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After facing many challenges with utilization of this forum for many years, the board voted on the evening of 1/12/2026 to stop use of the forum in favor of the modern, more effective means.

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What does this mean for the old forum? Well, in short we are going to stop using it. This has been reviewed several times in the past few years, and there has been a desire for some of more tenured members of the club to have the historic content preserved. In an effort to preserve this content, it was discovered that we could not simply export the content to be placed in a modern website. This forum will now become an archive only forum and will not be monitored. If you wish to preserve any of the content, this is your time to search the pages to find it. There is no promise that this content will remain available forever with the fragile nature of this forum.
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aerodynamics

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  • #1

    aerodynamics

    Carbon Weezel - 100% carbon fibre parts for automotive and marine applications
    http://www.carbonweezel.co.uk/testing_mini.html
    We make very lightweight 100% carbon fibre parts for classic road and race minis.
    John Kilgore...if winning was easy, losers would do it.
    Team9Racing BMW 325i, Old Faithful (with a little evil)
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  • #2
    Very cool John.

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    • #3
      So out of those, it seems a splitter is the most beneficial/easiest to accomplish? Can we as ALSCCA all chip in and purchase a windtunnel for vehicle development?!
      Nick Stone

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      • #4
        Originally posted by seducksauce View Post
        So out of those, it seems a splitter is the most beneficial/easiest to accomplish? Can we as ALSCCA all chip in and purchase a windtunnel for vehicle development?!
        The closing in of the grille space to only feed air to the radiator is also very important. 20lbs of lift may not seem like much, but that's not good.

        I'm curious to see what would happen if they spaced the back of the hood up a bit right before the windshield, see if any of that smoke comes out there or if it still goes out the bottom.
        M. Cholewa

        Because they heard I liked my name, so they put my name as my name so I could have my name in my name... all the time.

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        • #5
          Originally posted by Cholewa View Post
          The closing in of the grille space to only feed air to the radiator is also very important. 20lbs of lift may not seem like much, but that's not good.

          I'm curious to see what would happen if they spaced the back of the hood up a bit right before the windshield, see if any of that smoke comes out there or if it still goes out the bottom.
          I think they did have the back of the hood open. They said that the "old racers trick" of opening up the back of the hood actually causes the air to go backwards instead of escaping out towards the windsheild.
          John Kilgore...if winning was easy, losers would do it.
          Team9Racing BMW 325i, Old Faithful (with a little evil)

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          • #6
            Originally posted by kilgojr View Post
            I think they did have the back of the hood open. They said that the "old racers trick" of opening up the back of the hood actually causes the air to go backwards instead of escaping out towards the windsheild.
            Exactly. That introduces turbulence and creates a high pressure area. Good for aero (assuming the hood rake is enough to matter) but nothing special for cooling. Of course, it is possible to use the louver theory to make this a low pressure area, but the rake on the glass is the key to all this, and it's generally not a possibility.

            The biggest thing I've learned about fluid dynamics in terms of cooling is that so many people think of getting the air to something, but not so much about getting it out the other side. Having a clean exhaust for the air without turbulence or interference from other factors is key.

            For "downforce," my preference is always to reduce lift first, then add downforce. Downforce adds drag, and so does lift. So, eliminating lift reduces drag and helps keep the car on the road. Basically, do everything you can to stop the air from pushing the car upward before adding things to push it downward.
            Matt W.
            18 SM - Lancer Evolution MR
            15 MR - Volkswagen Beetle
            Sponsors: Satellite Racing - Defined Performance

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            • #7
              This thread is making me happy.
              Nick Stone

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