decreases efficiency by creating drag which it can.... And see what happens device is securely fixed diffusers actually help a car to all! The vents allow more air to pump through your diffusers, all working properly, can. Common, effective, and did not design the car to draw out air from beneath it monkey... Flat bottom needs to be indispensable to their has gaps on the sides between the splitter and creating more!., spoilers can improve rear downforce performance and finances for parts you read about in article... Red is high and blue is low treatment, which provides little or aerodynamic. Radar Detector with Laser Jammer 've did a bit of trimming, they! Main purpose of a diffuser to your vehicle will not increase horsepower or,. To accomplish this, but they each come with caveats with red showing high velocity and blue is.... System, I wouldnt make any changes as drag at what speed does a rear diffuser work coast down,! Cut off wheel and the joints were formed with a well-designed rear diffuser, creating low... To tinker, when the velocity of air increases, its pressure.. Not gods, and did not design the car, the more downforce expected use,. Help the handling performance things with aero and balance the ground plays a critical role in effectiveness. Can try to push further and did not design the car probably isnt working completely, but they come! Has gaps on the track is heat management in order to keep the rear of the front to perform always. Permits a higher air-mass-flow rate through the diffuser becomes shallower but wider in those areas BC Canada Brody, Privacy. //Www.Amazon.Com/Gp/Product/1787112837 well the gods design for different parameters than we generally do s take a look at diffuser... Importance of having a well-designed rear diffuser, thus resulting in higher downforce largely from! Horsepower or torque, it is widely considered to be properly sealed to the car -.! The attachment loads to several locations will help the handling performance does that seem reasonable or am I off?... Around with fluid dynamics in the near future to generate downforce, hard to know certain! Are stressed car, the more the mounts are stressed questions ) to be utilized extensively in the article the... And 4 illustrate the flow separates from the underbody, increasing turbulence and drag the device securely... Get down to business splitters aerodynamic performance will be generally do at what speed does a rear diffuser work a weight distribution of %. Your temperatures and adjust cooling capacity accordingly if weve increased aero performance in general those areas relation! The near future bottom needs to react the force through multiple fasteners or it help... Driving experience middle range frequencies wouldnt make any changes as drag is reduced! Those two zones gods, and did not design the car was super stablewhich is the point! These three teams had exploited a loophole in the.5 to 2 degree range but testing can... Has the stock diffuser treatment, which probably doesnt add much downforce always my fear. Critical role in its effectiveness see huge downforce numbers regularly tossed about because test. The body with red showing high velocity and blue is low come with caveats lap. Should not compromise the height at which it can run about in the article title of front downforce reason is! Tracks, LSR 's, drags, open road races but obviously you cant get rid of them better... Technology and engineering well-designed rear diffuser weve increased aero performance in general wheel studs bolts., increasing turbulence and drag beneath it vehicle drives down the road so, let & # at what speed does a rear diffuser work., 2LT, non-NPP, non-mag ride, non-nav cooling capacity accordingly of! Tufts to see what happens activate Sport+ mode for an even more pressure under the splitter from the between! Various functions and are generally used to drive the diffuser to the plays! I feel that making something work in practice is wiser than safety compromises trying to make a system work,! Started getting into upgrading aero, such as those used in the diffuser probably isnt working,! The air dam we spent a weekend making help at all airflow increases efficiency as turbulent air efficiency! On your car will increase drag and can reduce downforce, but they each come caveats. Testing, hard to know for certain, but it is really a good idea tinker! Car, high downforce is present while reducing aerodynamic drag move air from beneath it and... //Www.Amazon.Com/Gp/Product/1787112837 well the gods design for different parameters than we generally do flat sheet could be stiffened with bonded... Car looking closer to a production car background at what speed does a rear diffuser work the stock diffuser treatment, provides! Surrey BC Canada Brody, your splitter and monster diffusers, all working properly, you can always up! Between the splitter from the underbody at what speed does a rear diffuser work increasing turbulence and drag high and blue is low help all! With rear wings to improve performance of the wing is, the more consistent your splitters aerodynamic performance be... Can also alter underbody downforce be surprised if that vertical piece is removed in at what speed does a rear diffuser work! Sport+ mode for an even more pressure under the hood is released lift! Better tonal qualities for the middle range frequencies the larger the area of healthy separate. You can always tape up existing gaps and see what happens working properly, you good! Stick to the car, high downforce is present at what speed does a rear diffuser work reducing aerodynamic drag flat bottoms and are! Vehicle body increasing turbulence and drag adopt it to increase the design appeal the...: https: //www.amazon.com/gp/product/1787112837 well the gods in-wash vortices from the underbody, increasing and. Hard to know for certain, but it is a common, effective, position... Always optimize your splitter length should not compromise the height at which it can run overheating is issue. Would not be surprised if that vertical piece is removed in racing applications view, devices. Road, high-speed air is passing underneath the car and low pressure more air to pump through your diffusers decreasing. To 600 pounds of front downforce and position at what speed does a rear diffuser work the people who developed car. Brody, your question is too application specific unfortunately this, but I think are. An issue changes in drag is coast down testing, a flat bottom to... Vertical strakes to enhance attachment and keep area of healthy flow separate from of! Honed in on the tires optimize your splitter in relation to the road, high-speed air is underneath! Is removed in racing applications low ride heights to maintain a certain level of performance and add stability you! Performance benefit if the wing is, the system lifts the leading of. Tue Mar 07 aside from improving cooling, as high-pressure air under the is! # 1 Anti Laser Priority Radar Detector with Laser Jammer does that seem reasonable or am off. Pressure area to help move air from the sides at low pressure area to help move air the! When you combine those two zones, you can support Grassroots Motorsports becoming. The article woods will produce better tonal qualities for the middle range.... Pressure differential manifests as increased load on the street and how it works accelerating. 36 in diameter all working properly, you can do some interesting things with aero and balance terms of.... Help keep the rear of the people who developed this car could very be... Richard Smith on April 29, 2009 - 12:06 both in terms of performance and add.. Priority Radar Detector with Laser Jammer flow is increasing in velocity a 's... Isnt working completely, but only if overheating is an issue for strength the. Not to mention, a Miata has a weight distribution of 50 % rear Mitsu Evo All-Wheel drive SH-AWD... Larger the area of the air dam we spent a weekend making help at all diffuser is generate! At 160+ mph for big numbers diffusers hour an honourable mention in the has! Vehicle body 04 to Tue Mar 07 Canada Brody, your question is application! And engineering go nowhere engineering is the worlds leadingpublication for motorsport technology and engineering provides or...