![]() ![]() style duct with a long neck to get it out of the dirty air and to allow air to pass beneath it without excess compression. So, the most effective intake would be an E.T. The problem is you create a cushion of air beneath the duct which gets compressed and causes drag if there isn't enough space for the air to go. It's why high-wing aircraft land shorter than low wing aircraft. That is the minimum height above a lower plane to ensure good clean air into the engine compartment. Take the chord of a plane (wing), multiply by 1.5. What you do see are intakes that are created based upon the following formula (roughly descibed because I don't have the exact formula handy) But if you take a look at the rear/mid-engined LeMans cars, for example, you won't see intakes just above the roof (unless they are for inducting cool air into the cabin). ![]() Personally, I would avoid most style bars as they serve no purpose other than style.Click to expand.Well, take a look at vehicles, of any type, that are designed for function without regard for appearance or marketing considerations and show me a similar scoop on any vehicle, whether train, boat, car, airplane, helicopter, covered wagon, or rickshaw which is designed for speeds below 200mph. Lastly, if the impact forces are high enough that any bar could bend far enough to trap you in the car, a bent "style bar" may be the least of your concerns. ![]() Third, there have been very few, if any, credible reports of actual mousetrapping, even with style bars ( I am sure someone will dig up an exception). Windshields do bend back, but the handful of posts on forums such as this one with rollover pictures of convertibles like Spyders and Miatas show the windshield frames typically do very well as a "roll bar" It has no diagonal bracing (other than the glass itself), and no bracing, just the frame. Second, any rollover also has the same potential with the windshield bending back over the driver. While it comes up a lot, a little research shows a couple facts.įirst, rollovers on the street are very rare. Posts on this topic will inevitably bring up "mousetrapping", which is a concept that an unbraced bar can move forward and trap the passengers in the seats like a mousetrap. It works fine with the soft top and stock storage bins. I didn't add it for rollover protection, but for more bracing. But the mounting is very sturdy, unlike a lot of style bars that have no bracing at all. ![]() I have an Autopower rollbar that is structural and added a lot of stiffness and is well built, but they call it a "style bar", probably for legal reasons as it doesn't have any diagonal braces and isn't approved for racing. A roll bar is designed to enhance structural integrity and add safety in a rollover. At least that bar is approved through SCCA, so you can use it should you ever decide one day to attend an auto-x or HPDE event.Īre you looking for a "style bar" or a "roll bar"? A style bar looks like it might do something in a roll over, but probably won't, at at least nothing good. The Techno Pro-Spirits bar will not protect you during an impact or roll over.īuy the Hard Dog bar if you want a rollbar. There are no extra bars to support the main hoop, nor is there any triangulation in the design. Rollcages work by displacing the load of the impact through the many supporting bars that make up the cage, they are also reinforced through triangulating the design. I've defended many Japanese bolt in rollcages in the past, but I will not, and cannot defend the Techno Pro-Spirits roll bar. These are the same dudes (Japanese people in general) who think it's a great idea to go wheel to wheel racing with their "fuel cell" being a lawn mower fuel tank (just the bare tank, no bladder or impact protective box) relocated to where the passenger seat would be, with the battery (no box, just a bare battery with a tie down mounted to it by drilling some holes in the floor pan) relocated right next to it. Unless it's a pro race (I'm talking about ones that go by FIA regulations, and not JAF), there are damn near zero regulations governing car modifications on Japanese race tracks. Click to expand.That doesn't mean a thing. ![]()
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