Quieting a noisy roof rack... - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 6 (permalink) Old 04-24-2009, 03:59 PM Thread Starter
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Quieting a noisy roof rack...

I installed a Surco roof rack a month or so ago. Love the rack, HATE the noise. Anything over 40 MPH was like listening to a radio tower roar in an 85 MPH wind. My fuel mileage has taken a plummet also. The wind roar destroyed the conversional quietness of the Commander.

So, I tried this idea. I bought a piece of 4 inch ABS (e.g. sewer) pipe. I cut it in two, lengthwise. That's quite a trick, by the way. I used a radial arm saw. I needed to add a wedge in the cut side as it went because the pipe's in a bind and tries to close back up, stalling the blade. The second cut is easy to do.

I flipped the upper lights around so they'd hang lower, then notched the half-pipe for them. At first, I used electrical tape for the test drive, then bolts later to make it permanent.

WHAT A DIFFERENCE!

I also put 3/8'' rubber fuel line up into the open space of the cross bars to get rid of the ''flute'' whistling. There's still a little wind whistle, but it's nothing like it was before.

From the front:


Closer view:


From the side. It's pretty simple.


I don't think it looks all that bad. I was about ready to build a wing or spoiler in front of the rack, but this was easier.

Last edited by Adondo; 04-24-2009 at 04:02 PM.
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post #2 of 6 (permalink) Old 04-24-2009, 04:18 PM
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Man thats absolutely ingenious. I cant believe all the tricks you come up with for the xk.
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post #3 of 6 (permalink) Old 04-24-2009, 07:32 PM
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I have the Surco rack and I do not notice any additional noise. Could it be the lights?
 
post #4 of 6 (permalink) Old 04-24-2009, 07:32 PM
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That's one find job of thinkin there.



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post #5 of 6 (permalink) Old 04-24-2009, 10:39 PM
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When I had the Defender light cage on my truck I had a lot of wind noise. The regular Defender rack has been silent for me.

2006 XK Sport, 4.7l, QTII- many mods
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post #6 of 6 (permalink) Old 04-24-2009, 11:33 PM
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I noticed a small SUV with a roof rack at the stoplight the other day. It had a wing type of air deflector at the front and inside the roof rack. At first I thought it was a sun roof that was popped up like they sometimes do. As I looked closer I could see that it was a metal or fiberglass wing. It must be for the same reason. Fortunately we have not had any wind noise from the factory roof pod. I have only removed it once, and that was to clean it and check it. Also, even though it covers the sat antenna, it does not interfere with reception.

Adondo,

You do come up with some interesting projects. Maybe we should start calling your Rube, a gadget guy like me.

I am very lucky to have some world class projects to occupy my mind. It is also nice to have a bunch of craftsmen to make our ideas into reality.

2007 Jeep Green Limited 4.7 Flex Fuel, RR 2.5" 4 inch Superlift coils on rear, 1.5" Spacers, Bridgestone 265/70/17, K&N CAI, Flowmaster, Diamond Plate Locking Trunk, Blue Ox Baseplate w/D-rings, "Get Lost 4X4" Front Bumper, T-Max 9000 winch, "Get Lost rear tire carrier, 30 gal second gas tank.
Second 2007 Jeep Green Limited Leather HEMI QDII VES Uconnect Flowmaster OEM Skids Tow Package

Maybe the two will meet up soon edit: they did , I now have 2,now gave 1 away...and got it back again.

Last edited by HueyPilotVN; 04-24-2009 at 11:40 PM.
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