Fog lamp brake ducts
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This is a discussion on Fog lamp brake ducts within the Suspension and Handling forums, part of the Tutorials & DIY category; If one is tracking his car occasionally, you'll find that heat in the brakes is a problem. This mod will ...

  1. #1
    Moderating on the run! Big Sky WRX's Avatar
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    Fog lamp brake ducts

    If one is tracking his car occasionally, you'll find that heat in the brakes is a problem. This mod will help w/ additional air flow onto the rotor area while retaining the use of the fog lamps when not needing the air flow.

    A couple of notes- I first attempted last year to setup the ducting so it was routed dirrectly to the center of the rotors- this is the most effective way to cool the brakes. Unfortunately I ran into a couple of problems- first the passenger side proved to be very difficult to route the ducting due to the manifold being in the way. Second I secured the ducting end along the tie rod and then attached it to the speed sensor bolt. I was never satisfied w/ this setup and came up w/ another one- this one's easier, albeit not as effective. The reason I used high temp 2" ducting was to help w/ my original setup- I also had to use a reducer on the duct itself -from 3" to 2".

    This new setup you can use the lower temp stuff and in 3" making things easier and cheaper.

    Let's get started- first the fog lamps need to be removed- three phillips head screws- don't try to remove the one that looks different- it's for adjusting the lamp. Next pull the plug on the lamps- now you can remove the fog lamp.

    Should look like this:
    Attached Thumbnails Attached Thumbnails frontfog.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    Next you'll need to access behind the fender splash guard- a few little plastic fasteners. I did this up on my ramps to to ease access. Once you have access you'll see the fog lamp holder just slides out (held in w/ three tabs). You'll have to affix your duct to this plate- takes some cutting/sanding to get it just right- I don't have pics of this as I did this last year. I used an epoxy and bent of the sheet metal in a few spots to keep the ducy attached.

    Here's a few pics of the plate w/ the duct attached: side view (you can see the reducer as well) :
    Attached Thumbnails Attached Thumbnails sideduct.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    A front view
    Attached Thumbnails Attached Thumbnails frontduct.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    top view w/ hole- I use a plastic grommet- this is where the fog lamp plug goes in:
    Attached Thumbnails Attached Thumbnails topduct.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    Installed from the fender well:
    Attached Thumbnails Attached Thumbnails ductattached.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    Here's the actually ducting w/ plastic ends (ends sourced from hardware store):
    Attached Thumbnails Attached Thumbnails hoseends.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    Close up of end- I cut an angle into them to insure clearance of the tires and help direct air:
    Attached Thumbnails Attached Thumbnails hoseendclose.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    You'll need to cut a 2" (or 3" inch or whatever you use) hole in the fneder splashguard- a hole saw on a drill works perfectly and easy:
    Attached Thumbnails Attached Thumbnails holefender.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    Hose attached to duct:
    Attached Thumbnails Attached Thumbnails hoseattached.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    What it looks like from fenderwell:
    Attached Thumbnails Attached Thumbnails endinfenderwell.jpg  

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    Moderating on the run! Big Sky WRX's Avatar
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    stealth mode
    Attached Thumbnails Attached Thumbnails stifogcover.jpg  

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    Great write up Big Sky.

    I also found this on scoobymods.com
    http://www.scoobymods.com/forums/showthread.php?t=1664

  14. #13
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    Great write up!!!

    Thanks Big Sky
    -Brian

    Twisty Monster - 335 ft/lb of torque @ 3600 rpm on a stock turbo. Is that possible? Yes it is.

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    Moderating on the run! Big Sky WRX's Avatar
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    Thank you sirs. I think I'm going to take it a step further and fab a little "scoop", probably out of light aluminum, to help direct air directly into the center of the rotor. Soemthing along the lines of this:


  16. #15
    Moderating on the run! Big Sky WRX's Avatar
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    The EVO comes w/ a factory piece as well

    http://www.mitsubishipartsstore.com/...da9f9baa370666
    Last edited by Big Sky WRX; 05-03-2004 at 07:14 AM.

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