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Wind, noise, and the unique interior air pressure characteristics of the 4Runner/ Sequoia

526 views 2 replies 2 participants last post by  tomekmanoahu  
#1 ·
The most remarkable thing about my old 2002 4Runner was that if you opened the moonroof, and rolled the back window down ONLY 4-5 inches (that's the key part), you'd get an EQUALIZATION OF AIR PRESSURE in the vehicle so that there was virtually no wind.

In a traditional convertible, the rider(s) get thrashed by the wind and noise. But the unique moonroof+ rear slider glass options on the 4Runner allowed me to enjoy the weather in Cabo (where I lived) at highway speeds -- with minimal wind and noise.

This was the #1 reason that I recently purchased a 2002 Sequoia. However, I now have one of the largest Yakima rocketboxes on the top (which is great to avoid car break-ins, because you can put all of your stuff in the rocketbox.

However, the rocketbox seems to create an inordinate amount of wind noise -- and a much windier effect on the interior -- when I try to open the moonroof and the rear window simultaneously.

Does putting things on the roof really compromise that moonroof+sliding glass window combo? I'll obviously take the rocketbox off and test it. But I've been so excited about the unique low-wind characteristics of these vehicles for years, and wanted to share that obsevation on this forum to see any one else's experience.

(For example: do those wind-dams that you can put on your moonroof and or rack do anything? Or, does removing the stock rails on top help with noise?

Also: mileage: I got 14mpg without the rocket box, and now I get <12!! (The moonroof was rusted shut before I got the rocketbox, so I never got the opportunity to test my theory about the unique wind characteristics of the 4Runner/Sequoia...yet. need storage for the huge rocketbox first.)

Cheers,
Tom - San Diego/Tijuana
 
#3 ·
WOW: the difference in mpg was incredible. With my big Yakima rocketbox on top, I was getting 11.5 mpg. With it off, I got 15.5 mpg!!!!!!!! Also, the incredible principle of air pressure I noted above -- that with the moonroof open and the rear slider glass down 4-5 inches you can equalize the air pressure so there's very little wind flowing through the cabin. I drove 12 hours from San Diego to San Francisco, and I had the sunroof (actually, I think it's technically a "moonroof" open the entire drive). THIS is the thing I love the most about 4Runners and Sequioas: its the only vehicle I know off that can be driven at freeway speeds with the windows open WITHOUT lots of noise and wind. Pure bliss...