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Thread: Front Bumper Wind Splitter - DIY

  1. #1
    Member 68Cadillac's Avatar
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    Front Bumper Wind Splitter - DIY

    For an upcoming HPDE I decided to revive my dream to make and fit a proper front wind splitter.

    Sourced a sheet of 10mm Alumalite. Actually Econolite because I only needed one side with paint the underside could be raw aluminum. Saved a bit of coin by buying a damaged sheet. One corner was mangled, but well away from the area I needed. This stuff is stiff and surprisingly lightweight for how stiff it is.


    Based the shape on my old HDPE splitter and a second splitter. There's the final shape after cutting against the wall.


    Finalizing the placement of one of the seven mounting points. The bar stock for the mount is 6 mm thick. 38 mm wide.


    3/32" 133-strand (7 x 19) Galvanized Steel Wire Rope for the three front mounting points. Breaking strength: 450 kg per wire. So together the three wires could lift up my car before they reached their breaking strength rating. I'm sure it'd just rip out the front bumper beam if it ever got near 1350 kg. But the wire wouldn't fail. Why wire? To allow a bit of upward flex in case of a nose scrape while on (off?) track.


    Air dam to help the splitter build up high pressure right on top of it. Leading edge of the splitter sticks out 110mm from the bumper. I varied that 110 a bit for ascetics in certain areas.


    Goes back 1.2 meters from the leading edge. Took a video to see if the wires needed to be tightened up but at 60 mph or so they straightened right out as the pressure differential increased.


    Those are my foot prints. Did the "can you stand on it?" test. Hope it can it handle the pressure generated at HPDE speed.
    Hp 375 - LbFt 525 - Tons 3 - Doors 2 - Length 19' - Ash Trays 4 - LSD 1 - Seats 6 - Trunk space 4 (bodies)
    Rasmus

  2. #2
    Member 68Cadillac's Avatar
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    Re: Front Bumper Wind Splitter - DIY

    Still more work.


    But here's how it looks, this evening


    Further back.

    Driving impressions:

    < 55mph or so the engine just sounds different. No butt dyno noticeable effects.

    55 - 65 mph. Felt like the cars was gettin sucked down to the asphalt the way a house vacuum smooth floor attachment feels on tile when on the grout lines. Kind of stuck to it.

    70 - 95 mph. Feels planted. Like a big shop vacuum with the same attachment on as above on smooth marble floor. Effort need to move the wand.

    100 -105 mph. Felt stuck to the road. Like a magnet to the top of the fridge.
    Hp 375 - LbFt 525 - Tons 3 - Doors 2 - Length 19' - Ash Trays 4 - LSD 1 - Seats 6 - Trunk space 4 (bodies)
    Rasmus

  3. #3
    Master Member Flat 4 Ninja DFMhellboy's Avatar
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    Re: Front Bumper Wind Splitter - DIY

    Is there cable contact where I hi lighted?


  4. #4
    Member 68Cadillac's Avatar
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    Re: Front Bumper Wind Splitter - DIY

    No. There's a little slack in them. Press down on on the splitter about 5 mm and they straighten right out. Didn't intend that.
    Hp 375 - LbFt 525 - Tons 3 - Doors 2 - Length 19' - Ash Trays 4 - LSD 1 - Seats 6 - Trunk space 4 (bodies)
    Rasmus

  5. #5
    Administrator Flat 4 Ninja
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    Re: Front Bumper Wind Splitter - DIY

    Real slick setup Rasmus. I need to do that for the GC.
    98' GC (carcass)
    03' WRX wagon (busted up)
    06' STI (unicorn in hiding)

  6. #6
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    Re: Front Bumper Wind Splitter - DIY

    Well done man! That looks great

    Sent from my SGH-T999 using Tapatalk 2

  7. #7
    Fort Member Ervin's Avatar
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    Front Bumper Wind Splitter - DIY

    Looks awesome and it looks like it does its intended task. Good job
    FIGHTING FOR PEACE IS LIKE FUCKING FOR VIRGINITY!!!!!

  8. #8
    Member 68Cadillac's Avatar
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    Re: Front Bumper Wind Splitter - DIY

    Thanks fellas.


    Here's how the three front wire stays look from the side.


    When I apply ~10 kg of force the wire slack disappears.
    Hp 375 - LbFt 525 - Tons 3 - Doors 2 - Length 19' - Ash Trays 4 - LSD 1 - Seats 6 - Trunk space 4 (bodies)
    Rasmus

  9. #9
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    Re: Front Bumper Wind Splitter - DIY

    bravo /golf clap

  10. #10
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    Re: Front Bumper Wind Splitter - DIY

    Quote Originally Posted by 68Cadillac View Post

    When I apply ~10 kg of force the wire slack disappears.
    god it turns me on when kg, m, bar,km,etc

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