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Guys
I said I would work on a solution for our open window buffeting problem and I have come up with a simple low cost solution. I had some scrap 1/16" plastic that I used to test my theory before making a final product. I tested it today at 150mph and it worked perfectly. The first photo is my mach up which shows up well in the photo and last photo is the black finished product. I made a pattern from a piece of computer paper as shown. With the bends in the factory door piece you need to bend the paper around all sides and mark it. One pattern will be good for both sides, just remember you have a left and right so you need to make sure the textured side of the plastic is facing out. I taped the pattern to the plastic and cut the plastic with sheet metal shears. Clean up the edges so they are dead straight with a sanding block. Now it's time to make the first bend. Start with the top bend first. I used a heat gun to heat the edge of the plastic and then formed the roll with a 1/4" piece of wood dowel. The piece should now fit over the relieved edge on the factory piece and be flush with the window sill at the bottom. I now used a 7/16" piece of wood dowel to form the back deflector side in the same manner as I formed the top bend. Check your fit, it is easy to make adjustments with the heat gun. When the piece fits as you like it put on double back tape to the piece and stick it in place. Thats it. You can remove it at anytime without hurting the factory window piece. Do not use foam backed double stick tape as it is too thick.
Last edited by SmokinGTS; 03-17-2015 at 12:43 AM.
Reason: added clarification
If you have 2.00 in this project I would be surprised. It works great, Yeah I would have liked to have had an injection molded piece to replace the factory piece but a $10,000 mold is out of the question. This is the next best solution with virtually no out of pocket expense.
All of the above look like effective solutions. One non-obvious thing is that you need to place a deflector on one (1) side only. That is enough of a spoiler to prevent the airstream from filling the low pressure area (the interior) until it becomes the high pressure area and dumps the air out, which is what makes the "thrumming".
Which ever solution you acquire or make, try one before installing two. My bent plastic solution lays over the triangle and is held securely in place by the door when it is closed. It goes on the passenger side when I want to drive with the windows down.
Ed, I'm holding out hope you can make some for us (you don't even need to cover mine just paint them black).....the buffeting at the track is driving me to drink! I am told the other co that makes them is out of stock....and besides you're starting to become my go to source for everything GT3 and figuring by the end of the year you'll have your own GT3 tools and accessories shop of all your creations!
I chopped up an aero wiper blade and stuck it to the same section on my last car that had high speed buffeting issues. Worked like a charm. I may do the same if Ed doesn't do something slick for us here.
Chuck
I have not tried just one but it is worth the effort. Ok guys I will do this tomorrow and report back. As I have found it doesn't take much to eliminate the problem. I need to find a way to mass produce these cheaply.....
03-16-2015, 08:03 PM
Wind Deflector/ Buffeting Problem
