{"product_id":"verus-engineering-slanted-hood-louver-kit-aluminum-2013-2021-scion-fr-s-subaru-brz-toyota-86-u7asf5","title":"Verus Engineering Slanted Hood Louver Kit Aluminum - 2013-2021 Scion FR-S \/ Subaru BRZ \/ Toyota 86","description":"This new vent kit includes slant cut vents.   Reduce under hood pressure and temps with this clean, OEM-esque add on while retaining the OEM's hood rigidity by not cutting into the structural sheet metal below.  Having a modular design allows the end user to pick from a multitude of configurations, from maximum evacuation using the wickers, to a cleaner look without, and an optional rain guard kit that collects water to dump it forward of the engine's critical components.  Available in a satin black powder coat or raw for those that want to color match.  These have been tested and proven to greatly reduce multiple areas in the engine bay.\r\n\r\n\u003cstrong\u003eOptional Rain Guards Available:\u003c\/strong\u003e  See \u003ca href=\"#related\"\u003e\"related\"\u003c\/a\u003e items below.\r\n\u003cp\u003eThis new vent kit includes slant cut vents.  Velox set out with goals to reduce engine bay heat and pressure with a lightweight and affordable hood louver kit.  By using the OEM hood with purposefully placed, built, and tested louvers weight is kept lower than most carbon vented hoods.  Their  louver kit retains the hood's structural rigidity to ensure the hood retains it shape after years of service.  With the optional rain guard kit, collect and dump water on the radiator\/shroud\/fans and keep it from dumping water on the rest of the engine bay.\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cstrong\u003eOptional Rain Guards Available:\u003c\/strong\u003e  See \u003ca href=\"#related\"\u003e\"related\"\u003c\/a\u003e items below.\u003c\/p\u003e\r\n\r\n\u003ch4\u003eConstruction\u003c\/h4\u003e\r\n\r\n\u003cul\u003e\n\u003cli\u003eCNC laser cut out of 0.040 thick 5052 Aluminum\u003c\/li\u003e\r\n\u003cli\u003eStainless steel flush clinch studs\u003c\/li\u003e\r\n\u003cli\u003eStainless serrated nuts reduces tendency of backing off\u003c\/li\u003e\r\n\u003cli\u003eWickers automatically included in each kit\u003c\/li\u003e\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003eFeatures\u003c\/h4\u003e\r\n\u003cul\u003e\n\u003cli\u003eOffered in satin black powder coat or raw\u003c\/li\u003e\r\n\u003cli\u003eRetain OEM hood's structural integrity\u003c\/li\u003e\r\n\u003cli\u003eOptional rain guards\u003c\/li\u003e\r\n\u003cli\u003eReduce under hood pressure and temperature\u003c\/li\u003e\r\n\u003cli\u003eClinch studs\/nuts allow vents to be removed for cleaning, removal and install of rain guards and wickers depending on needs.\u003c\/li\u003e\n\u003c\/ul\u003e\r\n\r\n\u003chr\u003e\r\n\r\n\u003cdiv class=\"container\"\u003e\r\n    \u003cdiv class=\"leftColumn\"\u003e\r\n\t\t\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--ubFguH5d--\/f_auto\/v1\/content\/pnc55ba8dwp1x3tp4ae6\"\u003e\r\n\t\u003c\/div\u003e\r\n    \u003cdiv class=\"rightColumn\"\u003e\r\n\t\t\u003ch4\u003ePurpose\u003c\/h4\u003e\r\n\r\n\u003cp\u003eThis document contains information and notes regarding the construction, features, and testing on the hood louver kit for the ZN6 chassis, including the FR-S, BRZ, and GT86 cars.\u003c\/p\u003e\r\n\t\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"clear\"\u003e\u003c\/div\u003e\r\n\r\n\u003chr\u003e\r\n\r\n\u003ch4\u003eDesign\u003c\/h4\u003e\r\n\r\n\u003cp\u003ePlacement for the vents was a combination of multiple factors.  We used CFD to pick placement on the hood based off low pressure.  We avoided the structural sheet metal below the skin of the hood, retaining hood rigidity.  Final decision clarifying our choice in location is that it is above the exhaust, one of the hottest components in the engine bay, and right behind the radiator, which aids in extracting that hot air.  See below for photos clarifying these points.\u003c\/p\u003e\r\n\r\n\u003cdiv class=\"container\"\u003e\r\n    \u003cdiv class=\"leftColumn\"\u003e\r\n                \u003cp\u003eFig. 1: Iso Surface on front half of vehicle, highlighting areas of low pressure.\u003c\/p\u003e\r\n\t\t\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--RjZymII6--\/f_auto\/v1\/content\/momptrs2duwb1aycuxoo\"\u003e\r\n            \r\n\t\u003c\/div\u003e\r\n    \u003cdiv class=\"rightColumn\"\u003e\r\n                \u003cp\u003eFig. 2: Pressure plot, the lighter green\/teal color representing the lowest pressure on the hood.\u003c\/p\u003e\r\n\t\t\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--DyZUvyFi--\/f_auto\/v1\/content\/pewbbujq7vpbjjgqsloq\"\u003e\r\n\r\n\t\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"clear\"\u003e\u003c\/div\u003e\r\n\r\n\u003chr\u003e\r\n\r\n\r\n\u003cdiv class=\"container\"\u003e\r\n    \u003cdiv class=\"leftColumn\"\u003e\r\n                \u003cp\u003eThe hood louvers feature a modular design, allowing the end user to pick from multiple configurations.  There are quick removal rain guards for those that want to protect the engine bay from water by collecting and dumping the water further forward, onto the radiator.  The wickers are also an optional installed piece.  The wickers greatly increase evacuation of engine bay temps.\u003c\/p\u003e\r\n \r\n\u003cp\u003eWe chose to use 0.040 thick aluminum for its weight, ability to conform to the hood, and for available coating processes.  The wickers are also bent aluminum, designed to be just tall enough to make full use of the vents while keeping drag at a minimum.  We found the minimal height for the wickers through tuft testing.\u003c\/p\u003e\r\n            \r\n\t\u003c\/div\u003e\r\n    \u003cdiv class=\"rightColumn\"\u003e\r\n                \u003cp\u003eFig. 3: Under hood view showing structural sheet metal in-tact.\u003c\/p\u003e\r\n\t\t\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--e2BSWlv9--\/f_auto\/v1\/content\/ew9knvalzjcou9ghejwg\"\u003e\r\n\r\n\t\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"clear\"\u003e\u003c\/div\u003e\r\n\r\n\r\n\u003chr\u003e\r\n\r\n\r\n\u003cdiv class=\"container\"\u003e\r\n    \u003cdiv class=\"leftColumn\"\u003e\r\n               \u003cdiv class=\"video-container\"\u003e\r\n\r\n               \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/ZRsbvvJrC5Y\" frameborder=\"0\" width=\"560\" height=\"315\"\u003e\u003c\/iframe\u003e \r\n            \r\n\t\u003c\/div\u003e\r\n\r\n\u003c\/div\u003e\r\n\r\n    \u003cdiv class=\"rightColumn\"\u003e\r\n                \r\n                         \u003ch4\u003eVideo Data\u003c\/h4\u003e\r\n\u003cp\u003eUsing tuft testing we were able to visualize the flow and effectiveness of the louvers at low and high speeds.  This is how and why we were able to optimize the height of the wickers.\u003c\/p\u003e\r\n                 \r\n\t\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"clear\"\u003e\u003c\/div\u003e\r\n\r\n\u003chr\u003e\r\n\r\n\u003ch4\u003eThermocouple Data\u003c\/h4\u003e\r\n\r\n\u003cp\u003eUsing thermocouples and data logging, we were able to test two conditions with the OEM hood and then with the louvered hood.  The two tests were a heat soaked idle condition and race simulated condition.  We tested multiple locations through the engine bay, the passenger side coils, the driver side coils, under the intake manifold, and at the air box above the radiator.  Tests were conducted as soon as possible between the two scenarios, ambient temperatures between tests were negligible (87-90 deg. F).\u003c\/p\u003e\r\n\r\n\u003chr\u003e\r\n\r\n\r\n\u003cdiv class=\"container\"\u003e\r\n    \u003cdiv class=\"leftColumn\"\u003e\r\n                \u003cp\u003eFig. 4: Passenger side coil thermocouple taped in place.\u003c\/p\u003e\r\n\t\t\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--c1bc_rj5--\/f_auto\/v1\/content\/ttomyros4ttwtkt240qr\"\u003e\r\n            \r\n\t\u003c\/div\u003e\r\n    \u003cdiv class=\"rightColumn\"\u003e\r\n                \u003cp\u003eFig. 5: Driver side coil thermocouple taped in place.\u003c\/p\u003e\r\n\t\t\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--3N0R8jt0--\/f_auto\/v1\/content\/y9ztzec6bcvwtf1xg4ov\"\u003e\r\n\r\n\t\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"clear\"\u003e\u003c\/div\u003e\r\n\r\n\u003chr\u003e\r\n\r\n\r\n\u003cdiv class=\"container\"\u003e\r\n    \u003cdiv class=\"leftColumn\"\u003e\r\n                \u003cp\u003eFig. 6: Air box thermocouple taped into place.\u003c\/p\u003e\r\n\t\t\u003cp\u003e\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--2JkLSQCa--\/f_auto\/v1\/content\/c2p5s6rbrydqsmiqx0sc\"\u003e\u003c\/p\u003e\r\n            \r\n\t\u003c\/div\u003e\r\n    \u003cdiv class=\"rightColumn\"\u003e\r\n                \u003cp\u003eFig. 7: Intake manifold thermocouple placement.\u003c\/p\u003e\r\n\t\t\u003cp\u003e\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--3N0R8jt0--\/f_auto\/v1\/content\/y9ztzec6bcvwtf1xg4ov\"\u003e\u003c\/p\u003e\r\n\r\n\t\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"clear\"\u003e\u003c\/div\u003e\r\n\r\n\u003ch4\u003eIdle Test\u003c\/h4\u003e\r\n\r\n\u003cp\u003eThe idle test was time consuming but simple.  From a cold start, we started the vehicle and let temperatures equalize at idle.  This took roughly 45 minutes to an hour.  We then took the highest temperature with the radiator fans on and the radiator fans off, as they cycled, as that affected readings considerably.  If we had to open the hood, we would let the temperatures equalize under hood yet again, which took approximately 20 minutes.  The results are below.\u003c\/p\u003e\r\n\r\n\u003cp\u003eFig. 8: Idle test data.\u003c\/p\u003e\r\n\r\n\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--cdWPd6dG--\/f_auto\/v1\/content\/d6jkeayvinyik91d3ddk\"\u003e\r\n \r\n\u003ch4\u003eRace Simulation\u003c\/h4\u003e\r\n\r\n\u003cp\u003eDue to time and funds, we were unable to test these on the track.  However, we came up with a simulation that was held constant between tests to accurately depict how these perform at speed under load.  We found a one mile spot of road that has little traffic and a nice pull off.  We then would accelerate to 60 MPH quickly, staying in 2nd gear.  This is very near redline in 2ndgear, then applied the same amount of clicks on the e-brake to induce a load.  For those good at math, that is over a minute, high RPM, moderate load condition.  We did this two times, and then took measurements for each test.  The results are below.\u003c\/p\u003e\r\n \r\n\r\n\u003cp\u003eFig. 9: Race simulation test data.\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cimg src=\"https:\/\/images.jbautosports.com\/image\/upload\/s--O_KzTZRX--\/f_auto\/v1\/content\/bmdrxsambtdqcruuqalt\"\u003e\u003c\/p\u003e\r\n \r\n\u003ch4\u003eConclusion\u003c\/h4\u003e\r\n\r\n\u003cp\u003eWe have heard from multiple track day enthusiasts that they are killing the ignition coils.  These malfunctioning coils are thought to be caused by overheating.  It appears that these hood vents dramatically reduce under hood temps and the air around the ignition coils as well.\u003c\/p\u003e\r\n \r\n\u003cp\u003eThese louvers will also reduce pressure build up in the engine bay, also known as hood flutter.  The side benefit would be a slight increase in front end downforce, something we cannot simulate in CFD currently, nor do we think it major enough to make a large note of it.\u003c\/p\u003e\r\n \r\n\u003cp\u003eIt is highly recommended to use wickers to increase evacuation.  Rain guards will dramatically reduce effectiveness of the louvers.\u003c\/p\u003e","brand":"Verus Engineering","offers":[{"title":"Default Title","offer_id":45712596303958,"sku":"VERA0065A-BARE","price":65.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/0411\/1190\/files\/sd9iyem5q5c5_3ed1013b-4d23-4563-914f-cb5a6c03aa54.jpg?v=1788783014","url":"https:\/\/truegearus.com\/products\/verus-engineering-slanted-hood-louver-kit-aluminum-2013-2021-scion-fr-s-subaru-brz-toyota-86-u7asf5","provider":"TrueGear","version":"1.0","type":"link"}